首页 > 最新文献

bioRxiv - Zoology最新文献

英文 中文
The Social and Nutritional Factors Controlling the Growth of Honey Bee (Apis mellifera) Queens 控制蜜蜂(Apis mellifera)蜂王生长的社会和营养因素
Pub Date : 2024-09-05 DOI: 10.1101/2024.09.05.611439
Omer Kama, Hagai Yehoshua Shpigler
The honey bee queen is essential for colony function, laying thousands of eggs daily and determining the colony's genetic composition. Beekeepers cultivate and trade queens to enhance colony health and productivity. Despite its significance, artificial queen rearing in foster queenless colonies has remained largely unchanged for over a century, offering limited control over the environmental conditions influencing larval development. In this study, we developed a laboratory-based method for queen bee rearing, establishing a protocol for rearing queens in cages in the lab under controlled environmental conditions. We first investigated the minimal number of worker bees required to rear a single queen and found that groups of 200 workers raise queens with comparable success and weight to those reared in colonies. As a proof of concept, we examined the impact of larval age on rearing success in our new system. We found that the age of the larvae affects the success rate of queen development and that younger larvae developed into heavier queens than older larvae, as published in the past using the traditional queen-rearing method. Additionally, we assessed the influence of pollen nutrition on queen-rearing success, finding that a high pollen concentration is crucial for queen development. These findings and the new method provide a foundation for studying queen bee development in a controlled environment and offer potential applications for improving queen-rearing practices.
蜂王对蜂群的功能至关重要,它每天产下数千枚卵,并决定蜂群的基因组成。养蜂人通过培育和买卖蜂王来提高蜂群的健康水平和生产力。尽管蜂王意义重大,但一个多世纪以来,人工培育无王蜂群的蜂王饲养方法基本未变,对影响幼虫发育的环境条件控制有限。在这项研究中,我们开发了一种基于实验室的蜂王饲养方法,建立了一种在可控环境条件下在实验室笼子中饲养蜂王的规程。我们首先研究了饲养一只蜂王所需的最少工蜂数量,发现 200 只工蜂一组饲养蜂王的成功率和重量与蜂群饲养的蜂王相当。作为概念验证,我们研究了幼虫年龄对新系统饲养成功率的影响。我们发现,幼虫的年龄会影响蜂王发育的成功率,而且与过去公布的传统蜂王饲养方法相比,较小的幼虫发育成的蜂王比较大的幼虫重。此外,我们还评估了花粉营养对蜂王培育成功率的影响,发现高浓度的花粉对蜂王的发育至关重要。这些发现和新方法为在受控环境中研究蜂王发育奠定了基础,并为改进蜂王饲养方法提供了潜在的应用前景。
{"title":"The Social and Nutritional Factors Controlling the Growth of Honey Bee (Apis mellifera) Queens","authors":"Omer Kama, Hagai Yehoshua Shpigler","doi":"10.1101/2024.09.05.611439","DOIUrl":"https://doi.org/10.1101/2024.09.05.611439","url":null,"abstract":"The honey bee queen is essential for colony function, laying thousands of eggs daily and determining the colony's genetic composition. Beekeepers cultivate and trade queens to enhance colony health and productivity. Despite its significance, artificial queen rearing in foster queenless colonies has remained largely unchanged for over a century, offering limited control over the environmental conditions influencing larval development. In this study, we developed a laboratory-based method for queen bee rearing, establishing a protocol for rearing queens in cages in the lab under controlled environmental conditions. We first investigated the minimal number of worker bees required to rear a single queen and found that groups of 200 workers raise queens with comparable success and weight to those reared in colonies. As a proof of concept, we examined the impact of larval age on rearing success in our new system. We found that the age of the larvae affects the success rate of queen development and that younger larvae developed into heavier queens than older larvae, as published in the past using the traditional queen-rearing method. Additionally, we assessed the influence of pollen nutrition on queen-rearing success, finding that a high pollen concentration is crucial for queen development. These findings and the new method provide a foundation for studying queen bee development in a controlled environment and offer potential applications for improving queen-rearing practices.","PeriodicalId":501575,"journal":{"name":"bioRxiv - Zoology","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Honey bee egg composition changes seasonally and after acute maternal virus infection 蜜蜂卵子组成的季节性变化和急性母体病毒感染后的变化
Pub Date : 2024-09-05 DOI: 10.1101/2024.09.05.611496
Abigail Chapman, Alison A McAfee, Kenzie L. C. Wrightson, Armando Alcazar Magana, David R Tarpy, Julia D Fine, Zoe Rempel, Kira Peters, Rob W Currie, Shelley E Hoover, Leonard J Foster
Honey bee (Apis mellifera) colonies depend on the reproductive output of their queens, which in turn is contingent on the care provided by worker bees. Viral infections in queens can compromise reproductive output, while worker infections can inhibit the successful functioning of a colony and its ability to care for the queen. Transgenerational immune priming (TGIP) occurs when queens transfer immune-related compounds or immune elicitors to their offspring, enhancing the ability of subsequent generations to resist infections. These maternal effects on offspring could positively impact colony health and resilience to viral infections, but little is currently known about TGIP for viruses. In this study, we investigate how viral infections affect the proteomic composition of eggs laid by virus-challenged queens (injected with a mixture of black queen cell virus and deformed wing virus B), both in controlled experimental settings and natural field conditions. Our results showed that virus-challenged queens upregulated immune effectors in their eggs and ovaries. In contrast, naturally infected queens from field surveys did not; there were no significant differences in egg protein, lipid, or metabolite composition related to maternal viral load or ovary size. However, egg collection date strongly influenced egg composition, likely reflecting seasonal variations in pollen resources. These findings highlight that while viral infections can induce transgenerational effects on egg proteomes under short-term experimental conditions, such effects are less apparent in natural settings and can be overshadowed by seasonal and other ecological factors.
