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Synergistic Effects of Climate Change and Alien Fish Invasions in Freshwater Ecosystems: A Review 气候变化与淡水生态系统外来鱼类入侵的协同效应研究进展
3区 农林科学 Q2 FISHERIES Pub Date : 2023-09-28 DOI: 10.3390/fishes8100486
Antonella Carosi, Francesca Lorenzoni, Massimo Lorenzoni
The interaction between climate warming and alien fish invasions could have severe consequences in inland waters, which represent isolated environments with high biodiversity richness. Due to the current climatic trend, increasing water temperatures and salinization, shorter ice cover period, and altered flow regimes are predicted for these environments. The aim of this review is to offer a comprehensive analysis at a global scale of the recent studies available in the literature, focused on the responses of invasive freshwater fish to the effects of climate change in both lotic and lentic environments. To achieve this purpose, we selected 34 relevant papers, using the Scopus and Google Scholar database. New alien species establishment, distribution range expansion of species already introduced, and exacerbating impacts on freshwater ecosystems and the native fish communities they host were included in the topics covered by the analyzed papers. Despite the uncertainties related to the unpredictability with which the effects of global warming will occur, the findings of the selected studies served as a support to evaluate conservation and management implications, with particular reference to possible mitigation strategies.
气候变暖和外来鱼类入侵之间的相互作用可能对内陆水域造成严重后果,内陆水域是生物多样性丰富的孤立环境。由于当前的气候趋势,预计这些环境的水温和盐碱化会增加,冰盖期会缩短,流动状态会改变。这篇综述的目的是在全球范围内对现有文献中的最新研究进行全面分析,重点关注入侵淡水鱼对水生和水生环境中气候变化影响的反应。为了达到这一目的,我们选择了34篇相关论文,使用Scopus和谷歌Scholar数据库。新外来物种的建立、已引进物种分布范围的扩大以及对淡水生态系统和本地鱼类群落的加剧影响都包括在分析论文的主题中。尽管全球变暖的影响将以不可预测性的方式发生,这是不确定的,但选定的研究结果可作为评价保护和管理影响的支助,特别是关于可能的缓解战略。
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引用次数: 0
Climate Change May Impact Nile Tilapia, Oreochromis niloticus (Linnaeus, 1758) Distribution in the Southeastern Arabian Peninsula through Range Contraction under Various Climate Scenarios 气候变化对尼罗罗非鱼(Oreochromis niloticus, Linnaeus, 1758)在阿拉伯半岛东南部分布的影响
3区 农林科学 Q2 FISHERIES Pub Date : 2023-09-27 DOI: 10.3390/fishes8100481
Hamid Reza Esmaeili, Zohreh Eslami Barzoki
Climate change is expected to affect freshwater water bodies worldwide, especially those located in semiarid and arid regions, including the Arabian Peninsula. Species distribution modeling has been widely used to predict the effects of climate changes on aquatic species. Occurrence records of the cichlid fish Nile tilapia, Oreochromis niloticus, were geographically mapped, followed by the implementation of species distribution models to delineate its range within the sensitive inland water system of the southeastern Arabian Peninsula. The analysis encompassed the examination of species presence data in the context of environmental variables, leading to the development of an ensemble model for habitat suitability, combining four distinct species distribution models. The findings indicated that the mean diurnal range and precipitation seasonality emerged as the most influential factors in predicting the suitability of habitats for O. niloticus. The response curve analysis indicated that the presence probability of O. niloticus decreased with increasing mean diurnal range and decreasing precipitation seasonality. The suitable distribution ranges for O. niloticus in the studied area were mainly distributed in the northeast of this region, where native/endemic fish diversity is high. The ensemble model results specified a significant impact of climate change on O. niloticus distribution, so highly suitable areas for this species will be reduced, while areas with low to moderate suitability increase slightly or remain unchanged. While O. niloticus is anticipated to display resilience and prosper under the influence of climate change, it remains paradoxical that its habitats are at risk of being compromised by climate-induced alterations. Consequently, even this resilient species stands susceptible to the repercussions of climate change. Due to the worldwide severe impacts of Nile tilapia, regular monitoring of freshwater ecosystems and fish fauna—especially in the northeast of the Arabian Peninsula, which has currently been invaded by this alien species—and protecting the region from key anthropogenic stressors are recommended to successfully conserve the freshwater fishes, which include about 22 recognized fish species in 16 genera, 10 families, 7 orders, and a class including 20 natives (7 endemic) species, out of which 13 species co-occur in sympatricity with O. niloticus.
