Waterbirds最新文献_第4页

Great Horned Owls Affect Herring Gull Nest Attentiveness 大角猫头鹰影响鲱鸥筑巢的专注度

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-11-22 DOI: 10.1675/063.046.0104

Serina Serré, Courtney Irvine, Katie Lockhart, Craig E. Hebert

{"title":"Great Horned Owls Affect Herring Gull Nest Attentiveness","authors":"Serina Serré, Courtney Irvine, Katie Lockhart, Craig E. Hebert","doi":"10.1675/063.046.0104","DOIUrl":"https://doi.org/10.1675/063.046.0104","url":null,"abstract":"Abstract. Herring Gull (Larus argentatus) populations in Pukaskwa National Park have declined by 70% over the last 40 years. Populations of avian predators that prey on Herring Gulls have increased which could be a significant factor impacting gull populations. Here, we investigate Herring Gull daytime and nighttime nest attentiveness at locations with and without evidence of nocturnal predators. In 2017, Herring Gull nest attentiveness was examined at two sites using remote cameras. At one of those sites Great Horned Owl (Bubo virginianus) predation was observed, and gull nighttime nest attentiveness was lower there than at the site where owls were not observed. There were no inter-site differences in daytime nest attentiveness. In 2018, Herring Gull nest attentiveness was further investigated at the site where owls were present. At that site, Herring Gull nighttime nest attentiveness was significantly lower than during the day. Extended periods of absence of gulls from their nests during the night corresponded with the presence of owls. Predation of nest contents, in addition to the effects of other environmental stressors, are likely contributing to declines in Pukaskwa National Park's Herring Gull population.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139250566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of Diets in the California Least Tern (Sternula antillarum browni) at Two Sites in Central California, U.S.A. 美国加利福尼亚州中部两个地点的加州燕鸥（Sternula antillarum browni）膳食比较

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-11-22 DOI: 10.1675/063.046.0109

Alyssa G. Leicht, D. Robinette, Meredith L. Elliott, Michael H. Horn

{"title":"Comparison of Diets in the California Least Tern (Sternula antillarum browni) at Two Sites in Central California, U.S.A.","authors":"Alyssa G. Leicht, D. Robinette, Meredith L. Elliott, Michael H. Horn","doi":"10.1675/063.046.0109","DOIUrl":"https://doi.org/10.1675/063.046.0109","url":null,"abstract":"Abstract. We evaluated diet and diet assessment methods for the California Least Tern (Sternula antillarum browni) at two nesting sites in California over 12 years (2001–2012). California Least Tern diets at Alameda Point (37° 47′ 14″ N, 122° 19′ 12″ W), an estuarine site, and Purisima Point (34° 46′ 39″ N, 120° 37′ 35″ W), an open coast site, were compared using dropped fish and hard parts (otoliths and scales) from regurgitated pellets and fecal samples. SIMPER analyses, Kendall's tau, Kruskal-Wallis, Dunn's test, rank-sum tests, and Welch's t-test determined any differences in assessment methods, chick and adult diets, and sizes of prey items. Diet composition differed between sites for both dropped fish (25% similar) and fecal samples (26%). Assessment methods showed similar results at Alameda Point (79%) for dropped fish and fecal samples but not at Purisima Point when comparing dropped fish to fecal samples (12%) and fecal samples to regurgitated pellets (19%). There was no difference in diet composition at either site or between any method using adult-only samples. All differences in diet composition appeared during the rearing/fledging stage. Fish species dropped at both sites were deeper-bodied (17 mm) than those consumed (11.9 mm), with terns at Purisima Point dropping deep-bodied species typically not consumed and those at Alameda Point dropping larger individuals of usually-consumed species. When comparing adult and chick diets at Alameda Point using fecal samples, composition was similar, and chicks ate larger prey. Our results suggest that more than one assessment method is necessary to provide a complete dietary picture.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139248541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dietary Plasticity Mitigates Impacts to Reproduction for the Gull-Billed Tern Gelochelidon nilotica During Abnormally Warm Sea Surface Temperature Events in California, U.S.A. 美国加州异常温暖的海面温度事件中饮食可塑性减轻了对nilotica Gelochelidon鸥嘴鸥繁殖的影响