蜜蜂(Apis mellifera)蜂群的生殖能力取决于蜂王,而蜂王的生殖能力又取决于工蜂的照料。蜂王受到病毒感染会影响生殖能力,而工蜂受到感染则会抑制蜂群的成功运作及其照顾蜂王的能力。当蜂王将免疫相关化合物或免疫诱导剂传递给其后代时,就会发生跨代免疫诱导(TGIP),从而增强后代抵抗感染的能力。母体对后代的这些影响可能会对蜂群健康和抵御病毒感染的能力产生积极影响,但目前人们对病毒的 TGIP 还知之甚少。在本研究中,我们调查了病毒感染如何影响病毒感染蜂王(注射黑蜂王细胞病毒和畸形翅病毒 B 的混合物)产下的卵的蛋白质组组成,包括在受控实验环境和自然野外条件下。我们的结果表明,受病毒感染的蜂王会上调其卵和卵巢中的免疫效应因子。与此相反,野外调查中自然感染的蜂王则没有;卵的蛋白质、脂质或代谢物组成与母体病毒载量或卵巢大小没有显著差异。然而,采卵日期对卵的组成有很大影响,这可能反映了花粉资源的季节性变化。这些发现突出表明,虽然病毒感染可在短期实验条件下对卵蛋白质组产生跨代影响,但这种影响在自然环境中并不明显,而且会被季节和其他生态因素所掩盖。
{"title":"Honey bee egg composition changes seasonally and after acute maternal virus infection","authors":"Abigail Chapman, Alison A McAfee, Kenzie L. C. Wrightson, Armando Alcazar Magana, David R Tarpy, Julia D Fine, Zoe Rempel, Kira Peters, Rob W Currie, Shelley E Hoover, Leonard J Foster","doi":"10.1101/2024.09.05.611496","DOIUrl":"https://doi.org/10.1101/2024.09.05.611496","url":null,"abstract":"Honey bee (Apis mellifera) colonies depend on the reproductive output of their queens, which in turn is contingent on the care provided by worker bees. Viral infections in queens can compromise reproductive output, while worker infections can inhibit the successful functioning of a colony and its ability to care for the queen. Transgenerational immune priming (TGIP) occurs when queens transfer immune-related compounds or immune elicitors to their offspring, enhancing the ability of subsequent generations to resist infections. These maternal effects on offspring could positively impact colony health and resilience to viral infections, but little is currently known about TGIP for viruses. In this study, we investigate how viral infections affect the proteomic composition of eggs laid by virus-challenged queens (injected with a mixture of black queen cell virus and deformed wing virus B), both in controlled experimental settings and natural field conditions. Our results showed that virus-challenged queens upregulated immune effectors in their eggs and ovaries. In contrast, naturally infected queens from field surveys did not; there were no significant differences in egg protein, lipid, or metabolite composition related to maternal viral load or ovary size. However, egg collection date strongly influenced egg composition, likely reflecting seasonal variations in pollen resources. These findings highlight that while viral infections can induce transgenerational effects on egg proteomes under short-term experimental conditions, such effects are less apparent in natural settings and can be overshadowed by seasonal and other ecological factors.","PeriodicalId":501575,"journal":{"name":"bioRxiv - Zoology","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phylogenomics of a genus of "Great Speciators" reveals rampant incomplete lineage sorting, gene flow, and mitochondrial capture in island systems 一个 "大物种 "属的系统发生组学揭示了岛屿系统中猖獗的不完全世系分类、基因流动和线粒体捕获现象
Pub Date : 2024-08-29 DOI: 10.1101/2024.08.28.610082
Jenna McCullough, Chad Eliason, Shannon J Hackett, Corinne E Myers, Michael J Andersen
The flora and fauna of island systems, especially those in the Indo-Pacific, are renowned for their high diversification rates and outsized contribution to the development of evolutionary theories. The total diversity of geographic radiations of many Indo-Pacific fauna is often incompletely sampled in phylogenetic studies due to the difficulty in obtaining single island endemic forms across the Pacific and the relatively poor performance of degraded DNA when using museum specimens for inference of evolutionary relationships. New methods for production and analysis of genome-wide datasets sourced from degraded DNA are facilitating insights into the complex evolutionary histories of these influential island faunas. Here, we leverage whole genome resequencing (20X average coverage) and extensive sampling of all taxonomic diversity within Todiramphus kingfishers, a rapid radiation of largely island endemic "Great Speciators." We find that whole genome datasets do not outright resolve the evolutionary relationships of this clade: four types of molecular markers (UCEs, BUSCOs, SNPs, and mtDNA) and tree building methods did not find a single well-supported and concordant species-level topology. We then uncover evidence of widespread incomplete lineage sorting and both ancient and contemporary gene flow and demonstrate how these factors contribute to conflicting evolutionary histories. Our complete taxonomic sampling allowed us to further identify a novel case of mitochondrial capture between two allopatric species, suggesting a potential historical (but since lost) hybrid zone as islands were successively colonized. Taken together, these results highlight how increased genomic and taxon sampling can reveal complex evolutionary patterns in rapid island radiations.
岛屿系统,尤其是印度洋-太平洋岛屿系统的动植物群以其高度多样化率和对进化理论发展的巨大贡献而闻名于世。在系统发育研究中,由于难以获得太平洋地区的单岛特有形式,以及使用博物馆标本推断进化关系时降解 DNA 的性能相对较差,许多印度洋-太平洋动物群的地理辐射总多样性往往取样不全。利用降解 DNA 制作和分析全基因组数据集的新方法有助于深入了解这些具有影响力的岛屿动物群的复杂进化历史。在这里,我们利用全基因组重测序(20 倍平均覆盖率)和对 Todiramphus 翠鸟内所有分类多样性的广泛采样,这是一种主要由岛屿特有的 "大物种 "快速辐射而成的动物。我们发现,全基因组数据集并不能彻底解决该支系的进化关系:四种类型的分子标记(UCEs、BUSCOs、SNPs 和 mtDNA)和树构建方法都没有发现一个支持良好且一致的物种级拓扑结构。随后,我们发现了普遍存在的不完整的种系分类以及古代和当代基因流动的证据,并展示了这些因素是如何导致相互矛盾的进化史的。我们完整的分类取样使我们能够进一步确定两个异源物种之间线粒体捕获的新案例,这表明随着岛屿被陆续殖民,潜在的历史(但已消失)杂交区。综上所述,这些结果突显了增加基因组和分类群取样如何揭示快速岛屿辐射中复杂的进化模式。
{"title":"Phylogenomics of a genus of \"Great Speciators\" reveals rampant incomplete lineage sorting, gene flow, and mitochondrial capture in island systems","authors":"Jenna McCullough, Chad Eliason, Shannon J Hackett, Corinne E Myers, Michael J Andersen","doi":"10.1101/2024.08.28.610082","DOIUrl":"https://doi.org/10.1101/2024.08.28.610082","url":null,"abstract":"The flora and fauna of island systems, especially those in the Indo-Pacific, are renowned for their high diversification rates and outsized contribution to the development of evolutionary theories. The total diversity of geographic radiations of many Indo-Pacific fauna is often incompletely sampled in phylogenetic studies due to the difficulty in obtaining single island endemic forms across the Pacific and the relatively poor performance of degraded DNA when using museum specimens for inference of evolutionary relationships. New methods for production and analysis of genome-wide datasets sourced from degraded DNA are facilitating insights into the complex evolutionary histories of these influential island faunas. Here, we leverage whole genome resequencing (20X average coverage) and extensive sampling of all taxonomic diversity within Todiramphus kingfishers, a rapid radiation of largely island endemic \"Great Speciators.\" We find that whole genome datasets do not outright resolve the evolutionary relationships of this clade: four types of molecular markers (UCEs, BUSCOs, SNPs, and mtDNA) and tree building methods did not find a single well-supported and concordant species-level topology. We then uncover evidence of widespread incomplete lineage sorting and both ancient and contemporary gene flow and demonstrate how these factors contribute to conflicting evolutionary histories. Our complete taxonomic sampling allowed us to further identify a novel case of mitochondrial capture between two allopatric species, suggesting a potential historical (but since lost) hybrid zone as islands were successively colonized. Taken together, these results highlight how increased genomic and taxon sampling can reveal complex evolutionary patterns in rapid island radiations.","PeriodicalId":501575,"journal":{"name":"bioRxiv - Zoology","volume":"173 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Missing links connect the phylogeographic structure of endangered red pandas, remaining as one species -- Ailurus fulgens, and expediting conservation 连接濒危小熊猫系统地理结构的缺失环节,作为一个物种 -- Ailurus fulgens -- 保留下来,并加快保护工作