预计气候变化将影响全球的淡水水体,特别是位于半干旱和干旱地区的淡水水体,包括阿拉伯半岛。物种分布模型已被广泛用于预测气候变化对水生物种的影响。对尼罗罗非鱼(Oreochromis niloticus)的发生记录进行了地理制图,并建立了物种分布模型,以确定其在阿拉伯半岛东南部敏感内陆水系中的分布范围。该分析包括在环境变量的背景下对物种存在数据的检查,从而结合四种不同的物种分布模型,开发了栖息地适宜性的集合模型。结果表明,平均日差和降水季节性是预测niloticus生境适宜性的最重要因素。响应曲线分析表明,niloticus的存在概率随平均日差的增大和降水季节性的减小而减小。研究区niloticus的适宜分布范围主要集中在本区的东北部,该地区本地/特有种鱼类多样性较高。集合模型结果表明,气候变化对niloticus分布有显著影响,因此高度适宜区将减少,低至中等适宜区略有增加或保持不变。虽然预计niloticus在气候变化的影响下会表现出适应力和繁殖力,但它的栖息地面临着因气候变化而受到损害的风险,这仍然是矛盾的。因此,即使是这种有弹性的物种也容易受到气候变化的影响。由于尼罗罗非鱼在世界范围内的严重影响,建议定期监测淡水生态系统和鱼类种群,特别是在阿拉伯半岛东北部,目前已经受到这种外来物种的入侵,并保护该地区免受主要人为压力的影响,以成功保护淡水鱼,其中包括16属,10科,7目,20种本地(7种特有种)的22种已知鱼类。其中13种与niloticus共生。
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引用次数: 0
Implications of Warming on the Morphometric and Reproductive Traits of the Green Crab, Carcinus maenas 气候变暖对绿蟹形态计量学和生殖特性的影响
3区 农林科学 Q2 FISHERIES Pub Date : 2023-09-27 DOI: 10.3390/fishes8100485
João N. Monteiro, Juan Bueno-Pardo, Miguel Pinto, Miguel A. Pardal, Filipe Martinho, Francisco Leitão
Understanding the relationship between environmental temperature and the biological traits of organisms is fundamental to inferring the potential impacts of climate change. In the case of marine poikilotherm species, seawater temperature is one of the main driving forces of biological processes, with consequences at higher levels of organization such as population and ecosystem. In this study, we analysed differences in maximum carapace width (CWmax), size at maturation, relative size at maturation, and duration of the reproductive season for the green crab (Carcinus maenas) along a temperature gradient. An extensive review of bibliographic data was performed on studies published between 1962 and 2020, gathering C. maenas data from 55 different populations, spread over 20 degrees of latitude and 14.2 °C of sea surface temperature (SST). In addition, green crab data were collected at five different lagoons and estuaries along the continental Portuguese coast. The relationship between average SST and CWmax, age of maturation, reduction of size at maturation, and duration of egg bearing was analysed to understand the role of SST in driving variation in these C. maenas characteristics across a latitudinal gradient. There was a significant relationship between SST and CWmax for males and SST and CW of females at maturation, respectively. The results extrapolate for each local projected temperature increase caused by climate change and suggest an effect on the morphometric and reproductive traits of C. maenas across regions. These changes comprise an overall reduction in C. maenas body size, an enlargement of the reproductive season, a shortening in the duration of larval developmental time, and a decrease in the relative size of crabs at maturation. Secondary consequences on the fecundity and connectivity of populations are discussed.
