Pub Date : 2022-01-01DOI: 10.5751/ace-02326-170238
Frank B. Baldwin, R. Alisauskas, J. Leafloor
,
，
{"title":"Dynamics of pre-breeding nutrient reserves in subarctic staging Lesser Snow Geese (Anser caerulescens caerulescens) and Ross’s Geese (Anser rossii): implications for reproduction","authors":"Frank B. Baldwin, R. Alisauskas, J. Leafloor","doi":"10.5751/ace-02326-170238","DOIUrl":"https://doi.org/10.5751/ace-02326-170238","url":null,"abstract":",","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.5751/ace-02237-170217
M. Bakermans, Joshua M. Driscoll, A. Vitz
{"title":"Habitat selection and site fidelity on winter home ranges of Eastern Whip-poor-wills (Antrostomus vociferus)","authors":"M. Bakermans, Joshua M. Driscoll, A. Vitz","doi":"10.5751/ace-02237-170217","DOIUrl":"https://doi.org/10.5751/ace-02237-170217","url":null,"abstract":"","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.5751/ace-02013-170104
Camille Bégin-Marchand, F. Gagnon, B. Drolet, J. Ibarzabal, J. Tremblay
The study of migratory songbird transition periods, such as the post-breeding period, is complex because birds undertake different types of movements that vary in space and time. Nonetheless, it is important to understand the extent and duration of the territory and specific sites use to identify human activities likely to affect the species’ survival. Individuals from different regional populations may exhibit specific movements during the various phases of their annual cycle, and therefore conservation actions must be adapted. We studied a population of Canada Warblers (Cardellina canadensis) from the Saguenay region of Quebec, Canada, in the northeastern part of the species’ breeding range. We used a coordinated radio-telemetry network (Motus) to determine the residence time within the breeding territory, dates and times of departure, and early fall migration routes of 18 adult birds. We expected individuals to leave by mid-August and to migrate through the eastern flyway, along the Atlantic Coast. Six tracked individuals remained on their breeding territory until early September, corresponding to a residence time of approximately 90 days. These individuals left just after sunset on their day of departure. Twelve individuals departed earlier, and in the daytime, before the end of August; their earlier departure was likely for a purpose other than migration. Nine individuals were detected outside their breeding territory along the Atlantic migratory flyway: four migrated through the Great Lakes region, one in the Great Appalachian Valley, three along the Atlantic Coast or coastal plain, and one with an undetermined route. Our results suggest that adult Canada Warblers remain in the Saguenay region longer than expected, and that, although some individuals remain close to their breeding territory during the post-breeding period, others may use surrounding territories prior to initiating their fall migration. Our results will allow regional conservation managers to recommend that regional industry postpone the timing of certain activities that could negatively affect the species’ survival. Our study highlights the importance of fine-scale studies focused on specific periods of migratory songbird annual cycles to fill important knowledge gaps for understanding of the ecology of their species. Aperçu des déplacements post-nuptiaux de Parulines du Canada (Cardellina canadensis) issues d'une population du nord-est du pays RÉSUMÉ. L'étude des périodes de transition de passereaux migrateurs, comme la période post-nuptiale, est complexe car les oiseaux entreprennent différents types de déplacements qui varient dans l'espace et le temps. Néanmoins, il est important de comprendre l'étendue et la durée de l'utilisation du territoire et de sites spécifiques pour qu'on puisse déterminer quelles activités humaines sont susceptibles d'affecter la survie de l'espèce. Les individus de différentes populations régionales peuvent présenter des déplacements spécifiqu
对迁徙鸣禽过渡期(如繁殖后期)的研究是复杂的，因为鸟类在空间和时间上进行不同类型的运动。尽管如此，重要的是要了解领土的范围和持续时间，以及用于确定可能影响物种生存的人类活动的特定地点。来自不同区域种群的个体在其年周期的不同阶段可能表现出特定的运动，因此必须适应保护行动。我们研究了一个来自加拿大魁北克省萨格奈地区的加拿大林莺(Cardellina canadensis)种群，该种群位于该物种繁殖范围的东北部。利用协调无线电遥测网络(Motus)对18只成鸟在繁殖区内的停留时间、离开日期和时间以及初秋迁徙路线进行了测定。我们预计个体会在8月中旬离开，沿着大西洋海岸沿着东部的飞行路线迁徙。6只被追踪到的个体在它们的繁殖地停留到9月初，相当于大约90天的停留时间。这些人在出发当天的日落之后就离开了。在八月底之前，有十二个人在白天出发;他们早些时候离开可能不是为了移民。在大西洋迁徙路线上发现了9只在繁殖地之外的个体:4只在大湖地区迁徙，1只在大阿巴拉契亚山谷迁徙，3只在大西洋海岸或沿海平原迁徙，还有1只的迁徙路线尚未确定。我们的研究结果表明，成年加拿大林莺在萨格奈地区停留的时间比预期的要长，尽管一些个体在繁殖后期仍靠近其繁殖区域，但其他个体可能会在开始秋季迁徙之前使用周围的区域。我们的研究结果将允许区域保护管理者建议区域工业推迟可能对物种生存产生负面影响的某些活动的时间。我们的研究强调了专注于迁徙鸣禽年周期特定时期的精细尺度研究的重要性，以填补对其物种生态理解的重要知识空白。加拿大结婚后的人口统计资料(加拿大卡达林纳)和加拿大东北人口统计资料RÉSUMÉ。不同的擢升和擢升是指不同的擢升和擢升，不同的擢升和擢升是指不同的擢升和擢升。最重要的是，要理解这些因素，如:1 . <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1> <s:1>(或)3 . <s:1> <s:1> <s:1> <s:1> <s:1> <s:1>(或)3 . <s:1> <s:1> <s:1> <s:1>) 1 . <s:1> <s:1> <s:1> <s:1>(或)3 . <s:1> <s:1> <s:1>) 1 .人类不容易受到影响，不能影响到人类的生存。不同的个体，不同的群体，不同的个体，不同的个体，不同的个体，不同的个体，不同的个体，不同的个体，不同的个体，不同的个体，不同的个体，不同的个体，不同的个体，不同的个体，不同的个体，不同的个体。