Pub Date : 2024-08-28 DOI: 10.1101/2024.08.27.609966
Lucy A. Dueck, Deniz Aygoren Uluer
Monitoring biodiversity depends on well-informed taxonomy, reflecting the underlying biology of organisms critical for appropriate conservation management. The taxonomy of red pandas, endangered mammals distributed along a ~2500km montane range fringing the southern Tibetan Plateau, has been perplexing. Finally resolved as evolutionarily unique Musteloidea, further division of Ailurus into two geographic variants remains contentious. Red pandas are threatened by extinction from anthropogenic disturbances with consequent population decline; continued gene flow is therefore crucial to maintain adaptive potential. A recent phylogenomic study from sampling range ends and a constrictive species concept split red pandas into two species. Subsequent studies supplied additional data missing from their midrange. We evaluated GenBank mtDNA sequences from 393 animals, plotted sampling locations, and analyzed with and without midrange samples. Two sublineages of monophyletic Ailurus were weakly supported by one method when the midrange was excluded, but not when it was included. Using more stringent analyses, Ailurus was strongly confirmed as a single species in all circumstances, although the western sublineage (A. f. fulgens) was weakly supported within. Four haplogroups associated with specific regions, suggesting broad phylogeographic patterning and gene flow, with sympatric crossover and a cline bracketing unsampled Bhutan in the midrange. Red pandas are due for IUCN Red List reassessment in 2025; unwarranted taxonomic revision would delay and imperil action needed to prevent extinction. We recommend maintaining Ailurus as one species, recognizing and protecting biodiversity at one intraspecific level, allowing for gene flow in conservation management, and extensively investigating intergradation of midrange red pandas.
对生物多样性的监测有赖于对生物分类学的充分了解,分类学反映了生物的基本生物学特性,对适当的保护管理至关重要。小熊猫是一种濒危哺乳动物,分布在青藏高原南部边缘约2500千米的高山地带,其分类学一直令人困惑。小熊猫最终被确定为进化上独一无二的鼬科动物,但将其进一步划分为两个地理变种仍存在争议。人为干扰导致种群数量下降,小熊猫面临灭绝的威胁;因此,持续的基因流动对于保持适应潜力至关重要。最近的一项系统发生学研究从采样范围的末端和收缩的物种概念出发,将小熊猫分为两个物种。随后的研究提供了中段缺失的额外数据。我们评估了来自 393 只动物的 GenBank mtDNA 序列,绘制了采样位置图,并分析了有中段样本和无中段样本的情况。在一种方法中,当排除中段样本时,单系Ailurus的两个亚系得到弱支持,但当包括中段样本时,则不支持。使用更严格的分析方法,Ailurus 在所有情况下都被强烈证实为一个单一物种,尽管西部亚系(A. f. fulgens)在其中得到微弱支持。四个单倍群与特定区域相关联,表明存在广泛的系统地理格局和基因流动,在中段存在同域交叉和一条包围未取样的不丹的支系。小熊猫将于 2025 年接受世界自然保护联盟(IUCN)红色名录的重新评估;不必要的分类学修订将推迟并危及防止小熊猫灭绝所需的行动。我们建议将小熊猫维持为一个物种,在一个种内水平上承认和保护生物多样性,在保护管理中允许基因流动,并广泛调查中段小熊猫的相互融合。
{"title":"Missing links connect the phylogeographic structure of endangered red pandas, remaining as one species -- Ailurus fulgens, and expediting conservation","authors":"Lucy A. Dueck, Deniz Aygoren Uluer","doi":"10.1101/2024.08.27.609966","DOIUrl":"https://doi.org/10.1101/2024.08.27.609966","url":null,"abstract":"Monitoring biodiversity depends on well-informed taxonomy, reflecting the underlying biology of organisms critical for appropriate conservation management. The taxonomy of red pandas, endangered mammals distributed along a ~2500km montane range fringing the southern Tibetan Plateau, has been perplexing. Finally resolved as evolutionarily unique Musteloidea, further division of Ailurus into two geographic variants remains contentious. Red pandas are threatened by extinction from anthropogenic disturbances with consequent population decline; continued gene flow is therefore crucial to maintain adaptive potential. A recent phylogenomic study from sampling range ends and a constrictive species concept split red pandas into two species. Subsequent studies supplied additional data missing from their midrange. We evaluated GenBank mtDNA sequences from 393 animals, plotted sampling locations, and analyzed with and without midrange samples. Two sublineages of monophyletic Ailurus were weakly supported by one method when the midrange was excluded, but not when it was included. Using more stringent analyses, Ailurus was strongly confirmed as a single species in all circumstances, although the western sublineage (A. f. fulgens) was weakly supported within. Four haplogroups associated with specific regions, suggesting broad phylogeographic patterning and gene flow, with sympatric crossover and a cline bracketing unsampled Bhutan in the midrange. Red pandas are due for IUCN Red List reassessment in 2025; unwarranted taxonomic revision would delay and imperil action needed to prevent extinction. We recommend maintaining Ailurus as one species, recognizing and protecting biodiversity at one intraspecific level, allowing for gene flow in conservation management, and extensively investigating intergradation of midrange red pandas.","PeriodicalId":501575,"journal":{"name":"bioRxiv - Zoology","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The evolution of wasp mimicry and biogeography in the genus Temnostoma (Diptera: Syrphidae) Temnostoma属(双翅目:蚜科)黄蜂拟态和生物地理学的进化
Pub Date : 2024-08-27 DOI: 10.1101/2024.08.27.609869
Jiří Hadrava, Jan Klečka, Kevin Moran, Irena Klečková, Scott Kelso, Claudia Etzbauer, Jeffrey H. Skevington, Ximo Mengual
One of the most remarkable examples of Batesian mimicry occurs in the genus Temnostoma Le Peletier & Audinet-Serville, 1828 (Diptera: Syrphidae). Adults of this genus have an overall resemblance to hymenopterans combined with behavioural mimicry (they move the fore legs in front of the head mimicking hymenopteran antennae). While some species of Temnostoma are considered perfect mimics of social wasps, other species have a darker colour pattern and are rather imperfect mimics. Both colour morphs are widespread through the Holarctic. Here, we infer for the first time the evolutionary history of the genus with special focus on the evolution of mimicry and biogeography. With material covering 75 % of known species of Temnostoma and both colour morphs from each biogeographical region, we inferred a molecular phylogeny based on six molecular markers (mitochondrial protein-coding COI gene, nuclear 28s rRNA gene, and four nuclear protein-coding genes: AATS, CK1, TULP, and RBP-15). Using Bayesian inference, we obtained a highly resolved phylogenetic tree supporting the monophyly of the genus Temnostoma as a sister group of genus Takaomyia Hervé-Bazin, 1914. Within Temnostoma, Te. daochus and Te. barberi (two Nearctic species with strikingly different mimicry patterns) were found to be closely related to each other and together form a lineage sister to the rest of the genus. Our results suggest that the behavioural mimicry of wasp antennae is a plesiomorphic state inherited from a common ancestor that includes the genera Temnostoma and Takaomyia. Within Temnostoma, the dark colour pattern (imperfect mimicry) appeared to be an ancestral state and perfect wasp mimicry evolved two times independently within the genus. In some species inhabiting northern parts of the Holarctic, secondary darkening and consequent degradation of the wasp mimicry appeared. This indicates high evolutionary plasticity and ongoing selection pressure on morphological characters related to mimicry in hover flies.