了解环境温度与生物特性之间的关系是推断气候变化潜在影响的基础。就海洋变温物种而言,海水温度是生物过程的主要驱动力之一,对种群和生态系统等更高层次的组织产生影响。在本研究中,我们分析了绿蟹(Carcinus maenas)的最大甲壳宽度(CWmax)、成熟时大小、成熟时相对大小和繁殖季节持续时间在温度梯度上的差异。对1962年至2020年间发表的研究进行了广泛的文献数据回顾,收集了分布在20度纬度和14.2°C海表温度(SST)上的55个不同种群的C. maenas数据。此外,在葡萄牙大陆沿岸的五个不同泻湖和河口收集了绿蟹的数据。分析了平均海温与CWmax、成熟年龄、成熟时缩小尺寸和产卵时间之间的关系,以了解海温在驱动这些特征在纬度梯度上的变化中的作用。雄性成熟期海温与CWmax、雌性成熟期海温与CW分别呈显著相关。这些结果推断了气候变化引起的每个地区的预估温度升高,并表明了气候变化对各地区红毛蚶形态计量学和生殖性状的影响。这些变化包括大闸蟹体型的总体缩小、繁殖季节的延长、幼虫发育时间的缩短以及成熟时蟹的相对大小的减小。讨论了对种群繁殖力和连通性的次要影响。
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引用次数: 0
In Silico Chromosome Mapping of the Male-Specific/Linked Loci in the Jade Perch (Scortum barcoo) Suggests Chromosome 19 as the Putative Y Sex Chromosome 玉鲈(Scortum barcoo)雄性特异性/连锁位点的计算机染色体定位提示第19号染色体可能是Y性染色体
3区 农林科学 Q2 FISHERIES Pub Date : 2023-09-27 DOI: 10.3390/fishes8100482
Thitipong Panthum, Pish Wattanadilokchatkun, Kitipong Jaisamut, Worapong Singchat, Syed Farhan Ahmad, Narongrit Muangmai, Prateep Duengkae, Agostinho Antunes, Kornsorn Srikulnath
Jade perch (Scortum barcoo) has an XX/XY sex-determination system (SDS); however, its sex chromosomes and sex-determining region remain unknown. The recent availability of the jade perch chromosome-level genomic data provides a valuable resource for pinpointing the location of functional genes and the whole genomic structure. In this study, we conducted. In silico chromosome mapping of male-specific/linked loci of jade perch and identified a potential 11.18 Mb male-linked region localized on chromosome 19 (SBA19). Repeat annotations of the male-linked region revealed an abundance of transposable elements, particularly Ty3/Gypsy and novel repeats. Sequence analysis of this region identified a remnant of amh gene, which is considered a potential candidate for SDS in many teleosts. A duplicate copy of amh remnant was located at SBA6. These duplicated amh copies were highly similar to those of XX/XY SDS in teleosts, in which one copy of amh was identified on the Y sex chromosome. Taken all together, we hypothesize SBA19 as the putative sex chromosome and the 11.18 Mb male-linked region to be a potential male-determining region.