加拿大(加拿大卡德琳娜)在加拿大的萨格内与魁地奇的交换条件下，在魁地奇的交换条件下，在魁地奇的交换条件下，在魁地奇的交换条件下，在魁地奇的交换条件下进行交换。Nous avons utilisise (n .)和conous avons utilisise (n .)、conous avons utilisise (n .)和conous (n .)、conous (n .)、conous (n .)、conous (n .)、conous (n .)、conous (n .)、conous (n .)、conous (n .)、conous (n .)、conous (n .)、conous (n .)和conous (n .)。Nous Nous attence que les。6名个人于9月被拘留在美国境内，但未被拘留90小时。这些人不会放弃学业，他们只是在学习，学习，学习，学习，学习。以个人名义加上tôt, et de jour, avant la fin du mois d' aot;毫无疑问，移民是一种自由的生活方式。九个个体观察高频检测在此为了territoire de营巢le长de la voie de迁移de l 'Atlantique:四点migre par洛杉矶地区des的键盘虫胶,联合国在法兰des Appalaches三勒长de la cote“大西洋ou”de la plaine cotiere,等联合国不常识n pu限定词l 'itineraire工作。在加拿大，成年男子的个人身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份、成年男子的成年身份。没有任何一项调查显示，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都表明，所有的调查问卷都是正确的。 我们强调对候鸟年周期的特定时期进行精细规模研究的重要性，以填补对候鸟生态学理解的重大空白。
{"title":"Insights on post-breeding movements from a northeastern population of Canada Warblers (Cardellina canadensis)","authors":"Camille Bégin-Marchand, F. Gagnon, B. Drolet, J. Ibarzabal, J. Tremblay","doi":"10.5751/ace-02013-170104","DOIUrl":"https://doi.org/10.5751/ace-02013-170104","url":null,"abstract":"The study of migratory songbird transition periods, such as the post-breeding period, is complex because birds undertake different types of movements that vary in space and time. Nonetheless, it is important to understand the extent and duration of the territory and specific sites use to identify human activities likely to affect the species’ survival. Individuals from different regional populations may exhibit specific movements during the various phases of their annual cycle, and therefore conservation actions must be adapted. We studied a population of Canada Warblers (Cardellina canadensis) from the Saguenay region of Quebec, Canada, in the northeastern part of the species’ breeding range. We used a coordinated radio-telemetry network (Motus) to determine the residence time within the breeding territory, dates and times of departure, and early fall migration routes of 18 adult birds. We expected individuals to leave by mid-August and to migrate through the eastern flyway, along the Atlantic Coast. Six tracked individuals remained on their breeding territory until early September, corresponding to a residence time of approximately 90 days. These individuals left just after sunset on their day of departure. Twelve individuals departed earlier, and in the daytime, before the end of August; their earlier departure was likely for a purpose other than migration. Nine individuals were detected outside their breeding territory along the Atlantic migratory flyway: four migrated through the Great Lakes region, one in the Great Appalachian Valley, three along the Atlantic Coast or coastal plain, and one with an undetermined route. Our results suggest that adult Canada Warblers remain in the Saguenay region longer than expected, and that, although some individuals remain close to their breeding territory during the post-breeding period, others may use surrounding territories prior to initiating their fall migration. Our results will allow regional conservation managers to recommend that regional industry postpone the timing of certain activities that could negatively affect the species’ survival. Our study highlights the importance of fine-scale studies focused on specific periods of migratory songbird annual cycles to fill important knowledge gaps for understanding of the ecology of their species. Aperçu des déplacements post-nuptiaux de Parulines du Canada (Cardellina canadensis) issues d'une population du nord-est du pays RÉSUMÉ. L'étude des périodes de transition de passereaux migrateurs, comme la période post-nuptiale, est complexe car les oiseaux entreprennent différents types de déplacements qui varient dans l'espace et le temps. Néanmoins, il est important de comprendre l'étendue et la durée de l'utilisation du territoire et de sites spécifiques pour qu'on puisse déterminer quelles activités humaines sont susceptibles d'affecter la survie de l'espèce. Les individus de différentes populations régionales peuvent présenter des déplacements spécifiqu","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70960987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.5751/ace-02059-170105
J. Giroux, J. Rodrigue, R. W. Brook, M. Patenaude-Monette
