Pub Date : 2023-05-12DOI: 10.1093/ornithology/ukad024
Jesse Kemp, W. Boyd, T. M. Forstner, D. Esler, T. Bowman, D. Douglas, Danica Hogan, M. Mcadie, Jonathan Thompson, Megan Willie, D. Green
ABSTRACT Timing of seasonal bird migrations is broadly determined by internal biological clocks, which are synchronized by photoperiod, but individuals often refine their migratory timing decisions in response to external factors. Using 11 years of satellite telemetry data, we show that Pacific Barrow's Goldeneye (Bucephala islandica) at higher latitudes initiated spring and molt migrations later and fall migration earlier than individuals at lower latitudes. We further show that individuals refined migratory timing in response to interannual variation in environmental conditions. Individual Barrow's Goldeneye initiated spring migration earlier in years with warmer springs at their overwintering locations and concluded spring migration earlier in years with earlier annual snowmelt on their breeding grounds. Because individuals respond to conditions both where they initiate and where they conclude spring migration, our results suggest that Barrow's Goldeneye update their migratory decisions en route. For all 3 migrations in their annual cycle, birds delayed initiating migration if they had been captured and tagged prior to that migration. Birds that initiated migration late for their latitude were less likely to include a stopover and completed that migration faster, partially compensating for delayed departures. Our results are consistent with the hypothesis that Barrow's Goldeneye uses a combination of endogenous cues and environmental cues in migratory decision making. Sensitivity to environmental cues suggests that Barrow's Goldeneye may have behavioral plasticity that is adaptive when faced with ongoing climate change. LAY SUMMARY Migratory birds time their annual migrations to take advantage of temporal and spatial variation in resources, disease, and predation. Timing of these migrations is broadly determined by an internal biological clock set by day length, but individuals may refine when and how they migrate in response to environmental conditions. We used 11 years of satellite tracking data to investigate migratory cues in Barrow's Goldeneye, a species of sea duck. We found that birds used weather conditions as migratory cues, leaving their wintering grounds earlier in warmer springs and arriving on their breeding grounds earlier when the snow melted earlier in the year. Because individuals respond to conditions both where they start and where they end spring migration, our results suggest that Barrow's Goldeneye update their migratory decisions during migration. Barrow's Goldeneye's ability to respond to environmental cues suggests that they may be able to adapt to ongoing climate change. RÉSUMÉ Le calendrier des migrations saisonnières des oiseaux est largement déterminé par les horloges biologiques internes, qui sont synchronisées par la photopériode, mais les individus affinent souvent leurs décisions en matière de calendrier migratoire en réponse à des facteurs externes. En utilisant 11 années de données de télémétrie par satellite
季节性鸟类的迁徙时间大致由内部生物钟决定，而内部生物钟由光周期同步，但个体经常根据外部因素调整其迁徙时间决定。利用11年的卫星遥测数据，我们发现高纬度地区的太平洋Barrow’s Goldeneye (Bucephala islandica)比低纬度地区的个体更晚开始春季和蜕皮迁徙，更早开始秋季迁徙。我们进一步表明，个体根据环境条件的年际变化调整了迁徙时间。随着越冬地春天变暖，个体巴罗的金眼蝶开始春季迁徙的时间会提前;随着繁殖地每年融雪的时间提前，个体巴罗的金眼蝶结束春季迁徙的时间会提前。因为个体对它们开始和结束春季迁徙的地方的条件都有反应，我们的研究结果表明，巴罗的金眼在迁徙途中更新了它们的迁徙决定。在每年的三次迁徙中，如果鸟类在迁徙之前被捕获并贴上标签，它们就会推迟开始迁徙。在他们的纬度开始迁徙的较晚的鸟类不太可能包括中途停留，并且更快地完成了迁徙，部分补偿了延迟的出发。我们的研究结果与巴罗的黄金眼在迁徙决策中结合了内源性和环境因素的假设是一致的。对环境线索的敏感性表明，巴罗的金眼可能具有行为可塑性，在面对持续的气候变化时具有适应性。候鸟利用资源、疾病和捕食的时空变化来确定每年迁徙的时间。这些迁徙的时间大致上是由由白昼长度设定的内部生物钟决定的，但个体可能会根据环境条件调整迁徙的时间和方式。我们使用了11年的卫星跟踪数据来调查巴罗金眼鸭(一种海鸭)的迁徙线索。我们发现，鸟类利用天气条件作为迁徙的线索，在温暖的春天更早地离开越冬地，在雪融化的时候更早地到达繁殖地。因为个体对它们开始和结束春季迁徙的地方都有反应，我们的研究结果表明，巴罗的金眼在迁徙过程中更新了它们的迁徙决定。巴罗的黄金眼对环境线索的反应能力表明，它们可能能够适应持续的气候变化。RÉSUMÉ历年表的迁移过程是由较大的个体决定的，同步的个体决定的是由光波决定的，同步的个体决定的是由光波决定的，历年表的迁移过程是由外部因素决定的。现在11排数据de telemetrie卫星,我们montrons les每个de高龄人口多de la de l财产的游客开始les迁移printanieres et de mue + tard et la迁移automnale +合计辅助纬度+与变量的每个se trouvant辅助纬度+低音提琴。在不同的条件和环境条件下，不同的个体在不同的年轮间有不同的迁移。开始的个体迁移和开始的个体迁移+ tôt开始的个体迁移和开始的个体迁移+ tôt开始的个体迁移和结束的个体迁移+ tôt开始的个体迁移和结束的个体迁移+ tôt开始的个体迁移和结束的个体迁移+ tôt开始的个体迁移和结束的个体迁移+如果个人不同意其他条件，请参照下列原则:开始和终止移徙，请参照下列原则:开始和终止移徙，请参照下列原则:在移徙途中，请参照下列原则:从三个方面来看，从三个方面来看，从三个方面来看，从三个方面来看，从三个方面来看，从三个方面来看，从三个方面来看，从三个方面来看，从三个方面来看，从三个方面来看，都是非常重要的。从开始到迁移，从迁移到迁移，从迁移到迁移，从易受影响的纬度到易受影响的纬度，包括单一尺度的迁移和终止的迁移，再到快速的补偿粒子，从迁移到延迟的迁移。没有任何一种修正的渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口渡口。La sensibilite辅助指标environnementaux suggere这个一种我们可以得到一个plasticite comportementale qui s 'adapte辅助课程避暑地变化。
{"title":"Pacific Barrow's Goldeneye refine migratory phenology in response to overwintering temperatures and annual snowmelt","authors":"Jesse Kemp, W. Boyd, T. M. Forstner, D. Esler, T. Bowman, D. Douglas, Danica Hogan, M. Mcadie, Jonathan Thompson, Megan Willie, D. Green","doi":"10.1093/ornithology/ukad024","DOIUrl":"https://doi.org/10.1093/ornithology/ukad024","url":null,"abstract":"ABSTRACT Timing of seasonal bird migrations is broadly determined by internal biological clocks, which are synchronized by photoperiod, but individuals often refine their migratory timing decisions in response to external factors. Using 11 years of satellite telemetry data, we show that Pacific Barrow's Goldeneye (Bucephala islandica) at higher latitudes initiated spring and molt migrations later and fall migration earlier than individuals at lower latitudes. We further show that individuals refined migratory timing in response to interannual variation in environmental conditions. Individual Barrow's Goldeneye initiated spring migration earlier in years with warmer springs at their overwintering locations and concluded spring migration earlier in years with earlier annual snowmelt on their breeding grounds. Because individuals respond to conditions both where they initiate and where they conclude spring