4区生物学

Waterbirds Pub Date : 2023-09-18 DOI: 10.1675/063.045.0409

Katharine S. Goodenough, Robert T. Patton, Julio Lorda

{"title":"Dietary Plasticity Mitigates Impacts to Reproduction for the Gull-Billed Tern Gelochelidon nilotica During Abnormally Warm Sea Surface Temperature Events in California, U.S.A.","authors":"Katharine S. Goodenough, Robert T. Patton, Julio Lorda","doi":"10.1675/063.045.0409","DOIUrl":"https://doi.org/10.1675/063.045.0409","url":null,"abstract":"Large scale oceanic processes can have profound consequences for marine and coastal food webs. Mortality and reproductive related impacts to seabirds have been documented for decades, and current research suggests that dietary flexibility may be a key component by which birds can mitigate environmental variation. Our motivation for this research was to better understand how a dietary generalist in the coastal environment responds to changes in prey food availability. The Gull-billed Tern Gelochelidon nilotica is a coastal nesting species that has an opportunistic generalist diet. We monitored both tern diet and density of a main prey resource to examine how responsive these terns are to annual variation in prey resources. Our results documented that the loss of a ubiquitous prey resource did not appear to influence tern annual reproductive success even though, in some years, Emerita analoga comprised greater than 70% of Gull-billed Tern diet. During breeding seasons with warmer than average sea surface temperatures, the Gull-billed Tern switched to a more terrestrial diet and focused aquatic foraging activities upon crustacean species that are more tolerant of warmer water temperatures. Dietary plasticity can be beneficial to mitigate variation in prey resource availability and impacts on reproductive success, and the ability to respond rapidly to changes in resources may play an important role in how coastal species can acclimate or adapt to annual changes in the prey base.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135109986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Roost Sites Influence Habitat Selection of Sandhill Cranes (Antigone canadensis tabida) in Arizona and California 栖息地点对亚利桑那州和加利福尼亚州沙丘鹤生境选择的影响

4区生物学

Waterbirds Pub Date : 2023-09-18 DOI: 10.1675/063.045.0407

Daniel P. Collins, Matthew A. Boggie, Kammie L. Kruse, Courtenay M. Conring, J. Patrick Donnelly, Warren C. Conway, Blake A. Grisham

{"title":"Roost Sites Influence Habitat Selection of Sandhill Cranes (Antigone canadensis tabida) in Arizona and California","authors":"Daniel P. Collins, Matthew A. Boggie, Kammie L. Kruse, Courtenay M. Conring, J. Patrick Donnelly, Warren C. Conway, Blake A. Grisham","doi":"10.1675/063.045.0407","DOIUrl":"https://doi.org/10.1675/063.045.0407","url":null,"abstract":"Wetlands in arid and semiarid regions are recognized as priority ecosystems for conservation of wetland-dependent species in these systems. Evaluation of habitat selection is necessary for effective habitat management and, consequently, population management. The Lower Colorado River Valley population of Greater Sandhill Cranes (Antigone canadensis tabida), winters exclusively in portions of southwestern Arizona and southeastern California. Therefore, there is a need for information pertaining to winter habitat selection to guide management decisions. We attached solar-powered satellite platform transmitter terminals to greater Sandhill Cranes and used daily global positioning system locations. Each used location paired with 10 randomly generated locations had equal probability of drawing any of the randomly generated locations. We evaluated habitat selection and found the model that included land use type (β = –5.85, SE = 0.23, P < 0.001) and distance to roost (β = –4.61, SE = 0.16, P < 0.001) as interactive effects was the most supported model in the candidate set. Our results emphasize the importance of maintaining wetlands in close proximity (∼ 5 km) to selected land use types, which can be challenging to manage for in arid systems but are particularly necessary for this high conservation priority population of greater Sandhill Cranes.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135109991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Natural Hybridization between a Cattle Egret (Bubulcus ibis) and a Little Egret (Egretta garzetta) in Japan 日本牛白鹭(Bubulcus ibis)与小白鹭(Egretta garzetta)的自然杂交