Canada Geese (Branta canadensis) are an important wildlife food resource for Cree people living in communities along the James Bay coasts. According to Traditional Ecological Knowledge, environmental changes along the coast have affected hunting success. Also, changes in the relative abundance of different goose populations that use James Bay may affect hunting opportunities. The objective of our study was to use band recoveries to identify Canada Goose populations harvested by Eeyou Istchee Cree hunters in their Eastern James Bay territory between 2000 and 2020. A total of 744 band recoveries were reported including 198 from the Atlantic Population (AP), 82 from the Southern Hudson Bay Population (SHBP), 122 from the Atlantic Flyway Resident Population (AFRP), 339 from the Mississippi Flyway Giant Population (MFGP), and three that could not be assigned to a population. The percentage of banded geese that were recovered was three times greater for the AP than for the other three populations. Eighty-seven percent of recoveries were reported in spring and 72% were submitted by hunters from the two northern communities (Chisasibi and Wemindji). Most recoveries were reported from coastal hunting sites, but a greater proportion of banded geese of the AP were recovered inland compared to the other goose populations, an indication of their propensity to migrate inland. The most noticeable change in the goose harvest compared to the 1970s was the rapid increase of molt migrant temperate-breeding geese of the AFRP and MFGP. In addition to environmental changes along the James Bay east coast, changes in the relative abundance of each goose population may affect hunting success because each population is differently susceptible to hunting within the territory due to differences in migratory behavior. Our study demonstrates the usefulness of band recoveries in tracking these changes and we therefore encourage agencies to maintain banding programs and Cree hunters to report their recovered bands. Populations de Bernaches du Canada récoltées par les chasseurs Cris d'Eeyou Istchee dans l'est de la Baie James RÉSUMÉ. Les Bernaches du Canada (Branta canadensis) sont une ressource alimentaire importante pour les populations Cris vivant le long des côtes de la Baie James. Selon les connaissances écologiques traditionnelles, les changements environnementaux côtiers ont influencé le succès de chasse. Les changements dans l'abondance relative des différentes populations de bernaches qui utilisent la Baie James peuvent aussi avoir affecté les opportunités de chasse. L'objectif de notre étude était d'utiliser les retours de bagues pour identifier les populations de Bernaches du Canada récoltées par les chasseurs Cris d'Eeyou Istchee dans le territoire est de la Baie James entre 2000 et 2020. Un total de 744 retours de bagues a été rapporté incluant 198 de la population de l'Atlantique (AP), 82 de la population du sud de la Baie d'Hudson (SHBP), 122 de la population rési
{"title":"Canada Goose populations harvested in Eastern James Bay by Eeyou Istchee Cree hunters","authors":"J. Giroux, J. Rodrigue, R. W. Brook, M. Patenaude-Monette","doi":"10.5751/ace-02059-170105","DOIUrl":"https://doi.org/10.5751/ace-02059-170105","url":null,"abstract":"Canada Geese (Branta canadensis) are an important wildlife food resource for Cree people living in communities along the James Bay coasts. According to Traditional Ecological Knowledge, environmental changes along the coast have affected hunting success. Also, changes in the relative abundance of different goose populations that use James Bay may affect hunting opportunities. The objective of our study was to use band recoveries to identify Canada Goose populations harvested by Eeyou Istchee Cree hunters in their Eastern James Bay territory between 2000 and 2020. A total of 744 band recoveries were reported including 198 from the Atlantic Population (AP), 82 from the Southern Hudson Bay Population (SHBP), 122 from the Atlantic Flyway Resident Population (AFRP), 339 from the Mississippi Flyway Giant Population (MFGP), and three that could not be assigned to a population. The percentage of banded geese that were recovered was three times greater for the AP than for the other three populations. Eighty-seven percent of recoveries were reported in spring and 72% were submitted by hunters from the two northern communities (Chisasibi and Wemindji). Most recoveries were reported from coastal hunting sites, but a greater proportion of banded geese of the AP were recovered inland compared to the other goose populations, an indication of their propensity to migrate inland. The most noticeable change in the goose harvest compared to the 1970s was the rapid increase of molt migrant temperate-breeding geese of the AFRP and MFGP. In addition to environmental changes along the James Bay east coast, changes in the relative abundance of each goose population may affect hunting success because each population is differently susceptible to hunting within the territory due to differences in migratory behavior. Our study demonstrates the usefulness of band recoveries in tracking these changes and we therefore encourage agencies to maintain banding programs and Cree hunters to report their recovered bands. Populations de Bernaches du Canada récoltées par les chasseurs Cris d'Eeyou Istchee dans l'est de la Baie James RÉSUMÉ. Les Bernaches du Canada (Branta canadensis) sont une ressource alimentaire importante pour les populations Cris vivant le long des côtes de la Baie James. Selon les connaissances écologiques traditionnelles, les changements environnementaux côtiers ont influencé le succès de chasse. Les changements dans l'abondance relative des différentes populations de bernaches qui utilisent la Baie James peuvent aussi avoir affecté les opportunités de chasse. L'objectif de notre étude était d'utiliser les retours de bagues pour identifier les populations de Bernaches du Canada récoltées par les chasseurs Cris d'Eeyou Istchee dans le territoire est de la Baie James entre 2000 et 2020. Un total de 744 retours de bagues a été rapporté incluant 198 de la population de l'Atlantique (AP), 82 de la population du sud de la Baie d'Hudson (SHBP), 122 de la population rési","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70961332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.5751/ace-02146-170128