migration, our results suggest that Barrow's Goldeneye update their migratory decisions en route. For all 3 migrations in their annual cycle, birds delayed initiating migration if they had been captured and tagged prior to that migration. Birds that initiated migration late for their latitude were less likely to include a stopover and completed that migration faster, partially compensating for delayed departures. Our results are consistent with the hypothesis that Barrow's Goldeneye uses a combination of endogenous cues and environmental cues in migratory decision making. Sensitivity to environmental cues suggests that Barrow's Goldeneye may have behavioral plasticity that is adaptive when faced with ongoing climate change. LAY SUMMARY Migratory birds time their annual migrations to take advantage of temporal and spatial variation in resources, disease, and predation. Timing of these migrations is broadly determined by an internal biological clock set by day length, but individuals may refine when and how they migrate in response to environmental conditions. We used 11 years of satellite tracking data to investigate migratory cues in Barrow's Goldeneye, a species of sea duck. We found that birds used weather conditions as migratory cues, leaving their wintering grounds earlier in warmer springs and arriving on their breeding grounds earlier when the snow melted earlier in the year. Because individuals respond to conditions both where they start and where they end spring migration, our results suggest that Barrow's Goldeneye update their migratory decisions during migration. Barrow's Goldeneye's ability to respond to environmental cues suggests that they may be able to adapt to ongoing climate change. RÉSUMÉ Le calendrier des migrations saisonnières des oiseaux est largement déterminé par les horloges biologiques internes, qui sont synchronisées par la photopériode, mais les individus affinent souvent leurs décisions en matière de calendrier migratoire en réponse à des facteurs externes. En utilisant 11 années de données de télémétrie par satellite","PeriodicalId":19617,"journal":{"name":"Ornithology","volume":"173 1","pages":"1 - 13"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79552917","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}
Pub Date : 2023-05-09DOI: 10.1093/ornithology/ukad015
M. Lein, S. Sealy, J. Duncan
{"title":"Robert William Nero, 1922–2023","authors":"M. Lein, S. Sealy, J. Duncan","doi":"10.1093/ornithology/ukad015","DOIUrl":"https://doi.org/10.1093/ornithology/ukad015","url":null,"abstract":"","PeriodicalId":19617,"journal":{"name":"Ornithology","volume":"18 1","pages":"1 - 3"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73833699","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}
Pub Date : 2023-05-04DOI: 10.1093/ornithology/ukad022
Emily N Ostrow, Therese A. Catanach, J. Bates, A. Aleixo, J. Weckstein
ABSTRACT We reconstruct the species-level phylogenetic relationship among toucans, toucan-barbets, New World barbets using phylogenomic data to assess the monophyly and relationships at the family, generic, and specific levels. Our analyses confirmed (1) the monophyly of toucans (Aves: Ramphastidae), toucan-barbets (Aves: Semnornithidae), and New World barbets (Aves: Capitonidae) and that the toucan-barbets are sister to the toucans, an arrangement suggested, but poorly supported, in previously published phylogenies; (2) the paraphyly of lowland Selenidera toucanets with respect to Andigena mountain-toucans; and (3) evidence of some mitonuclear discordance, suggesting introgression or incomplete lineage sorting. For example, mitonuclear conflict in the phylogenetic placement of Ramphastos vitellinus subspecies suggests that Amazonian populations of Ramphastos vitellinus ariel may have introgressed mitogenomes derived from other Amazonian vitellinus taxa. To reconstruct the phylogenetic history of toucans, toucan-barbets, and New World barbets, we included all species-level taxa from the three families, with the addition of outgroups from the two major clades of Old World barbets (Megalaimidae and Lybiidae). We analyzed a combination of UCE sequences and whole mitochondrial genome sequences to reconstruct phylogenetic trees. LAY SUMMARY We analyzed relationships between all toucans, toucan-barbets, and New World barbets using both nuclear and mitochondrial DNA sequence data. We found highly supported relationships that showed that toucan-barbets are most closely related to toucans to the exclusion of New World barbets. Our results were consistent with previous research indicating that some Selenidera toucanets may be more closely related to Andigena mountain-toucans than they are to other Selenidera species. We found biologically relevant discordance between phylogenetic reconstructions using nuclear and mitochondrial data that give insight into potential historical introgression within Ramphastos. RESUMEN Reconstruimos la relación filogenética a nivel de especie entre tucanes, barbudos tucanes y barbudos del Nuevo Mundo utilizando datos filogenómicos para evaluar la monofilia y las relaciones a nivel de familia, género y especie. Nuestros análisis confirmaron (1) la monofilia de los tucanes (Aves: Ramphastidae), los barbudos tucanes (Aves: Semnornithidae) y los barbudos del Nuevo Mundo (Aves: Capitonidae), y que los barbudos tucanes son hermanos de los tucanes, un arreglo sugerido pero pobremente apoyado en filogenias publicadas anteriormente; (2) la parafilia de las tucanetas de las tierras bajas del género Selenidera en relación a los tucanes de montaña del género Andigena; y (3) la evidencia de alguna discordancia mitonuclear, lo que sugiere introgresión o clasificación incompleta de linajes. Por ejemplo, el conflicto mitonuclear en la ubicación filogenética de las subespecies de Ramphastos vitellinus sugiere que las poblaciones amazónicas de