玉鲈(Scortum barcoo)具有XX/XY性别测定系统(SDS);然而,它的性染色体和性别决定区域仍然未知。近年来玉鲈染色体水平基因组数据的获得为定位功能基因和整个基因组结构提供了宝贵的资源。在这项研究中,我们进行了。对玉鲈雄性特异性/连锁位点进行计算机染色体定位,鉴定出位于第19染色体上的11.18 Mb雄性连锁区(SBA19)。男性连锁区域的重复注释显示了丰富的转座元件,特别是Ty3/Gypsy和新颖的重复。该区域的序列分析鉴定出amh基因的残余,该基因被认为是许多硬鱼SDS的潜在候选者。在SBA6处发现了amh残体的重复拷贝。这些重复的amh拷贝与硬骨鱼的XX/XY SDS高度相似,其中在Y性染色体上鉴定了一个amh拷贝。综上所述,我们假设SBA19是假定的性染色体,11.18 Mb的男性连锁区域是潜在的男性决定区域。
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引用次数: 0
Detecting Japanese Eels (Anguilla japonica) and Revealing Their Distribution in Taiwanese Rivers by Environmental DNA Analysis 台湾河流中日本鳗鲡的环境DNA分析及其分布
3区 农林科学 Q2 FISHERIES Pub Date : 2023-09-27 DOI: 10.3390/fishes8100483
Hsiang-Yi Hsu, Kai-Jen Wu, Yu-San Han
The Japanese eel (Anguilla japonica) is the most prevalent freshwater eel species in Taiwan. However, its population has undergone a significant decline in recent decades due to factors such as overfishing, habitat destruction, and the effects of climate change. Urgent action is needed to conserve this species. Before implementing conservation measures, it is imperative to ascertain the distribution of Japanese eels in Taiwan’s rivers. This study’s primary objective was to assess the effectiveness of eDNA analysis as a method for detecting Japanese eels. To achieve this goal, we compared eDNA analysis data with results obtained from electrofishing, with the Fengshan and Shimen Rivers serving as our designated test sites. Additionally, we collected water samples from 34 other rivers across Taiwan to comprehensively assess the species’ wider distribution using eDNA analysis. Our findings demonstrated eDNA analysis’s viability for detecting Japanese eels. Of the 36 rivers tested, Japanese eel DNA was detected in samples from 21 rivers, scattered across northern, eastern, southern, and western Taiwan, with no specific concentration in any region. We also noted reduced detectability of Japanese eel DNA in highly polluted rivers, indicating that river pollution may have a potential impact on their population. In the future, expanding eDNA analysis to more rivers could identify additional rivers that Japanese eels inhabit. Subsequently, resource management and conservation efforts can be focused on these identified habitats. Furthermore, developing advanced eDNA-based methods for estimating the abundance or biomass of Japanese eels could enhance the flexibility of management and conservation measures.
日本鳗(Anguilla japonica)是台湾最常见的淡水鳗种。然而,近几十年来,由于过度捕捞、栖息地破坏和气候变化等因素,其种群数量显著下降。需要采取紧急行动保护这一物种。在实施保育措施前,必须先查明日本鳗鱼在台湾河流中的分布情况。本研究的主要目的是评估eDNA分析作为检测日本鳗鱼的方法的有效性。为了实现这一目标,我们将eDNA分析数据与电钓结果进行了比较,并将凤山河和石门河作为指定的测试地点。此外,我们收集了台湾其他34条河流的水样,利用eDNA分析全面评估了该物种的更广泛分布。我们的发现证明了eDNA分析检测日本鳗鱼的可行性。在测试的36条河流中,在21条河流的样本中检测到日本鳗鱼的DNA,这些河流分布在台湾北部、东部、南部和西部,没有任何地区的特定浓度。我们还注意到,在高度污染的河流中,日本鳗鱼DNA的可检测性降低,这表明河流污染可能对其种群产生潜在影响。将来,将eDNA分析扩展到更多的河流,可以确定日本鳗鱼栖息的其他河流。随后,资源管理和保护工作可以集中在这些已确定的生境上。此外,开发先进的基于edna的方法来估计日本鳗鱼的丰度或生物量可以提高管理和保护措施的灵活性。
{"title":"Detecting Japanese Eels (Anguilla japonica) and Revealing Their Distribution in Taiwanese Rivers by Environmental DNA Analysis","authors":"Hsiang-Yi Hsu, Kai-Jen Wu, Yu-San Han","doi":"10.3390/fishes8100483","DOIUrl":"https://doi.org/10.3390/fishes8100483","url":null,"abstract":"The Japanese eel (Anguilla japonica) is the most prevalent freshwater eel species in Taiwan. However, its population has undergone a significant decline in recent decades due to factors such as overfishing, habitat destruction, and the effects of climate change. Urgent action is needed to conserve this species. Before implementing conservation measures, it is imperative to ascertain the distribution of Japanese eels in Taiwan’s rivers. This study’s primary objective was to assess the effectiveness of eDNA analysis as a method for detecting Japanese eels. To achieve this goal, we compared eDNA analysis data with results obtained from electrofishing, with the Fengshan and Shimen Rivers serving as our designated test sites. Additionally, we collected water samples from 34 other rivers across