Rémi Torrenta, K. Hobson, Douglas C. Tozer, M. Villard
,
，
{"title":"Losing the edge: trends in core versus peripheral populations in a declining migratory songbird","authors":"Rémi Torrenta, K. Hobson, Douglas C. Tozer, M. Villard","doi":"10.5751/ace-02146-170128","DOIUrl":"https://doi.org/10.5751/ace-02146-170128","url":null,"abstract":",","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.5751/ace-02112-170119
Rachel Bratton, Henry D. Legett, Paula Shannon, Keenan Yakola, A. Gerson, M. Staudinger
A variety of seabird species migrate annually from wintering grounds in the Southern Hemisphere to the Gulf of Maine, USA to breed and raise their young. Post-migration, adult seabirds depend on the spatio-temporal match of reliable food resources to replenish energy reserves before breeding. However, the conditions during this critical window of time are becoming increasingly uncertain given the magnitude and pace at which climate change is impacting the Gulf of Maine region. We investigated the prebreeding foraging ecology of Arctic Terns (Sterna paradisaea), Common Terns (S. hirundo), and the federally endangered Roseate Tern (S. dougallii) by analyzing stable carbon (δC) and nitrogen (δN) isotopes in eggshell tissues collected from seven islands in the Gulf of Maine from 2016 to 2018. Results show at the interspecific level, adult foraging patterns are consistent with expectations based on chick diets. At interisland and interannual scales, variation in isotopic values and niche breadths suggest foraging habits are highly localized. Although uncertainty remains, interannual trends also suggest warmer ocean conditions are either affecting tern foraging behaviors and/or prey resource availability during the late spring and early summer. Overall, results provide new information on adult tern foraging ecology in an important breeding area experiencing rapid environmental change. Écologie de l'alimentation avant la reproduction de trois espèces de sternes nichant dans le golfe du Maine RÉSUMÉ. Diverses espèces d'oiseaux marins migrent chaque année des aires d'hivernage dans l'hémisphère Sud vers le golfe du Maine, aux États-Unis, pour s'y reproduire et élever leurs oisillons. Après la migration, les oiseaux marins adultes dépendent de la présence spatio-temporelle de ressources alimentaires fiables pour reconstituer leurs réserves énergétiques avant la nidification. Cependant, les conditions durant cette fenêtre critique deviennent de plus en plus incertaines étant donné l'ampleur et le rythme auxquels les changements climatiques affectent la région du golfe du Maine. Nous avons étudié l'écologie de l'alimentation avant la reproduction des Sternes arctique (Sterna paradisaea), pierregarin (S. hirundo) et de Dougall (S. dougallii) cette dernière étant une espèce menacée au niveau fédéral -, en analysant les isotopes stables du carbone (δ13C) et de l'azote (δ15N) dans les tissus de coquilles d'oeufs collectées sur sept îles du golfe du Maine de 2016 à 2018. À l'échelle interspécifique, les tendances de la recherche de nourriture par les adultes sont conformes aux attentes basées sur le régime alimentaire des poussins. Aux échelles inter-îles et interannuelles, la variation des valeurs isotopiques et de l'étendue des niches indiquent que les habitudes de recherche de nourriture sont très localisées. Bien que des incertitudes demeurent, les tendances interannuelles portent également à croire que les conditions océaniques plus chaudes affectent les com
各种各样的海鸟物种每年从南半球的越冬地迁徙到美国的缅因湾繁殖和抚养他们的后代。在迁徙后，成年海鸟依靠可靠的食物资源的时空匹配来补充能量储备，然后进行繁殖。然而，考虑到气候变化影响缅因湾地区的幅度和速度，这一关键时期的情况正变得越来越不确定。通过分析2016 - 2018年在缅因湾7个岛屿采集的蛋壳组织的稳定碳(δC)和氮(δN)同位素，研究了北极燕鸥(Sterna paradisaea)、普通燕鸥(S. hirundo)和联邦濒危物种红燕鸥(S. dougallii)的繁殖前觅食生态。结果表明，在种间水平上，成虫的觅食模式与基于雏鸟饮食的预期一致。在岛际和年际尺度上，同位素值和生态位宽度的变化表明觅食习惯是高度局域化的。尽管存在不确定性，但年际趋势也表明，在春末夏初，海洋环境变暖要么影响燕鸥的觅食行为，要么影响猎物资源的可用性。总体而言，研究结果提供了在一个环境快速变化的重要繁殖区成年燕鸥觅食生态的新信息。Écologie在缅因州的高尔夫球场上的三个人的营养和繁殖RÉSUMÉ。不同的职业生涯和职业生涯都有不同的职业生涯和职业生涯，例如职业生涯和职业生涯，职业生涯和职业生涯都有不同的职业生涯。在迁移的过程中，成年的个体与成年的个体之间存在着空间和时间上的差异，在资源和时间上存在着差异，在迁移的过程中，个体与成年个体之间存在着差异。独立的，没有条件的杜兰特·塞特fenêtre批评越轨的，没有条件的，不确定的，不确定的，不确定的，不确定的，不确定的，不确定的，不确定的，不确定的，不确定的，不确定的。研究人员发现， (Sterna paradisaea)、pierregarin (S. hirundo)和de Dougall (S. dougallii)、 (δ13C)和δ15N)同位素稳定的碳(δ13C)和碳(δ15N)同位素稳定的碳(δ13C)和 (δ15N)同位素稳定的碳(δ13C)、 (δ15N)和 (δ15N)收集的(2016年))。À成人间的营养研究趋势，成人间的营养研究趋势，成人间的营养研究趋势，成人间的营养研究趋势，成人间的营养研究趋势，成人间的营养研究趋势，成人间的营养研究趋势。在环间和环间，在价值同位素的变异方面，在生态位方面，在营养研究方面，在习惯方面，在营养研究方面，在区域方面。不确定因素与不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素、不确定因素和不确定因素。从总体上看，没有任何一种变异的变异是一种新的变异，没有任何一种变异的变异是一种新的变异，没有任何一种变异的变异，没有任何一种变异的变异。