摘要利用系统发育学数据，对巨嘴鸟、巨嘴鸟-巨嘴鸟、新大陆巨嘴鸟的系统发育关系进行了重建，并在科、属和特异水平上对其单系性和关系进行了评估。我们的分析证实了:(1)巨嘴鸟(鸟:Ramphastidae)、巨嘴鸟-barbets(鸟:Semnornithidae)和新大陆barbets(鸟:Capitonidae)的单系性，并且巨嘴鸟-barbets是巨嘴鸟的姐妹，这是先前发表的系统发育学中提出的一种安排，但缺乏支持;(2)低地巨嘴鸟相对于安地那山地巨嘴鸟的类群;(3)一些有丝核不一致的证据，表明渐渗或不完整的谱系分类。例如，在蓝褐豆亚种的系统发育定位上的有丝核冲突表明，亚马逊地区的蓝褐豆种群可能已经渗入了来自其他亚马逊地区黄褐豆类群的有丝核基因组。为了重建巨嘴鸟、巨嘴鸟-巨嘴鸟和新大陆巨嘴鸟的系统发育历史，我们包括了这三个科的所有种级分类群，并增加了旧大陆巨嘴鸟的两个主要分支(巨嘴鸟科和巨嘴鸟科)的外群。我们分析了UCE序列和全线粒体基因组序列的组合，重建了系统发育树。我们利用核和线粒体DNA序列数据分析了所有巨嘴鸟、巨嘴鸟-barbets和新大陆barbets之间的关系。我们发现了高度支持的关系，表明巨嘴鸟与巨嘴鸟最密切相关，而新世界的巨嘴鸟除外。我们的研究结果与以往的研究结果一致，表明某些硒鸟属巨嘴鸟与安地那山巨嘴鸟的亲缘关系可能比与其他硒鸟属物种的亲缘关系更密切。我们发现利用核和线粒体数据进行的系统发育重建之间存在生物学上的不一致，这有助于深入了解Ramphastos中潜在的历史渗入。resume重新分析relación纤维纤维瘤的遗传变异和特殊遗传变异，将纤维纤维瘤的遗传变异转化为新的遗传变异，将纤维纤维瘤的遗传变异转化为新的遗传变异，将纤维纤维瘤的遗传变异转化为新的遗传变异。filogenómicos新发现análisis证实(1)新发现的斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科)，斑点斑马鱼(斑马鱼科);(2)危地马拉境内的运输运输系统- 运输运输系统- 运输运输系统- 运输运输系统- montaña运输运输系统- Andigena;Y(3)海藻不一致的证据，有核的，不完整的证据introgresión或clasificación。比如el conflicto mitonuclear en la ubicacion filogenetica de las subespecies de Ramphastos vitellinus sugiere,拉斯维加斯poblaciones amazonicas de Ramphastos vitellinus ariel乙醇的惯常introgresion de mitogenos使用de其它分类单元vitellinus amazonicos。重建了墨西哥的烟草烟草史、墨西哥的烟草烟草史和新世界的烟草烟草史，包括墨西哥的烟草烟草史和新世界的烟草烟草史，特别是新世界的烟草烟草史，以及adición墨西哥的烟草烟草史和新世界的烟草烟草(巨型蝇蝇科和利比蝇科)。血液分析与combinación基因序列与线粒体序列的超保守性分析与árboles丝状基因的完全重建。
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Pub Date : 2023-04-27DOI: 10.1093/ornithology/ukad020
Kathryn M. Leonard, T. Williams
ABSTRACT Temperature, particularly within ∼1 month of egg laying, is thought to be an important, short-term cue used by female birds to calibrate timing of breeding to local conditions. Here, we show that a relatively broad, long-term, temperature window (January 2 to April 4, 92 days; r2 = 0.73) best predicted timing of egg laying in European Starlings (Sturnus vulgaris). A “mid-winter” temperature window was also strongly correlated with laying date (r2 = 0.58), but we found no support for an influence of short-term temperatures immediately before egg laying. We assessed the relationship between ambient temperature and timing of egg laying using three complimentary approaches: (1) an “unconstrained,” exploratory analysis; (2) a traditional sliding window approach; and (3) specific, biologically informed temperature windows. Our results contrast with the widely held view that short-term, prebreeding temperatures best predict variation in laying because they allow birds to adjust timing of breeding to local conditions around the time of egg laying. This means that mechanisms that allow integration of long-term temperature information must exist in birds—perhaps most parsimoniously involving indirect effects of temperature on growth of the bird's ectothermic insect prey—even though these are currently poorly characterized. LAY SUMMARY Temperature is thought to be an important “supplemental cue” used by female birds to time breeding. It is widely assumed that late spring temperatures, within ∼1 month of egg laying, are most predictive of laying date, consistent with the idea that this fine-tunes timing of breeding to year-specific local conditions at the time of laying. Here, we show, in European Starlings, that a relatively broad temperature window (January 2 to April 4) best predicts laying date and that a long-term “mid-winter” temperature window (January 8 to February 22) was also strongly correlated with laying date. We found no evidence that short-term, immediate prelaying temperatures predict laying date. These results contrast markedly with the widely held view that immediate, prebreeding temperatures best predict variation in timing of laying. Birds must have mechanisms that allow integration of long-term temperature information even though these are currently poorly characterized. RESUMEN La temperatura, particularmente dentro de aproximadamente el primer mes antes de la puesta de huevos, se cree que es una señal importante a corto plazo que utilizan las aves hembra para ajustar el momento de la reproducción a las condiciones locales. Aquí mostramos que una ventana de temperatura relativamente amplia a largo plazo (del 2 de enero al 4 de abril, 92 días; r2 = 0.73) predijo mejor el momento de la puesta de huevos en Sturnus vulgaris. Una ventana de temperatura de “mediados del invierno” también estuvo fuertemente correlacionada con la fecha de puesta (r2 = 0.58), pero no encontramos apoyo para una influencia de las temperaturas a corto plaz
温度，特别是产蛋后1个月内的温度，被认为是雌鸟根据当地条件校准繁殖时间的重要短期线索。在这里，我们展示了一个相对广泛、长期的温度窗口(1月2日至4月4日，92天;r2 = 0.73)最能预测欧洲椋鸟(Sturnus vulgaris)的产卵时间。“冬季中期”温度窗口也与产卵日期密切相关(r2 = 0.58)，但我们没有发现产蛋前的短期温度对其影响的支持。我们使用三种互补的方法来评估环境温度与产卵时间之间的关系:(1)“不受约束”的探索性分析;(2)传统的滑动窗方法;(3)特定的、生物知情的温度窗。我们的研究结果与人们普遍持有的观点相反，即短期的繁殖前温度最能预测产卵的变化，因为它们允许鸟类根据产卵时的当地条件调整繁殖时间。这意味着鸟类体内一定存在整合长期温度信息的机制——也许最简单的是温度对鸟类捕食的变温昆虫生长的间接影响——尽管这些机制目前还没有得到很好的描述。温度被认为是雌鸟用来确定繁殖时间的重要“补充线索”。人们普遍认为，晚春的温度，即产卵后1个月内的温度，最能预测产卵日期，这与产卵时根据当地特定年份的条件微调繁殖时间的观点一致。在这里，我们发现，在欧洲椋鸟中，相对较宽的温度窗口(1月2日至4月4日)最能预测产卵日期，而长期的“仲冬”温度窗口(1月8日至2月22日)也与产卵日期密切相关。我们没有发现短期的、即时的预埋温度可以预测铺设日期的证据。这些结果与广泛持有的观点形成鲜明对比，即直接的、繁殖前的温度最能预测产卵时间的变化。鸟类一定具有整合长期温度信息的机制，尽管这些信息目前尚不清楚。RESUMEN La temperatura尤其是dentro de aproximadamente el底漆mes在de La puesta de到了se克里族,一位senal重要的corto plazo, utilizan las鸟类hembra对位ajustar el纪念品de La reproduccion las的身体区域。Aquí mostramos que una ventana de temperature relativamente amplia a large plazo(1990年4月2日学报，días;r2 = 0.73) predijo major el momento de la puesta de huevos en Sturnus vulgaris。1 .关于"环境介质"的温度变化规律与"环境技术"之间的相互关系(r2 = 0.58)，关于"环境介质"的温度变化规律与"环境技术"之间的相互关系(r2 = 0.58)，关于"环境介质"的温度变化规律与"环境技术"之间的相互关系的影响(r2 = 0.58)。1 .利用“能源利用”的“动力”来评估“relación环境温度中心”和“3个互补点”:(1)通过análisis探索“限制”;(2) UN enfoque de ventana deslizante tradition;Y(3)温度表específicas, basadas en información biológica。都能resultados contrastan con la意见ampliamente aceptada德,las temperaturas corto plazo什么de la reproduccion儿子拉斯维加斯,药对predicen la variacion en la puesta因为permiten,拉斯维加斯鸟类ajusten el纪念品de la reproduccion一个拉斯维加斯的身体地区alrededor del纪念品de la puesta de到了。重要的是存在的机制是允许的机制是integración de la información温度的机制是一个大的平台是aves-quizás隐含的机制是más简约的效应是间接的机制是温度的机制是一个大的机制是están实际的动物特征。