贝茨拟态最显著的例子之一出现在 Temnostoma Le Peletier & Audinet-Serville, 1828 属(双翅目:蚜科)。该属的成虫整体上与膜翅目昆虫相似,并具有行为模仿能力(它们将前肢移到头部前方,模仿膜翅目昆虫的触角)。某些种类的 Temnostoma 被认为是社会黄蜂的完美模仿者,而其他种类的颜色图案较深,是不完美的模仿者。这两种颜色形态在整个北半球都很普遍。在这里,我们首次推断了该属的进化史,并特别关注拟态和生物地理学的进化。我们利用来自各个生物地理区域的 75% 的已知 Temnostoma 物种和两种颜色形态的材料,基于六个分子标记(线粒体蛋白编码 COI 基因、核 28s rRNA 基因和四个核蛋白编码基因)推断了分子系统进化史:AATS、CK1、TULP 和 RBP-15)。利用贝叶斯推断法,我们得到了一棵高度解析的系统发生树,支持 Temnostoma 属作为 Takaomyia 属 Hervé-Bazin,1914 年的姊妹群的单系性。在Temnostoma属中,Te. daochus和Te. barberi(两个拟态模式截然不同的近地物种)被发现彼此亲缘关系密切,并共同形成了一个与该属其他物种的姊妹系。我们的研究结果表明,黄蜂触角的行为拟态是从包括Temnostoma属和Takaomyia属在内的共同祖先那里继承下来的一种多态性状态。在Temnostoma属中,深色图案(不完全拟态)似乎是一种祖先状态,而完美的黄蜂拟态在该属中独立进化了两次。在一些栖息于北极北部地区的物种中,黄蜂拟态出现了二次变黑和随之退化的现象。这表明食蚜蝇与拟态有关的形态特征具有高度的进化可塑性和持续的选择压力。
{"title":"The evolution of wasp mimicry and biogeography in the genus Temnostoma (Diptera: Syrphidae)","authors":"Jiří Hadrava, Jan Klečka, Kevin Moran, Irena Klečková, Scott Kelso, Claudia Etzbauer, Jeffrey H. Skevington, Ximo Mengual","doi":"10.1101/2024.08.27.609869","DOIUrl":"https://doi.org/10.1101/2024.08.27.609869","url":null,"abstract":"One of the most remarkable examples of Batesian mimicry occurs in the genus Temnostoma Le Peletier & Audinet-Serville, 1828 (Diptera: Syrphidae). Adults of this genus have an overall resemblance to hymenopterans combined with behavioural mimicry (they move the fore legs in front of the head mimicking hymenopteran antennae). While some species of Temnostoma are considered perfect mimics of social wasps, other species have a darker colour pattern and are rather imperfect mimics. Both colour morphs are widespread through the Holarctic. Here, we infer for the first time the evolutionary history of the genus with special focus on the evolution of mimicry and biogeography. With material covering 75 % of known species of Temnostoma and both colour morphs from each biogeographical region, we inferred a molecular phylogeny based on six molecular markers (mitochondrial protein-coding COI gene, nuclear 28s rRNA gene, and four nuclear protein-coding genes: AATS, CK1, TULP, and RBP-15). Using Bayesian inference, we obtained a highly resolved phylogenetic tree supporting the monophyly of the genus Temnostoma as a sister group of genus Takaomyia Hervé-Bazin, 1914. Within Temnostoma, Te. daochus and Te. barberi (two Nearctic species with strikingly different mimicry patterns) were found to be closely related to each other and together form a lineage sister to the rest of the genus. Our results suggest that the behavioural mimicry of wasp antennae is a plesiomorphic state inherited from a common ancestor that includes the genera Temnostoma and Takaomyia. Within Temnostoma, the dark colour pattern (imperfect mimicry) appeared to be an ancestral state and perfect wasp mimicry evolved two times independently within the genus. In some species inhabiting northern parts of the Holarctic, secondary darkening and consequent degradation of the wasp mimicry appeared. This indicates high evolutionary plasticity and ongoing selection pressure on morphological characters related to mimicry in hover flies.","PeriodicalId":501575,"journal":{"name":"bioRxiv - Zoology","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neuropeptides from a praying mantis: What the loss of pyrokinins and tryptopyrokinins suggests about the endocrine functions of these peptides 来自螳螂的神经肽:焦激肽和色激肽的缺失对这些肽的内分泌功能有何启示
Pub Date : 2024-08-23 DOI: 10.1101/2024.08.22.609177
Jan Adrianus Veenstra
Background. Neuropeptides play important roles in insects, but in many cases their functions remain obscure. Comparative neuropeptidome analyses may provide clues to what these functions might be. Praying mantises are predators and close relatives of cockroaches that are scavengers. Cockroach neuropeptidomes are well established, but little is known about mantis neuropeptides. The recently published genome assembly of the praying mantis Tenodera sinensis makes it possble to change that. Methods. The genome assembly from T. sinensis was analyzed for the presence of genes coding neuropeptides. For comparison publicly available short read archives from this and other mantis species were also examined for the presence and expression of neuropeptides.Results. As a rule the neuropeptidomes of the Mantodea and Blattodea are almost identical; praying mantises and cockroaches use very similar neuropeptides. However, there is one surprising exception. Praying mantises lack the receptors for pyrokinins, including those for the tryptopyrokinins. No typical pyrokinin genes were found, but some species do have a tryptopyrokinin gene, in others this has also been lost and in one species it is a speudogene. For most praying mantises there is no information where tryptopyrokinin is expressed, but in Deroplatys truncata it is in the thorax and thus not in the suboesophageal ganglion as in other insects. In the genomic short read archives of two species, out 52, sequences were found for a tryptopyrokinin specific receptor. The phylogenetic position of those two species implies that the receptor gene was independently lost on multiple occasions. The loss of the tryptopyrokinin gene also happened more than once.Discussion. The multiple independent losses of the pyrokinin receptors in mantises suggests that these receptors are irrelevant in praying mantises. This is very surprising, since expression of tryptopyrokinin is very strongly conserved in two neuroendocrine cells in the suboeosphageal ganglion. In those species for which this is known, the expression of its receptor is in the salivary gland. As a neuroendocrine. tryptopyrokinin is unlikely to acutely regulate salivation, which in other insects is regulated by well characterized neurons. If the action of tryptopyrokinin were to prime the salivary gland for subsequent salivation, it would make perfect sense for a praying mantis to loose this capacity, as they can not anticipate when they will catch their next prey. Priming the salivary gland hours before it is actually needed would be energetically costly. The other pyrokinins are known to facilitate feeding and may in a similar fashion prime muscles needed for moving to the food source and digesting it. This hypothesis provides a good explanation as to why praying mantises do not need pyrokinins and also what the function of these ubiquitous arthropod neuropeptides may be.