{"title":"Pre-breeding foraging ecology of three tern species nesting in the Gulf of Maine","authors":"Rachel Bratton, Henry D. Legett, Paula Shannon, Keenan Yakola, A. Gerson, M. Staudinger","doi":"10.5751/ace-02112-170119","DOIUrl":"https://doi.org/10.5751/ace-02112-170119","url":null,"abstract":"A variety of seabird species migrate annually from wintering grounds in the Southern Hemisphere to the Gulf of Maine, USA to breed and raise their young. Post-migration, adult seabirds depend on the spatio-temporal match of reliable food resources to replenish energy reserves before breeding. However, the conditions during this critical window of time are becoming increasingly uncertain given the magnitude and pace at which climate change is impacting the Gulf of Maine region. We investigated the prebreeding foraging ecology of Arctic Terns (Sterna paradisaea), Common Terns (S. hirundo), and the federally endangered Roseate Tern (S. dougallii) by analyzing stable carbon (δC) and nitrogen (δN) isotopes in eggshell tissues collected from seven islands in the Gulf of Maine from 2016 to 2018. Results show at the interspecific level, adult foraging patterns are consistent with expectations based on chick diets. At interisland and interannual scales, variation in isotopic values and niche breadths suggest foraging habits are highly localized. Although uncertainty remains, interannual trends also suggest warmer ocean conditions are either affecting tern foraging behaviors and/or prey resource availability during the late spring and early summer. Overall, results provide new information on adult tern foraging ecology in an important breeding area experiencing rapid environmental change. Écologie de l'alimentation avant la reproduction de trois espèces de sternes nichant dans le golfe du Maine RÉSUMÉ. Diverses espèces d'oiseaux marins migrent chaque année des aires d'hivernage dans l'hémisphère Sud vers le golfe du Maine, aux États-Unis, pour s'y reproduire et élever leurs oisillons. Après la migration, les oiseaux marins adultes dépendent de la présence spatio-temporelle de ressources alimentaires fiables pour reconstituer leurs réserves énergétiques avant la nidification. Cependant, les conditions durant cette fenêtre critique deviennent de plus en plus incertaines étant donné l'ampleur et le rythme auxquels les changements climatiques affectent la région du golfe du Maine. Nous avons étudié l'écologie de l'alimentation avant la reproduction des Sternes arctique (Sterna paradisaea), pierregarin (S. hirundo) et de Dougall (S. dougallii) cette dernière étant une espèce menacée au niveau fédéral -, en analysant les isotopes stables du carbone (δ13C) et de l'azote (δ15N) dans les tissus de coquilles d'oeufs collectées sur sept îles du golfe du Maine de 2016 à 2018. À l'échelle interspécifique, les tendances de la recherche de nourriture par les adultes sont conformes aux attentes basées sur le régime alimentaire des poussins. Aux échelles inter-îles et interannuelles, la variation des valeurs isotopiques et de l'étendue des niches indiquent que les habitudes de recherche de nourriture sont très localisées. Bien que des incertitudes demeurent, les tendances interannuelles portent également à croire que les conditions océaniques plus chaudes affectent les com","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.5751/ace-02224-170213
John J. Johnson, E. Bayne
. Long-distance migrant songbirds are declining globally. Reversing declines requires a good understanding of habitat quality. Local studies have shown that territory settlement date (arrival) is generally correlated with density and productivity. Despite widespread acceptance, large-scale multispecies demonstrations of arrival time being correlated with habitat quality are lacking. We investigated whether arrival date estimated from ecozonal scale bioacoustic monitoring could be predicted by an independent estimate of estimated density for Ovenbird ( Seiurus aurocapilla ), Tennessee Warbler ( Leiothlypis peregrina ), and Yellow-rumped Warbler ( Setophaga coronata ). We also examined local Ovenbird settlement patterns by comparing relative arrival and observed local density differences between nearby territories. Arrival date was estimated as the first focal species detection date on a breeding territory and the cure4insect R package was used to predict estimated average density. Using predicted average density as a habitat quality proxy, we found earlier arrivals in higher quality territories (Ovenbird 1.04 +/- 0.33 days earlier, Tennessee Warbler 1.96 +/- 0.36 days earlier, Yellow-rumped Warbler 1.23 +/- 0.54 days earlier). We also showed that arrival time was earlier in habitats preferred by each species. Spatial patterns of arrival varied among species although latitude was always an important predictor. Locations where