{"title":"Long-term, not short-term, temperatures predict timing of egg laying in European Starling","authors":"Kathryn M. Leonard, T. Williams","doi":"10.1093/ornithology/ukad020","DOIUrl":"https://doi.org/10.1093/ornithology/ukad020","url":null,"abstract":"ABSTRACT Temperature, particularly within ∼1 month of egg laying, is thought to be an important, short-term cue used by female birds to calibrate timing of breeding to local conditions. Here, we show that a relatively broad, long-term, temperature window (January 2 to April 4, 92 days; r2 = 0.73) best predicted timing of egg laying in European Starlings (Sturnus vulgaris). A “mid-winter” temperature window was also strongly correlated with laying date (r2 = 0.58), but we found no support for an influence of short-term temperatures immediately before egg laying. We assessed the relationship between ambient temperature and timing of egg laying using three complimentary approaches: (1) an “unconstrained,” exploratory analysis; (2) a traditional sliding window approach; and (3) specific, biologically informed temperature windows. Our results contrast with the widely held view that short-term, prebreeding temperatures best predict variation in laying because they allow birds to adjust timing of breeding to local conditions around the time of egg laying. This means that mechanisms that allow integration of long-term temperature information must exist in birds—perhaps most parsimoniously involving indirect effects of temperature on growth of the bird's ectothermic insect prey—even though these are currently poorly characterized. LAY SUMMARY Temperature is thought to be an important “supplemental cue” used by female birds to time breeding. It is widely assumed that late spring temperatures, within ∼1 month of egg laying, are most predictive of laying date, consistent with the idea that this fine-tunes timing of breeding to year-specific local conditions at the time of laying. Here, we show, in European Starlings, that a relatively broad temperature window (January 2 to April 4) best predicts laying date and that a long-term “mid-winter” temperature window (January 8 to February 22) was also strongly correlated with laying date. We found no evidence that short-term, immediate prelaying temperatures predict laying date. These results contrast markedly with the widely held view that immediate, prebreeding temperatures best predict variation in timing of laying. Birds must have mechanisms that allow integration of long-term temperature information even though these are currently poorly characterized. RESUMEN La temperatura, particularmente dentro de aproximadamente el primer mes antes de la puesta de huevos, se cree que es una señal importante a corto plazo que utilizan las aves hembra para ajustar el momento de la reproducción a las condiciones locales. Aquí mostramos que una ventana de temperatura relativamente amplia a largo plazo (del 2 de enero al 4 de abril, 92 días; r2 = 0.73) predijo mejor el momento de la puesta de huevos en Sturnus vulgaris. Una ventana de temperatura de “mediados del invierno” también estuvo fuertemente correlacionada con la fecha de puesta (r2 = 0.58), pero no encontramos apoyo para una influencia de las temperaturas a corto plaz","PeriodicalId":19617,"journal":{"name":"Ornithology","volume":"11 7 1","pages":"1 - 10"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78297191","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}
Pub Date : 2023-04-27DOI: 10.1093/ornithology/ukad019
Sadie Claire Ranck, Christina M. Garsvo, D. Schwartz, Linda M. Reynard, M. Kohn, J. Heath
ABSTRACT Given increasing evidence that climate change affects the annual cycles of birds, it is important to understand the mechanisms underlying individual migration strategies and population-level patterns in partial migrants. In this study, we found that thermoregulation (body size and winter temperatures) was a key driver of American Kestrel (Falco sparverius) migration decisions. The annual proportion of migrants in the population, however, was not explained by winter weather and may be the result of differential survival. We measured stable hydrogen isotope values (δD) of talon tissues collected from 501 breeding and overwintering birds to distinguish migrant from resident kestrels in a partially migratory population of American Kestrels in southwestern Idaho in 2013–2021. We then evaluated drivers of migration decisions by assessing potential correlates of migration strategies, whether individuals switched migration strategies between years, and whether the proportion of migrants in the population changed over time or was correlated with winter weather. Male kestrels were 1.6 times more likely to migrate than females, and in colder than average winters, smaller birds of both sexes were more likely to migrate than larger birds. Only 27% of 26 recaptured individuals showed evidence of switching their migration strategies on an annual basis. There was no temporal trend in the proportion of migrants in the population, but proportions varied between years. Interestingly, there was no association between winter minimum temperature anomalies and annual migrant proportions in the population, suggesting that differential over-winter survival, or other stochastic processes, may play an important role in population composition. As winters continue to warm, fewer kestrels may migrate and more may remain resident on breeding grounds. However, it is unclear how changes in migration strategies might affect population-level patterns and resilience to climate change. LAY SUMMARY American Kestrels are the smallest falcon species in North America. Some individuals migrate South for the winter, while others stay on the breeding grounds year-round. It is unclear why some individuals migrate and others do not. We used the ratio of different mass variants of hydrogen in a small talon sample to determine whether a bird migrated or stayed on the breeding grounds for the winter. We found that smaller birds are more likely to migrate than larger birds, particularly in years with colder winter temperatures and that birds can change migration strategies from year to year. As winters continue to warm, fewer kestrels may migrate and more may remain resident on the breeding grounds. Potential changes in migration patterns may have important implications for monitoring kestrels at migration sites and for population resilience to climate change. RESUMEN Dada la creciente evidencia de que el cambio climático afecta los ciclos anuales de las aves, es importante comprender l