背景。神经肽在昆虫中发挥着重要作用,但在许多情况下,它们的功能仍不明确。神经肽组的比较分析可为了解这些功能提供线索。螳螂是捕食者,也是蟑螂的近亲。蟑螂的神经肽组已经非常成熟,但对螳螂的神经肽却知之甚少。最近公布的中华螳螂(Tenodera sinensis)基因组组装结果有可能改变这一现状。研究方法对中华螳螂的基因组进行分析,以确定是否存在编码神经肽的基因。为了进行比较,还研究了该螳螂和其他螳螂物种的公开短读取档案,以确定神经肽的存在和表达。一般来说,螳螂科和蜚蠊科的神经肽群几乎完全相同;螳螂和蜚蠊使用的神经肽非常相似。然而,有一个令人惊讶的例外。螳螂缺乏热激肽受体,包括色激肽受体。没有发现典型的热激肽基因,但有些物种确实有一个色激肽基因,在其他物种中,这个基因也已经丢失,在一个物种中,它是一个矛基因。大多数螳螂没有关于色激肽在哪里表达的信息,但在 Deroplatys truncata 中,色激肽在胸部表达,因此不像其他昆虫那样在食管下神经节中表达。在两个物种的基因组短读数档案中,共发现了 52 个物种的色激肽特异性受体序列。这两个物种的系统发育位置意味着该受体基因曾多次独立丢失。色激肽基因的丢失也不止一次。螳螂体内热激肽受体的多次独立丢失表明,这些受体与螳螂无关。这是非常令人惊讶的,因为在卵磷脂下神经节的两个神经内分泌细胞中,色激肽的表达是非常保守的。在已知的物种中,其受体在唾液腺中表达。作为一种神经内分泌物质,色激肽不太可能对唾液分泌进行急性调节,在其他昆虫中,唾液分泌是由特征明显的神经元调节的。如果色激肽的作用是为唾液腺随后的分泌唾液做准备,那么螳螂失去这种能力就完全说得通了,因为它们无法预测何时才能捕捉到下一个猎物。在真正需要唾液腺分泌唾液的几小时前就对其进行引流,会耗费大量能量。众所周知,其他的焦激肽能促进进食,并能以类似的方式刺激肌肉,使它们移动到食物来源处并消化食物。这一假说很好地解释了为什么螳螂不需要焦激肽,以及这些无处不在的节肢动物神经肽的功能。
{"title":"Neuropeptides from a praying mantis: What the loss of pyrokinins and tryptopyrokinins suggests about the endocrine functions of these peptides","authors":"Jan Adrianus Veenstra","doi":"10.1101/2024.08.22.609177","DOIUrl":"https://doi.org/10.1101/2024.08.22.609177","url":null,"abstract":"Background. Neuropeptides play important roles in insects, but in many cases their functions remain obscure. Comparative neuropeptidome analyses may provide clues to what these functions might be. Praying mantises are predators and close relatives of cockroaches that are scavengers. Cockroach neuropeptidomes are well established, but little is known about mantis neuropeptides. The recently published genome assembly of the praying mantis Tenodera sinensis makes it possble to change that. Methods. The genome assembly from T. sinensis was analyzed for the presence of genes coding neuropeptides. For comparison publicly available short read archives from this and other mantis species were also examined for the presence and expression of neuropeptides.\u0000Results. As a rule the neuropeptidomes of the Mantodea and Blattodea are almost identical; praying mantises and cockroaches use very similar neuropeptides. However, there is one surprising exception. Praying mantises lack the receptors for pyrokinins, including those for the tryptopyrokinins. No typical pyrokinin genes were found, but some species do have a tryptopyrokinin gene, in others this has also been lost and in one species it is a speudogene. For most praying mantises there is no information where tryptopyrokinin is expressed, but in Deroplatys truncata it is in the thorax and thus not in the suboesophageal ganglion as in other insects. In the genomic short read archives of two species, out 52, sequences were found for a tryptopyrokinin specific receptor. The phylogenetic position of those two species implies that the receptor gene was independently lost on multiple occasions. The loss of the tryptopyrokinin gene also happened more than once.\u0000Discussion. The multiple independent losses of the pyrokinin receptors in mantises suggests that these receptors are irrelevant in praying mantises. This is very surprising, since expression of tryptopyrokinin is very strongly conserved in two neuroendocrine cells in the suboeosphageal ganglion. In those species for which this is known, the expression of its receptor is in the salivary gland. As a neuroendocrine. tryptopyrokinin is unlikely to acutely regulate salivation, which in other insects is regulated by well characterized neurons. If the action of tryptopyrokinin were to prime the salivary gland for subsequent salivation, it would make perfect sense for a praying mantis to loose this capacity, as they can not anticipate when they will catch their next prey. Priming the salivary gland hours before it is actually needed would be energetically costly. The other pyrokinins are known to facilitate feeding and may in a similar fashion prime muscles needed for moving to the food source and digesting it. This hypothesis provides a good explanation as to why praying mantises do not need pyrokinins and also what the function of these ubiquitous arthropod neuropeptides may be.","PeriodicalId":501575,"journal":{"name":"bioRxiv - Zoology","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring the uncharted: Novel potential filariasis vectors unveiled in Sri Lanka 探索未知领域:斯里兰卡新发现的丝虫病潜在病媒
Pub Date : 2024-08-23 DOI: 10.1101/2024.08.23.609308
Sachini U Nimalrathna, Chathuri Amarasiri, Kaveesha Aluthge, Chandana Mallawarachchi, Nilmini Chandrasena, Nissanka de Silva, Nilanthi de Silva, Michael Kimber, Hiruni Harischandra
Brugian filariasis (BF) has reemerged in Sri Lanka recently. Studies suggest the emergence of a variant brugian parasite. Knowledge on transmission dynamics is important in restraining the spread of infection. This study investigated the potential vector mosquitoes of this variant brugian parasite around six indexed human BF cases in five BF endemic districts in Sri Lanka. A total of 1711 mosquitoes from 20 species were analyzed. Potential infective mosquitoes were detected by the presence of L3 larval stage of brugian parasites within the head and thorax regions upon dissections and confirmed by amplification of the Brugia species-specific HhaI region. Twelve (12) mosquito species that could potentially serve as vectors for BF transmission in selected endemic areas in the country were identified due to the presence of L3 larvae in the head and thorax regions. This is the first report of Ma. indiana, Ar. subalbatus, Ae. albopictus, Cq. crassipes, Cx. tritaeniorhynchus, Cx. bitaeniorhynchus, Cx. quinquefasciatus, Cx. gelidus, Cx. lopoceraomyia and Cx. vishnui with the potential of serving as vectors for BF transmission in Sri Lanka and Cx. bitaeniorhynchus, Cx. gelidus, Cx. lopoceraomyia and Cx. vishnui in the world through a field study. Of these, Ma. indiana, Cx. tritaeniorhynchus, Cx. quinquefasciatus and Ar. subalbatus together with Ma. uniformis, Ma. annulifera had the highest prevalence and infection rate at certain study sites. The recovery of parasite-positive Ma. indiana, Cx. quinquefasciatus and Ar. subalbatus mosquitoes from window traps demonstrate the probable anthropophilic nature of these species, and their high prevalence in the respective areas deems further investigation on their vector potentiality essential.