predicted Ovenbird densities were estimated to be higher were filled before sites with lower predicted density but only 600 m away (2.9 +/- 1.4 days earlier). Correlating migrant arrival time and density suggests density is a reasonable measure of habitat quality. Combined, density and arrival data from bioacoustics provide a habitat-assessment tool that better informs the types of that of and RÉSUMÉ. Les populations de passereaux migrateurs de longues distances sont en déclin dans le monde entier. Pour inverser cette tendance, il est indispensable de bien comprendre la qualité de l’habitat. Des études locales indiquent que la date d'implantation sur le territoire (d’arrivée) est généralement liée à la densité et à la productivité. Bien que cette idée soit largement acceptée, nous manquons de preuves concernant le lien entre la date d’arrivée en masse d’espèces multiples et la qualité de l’habitat. Nous avons cherché à savoir si la date d’arrivée estimée n fonction d'une surveillance bioacoustique à l’échelle des écozones pouvait être prévue par une estimation indépendante de la densité chez la paruline couronnée ( Seiurus aurocapilla ), la paruline obscure ( Leiothlypis peregrina ) et la paruline à croupion jaune ( Setophaga coronata ). Nous avons également examiné les modèles d'implantation des parulines couronnées en comparant la date d’arrivée relative et observé les différences de densité locales entre les territoires voisins. La date d’arrivée a été estimée comme la première date de détection de l’espèce focale sur un te
。全球范围内，长途迁徙的鸣禽数量正在减少。扭转衰退需要对栖息地质量有很好的了解。当地研究表明，领土定居日期(到达)通常与密度和生产力相关。尽管被广泛接受，但大规模的多物种到达时间与栖息地质量相关的证明还缺乏。我们研究了生态尺度生物声学监测所估计的到达日期是否可以通过独立估计的灰莺(Seiurus aurocapilla)、田纳西州莺(leiothlyypis peregrina)和黄臀莺(Setophaga coronata)的估计密度来预测。我们还通过比较邻近地区的相对到达和观察到的当地密度差异来研究当地的炉鸟定居模式。估计到达日期为孳生区域的第一个焦点种检测日期，并使用cure4insect R包预测估计的平均密度。利用预测的平均密度作为栖息地质量指标，我们发现高质量区域的到达时间较早(白头翁提前1.04 +/- 0.33天，田纳西林莺提前1.96 +/- 0.36天，黄莺提前1.23 +/- 0.54天)。我们还发现，在每个物种偏好的栖息地，到达时间都更早。尽管纬度一直是重要的预测因子，但不同物种的到达空间格局存在差异。预测密度较高的地点比预测密度较低的地点早600 m(2.9 +/- 1.4天)。将候鸟到达时间和密度相关联表明，密度是衡量栖息地质量的合理指标。结合生物声学的密度和到达数据，提供了一种栖息地评估工具，可以更好地告知它们的类型和RÉSUMÉ。长距离迁徙的人口在世界范围内迁徙。倒逆这个趋向,是不可或缺的好理解质量的de l 'habitat。在领土植入日期(到达日期)之外的地方(到达日期)，以及在领土植入日期(到达日期)之外的地方(到达日期)，以及在领土植入日期(到达日期)之外的地方(到达日期)，以及在领土植入日期(到达日期)之外的地方(到达日期)。所有的人都同意，所有的人都同意，所有的人都同意，所有的人都同意，所有的人都同意，所有的人都同意，所有的人都同意，所有的人都同意。在生物声学监测中，我们将收集到的数据与到达日期进行比较，将获得的数据与到达日期进行比较，将获得的数据与到达日期进行比较，将获得的信息与到达日期进行比较，将获得的信息与到达日期进行比较，将获得的信息与到达日期进行比较，将获得的信息与到达日期进行比较，将获得的信息与到达日期进行比较，将获得的信息与到达日期进行比较，将获得的信息与到达日期进行比较，将获得的信息与到达日期进行比较，将获得的信息与到达日期进行比较。我们已经检查模型合理d 'implantation des parulines花边外缘饰圈en comparant la日期d 'arrivee相对等观察莱斯德三硝基甲苯炸药地区之间差异les territoires邻里。到达日期为:， : ; ; ; ; ; ; ; ; ; ; ;En utilisant la densiteise moyenne prsamdite comme unindiceur de la qualitest de l 'habitat, nous avons constateses des到达，加上prsamcoes, les territoires de qualitest susamrieure (parines couronsames 1,04 +/- 0,33小时+ tôt, parine obses 1,96 +/- 0,36小时+ tôt, parine croupion june 1,23 +/- 0,54小时+ tôt)。Nous avons samgalement notnotest que la date d '抵日，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期，日期Les mod Les spatiaux d ' arrival - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Les emplacements où Les densitsians de parulines, comonsames, comestamciere, comsusamrieures, comsusamrieures, comsusamrieures, comsusamrieures, comsusamrieures, enden qu 'elles ne soient distance que de 600 m(2,9 +/- 1,4小时+ tôt)。移民抵达日期和人口密度的调整，建议人口密度调整是一项合理的人居质量调整措施。这些,莱斯登斯炸药的数据不吸烟者日期d 'arrivee卡会par措施bioacoustiques fournissent联合国outil摘要d”de l 'habitat, informe mieux les类型foret在doivent可能门徒倒les易翔同样,ce, deviendra de + en +重要序,l 'utilisation des特雷斯勒换向机构的避暑affecteront l 'augmentation des种群在foret boreale。
{"title":"Bioacoustically derived migration arrival times in boreal birds: implications for assessing habitat quality","authors":"John J. Johnson, E. Bayne","doi":"10.5751/ace-02224-170213","DOIUrl":"https://doi.org/10.5751/ace-02224-170213","url":null,"abstract":". Long-distance migrant songbirds are declining globally. Reversing declines requires a good understanding of habitat quality. Local studies have shown that territory settlement date (arrival) is generally correlated with density and productivity. Despite widespread acceptance, large-scale multispecies demonstrations of arrival time being correlated with habitat quality are lacking. We investigated whether arrival date estimated from ecozonal scale bioacoustic monitoring could be predicted by an independent estimate of estimated density for Ovenbird ( Seiurus aurocapilla ), Tennessee Warbler ( Leiothlypis peregrina ), and Yellow-rumped Warbler ( Setophaga coronata ). We also examined local Ovenbird settlement patterns by comparing relative arrival and observed local density differences between nearby territories. Arrival date was estimated as the first focal species detection date on a breeding territory and the cure4insect R package was used to predict estimated average density. Using predicted average density as a habitat quality proxy, we found earlier arrivals in higher