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Pub Date : 2023-04-26DOI: 10.1093/ornithology/ukad012
Leesia C. Marshall
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Pub Date : 2023-04-22DOI: 10.1093/ornithology/ukad018
J. Klicka, Kevin L. Epperly, B. Smith, G. Spellman, Jaime A. Chaves, Patricia Escalante, C. Witt, Ricardo Canales-Del-Castillo, R. Zink
ABSTRACT We explored the evolutionary radiation in the House Wren complex (Troglodytes aedon and allies), the New World's most widely distributed passerine species. The complex has been the source of ongoing taxonomic debate. To evaluate phenotypic variation in the House Wren complex, we collected 81,182 single-nucleotide polymorphisms (SNPs) from restriction site associated loci (RADseq) and mitochondrial DNA (mtDNA) from samples representing the taxonomic and geographic diversity of the complex. Both datasets reveal deep phylogeographic structuring, with several topological discrepancies. The trees highlight the evolutionary distinctiveness of eastern and western T. aedon, which were sister taxa in the SNP tree and paraphyletic on the mtDNA tree. The RADseq data reveal a distinct T. a. brunneicollis group, although STRUCTURE plots suggest admixture between western T. aedon and northern Mexican samples of T. a. brunneicollis. MtDNA data show a paraphyletic arrangement of T. a. musculus on the tree, whereas the SNP tree portrays them as monophyletic. Island taxa are distinct in both datasets, including T. a. beani (Isla Cozumel), which appears derived from T. a. musculus in eastern Mexico, and T. sissonii (Isla Socorro) and T. tanneri (Isla Clarión) although the 2 datasets disagree on their overall phylogenetic placement. Although we had only mtDNA data for T. a. martinicensis from the Lesser Antilles, we found at least 4 distinct and paraphyletic taxa from Trinidad, Granada, St. Vincent islands, and Dominica. The House Wren complex showed strong differentiation in mtDNA and RADseq datasets, with conflicting patterns likely arising from some combination of sex-biased dispersal, incomplete lineage sorting, or selection on mtDNA. The most glaring discrepancies between these 2 datasets, such as the paraphyly of eastern and western North American House Wrens in the mtDNA tree, present excellent opportunities for follow-up studies on evolutionary mechanisms that underpin phylogeographic patterns. LAY SUMMARY The House Wren (Troglodytes) complex consists of at least 5 distinct evolutionary groups distributed from Canada to southern South America. Morphological variation led taxonomists to name over 25 subspecies. We used mitochondrial DNA (mtDNA; 349 individuals) and a genome-wide survey of single nucleotide polymorphisms (RADseq; 184 individuals) to evaluate evolutionary patterns and determine their relationship to current taxonomy. The mtDNA data showed considerable differentiation, especially in island forms T. sissonii (Isla Socorro), T. a. beani (Isla Cozumel), and T. tanneri (Isla Clarión), and T. martinicensis, the latter of which includes several clades that were not monophyletic. MtDNA suggested that eastern and western samples of T. aedon were not monophyletic, whereas they were in the RADseq analyses; the cause of the discordance is unclear. We suggest that the RADseq data provide the most appropriate basis for classification and understandi
摘要:本文研究了新世界分布最广的雀形目鹪鹩群(穴居人)的进化辐射。这个复合体一直是分类学争论的源头。为了评估House Wren复合体的表型变异，我们从代表该复合体分类和地理多样性的样品中收集了81,182个限制性内切位点相关位点(RADseq)和线粒体DNA (mtDNA)的单核苷酸多态性(snp)。两个数据集揭示了深层的系统地理结构，有几个拓扑差异。这些树突出了东、西伊don在SNP树上是姐妹类群，在mtDNA树上是副类群的进化独特性。RADseq数据揭示了一个独特的布氏绦虫群，尽管结构图表明西部伊东伊氏绦虫和墨西哥北部布氏绦虫样本之间存在混合。MtDNA数据显示，在树上的T. a. musus是一种副系排列，而SNP树将它们描绘为单系排列。岛屿分类群在两个数据集中都是不同的，包括T. a. beani (Isla Cozumel)，它似乎起源于墨西哥东部的T. a. musculus, T. sissonii (Isla Socorro)和T. tanneri (Isla Clarión)，尽管两个数据集在它们的整体系统发育位置上存在分歧。虽然我们只有来自小安的列斯群岛的马提尼猿人的mtDNA数据，但我们在特立尼达、格拉纳达、圣文森特群岛和多米尼加发现了至少4个不同的类群。House Wren复合物在mtDNA和RADseq数据集中表现出强烈的分化，其相互冲突的模式可能是由性别偏向的分散、不完整的谱系分类或mtDNA选择的某种组合引起的。这两个数据集之间最明显的差异，例如北美东西部鹪鹩在mtDNA树中的部分差异，为后续研究支持系统地理模式的进化机制提供了极好的机会。家鹪鹩(穴居人)群由至少5个不同的进化类群组成，分布在加拿大到南美洲南部。形态变异使分类学家命名了超过25个亚种。我们使用线粒体DNA (mtDNA;349个个体)和单核苷酸多态性全基因组调查(RADseq;184个个体)来评估进化模式并确定它们与当前分类学的关系。mtDNA数据显示出相当大的分化，特别是在岛型T. sissonii (Isla Socorro)， T. a. beani (Isla Cozumel)， T. tanneri (Isla Clarión)和T. martinicensis中，后者包括几个非单系的分支。MtDNA表明，东、西部的伊don T. aedon样本不是单系的，而在RADseq分析中它们是单系的;这种不一致的原因尚不清楚。RADseq数据为家鹪鹩的分类和进化提供了最合适的基础，并显示出高度的系统地理分化和支持这些分类类群:东部和西部的aedon、T. sissonii、T. tanneri、T. beani和T. musculus。RESUMEN Exploramos la radiación evolutiva en el complexjo de Troglodytes aedon y sus aliados, la especie de pasereforme más ampliamente distribuida en el Nuevo Mundo。El complexjo ha sido object to de un debate taxonómico continuo。Para evaluar la variación fenotípica en este complexjo, recolectamos 81.182 polimorfismos de nucleótidos únicos (PNUs) de loci asciados a sitios de restricción (SRAseq) y ADN mitocondrial (ADNmt) de muestras que代表la diversidad taxonómica y geográfica del complexjo。Ambos conjuntos de datos revelan una estructuración filogeográfica profunda, con varias discrepancias topológicas。Los árboles resaltan la distinción evolutiva de T. aedon del este by del este, que fueron taxones hermanos en el árbol de PNUs by parafilsamicos en el árbol de ADNmt。在此基础上，研究人员发现了一组特殊的数据，并将其命名为<s:1>结构研究中心(<s:1>结构研究中心)，并将其命名为<s:1>结构研究中心(<s:1>结构研究中心)和<s:1>结构研究中心(<s:1>结构研究中心)。ADNmt muestran的数据显示，在T. a. musus的数据显示，在T. a. musus的数据显示，在T. a. musus的数据显示，在T. a. musus的数据显示，在T. a. musus的数据显示。岛屿分类有不同的数据汇总分类，包括:1 . a. beani(科苏梅尔岛)、1 . a. musculus(科苏梅尔岛)、1 . T. sissonii(索科罗岛)和1 . tanneri (Clarión岛)、1 . d .数据汇总分类están和2 . posición filogenacimtica general。特立尼达、格拉纳达、圣维森特群岛和多米尼加的4个不同的类群(特立尼达、格拉纳达、圣维森特群岛和多米尼加)。El complexjo de T。 aedon在mtdna和SRAseq数据集上表现出强烈的分化，冲突的模式可能是mtdna中性别偏见分散或选择的组合造成的。之间的显著差异,这两个数据集,如t . aedon个人性欲倒错的东部和西部北美在ADNmt树,可以借此机会研究后续filogeográficos模式基础的进化机制。