Taiwan to comprehensively assess the species’ wider distribution using eDNA analysis. Our findings demonstrated eDNA analysis’s viability for detecting Japanese eels. Of the 36 rivers tested, Japanese eel DNA was detected in samples from 21 rivers, scattered across northern, eastern, southern, and western Taiwan, with no specific concentration in any region. We also noted reduced detectability of Japanese eel DNA in highly polluted rivers, indicating that river pollution may have a potential impact on their population. In the future, expanding eDNA analysis to more rivers could identify additional rivers that Japanese eels inhabit. Subsequently, resource management and conservation efforts can be focused on these identified habitats. Furthermore, developing advanced eDNA-based methods for estimating the abundance or biomass of Japanese eels could enhance the flexibility of management and conservation measures.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135579957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Three Microalgal Diets Varying in LC-PUFA Composition on Growth, Fad, and Elovl Expressions, and Fatty Acid Profiles in Juvenile Razor Clam Sinonovacula constricta 不同LC-PUFA组成的三种微藻饲料对缢蛏幼鱼生长、Fad和Elovl表达及脂肪酸谱的影响
3区 农林科学 Q2 FISHERIES Pub Date : 2023-09-27 DOI: 10.3390/fishes8100484
Fei Kong, Zhaoshou Ran, Haixuan Xie, Xuxu Tian, Kai Liao, Jilin Xu
The razor clam Sinonovacula constricta is the first marine mollusk demonstrated to possess the complete long-chain polyunsaturated fatty acids (LC-PUFA) biosynthetic pathway. This study explored the impact of different microalgae on growth, Fad and Elovl expressions, and fatty acid (FA) profiles in juvenile S. constricta. Results revealed that juveniles fed with Isochrysis galbana (rich in DHA) or Chaetoceros calcitrans (rich in EPA) consistently exhibited higher growth than those fed Chlorella sp. (rich in LA and ALA), underscoring the importance of dietary LC-PUFA in S. constricta’s development. Expression of most Fad and Elovl in C. calcitrans and I. galbana-fed juveniles were initially up-regulated, then down-regulated, suggesting LC-PUFA demand for faster growth. Although Chlorella sp.-fed juveniles exhibited decreased mRNA levels for most genes, levels were notably higher lately compared to those fed C. calcitrans or I. galbana, hinting at potential LC-PUFA biosynthesis induction. FA profiles in S. constricta generally mirrored those in ingested microalgae, implying direct FA accumulation from diets. Some microalgal FA were absent in farmed S. constricta, while others emerged, indicating S. constricta’s ability to selectively accumulate and synthesize FA. This study enhances the understanding of dietary FA metabolism in S. constricta, valuable for selecting appropriate microalgae in its farming practices.
狭蛏(Sinonovacula constricta)是第一个被证实具有完整的长链多不饱和脂肪酸(LC-PUFA)生物合成途径的海洋软体动物。本研究探讨了不同微藻对缢蛏幼体生长、Fad和Elovl表达以及脂肪酸(FA)谱的影响。结果显示,喂食富含DHA的等chrysis galbana或富含EPA的Chaetoceros calcitrans的幼鱼的生长速度始终高于喂食富含LA和ALA的小球藻(Chlorella sp.)的幼鱼,这表明饲料中LC-PUFA对缢蛏发育的重要性。大部分Fad和Elovl在C. calcitrans和I. galbana喂养的幼鱼中表达呈先上调后下调的趋势,表明对lcpufa有较快的生长需求。虽然小球藻喂养的幼鱼大多数基因的mRNA水平下降,但近期水平明显高于c.c calcitrans或i.g albana喂养的幼鱼,暗示可能诱导LC-PUFA的生物合成。缢蛏体内的FA谱与摄入的微藻的FA谱基本一致,表明FA的直接积累来自于饮食。在养殖的缢蛏中,一些微藻不存在FA,而另一些则出现了FA,这表明缢蛏有选择性地积累和合成FA的能力。本研究提高了对缢蛏饲料FA代谢的认识,为缢蛏养殖中选择适宜的微藻提供了依据。
{"title":"Effects of Three Microalgal Diets Varying in LC-PUFA Composition on Growth, Fad, and Elovl Expressions, and Fatty Acid Profiles in Juvenile Razor Clam Sinonovacula constricta","authors":"Fei Kong, Zhaoshou Ran, Haixuan Xie, Xuxu Tian, Kai Liao, Jilin Xu","doi":"10.3390/fishes8100484","DOIUrl":"https://doi.org/10.3390/fishes8100484","url":null,"abstract":"The razor clam Sinonovacula constricta is the first marine mollusk demonstrated to possess the complete long-chain polyunsaturated fatty acids (LC-PUFA) biosynthetic pathway. This study explored the impact of different microalgae on growth, Fad and Elovl expressions, and fatty acid (FA) profiles in juvenile S. constricta. Results revealed that juveniles fed with Isochrysis galbana (rich in DHA) or Chaetoceros calcitrans (rich in EPA) consistently exhibited higher growth than those fed Chlorella sp. (rich in LA and ALA), underscoring the importance of dietary LC-PUFA in S. constricta’s development. Expression of most Fad and Elovl in C. calcitrans and I. galbana-fed juveniles were initially up-regulated, then down-regulated, suggesting LC-PUFA demand for faster growth. Although Chlorella sp.