quality territories (Ovenbird 1.04 +/- 0.33 days earlier, Tennessee Warbler 1.96 +/- 0.36 days earlier, Yellow-rumped Warbler 1.23 +/- 0.54 days earlier). We also showed that arrival time was earlier in habitats preferred by each species. Spatial patterns of arrival varied among species although latitude was always an important predictor. Locations where predicted Ovenbird densities were estimated to be higher were filled before sites with lower predicted density but only 600 m away (2.9 +/- 1.4 days earlier). Correlating migrant arrival time and density suggests density is a reasonable measure of habitat quality. Combined, density and arrival data from bioacoustics provide a habitat-assessment tool that better informs the types of that of and RÉSUMÉ. Les populations de passereaux migrateurs de longues distances sont en déclin dans le monde entier. Pour inverser cette tendance, il est indispensable de bien comprendre la qualité de l’habitat. Des études locales indiquent que la date d'implantation sur le territoire (d’arrivée) est généralement liée à la densité et à la productivité. Bien que cette idée soit largement acceptée, nous manquons de preuves concernant le lien entre la date d’arrivée en masse d’espèces multiples et la qualité de l’habitat. Nous avons cherché à savoir si la date d’arrivée estimée n fonction d'une surveillance bioacoustique à l’échelle des écozones pouvait être prévue par une estimation indépendante de la densité chez la paruline couronnée ( Seiurus aurocapilla ), la paruline obscure ( Leiothlypis peregrina ) et la paruline à croupion jaune ( Setophaga coronata ). Nous avons également examiné les modèles d'implantation des parulines couronnées en comparant la date d’arrivée relative et observé les différences de densité locales entre les territoires voisins. La date d’arrivée a été estimée comme la première date de détection de l’espèce focale sur un te","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.5751/ace-02231-170222
Luiza Carvalho Prado, T. C. Dias, Lahert William Lobo de Araújo, L. F. Silveira, M. Francisco
. The Pernambuco Endemism Center (PEC) is the most fragmented and degraded tract of the Atlantic Forest, considered to be a hotspot within a hotspot. Recent bird extinctions and the high number of endangered taxa have called the attention of conservation practitioners all over the world to this area. Among the most vulnerable groups of birds are the insectivorous passerines of the forest understory, yet empirical information on demography and habitat requirements are unavailable for these taxa. Here, we provide population density estimates and microhabitat selection information for two endangered insectivorous passerines endemic to the PEC, the Pernambuco Fire-eye, Pyriglena pernambucensis , and the Black-cheeked Gnateater, Conopophaga melanops nigrifrons . Distance-sampling estimates resulted in population densities of 0.15 and 0.35 individuals/ha, respectively, in an Atlantic Forest fragment of approximately 1000 ha. Extrapolations of population densities to 39 fragments where the occurrence of these taxa was confirmed resulted in population estimates of 4936 individuals for the Pernambuco Fire-eye and 12,679 individuals for the Black-cheeked Gnateater, but these may be underestimates because other fragments where they could potentially occur were never surveyed. Although extrapolating data from only one fragment to other areas is problematic, these are the first rough minimum population size estimates for birds from the PEC. Microhabitat preference analyses revealed that both species selected sites with denser forest understory vegetation, which is associated with areas in regeneration. This is evidence that these taxa can tolerate certain levels of habitat disturbance and that their limited distributions and habitat loss may be more important causes of threat than habitat requirements. In the face of ongoing PEC fragmentation, our data will serve to parameterize other studies and may contribute to practical conservation policies
{"title":"Population density estimates and key microhabitat parameters for two endangered tropical forest understory insectivorous passerines from the Pernambuco Endemism Center","authors":"Luiza Carvalho Prado, T. C. Dias, Lahert William Lobo de Araújo, L. F. Silveira, M. Francisco","doi":"10.5751/ace-02231-170222","DOIUrl":"https://doi.org/10.5751/ace-02231-170222","url":null,"abstract":". The Pernambuco Endemism Center (PEC) is the most fragmented and degraded tract of the Atlantic Forest, considered to be a hotspot within a hotspot. Recent bird extinctions and the high number of endangered taxa have called the attention of conservation practitioners all over the world to this area. Among the most vulnerable groups of birds are the insectivorous passerines of the forest understory, yet empirical information on demography and habitat requirements are unavailable for these taxa. Here, we provide population density estimates and microhabitat selection information for two endangered insectivorous passerines