4区生物学

Waterbirds Pub Date : 2023-09-18 DOI: 10.1675/063.045.0415

Kanade Komaru, Satoshi Tanaka, Junji Moribe

引用次数: 1

The Importance of a Network of Sites to Maintain Hudsonian Godwits (Limosa haemastica) in a Critical Non-Breeding Area 在一个关键的非繁殖区建立一个站点网络来维持哈德逊鹬(利马沙)的重要性

4区生物学

Waterbirds Pub Date : 2023-09-18 DOI: 10.1675/063.045.0403

Jorge Valenzuela Rojas, Brad A. Andres, Steven L. Garman

{"title":"The Importance of a Network of Sites to Maintain Hudsonian Godwits (Limosa haemastica) in a Critical Non-Breeding Area","authors":"Jorge Valenzuela Rojas, Brad A. Andres, Steven L. Garman","doi":"10.1675/063.045.0403","DOIUrl":"https://doi.org/10.1675/063.045.0403","url":null,"abstract":"Many shorebirds rely on a set of key sites to complete their annual cycles at the flyway, regional, and landscape scales. Coastal wetlands on Chiloé Island, Chile, (Chiloé) support a high proportion of the Hudsonian Godwits (Limosa haemastica) spending the boreal winter along the Pacific coast of the Americas. We conducted annual counts of godwits on Chiloé between 2010 and 2020 to estimate trend in the population. To understand use of individual sites and local networks of sites (clusters), we conducted monthly counts September 2013–March 2014 and September 2017–March 2018. Because of wide variation in annual counts, we did not detect a significant trend in abundance of godwits on Chiloé. Mean monthly abundance summed across all sites during December–February varied markedly among site clusters, with godwits being most abundant in the central Chiloé cluster. Across Chiloé, variation in monthly counts of godwits at individual sites was twice as great as variation in counts summed within a cluster. Casual re-sightings of color-flagged godwits supported the idea that godwits used clusters consistently across years. Our results illustrate the importance of conserving a network of sites across multiple scales as an important step in maintaining Hudsonian Godwit populations.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135110223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Coastal Bird Reproductive Metrics and Distribution in Alabama: A Review of Historical Data and Status Update 阿拉巴马州沿海鸟类繁殖指标和分布:历史数据回顾和现状更新

4区生物学

Waterbirds Pub Date : 2023-09-18 DOI: 10.1675/063.045.0404

Olivia A. Morpeth, Sabrina D. Cobb, Lianne M. Koczur, Fallan Batchelor

{"title":"Coastal Bird Reproductive Metrics and Distribution in Alabama: A Review of Historical Data and Status Update","authors":"Olivia A. Morpeth, Sabrina D. Cobb, Lianne M. Koczur, Fallan Batchelor","doi":"10.1675/063.045.0404","DOIUrl":"https://doi.org/10.1675/063.045.0404","url":null,"abstract":"A holistic approach to monitoring reproductive success of birds includes determining numbers of pairs, nests, chicks, and fledglings. Long-term monitoring will elucidate potential changes in the breeding population size and distribution, and possibly the causes of those changes. Further, monitoring in all stages of the reproductive cycle will help identify which stage might be limiting population growth. To assess the historical breeding populations of coastal birds in Alabama, we conducted a literature review and summarized data on reproductive metrics for American Oystercatcher (Haematopus palliatus), Black Skimmer (Rynchops niger), Least Tern (Sternula antillarum), Reddish Egret (Egretta rufescens), Snowy Plover (Charadrius nivosus), and Wilson's Plover (Charadrius wilsonia). We found 287 records from 20 sources with various metrics reported, including number of adults, pairs, nests, chicks, and fledglings, and 92 eBird records. We compared historical records to data collected during 2018–2021 to determine if and how breeding populations changed. We also compared historical and recent nesting distribution along the Alabama coast. We discuss apparent changes in breeding population sizes and potential reasons for changes in distribution, and use recent data on breeding population size and reproductive success to assess how it relates to the current conservation status of each species in Alabama.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135110224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Group Adherence in Endangered California Least Terns (Sternula antillarum browni) 濒危加利福尼亚最小燕鸥(Sternula antillarum browni)的群体依附性