-fed juveniles exhibited decreased mRNA levels for most genes, levels were notably higher lately compared to those fed C. calcitrans or I. galbana, hinting at potential LC-PUFA biosynthesis induction. FA profiles in S. constricta generally mirrored those in ingested microalgae, implying direct FA accumulation from diets. Some microalgal FA were absent in farmed S. constricta, while others emerged, indicating S. constricta’s ability to selectively accumulate and synthesize FA. This study enhances the understanding of dietary FA metabolism in S. constricta, valuable for selecting appropriate microalgae in its farming practices.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135579955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Regulation of Gene Expression in Fish 鱼类基因表达的调控
3区 农林科学 Q2 FISHERIES Pub Date : 2023-09-26 DOI: 10.3390/fishes8100480
Rigers Bakiu
Pollution of the aquatic environment has become a severe global concern due to rising levels of toxins connected with human activities, such as industry, mining, agriculture, and domestic waste generation [...]
由于与人类活动(如工业、采矿、农业和家庭废物产生)有关的毒素水平不断上升,水生环境污染已成为一个严重的全球关注问题。
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引用次数: 0
Assessment of Age and Growth in Fishes 鱼类年龄和生长的评估
3区 农林科学 Q2 FISHERIES Pub Date : 2023-09-26 DOI: 10.3390/fishes8100479
Ana Rita Vieira
Fish are the largest and most diverse group of vertebrates [...]
鱼类是世界上最大、种类最多的脊椎动物。
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引用次数: 0
Successful Cryopreservation of Spermatogonia Stem Cells of Neotropical Catfish (Rhamdia quelen) and Enriched Germ Cell Transplantation into Common Carp (Cyprinus carpio) Testes 新热带鲶鱼精原细胞的成功低温保存及富生殖细胞移植至鲤鱼睾丸
3区 农林科学 Q2 FISHERIES Pub Date : 2023-09-25 DOI: 10.3390/fishes8100478
Ivana F. Rosa, Emanuel Ricardo Monteiro Martinez, Melanie Digmayer, Lucas B. Doretto, Rafael H. Nóbrega
Cryopreservation and transplantation of spermatogonial stem cells (SSCs) offer new possibilities in the conservation of valuable genetic resources. Therefore, the present study developed a cryopreservation method for whole testicular tissue and for spermatogonial stem cells of jundia catfish (Rhamdia quelen) and developed an enriched germ cell transplantation of jundia catfish into depleted common carp (Cyprinus carpio) testes. Our findings from whole testes indicate that the cryoprotectants MeOH (1.3 M), DMSO (1.4 M), and EG (1.4 M) resulted in high cell viability rates of 67%, 62%, and 51.5%, respectively. Notably, in the case of enriched post-thaw SSCs, DMSO exhibited the highest cell viability at 27%, followed by EG at 16% and MeOH at 7%. Additionally, we observed the successful colonization and proliferation of jundia germ cells within the recipient gonads of common carp following transplantation. Notably, Sertoli cells were identified in the recipient gonads, providing support to the stained donor germ cells and indicated the formation of cysts. Our data suggest that cryopreserving entire testicular tissue presents a viable alternative to cryopreserving isolated testicular cells, and the spermatogonial cells isolated from testes of jundia retained transplantability characteristics. Nonetheless, more investigations are required to reach the goal of functional gamete and to assess the effectiveness of transplantation using these cryopreserved tissues. Taken together, proper cryopreservation methodology and transplantation technology could aid the preservation practice of fish genetic resources.