{"title":"Lineage diversity in a widely distributed New World passerine bird, the House Wren","authors":"J. Klicka, Kevin L. Epperly, B. Smith, G. Spellman, Jaime A. Chaves, Patricia Escalante, C. Witt, Ricardo Canales-Del-Castillo, R. Zink","doi":"10.1093/ornithology/ukad018","DOIUrl":"https://doi.org/10.1093/ornithology/ukad018","url":null,"abstract":"ABSTRACT We explored the evolutionary radiation in the House Wren complex (Troglodytes aedon and allies), the New World's most widely distributed passerine species. The complex has been the source of ongoing taxonomic debate. To evaluate phenotypic variation in the House Wren complex, we collected 81,182 single-nucleotide polymorphisms (SNPs) from restriction site associated loci (RADseq) and mitochondrial DNA (mtDNA) from samples representing the taxonomic and geographic diversity of the complex. Both datasets reveal deep phylogeographic structuring, with several topological discrepancies. The trees highlight the evolutionary distinctiveness of eastern and western T. aedon, which were sister taxa in the SNP tree and paraphyletic on the mtDNA tree. The RADseq data reveal a distinct T. a. brunneicollis group, although STRUCTURE plots suggest admixture between western T. aedon and northern Mexican samples of T. a. brunneicollis. MtDNA data show a paraphyletic arrangement of T. a. musculus on the tree, whereas the SNP tree portrays them as monophyletic. Island taxa are distinct in both datasets, including T. a. beani (Isla Cozumel), which appears derived from T. a. musculus in eastern Mexico, and T. sissonii (Isla Socorro) and T. tanneri (Isla Clarión) although the 2 datasets disagree on their overall phylogenetic placement. Although we had only mtDNA data for T. a. martinicensis from the Lesser Antilles, we found at least 4 distinct and paraphyletic taxa from Trinidad, Granada, St. Vincent islands, and Dominica. The House Wren complex showed strong differentiation in mtDNA and RADseq datasets, with conflicting patterns likely arising from some combination of sex-biased dispersal, incomplete lineage sorting, or selection on mtDNA. The most glaring discrepancies between these 2 datasets, such as the paraphyly of eastern and western North American House Wrens in the mtDNA tree, present excellent opportunities for follow-up studies on evolutionary mechanisms that underpin phylogeographic patterns. LAY SUMMARY The House Wren (Troglodytes) complex consists of at least 5 distinct evolutionary groups distributed from Canada to southern South America. Morphological variation led taxonomists to name over 25 subspecies. We used mitochondrial DNA (mtDNA; 349 individuals) and a genome-wide survey of single nucleotide polymorphisms (RADseq; 184 individuals) to evaluate evolutionary patterns and determine their relationship to current taxonomy. The mtDNA data showed considerable differentiation, especially in island forms T. sissonii (Isla Socorro), T. a. beani (Isla Cozumel), and T. tanneri (Isla Clarión), and T. martinicensis, the latter of which includes several clades that were not monophyletic. MtDNA suggested that eastern and western samples of T. aedon were not monophyletic, whereas they were in the RADseq analyses; the cause of the discordance is unclear. We suggest that the RADseq data provide the most appropriate basis for classification and understandi","PeriodicalId":19617,"journal":{"name":"Ornithology","volume":"28 1","pages":"1 - 13"},"PeriodicalIF":0.0,"publicationDate":"2023-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81160233","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}
Pub Date : 2023-04-19DOI: 10.1093/ornithology/ukad016
Jenevieve E Norton, E. DuVal
ABSTRACT Nest-site selection influences the survival of care-giving parents and their offspring, but search costs and site availability may limit site choices. Returning to previous nest sites may reduce costs and allow parents to better avoid local predators or access familiar resources. We investigated nest-site fidelity in the Lance-tailed Manakin (Chiroxiphia lanceolata), in which long-lived females raise offspring without male assistance, and found that site choices are responsive to past success but do not predict future outcomes. We compared georeferenced nest locations for the same females detected in consecutive years (245 comparisons for 138 females) and females nesting repeatedly within a year (137 comparisons for 97 females). Females were faithful to nesting sites in 13.9% of comparisons across years and 10.2% within years, and were more likely to nest again in the same site if their offspring fledged. When switching sites, females moved farther if their previous nest failed. Nest-site fidelity was unrelated to mate fidelity or female age. We then assessed whether site choice related to subsequent female survival, nest timing, or nest survival. Contrary to the hypothesis that win-stay-lose-shift tactics improve subsequent nesting outcomes, we found females were no more likely to fledge chicks or survive to a later year after they reused nest sites. However, across years, site-faithful females nested earlier on average than females that switched sites. Early nests were more likely to fledge chicks, and early-nesting females were more likely to renest when their first nesting effort was complete. Win-stay-lose-shift tactics may allow females to avoid areas where predation is likely, but new nest sites are not safer. Females that reuse nest sites benefit from early nest