endemic to the PEC, the Pernambuco Fire-eye, Pyriglena pernambucensis , and the Black-cheeked Gnateater, Conopophaga melanops nigrifrons . Distance-sampling estimates resulted in population densities of 0.15 and 0.35 individuals/ha, respectively, in an Atlantic Forest fragment of approximately 1000 ha. Extrapolations of population densities to 39 fragments where the occurrence of these taxa was confirmed resulted in population estimates of 4936 individuals for the Pernambuco Fire-eye and 12,679 individuals for the Black-cheeked Gnateater, but these may be underestimates because other fragments where they could potentially occur were never surveyed. Although extrapolating data from only one fragment to other areas is problematic, these are the first rough minimum population size estimates for birds from the PEC. Microhabitat preference analyses revealed that both species selected sites with denser forest understory vegetation, which is associated with areas in regeneration. This is evidence that these taxa can tolerate certain levels of habitat disturbance and that their limited distributions and habitat loss may be more important causes of threat than habitat requirements. In the face of ongoing PEC fragmentation, our data will serve to parameterize other studies and may contribute to practical conservation policies","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.5751/ace-02241-170218
Kevin C. Hannah, L. Leston, Elly C. Knight, R. Weeber
. Surveys optimized to coincide with peak detectability of target species are critical to the success of monitoring programs, especially those targeting species of conservation concern. Established species-specific survey protocols are often inconsistent between jurisdictions, with limited spatial and temporal data to inform survey timing. The recent proliferation of programmable autonomous recording units (ARUs) and automated detection software enables the processing of huge volumes of acoustic data, which can improve our understanding of the acoustic phenology of many bird species. In May–July 2014, we deployed ARUs across a gradient of latitude near the northern limit of the breeding range of the Common Nighthawk ( Chordeiles minor ), a species of conservation concern, to quantify variation in temporal detection patterns. Most activity occurred after sunset and before sunrise, with a pronounced peak during civil twilight. We found considerable latitudinal differences in the activity patterns of birds, related to variation in the occurrence or duration of twilight periods. At northern sites (> 60° N), birds were active from dusk until dawn, likely because civil twilight lasted the entire period. At southern sites (< 55° N), twilight periods were short, resulting in concentrated, bimodal activity. Activity peaked in the middle of the breeding season, which occurred earlier in the south than the north. Our results suggest surveys should occur in June in southern Canada (> 50° N) and between mid-June and mid-July further north, given high activity rates throughout the breeding season. Given that non-vocal booms are more strongly associated with breeding activity and nesting sites, future surveys should focus on targeting this acoustic signal. Considering the timing of activity patterns in this species, we recommend a targeted, species-specific survey to ensure documentation of their abundance and distribution. Finally, we provide recommendations to improve survey timing and provide advice for acoustic data management and processing in relation to this species. pic prononcé pendant le crépuscule civil. Nous avons trouvé des différences latitudinales considérables dans la tendance de l’activité des oiseaux, liées à la variation de l’occurrence ou de la durée des périodes crépusculaires. Sur les sites septentrionaux (> 60° N.), les oiseaux étaient actifs du crépuscule à l’aube, probablement parce que le crépuscule civil durait toute la période. Sur les sites méridionaux (< 55° N.), les périodes crépusculaires étaient courtes, ce qui a entraîné une activité concentrée et bimodale. L’activité a atteint un pic au milieu de la saison de nidification, qui a eu lieu plus tôt dans le sud que dans le nord. Nos résultats indiquent que les relevés devraient s’effectuer en juin dans le sud du Canada (> 50° N.) et entre la mi-juin et la mi-juillet plus au nord, étant donné le taux d’activité élevé tout au long de la saison de nidification. Comme les booms non vo
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Pub Date : 2022-01-01DOI: 10.5751/ace-02261-170236
Meghan A. Beatty, K. Miller, Robert J. Fletcher Jr
{"title":"Snag density and stand age, but not stand size, explain occupancy and reproduction of an imperiled cavity nester in early successional forest","authors":"Meghan A. Beatty, K. Miller, Robert J. Fletcher Jr","doi":"10.5751/ace-02261-170236","DOIUrl":"https://doi.org/10.5751/ace-02261-170236","url":null,"abstract":"","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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