布鲁氏丝虫病(BF)最近在斯里兰卡再次出现。研究表明,出现了一种变种布鲁氏寄生虫。了解传播动态对抑制感染蔓延非常重要。本研究调查了斯里兰卡五个布鲁氏菌流行区的六个人类布鲁氏菌病例周围的变异布鲁氏菌潜在病媒蚊子。共分析了 20 个种类的 1711 只蚊子。潜在感染蚊子是通过解剖头部和胸部区域后发现布鲁氏寄生虫的 L3 幼虫阶段,并通过布鲁氏菌物种特异性 HhaI 区域的扩增进行确认。由于头胸部存在 L3 幼虫,因此确定了 12 种蚊子,这些蚊子有可能成为布鲁氏菌在该国选定流行地区传播的病媒。这是首次报告Ma. indiana、Ar. subalbatus、Ae. albopictus、Cq. crassipes、Cx.通过实地研究,发现了斯里兰卡有可能成为 BF 传播媒介的 Cx.bitaeniorhynchus、Cx.gelidus、Cx.lopoceraomyia 和 Cx.vishnui,以及全球有可能成为 BF 传播媒介的 Cx.bitaeniorhynchus、Cx.gelidus、Cx.lopoceraomyia 和 Cx.vishnui。其中,Ma. indiana、Cx. tritaeniorhynchus、Cx. quinquefasciatus 和 Ar. subalbatus 与 Ma. uniformis、Ma. annulifera 在某些研究地点的流行率和感染率最高。从窗式诱捕器中发现寄生虫阳性的印度疟蚊、五步蛇蚊和亚疟蚊表明,这些物种可能具有嗜人类的特性,它们在相应地区的高流行率表明,进一步调查它们的病媒潜能至关重要。
{"title":"Exploring the uncharted: Novel potential filariasis vectors unveiled in Sri Lanka","authors":"Sachini U Nimalrathna, Chathuri Amarasiri, Kaveesha Aluthge, Chandana Mallawarachchi, Nilmini Chandrasena, Nissanka de Silva, Nilanthi de Silva, Michael Kimber, Hiruni Harischandra","doi":"10.1101/2024.08.23.609308","DOIUrl":"https://doi.org/10.1101/2024.08.23.609308","url":null,"abstract":"Brugian filariasis (BF) has reemerged in Sri Lanka recently. Studies suggest the emergence of a variant brugian parasite. Knowledge on transmission dynamics is important in restraining the spread of infection. This study investigated the potential vector mosquitoes of this variant brugian parasite around six indexed human BF cases in five BF endemic districts in Sri Lanka. A total of 1711 mosquitoes from 20 species were analyzed. Potential infective mosquitoes were detected by the presence of L3 larval stage of brugian parasites within the head and thorax regions upon dissections and confirmed by amplification of the Brugia species-specific HhaI region. Twelve (12) mosquito species that could potentially serve as vectors for BF transmission in selected endemic areas in the country were identified due to the presence of L3 larvae in the head and thorax regions. This is the first report of Ma. indiana, Ar. subalbatus, Ae. albopictus, Cq. crassipes, Cx. tritaeniorhynchus, Cx. bitaeniorhynchus, Cx. quinquefasciatus, Cx. gelidus, Cx. lopoceraomyia and Cx. vishnui with the potential of serving as vectors for BF transmission in Sri Lanka and Cx. bitaeniorhynchus, Cx. gelidus, Cx. lopoceraomyia and Cx. vishnui in the world through a field study. Of these, Ma. indiana, Cx. tritaeniorhynchus, Cx. quinquefasciatus and Ar. subalbatus together with Ma. uniformis, Ma. annulifera had the highest prevalence and infection rate at certain study sites. The recovery of parasite-positive Ma. indiana, Cx. quinquefasciatus and Ar. subalbatus mosquitoes from window traps demonstrate the probable anthropophilic nature of these species, and their high prevalence in the respective areas deems further investigation on their vector potentiality essential.","PeriodicalId":501575,"journal":{"name":"bioRxiv - Zoology","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Changing air density affects flight costs in low-flying birds 空气密度变化影响低飞鸟类的飞行成本
Pub Date : 2024-08-22 DOI: 10.1101/2024.08.21.608961
Emily L C Shepard, Baptiste Garde, Krishnamoorthy Krishnan, Adam Fell, Vikash Tataya, Carl G Jones, Nik C Cole, Emmanouil Lempidakis
Regional patterns in wind underpin the low-cost migratory flyways of billions of birds and insects, but how large-scale changes in temperature affect flight is unknown. Flight costs should increase with rising temperatures, because lift decreases as density decreases, whereas weight remains unchanged. The effects of air density on flight costs are well-established in the context of high-altitude movements and migration. Here, we examine the impact of air density on low-flying birds, in relation to seasonal, regional and global changes in temperature. Using multi-sensor loggers, we find that air density was the most important predictor of wingbeat frequency in red-tailed tropicbirds (Phaethon rubricauda) breeding year-round in Mauritius. Lower air densities in the Austral summer were associated with a small but significant increase in mean wingbeat frequency, which translated to an estimated 1-2% increase in flight costs. The variation in flight costs increased by an order of magnitude when considered in space, rather than time, with flight costs varying by ≥ 10 % across the tropicbirds range. Changes in air density can therefore be an important determinant of flight costs even when birds are operating close to sea-level. Indeed, mapping air density at sea-level revealed that global temperature gradients cause effective altitude to vary by >2 km when considered as seasonal averages. This invisible topography at sea-level could have influenced the biogeography of flight morphologies and life-history traits.