initiation, which both correlates with immediate success and creates potential for longer-term benefits of fidelity through increased opportunities to renest throughout the breeding season. LAY SUMMARY When females make repeated choices about where to build nests, they sometimes choose to nest in the same place, but it is unclear how this affects success. We used 19 years of information on the nest locations of individually banded female Lance-tailed Manakins to investigate why females renest at the same sites, and whether this behavior improves female survival or fledging success of the subsequent offspring. Females were more likely to reuse nest-sites if the prior nest was successful, but doing so did not improve offspring success or female survival. Females that reused nest locations laid eggs nearly 2 weeks earlier, on average, than females that switched sites, and chicks in early nests were more likely to fledge. Benefits of site fidelity come from indirect effects on nest timing, rather than from avoiding predators or securing successful sites for offspring. RESUMEN La selección del sitio de anidación influye en la supervivencia de los progenitores que brindan cuida
巢址选择影响育巢父母及其后代的生存，但搜索成本和巢址可用性可能限制巢址选择。回到以前的巢穴可以降低成本，让父母更好地避开当地的捕食者或获得熟悉的资源。我们调查了长尾马纳金(Chiroxiphia lanceolata)的巢址保真度，在这种情况下，长寿的雌性在没有雄性帮助的情况下抚养后代，发现巢址选择对过去的成功有反应，但不能预测未来的结果。我们比较了连续几年检测到的相同雌鸟的地理参考筑巢位置(138只雌鸟245次比较)和一年内重复筑巢的雌鸟(97只雌鸟137次比较)。在多年比较中，有13.9%的雌性忠于筑巢地点，10.2%的雌性在几年内忠于筑巢地点，如果它们的后代羽翼丰满，雌性更有可能在同一地点筑巢。换巢时，如果之前的巢失败了，雌性会搬到更远的地方。巢址忠诚度与配偶忠诚度或雌性年龄无关。然后，我们评估了地点选择是否与随后的雌性生存、筑巢时间或巢穴生存有关。与“赢-留-输-换”策略会改善后续筑巢结果的假设相反，我们发现雌性在重复使用巢穴后，不太可能孵出小鸡或活到更晚的一年。然而，多年来，忠实于筑巢地点的雌性平均比改变筑巢地点的雌性更早筑巢。早期筑巢的雏鸟更有可能羽翼丰满，而早期筑巢的雌性在第一次筑巢完成后更有可能休息。赢，留，输，换的策略可以让雌性避开可能被捕食的区域，但是新的巢穴并不安全。重复使用巢穴的雌性从早期的筑巢中受益，这既与即时的成功相关，又通过在整个繁殖季节增加休息的机会，为忠诚创造了长期利益的潜力。当雌性反复选择在哪里筑巢时，它们有时会选择在同一个地方筑巢，但目前还不清楚这是如何影响成功的。我们使用了19年的关于单独带的雌性长尾马纳金的巢穴位置的信息来研究为什么雌性在同一地点筑巢，以及这种行为是否能提高雌性的存活率或后代的羽化成功率。如果前一个巢穴成功，雌性更有可能重复使用巢穴，但这样做并不能提高后代的成功率或雌性的存活率。重复使用筑巢地点的雌鸟比更换筑巢地点的雌鸟平均早两周下蛋，而且在早期筑巢的雏鸟更容易羽化。地点保真度的好处来自于对筑巢时间的间接影响，而不是躲避捕食者或为后代确保成功的地点。RESUMEN La seleccion del sitio de anidacion influye en La supervivencia de los祖,brindan小心y de sus cria佩罗洛杉矶costos de La disponibilidad busqueda y del sitio含量limitar La由于de sitio。对anidación前代的回归和损失情况，可以通过允许不同的损失前代(即使是主要的损失前代)来降低损失成本。研究了杉木线虫线虫的生长情况anidación，特别是杉木线虫的生长情况crían，杉木线虫的生长情况crían，杉木线虫的生长情况crían，杉木线虫的生长情况，杉木线虫的生长情况，以及杉木线虫的生长情况，没有预测杉木线虫的生长情况。比较数据与数据与数据之间的关系，比较数据与数据与数据之间的关系，比较数据与数据与数据之间的关系，比较数据与数据与数据之间的关系，比较数据与数据与数据之间的关系，比较数据与数据与数据之间的关系。Las hembras fueron油田和los情况分别为anidación和el13 . 9%和el10 . 9%和el10 . 9%和el10 . 2%。el10 . 2%和el10 . 2%和el10 . 2%。Al cambiar de position, las hembras se alejaron más si su nido anterior fracasó。“忠诚的立场”anidación与“忠诚的立场”“忠诚的立场”“忠诚的立场”“忠诚的立场”“忠诚的立场”。Luego evaluamos si la elección del sitio se relacionó con la susecuente supervivencia de las hembras, el moment de anidación o la supervivencia del nido。与此相反的是，hipótesis与tácticas相比，更永久的，更完整的，更完整的，更完整的，更完整的，更完整的，更完整的，更完整的，更完整的，更完整的，更完整的，更完整的，更完整的，更完整的，更完整的，更完整的。在禁运期间，一个大型的los años, las hembras fieles所有的位置和idaron的位置都是promedio que las hembras que cambiaron de sito。 早期的鸟巢更有可能让雏鸟羽化，而早期筑巢的雌性在完成第一次筑巢后更有可能再次筑巢。赢-留-输-换的策略可以让雌性避开它们可能被捕食的地区，但新的筑巢地点并不安全。重复使用筑巢地点的雌性受益于早期开始筑巢，这与立即的成功相关，并通过增加在同一繁殖季节再次筑巢的机会，创造了潜在的长期忠诚收益。
{"title":"Causes and consequences of nest-site fidelity in a tropical lekking bird: Win-stay-lose-shift tactics are unrelated to subsequent success, but site-faithful females nest earlier","authors":"Jenevieve E Norton, E. DuVal","doi":"10.1093/ornithology/ukad016","DOIUrl":"https://doi.org/10.1093/ornithology/ukad016","url":null,"abstract":"ABSTRACT Nest-site selection influences the survival of care-giving parents and their offspring, but search costs and site availability may limit site choices. Returning to previous nest sites may reduce costs and allow parents to better avoid local predators or access familiar resources. We investigated nest-site fidelity in the Lance-tailed Manakin (Chiroxiphia lanceolata), in which long-lived females raise offspring without male assistance, and found that site choices are responsive to past success but do not predict future outcomes. We compared georeferenced nest locations for the same females detected in consecutive years (245 comparisons for 138 females) and females nesting repeatedly within a year (137 comparisons for 97 females). Females were faithful to nesting sites in 13.9% of comparisons across years and 10.2% within years, and were more likely to nest again in the same site if their offspring fledged. When switching sites, females moved farther if their previous nest failed. Nest-site fidelity was unrelated to mate fidelity or female age. We then assessed whether site choice related to subsequent female survival, nest timing, or nest survival. Contrary to the hypothesis that win-stay-lose-shift tactics improve subsequent nesting outcomes, we found females were no more likely to fledge chicks or survive to a later year after they reused nest sites. However, across years, site-faithful females nested earlier on average than females that switched sites. Early nests were more likely to fledge chicks, and early-nesting females were more likely to renest when their first nesting effort was complete. Win-stay-lose-shift tactics may allow females to avoid areas where predation is likely, but new nest sites are not safer. Females that reuse nest sites benefit from early nest initiation, which both correlates with immediate success and creates potential for longer-term benefits of fidelity through increased opportunities to renest throughout the breeding season. LAY SUMMARY When females make repeated choices about where to build nests, they sometimes choose to nest in the same place, but it is unclear how this affects success. We used 19 years of information on the nest locations of individually banded female Lance-tailed Manakins to investigate why females renest at the same sites, and whether this behavior improves female survival or fledging success of the subsequent offspring. Females were more likely to reuse nest-sites if the prior nest was successful, but doing so did not improve offspring success or female survival. Females that reused nest locations laid eggs nearly 2 weeks earlier, on average, than females that switched sites, and chicks in early nests were more likely to fledge. Benefits of site fidelity come from indirect effects on nest timing, rather than from avoiding predators or securing successful sites for offspring. RESUMEN La selección del sitio de anidación influye en la supervivencia de los progenitores que brindan cuida","PeriodicalId":19617,"journal":{"name":"Ornithology","volume":"36 1","pages":"1 - 13"},"PeriodicalIF":0.0,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76248634","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}