4区生物学

Waterbirds Pub Date : 2023-09-18 DOI: 10.1675/063.045.0410

Patricia Baird

{"title":"Group Adherence in Endangered California Least Terns (Sternula antillarum browni)","authors":"Patricia Baird","doi":"10.1675/063.045.0410","DOIUrl":"https://doi.org/10.1675/063.045.0410","url":null,"abstract":"Colonial nesting in seabirds is advantageous for protection from predators—spotting a predator, mobbing, and predator swamping. Familiarity with nesting areas gives knowledge of protected sites and may promote site fidelity. Familiarity with nearest neighbors helps nesting success by lessening intraspecific aggression and increasing social facilitation, and may promote group adherence. Group adherence has been proposed as more important than site tenacity for some species where nesting areas are frequently disturbed. Ground-nesting terns often nest at disturbed sites, and their colonies are accessible to predators. Serendipitously, I was able to test the concept of group adherence in individually color-marked California Least Terns Sternula antillarum browni during early egg-laying when some nests in a colony in southern California were depredated, and the adults deserted. A week later, I found the majority of those birds nesting at the edge of a small Least Tern colony 28 km distant, where they laid a second clutch and remained at the site the rest of the breeding season. The following breeding season, no color-marked terns nested again at the small colony where they had moved after disturbance.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135110222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Record-Sized Flock of Whooping Cranes (Grus americana) Observed Staging in the Central Platte River Valley During Autumn 2021 2021年秋季，在中央普拉特河谷观测到创纪录规模的鹤群(美洲鹤)

4区生物学

Waterbirds Pub Date : 2023-09-18 DOI: 10.1675/063.045.0413

David M. Baasch, Matt Rabbe, Amanda H. Medaries, Matthew R. Schaaf, Bethany L. Ostrom, Joshua D. Wiese, Jenna M. Malzahn, Timothy J. Smith

引用次数: 1

Pre- and Post-Impoundment Study of Breeding Waterfowl Use of a Hydroelectric Reservoir in the Eastern Canadian Boreal Forest 加拿大东部北方森林水电站蓄水池养殖水禽的蓄水前后研究

4区生物学

Waterbirds Pub Date : 2023-09-18 DOI: 10.1675/063.045.0405

Hélène Sénéchal, Stéphane Lapointe, Jean-Philippe Gilbert, François Fabianek, François Bolduc

{"title":"Pre- and Post-Impoundment Study of Breeding Waterfowl Use of a Hydroelectric Reservoir in the Eastern Canadian Boreal Forest","authors":"Hélène Sénéchal, Stéphane Lapointe, Jean-Philippe Gilbert, François Fabianek, François Bolduc","doi":"10.1675/063.045.0405","DOIUrl":"https://doi.org/10.1675/063.045.0405","url":null,"abstract":"Impoundment of hydroelectric reservoirs deeply modifies habitats available for waterfowl because it involves transforming a fast-flowing river, its tributaries and nearby ponds and wetlands into a large body of water. Using a Before-After-Control-Impact design, we evaluated whether the creation of the Péribonka reservoir, a steep-sloped hydroelectric reservoir with low water level fluctuations, affected the abundance and species composition of waterfowl breeding pairs and broods in the area. We used helicopter-based waterfowl survey data covering a period of 2 years before and a period of 10 years after the creation of the reservoir. We also used 9 5x5 km plots and 72 km of river as control sites. Our results show that breeding pair density slightly increased after impoundment, while brood density increased significantly (sixfold), especially for Common Goldeneye (Bucephala clangula). This suggests that there were favorable habitat gains for waterfowl after impoundment, probably due to low water level fluctuations and localized areas of shallow water, and that mitigation measures likely helped to reduce the impact of the project. Because this BACI study ended 10 years after impoundment, it remains difficult to ascertain whether conditions in the Péribonka reservoir have stabilized or are still evolving.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135109993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1