风的区域模式是数十亿鸟类和昆虫低成本迁徙飞行的基础,但温度的大规模变化如何影响飞行尚不清楚。飞行成本应该会随着温度的升高而增加,因为升力会随着密度的降低而减小,而重量则保持不变。空气密度对飞行成本的影响已在高空运动和迁徙中得到证实。在这里,我们研究了空气密度对低空飞行鸟类的影响,以及与季节、区域和全球温度变化的关系。通过使用多传感器记录仪,我们发现空气密度是预测全年在毛里求斯繁殖的红尾鸏(Phaethon rubricauda)拍翅频率的最重要因素。澳大拉西亚夏季较低的空气密度与平均振翅频率的小幅但显著增加有关,这意味着飞行成本估计会增加 1-2%。如果从空间而不是时间角度考虑,飞行成本的变化会增加一个数量级,在整个热带鸟类分布区,飞行成本的变化≥10%。因此,即使鸟类在海平面附近活动,空气密度的变化也可能是飞行成本的重要决定因素。事实上,绘制海平面空气密度图显示,如果考虑到季节平均值,全球温度梯度会导致有效飞行高度变化2千米。这种无形的海平面地形可能影响了飞行形态和生活史特征的生物地理学。
{"title":"Changing air density affects flight costs in low-flying birds","authors":"Emily L C Shepard, Baptiste Garde, Krishnamoorthy Krishnan, Adam Fell, Vikash Tataya, Carl G Jones, Nik C Cole, Emmanouil Lempidakis","doi":"10.1101/2024.08.21.608961","DOIUrl":"https://doi.org/10.1101/2024.08.21.608961","url":null,"abstract":"Regional patterns in wind underpin the low-cost migratory flyways of billions of birds and insects, but how large-scale changes in temperature affect flight is unknown. Flight costs should increase with rising temperatures, because lift decreases as density decreases, whereas weight remains unchanged. The effects of air density on flight costs are well-established in the context of high-altitude movements and migration. Here, we examine the impact of air density on low-flying birds, in relation to seasonal, regional and global changes in temperature. Using multi-sensor loggers, we find that air density was the most important predictor of wingbeat frequency in red-tailed tropicbirds (Phaethon rubricauda) breeding year-round in Mauritius. Lower air densities in the Austral summer were associated with a small but significant increase in mean wingbeat frequency, which translated to an estimated 1-2% increase in flight costs. The variation in flight costs increased by an order of magnitude when considered in space, rather than time, with flight costs varying by ≥ 10 % across the tropicbirds range. Changes in air density can therefore be an important determinant of flight costs even when birds are operating close to sea-level. Indeed, mapping air density at sea-level revealed that global temperature gradients cause effective altitude to vary by >2 km when considered as seasonal averages. This invisible topography at sea-level could have influenced the biogeography of flight morphologies and life-history traits.","PeriodicalId":501575,"journal":{"name":"bioRxiv - Zoology","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temperature fluctuations influence predictions of landscape-scale patterns of spruce budworm defoliation 温度波动对云杉芽虫落叶景观尺度模式预测的影响
Pub Date : 2024-08-19 DOI: 10.1101/2024.08.19.608715
Emily Nicole Black, Deepa S Pureswaran, Katie Elizabeth Marshall
The geographic range of insects is heavily influenced by their tolerance for stressful abiotic conditions, including temperature. While many studies on insect thermal tolerance consider temperature exposure, the frequency of temperature exposures is emerging as an important and generally overlooked driver of insect fitness. The (eastern) spruce budworm (Choristoneura fumiferana) is a lepidopteran defoliating pest of coniferous forests across Canada whose outbreaks lead to large-scale tree mortality. Studies have shown the frequency of temperature fluctuations affects spruce budworm overwintering survival rates in the laboratory; however, the influence of temperature fluctuations on spruce budworm defoliation at the landscape level has not been investigated. We used a species distribution model approach to evaluate the influence of temperature fluctuations on the distribution and severity of spruce budworm defoliation. We combined publicly available maps of spruce budworm outbreaks between 2006-2016 in Quebec with climate, temperature fluctuation, and forest composition predictors to train a species distribution model. Our model evaluated how predictors influence spruce budworm defoliation, and compared these results to a model trained without temperature fluctuations. Additionally, we predicted future spruce budworm defoliation under 2041-2070 climate change conditions using the models trained with and without temperature fluctuation predictors and compared the results to determine the effect of temperature fluctuations on future defoliation predictions. We found that model performance improved with the inclusion of temperature fluctuation predictors, and these predictors ranked highly, relative to predictors in other categories. The model trained with temperature fluctuation predictors also predicted vastly different defoliation distribution and severity across Quebec and Ontario than the model trained without them under climate change conditions. These results reveal the previously overlooked importance of temperature fluctuations on landscape-scale spruce budworm defoliation and support their inclusion in insect species distribution models.