精原干细胞的低温保存和移植为保存宝贵的遗传资源提供了新的可能性。为此,本研究建立了jundia catfish (Rhamdia quelen)全睾丸组织和精原干细胞的冷冻保存方法,并将jundia catfish的富集生殖细胞移植到枯竭的鲤鱼(Cyprinus carpio)睾丸中。我们对全睾丸的研究结果表明,低温保护剂MeOH (1.3 M)、DMSO (1.4 M)和EG (1.4 M)的细胞存活率分别为67%、62%和51.5%。值得注意的是,在解冻后富集的ssc中,DMSO的细胞活力最高,为27%,其次是EG,为16%,MeOH为7%。此外,我们观察到jundia生殖细胞在移植后在普通鲤鱼受体性腺内成功定植和增殖。值得注意的是,在受体性腺中发现了支持细胞,为染色的供体生殖细胞提供支持,并表明囊肿的形成。我们的数据表明,冷冻保存整个睾丸组织是冷冻保存分离睾丸细胞的可行选择,并且从jundia睾丸分离的精原细胞保留了可移植特性。然而,需要更多的研究来达到功能性配子的目标,并评估使用这些冷冻保存组织移植的有效性。适当的冷冻保存方法和移植技术有助于鱼类遗传资源的保存实践。
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引用次数: 1
A Novel Method for Sensitive Detection of Vibrio alginolyticus Based on Aptamer and Hybridization Chain Reaction in Aquaculture 基于适体和杂交链反应的水产养殖溶藻弧菌灵敏检测新方法
3区 农林科学 Q2 FISHERIES Pub Date : 2023-09-24 DOI: 10.3390/fishes8100477
Yifan Zhao, Sheng Luo, Zhaohui Qiao, Qianjin Zhou, Jianzhong Fan, Jianfei Lu, Jiong Chen
In this study, we developed a novel method for the detection of Vibrio alginolyticus, utilizing the specific recognition of an aptamer for V. alginolyticus and signal amplification via hybridization chain reaction (HCR) and horseradish-peroxidase-conjugated streptavidin. The proposed HCR-based multivalent aptamer (multi-Apt) amplifier allows for sensitive detection of V. alginolyticus in a linear range from 10 to 107 CFU/mL. The linear equation is y = 747.5x + 126.2, R2 = 0.986, and the limit of detection (LOD) is 3 CFU/mL. Seawater and freshwater samples were utilized in the spike recovery experiment, yieldng a recovery rates ranging from 94.3% to 108.8%. The relative standard deviation (RSD) for all samples is below 6.73%. Taken together, the proposed method has great potential for application in monitoring of V. alginolyticus in aquaculture environments.
在这项研究中,我们开发了一种检测溶藻弧菌的新方法,利用对溶藻弧菌适体的特异性识别,并通过杂交链反应(HCR)和辣根-过氧化物酶共轭链霉亲和素进行信号扩增。所提出的基于hcr的多价适体(multi-Apt)放大器允许在10至107 CFU/mL的线性范围内对溶藻弧菌进行敏感检测。线性方程为y = 747.5x + 126.2, R2 = 0.986,检出限(LOD)为3 CFU/mL。采用海水和淡水样品进行尖峰回收实验,回收率为94.3% ~ 108.8%。所有样品的相对标准偏差(RSD)均小于6.73%。综上所述,该方法在水产养殖环境中对溶藻弧菌的监测具有很大的应用潜力。
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引用次数: 0
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Fishes
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