Pub Date : 2023-04-08DOI: 10.1093/ornithology/ukad014
G. Semenov, Claire M Curry, M. Patten, J. Weir, Scott A. Taylor
ABSTRACT We studied hybridization between the Black-crested and Tufted titmouse across two geographically distinct transects that differ in the timing of secondary contact by hundreds to thousands of years. We found that hybridization patterns correspond to localized hybrid swarms and that the titmouse hybrid zone is likely slowly expanding over time, a product of short post-natal dispersal distances coupled with weak or absent selection against admixture. We show the southern part of the hybrid zone located in Texas is four times wider than the northern region of hybridization in Oklahoma, which is likely due to geographic differences in hybrid zone age. Despite differences in width, most individuals in both transects are advanced-generation hybrids and backcrosses, suggesting geographically consistent hybridization dynamics. We documented a strong correlation between genotypes and plumage index, suggesting that hybridization has not yet resulted in the decoupling of plumage and genome-wide ancestry as observed in some other avian hybrid zones. Although our results suggest the ongoing expansion of the hybrid zone, the rate of expansion appears to be slow, on the scale of tens of meters a year, and it will likely take hundreds of thousands to millions of years before homogenization of the parental populations. While we did not find support for partial reproductive isolation in the hybrid zone itself, there is the possibility that ecological or sexual selection limits introgression into allopatric regions. Broadly, the results of our study highlight the value of multiple, geographically distant, transects across a hybrid zone for assessing the evolutionary dynamics of hybridizing lineages. LAY SUMMARY We studied hybridization patterns between Black-crested and Tufted titmice in two areas of their contact zone that differ in the age of onset of hybridization by hundreds or thousands of years. We show that northern (younger) parts of the hybrid zone have a genetic transition four times narrower than the southern (older) region, which plausibly reflects the differences in the hybrid zone age or is a result of differences in the breadth of the ecotone between titmouse habitats in the north and south. Our results suggest that the Black-crested and Tufted titmouse hybrid zone might be in the process of slowly expanding following selectively neutral hybridization dynamics, although we cannot completely rule out a possible role of ecological or sexual selection in limiting gene flow outside of the hybrid zone. RESUMEN Estudiamos la hibridación entre Baeolophus atricristatus y B. bicolor a través de dos transectos geográficamente distintos que difieren en el momento del contacto secundario por cientos a miles de años. Encontramos que los patrones de hibridación corresponden a enjambres híbridos localizados y que la zona híbrida de Baeolophus probablemente se está expandiendo lentamente con el tiempo, producto de distancias cortas de dispersión postnatal, j
摘要:我们研究了黑冠山雀和簇毛山雀在两个地理上不同的样带上的杂交，这些样带的二次接触时间相差数百至数千年。我们发现杂交模式对应于局部杂交群体，并且山雀杂交区可能随着时间的推移而缓慢扩大，这是出生后较短的扩散距离加上对混合的弱或不存在选择的产物。我们发现，位于德克萨斯州的杂交带的南部比俄克拉何马州杂交带的北部宽4倍，这可能是由于杂交带年龄的地理差异。尽管在宽度上存在差异，但两个样带中的大多数个体都是高级杂交和回交，这表明杂交动态在地理上是一致的。我们记录了基因型与羽毛指数之间的强相关性，这表明杂交尚未导致羽毛与全基因组祖先的脱钩，这在其他一些鸟类杂交区观察到。虽然我们的研究结果表明杂交带正在不断扩大，但扩张的速度似乎很慢，每年只有几十米的规模，而且可能需要数十万到数百万年的时间才能使亲本种群同质化。虽然我们没有在杂交区本身找到部分生殖隔离的支持，但有可能生态或性选择限制了向异域地区的渗入。总的来说，我们的研究结果强调了跨杂交区多个地理上遥远的样带的价值，以评估杂交谱系的进化动力学。摘要:我们研究了黑冠山雀和簇毛山雀在接触带的两个不同区域的杂交模式，这些区域的杂交开始年龄相差数百年或数千年。我们发现，杂交带的北部(年轻)部分的遗传过渡比南部(较老)区域窄4倍，这似乎反映了杂交带年龄的差异，或者是南北山雀栖息地之间过渡带宽度差异的结果。我们的研究结果表明，黑冠山雀和簇毛山雀杂交区可能处于选择性中性杂交动力学的缓慢扩展过程中，尽管我们不能完全排除生态选择或性选择在限制杂交区外基因流动方面的可能作用。RESUMEN Estudiamos la hibridación entre Baeolophus atriristatus by B. bicolor a travacos de dos transsectos geográficamente disttos que differen en menento del contact second - ario pous cientos a miles de años。与通讯和通讯和通讯和通讯和híbrida区域的联系联系在一起，与通讯和híbrida区域的联系联系在一起，与通讯和dispersión产后的联系联系在一起，与通讯和selección通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和通讯和/或在德克萨斯州的北部和北部，在德克萨斯州的北部和北部，在德克萨斯州的北部和北部的北部，在德克萨斯州的北部和北部的北部，在德克萨斯州的北部和北部，在当地的可能的情况下，可能会有一个差异geográficas在北部和北部的北部地区。一个人从不同的角度出发，从不同的角度出发，从不同的角度出发，从不同的角度出发，从不同的角度出发，从不同的角度出发，从不同的角度出发，从不同的角度出发，从不同的角度出发，从不同的角度出发。文献资料(correlación)和文献资料(índice de plumaje)、文献资料(hibridación aún)和文献资料(hibridación aún)都表明，文献资料(遗传学)和文献资料(遗传学)都表明，文献资料(遗传学)和文献资料(遗传学)都表明，文献资料(遗传学)和文献资料(遗传学)都表明，文献资料(遗传学)和文献资料(遗传学)都表明，文献资料(遗传学)和文献资料(遗传学)都表明，文献资料(遗传学)和文献资料(遗传学)都表明，文献资料(遗传学)和文献资料(遗传学)都表明，文献资料(遗传学)和文献资料(遗传学)都表明:híbridas de aves。unque nuestros resultdoos sugieren la expansión en curso de la zona híbrida, la tasa de expansión parece sermuy lenta, en la escala de decenas de metrop贫穷año, y probablemente to ar cientos de miles a million de años antes de la homogeneización de las polblaciones parentales。特别在一个区域híbrida和sí内，存在一个可能性，在一个区域selección ecológica或在一个区域alopátricas内存在性限制的可能性。发表的terminos,洛杉矶resultados de都工厂化destacan el英勇de倍数transectos geograficamente遥远traves de una带hibrida对位evaluar las dinamicas evolutivas de linajes hibridizantes。
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