昆虫的地理分布范围在很大程度上受其对包括温度在内的应激非生物条件的耐受性的影响。尽管许多关于昆虫热耐受性的研究都考虑了温度暴露,但温度暴露的频率正逐渐成为昆虫适应性的一个重要而通常被忽视的驱动因素。东部云杉芽虫(Choristoneura fumiferana)是加拿大针叶林中的一种鳞翅目落叶害虫,它的爆发会导致树木大规模死亡。研究表明,温度波动的频率会影响云杉芽虫在实验室中的越冬存活率;然而,温度波动对云杉芽虫落叶在景观层面上的影响尚未得到研究。我们采用物种分布模型的方法来评估温度波动对云杉芽虫落叶分布和严重程度的影响。我们将公开的 2006-2016 年魁北克云杉芽虫爆发地图与气候、温度波动和森林组成预测因子相结合,训练出一个物种分布模型。我们的模型评估了预测因子对云杉芽虫落叶的影响,并将这些结果与没有温度波动的模型进行了比较。此外,我们还使用使用温度波动预测因子和不使用温度波动预测因子训练的模型预测了 2041-2070 年气候变化条件下未来云杉芽虫的落叶情况,并对结果进行了比较,以确定温度波动对未来落叶预测的影响。我们发现,加入温度波动预测因子后,模型的性能有所提高,而且相对于其他类别的预测因子,这些预测因子的排名靠前。在气候变化条件下,使用温度波动预测因子训练的模型与不使用温度波动预测因子训练的模型相比,对魁北克省和安大略省落叶分布和严重程度的预测也大不相同。这些结果揭示了之前被忽视的温度波动对景观尺度云杉芽虫落叶的重要性,并支持将其纳入昆虫物种分布模型。
{"title":"Temperature fluctuations influence predictions of landscape-scale patterns of spruce budworm defoliation","authors":"Emily Nicole Black, Deepa S Pureswaran, Katie Elizabeth Marshall","doi":"10.1101/2024.08.19.608715","DOIUrl":"https://doi.org/10.1101/2024.08.19.608715","url":null,"abstract":"The geographic range of insects is heavily influenced by their tolerance for stressful abiotic conditions, including temperature. While many studies on insect thermal tolerance consider temperature exposure, the frequency of temperature exposures is emerging as an important and generally overlooked driver of insect fitness. The (eastern) spruce budworm (<em>Choristoneura fumiferana</em>) is a lepidopteran defoliating pest of coniferous forests across Canada whose outbreaks lead to large-scale tree mortality. Studies have shown the frequency of temperature fluctuations affects spruce budworm overwintering survival rates in the laboratory; however, the influence of temperature fluctuations on spruce budworm defoliation at the landscape level has not been investigated. We used a species distribution model approach to evaluate the influence of temperature fluctuations on the distribution and severity of spruce budworm defoliation. We combined publicly available maps of spruce budworm outbreaks between 2006-2016 in Quebec with climate, temperature fluctuation, and forest composition predictors to train a species distribution model. Our model evaluated how predictors influence spruce budworm defoliation, and compared these results to a model trained without temperature fluctuations. Additionally, we predicted future spruce budworm defoliation under 2041-2070 climate change conditions using the models trained with and without temperature fluctuation predictors and compared the results to determine the effect of temperature fluctuations on future defoliation predictions. We found that model performance improved with the inclusion of temperature fluctuation predictors, and these predictors ranked highly, relative to predictors in other categories. The model trained with temperature fluctuation predictors also predicted vastly different defoliation distribution and severity across Quebec and Ontario than the model trained without them under climate change conditions. These results reveal the previously overlooked importance of temperature fluctuations on landscape-scale spruce budworm defoliation and support their inclusion in insect species distribution models.","PeriodicalId":501575,"journal":{"name":"bioRxiv - Zoology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The heat sensitivity of sperm in the lizard Anolis sagrei 沙蜥精子对热的敏感性
Pub Date : 2024-08-19 DOI: 10.1101/2024.08.14.607821
Wayne Wen-Yeu Wang, Alex R. Gunderson, Natalie R. Page, Anthony M. Strickler, Alicia K. Kusaka
The heat sensitivity of reproduction is a critical determinant of population persistence under climate change. However, the heat sensitivity of gametes is poorly known relative to adults. We developed a method to measure the heat tolerance of lizard sperm cells, and used the method to test several aspects of sperm cell thermal biology in the brown anole lizard (Anolis sagrei). We estimated the repeatability of sperm traits by measuring heat tolerance and baseline motility of ejaculated sperm from the same individuals multiple times over 21 days. To investigate co-adaptation of sperm and adult thermal traits, we tested for a correlation between sperm heat tolerance and the heat tolerance of adults that produced them. Furthermore, we tested for effects of episodic heat stress experienced by males on sperm performance. Sperm heat tolerance and motility were both repeatable, consistent with evolutionary potential, though there was clear evidence for environmental effects on these traits as well. Contrary to the expectation of thermal co-adaptation, we found no correlation between sperm and adult heat tolerance. A single, episodic extreme heat event experienced by adult males immediately impaired sperm motility, consistent with detrimental effects of adult heat stress on stored sperm. Our study adds to the mounting evidence that sperm are heat-sensitive and represent a vulnerability to global warming, but also suggest evolutionary potential for thermal adaptation at the gamete level.
繁殖的热敏感性是决定气候变化下种群持续性的关键因素。然而,相对于成体而言,配子的热敏感性却鲜为人知。我们开发了一种测量蜥蜴精子细胞耐热性的方法,并用这种方法测试了褐巨蜥(Anolis sagrei)精子细胞热生物学的几个方面。我们在21天内多次测量同一个体射出精子的耐热性和基线活力,从而估计精子性状的可重复性。为了研究精子和成体热特征的共同适应性,我们测试了精子耐热性与产生精子的成体耐热性之间的相关性。此外,我们还测试了雄性个体所经历的偶发性热应激对精子性能的影响。精子的耐热性和活力都是可重复的,这与进化潜力是一致的,但也有明显的证据表明环境对这些性状也有影响。与预期的热共同适应相反,我们发现精子和成体的耐热性之间没有相关性。成年雄性动物经历了一次偶发的极端高温事件后,精子的运动能力立即受损,这与成年热应激对储存精子的有害影响是一致的。我们的研究补充了越来越多的证据,表明精子对热敏感,容易受到全球变暖的影响,同时也表明配子水平的热适应具有进化潜力。
{"title":"The heat sensitivity of sperm in the lizard Anolis sagrei","authors":"Wayne Wen-Yeu Wang, Alex R. Gunderson, Natalie R. Page, Anthony M. Strickler, Alicia K. Kusaka","doi":"10.1101/2024.08.14.607821","DOIUrl":"https://doi.org/10.1101/2024.08.14.607821","url":null,"abstract":"The heat sensitivity of reproduction is a critical determinant of population persistence under climate change. However, the heat sensitivity of gametes is poorly known relative to adults. We developed a method to measure the heat tolerance of lizard sperm cells, and used the method to test several aspects of sperm cell thermal biology in the brown anole lizard (Anolis sagrei). We estimated the repeatability of sperm traits by measuring heat tolerance and baseline motility of ejaculated sperm from the same individuals multiple times over 21 days. To investigate co-adaptation of sperm and adult thermal traits, we tested for a correlation between sperm heat tolerance and the heat tolerance of adults that produced them. Furthermore, we tested for effects of episodic heat stress experienced by males on sperm performance. Sperm heat tolerance and motility were both repeatable, consistent with evolutionary potential, though there was clear evidence for environmental effects on these traits as well. Contrary to the expectation of thermal co-adaptation, we found no correlation between sperm and adult heat tolerance. A single, episodic extreme heat event experienced by adult males immediately impaired sperm motility, consistent with detrimental effects of adult heat stress on stored sperm. Our study adds to the mounting evidence that sperm are heat-sensitive and represent a vulnerability to global warming, but also suggest evolutionary potential for thermal adaptation at the gamete level.","PeriodicalId":501575,"journal":{"name":"bioRxiv - Zoology","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
bioRxiv - Zoology
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1