Waterbirds最新文献_第8页

Range Expansion and Breeding of White-Cheeked Pintail (Anas bahamensis) in the High Andes 安第斯高原白颊斑尾鱼的范围扩大和繁殖

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-02-08 DOI: 10.1675/063.045.0213

D. Cisneros-Heredia, Mirjaya Izurieta, Emilia Peñaherrera, M. Musschenga

引用次数: 2

Comparability and Repeatability of Candling and Floating Methods for Estimating Embryo Age of Waterbird Eggs 蜡烛法和浮法估算水鸟卵胚龄的可比性和可重复性

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-02-08 DOI: 10.1675/063.045.0208

Anastasia M. Maliguine, Christopher J. Latty, Elyssa M. Watford, T. Hollmen

{"title":"Comparability and Repeatability of Candling and Floating Methods for Estimating Embryo Age of Waterbird Eggs","authors":"Anastasia M. Maliguine, Christopher J. Latty, Elyssa M. Watford, T. Hollmen","doi":"10.1675/063.045.0208","DOIUrl":"https://doi.org/10.1675/063.045.0208","url":null,"abstract":"Abstract. Determining embryo age is important for predicting hatch dates, planning nest visitation schedules, and as a model covariate examining factors affecting nest survival and behavior. Two common methods of estimating embryo age are egg candling and egg flotation (floating). Despite the reliance on these methods, there is little information regarding the repeatability of these techniques between multiple observers, or whether these techniques produce equivalent estimates. To determine how these methods compare and if precision of each method is biased by individual observers, paired observers candled and floated the same Common Eider (Somateria mollissima) eggs. We compared differences in embryo-age estimates across incubation between (1) candling and floating, (2) paired observers candling eggs, and (3) paired observers floating eggs. Floating and candling produced different embryo-age estimates during some periods of incubation. Although most estimates deviated by a few days, inconsistencies could impact results and statistical power when methods are interchanged between projects or across years. Observers derived different embryo-age estimates for candling, but not for floating, suggesting flotation may be more reliable. Our results suggest caution when combining candling and floating-derived data when collected across incubation stages. Investigators should consider how data collected by multiple observers may affect their research question.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81634259","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

eDNA Metabarcoding Analyses of Diet in Yellow-Billed Loons of Northern Alaska 阿拉斯加州北部黄嘴龙饮食的eDNA元条形码分析

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-02-08 DOI: 10.1675/063.045.0206

D. Menning, B. Uher-Koch, Melanie J. Flamme, T. Simmons, J. Schmutz, S. Talbot

{"title":"eDNA Metabarcoding Analyses of Diet in Yellow-Billed Loons of Northern Alaska","authors":"D. Menning, B. Uher-Koch, Melanie J. Flamme, T. Simmons, J. Schmutz, S. Talbot","doi":"10.1675/063.045.0206","DOIUrl":"https://doi.org/10.1675/063.045.0206","url":null,"abstract":"Abstract. Environmental DNA is a burgeoning tool used to address wide-ranging scientific questions, including determining diets of difficult-to-sample predators. Loons are large piscivorous diving birds that capture and consume prey underwater, making it nearly impossible to visually determine their diet via observation alone. Identifying species' diets is important for understanding basic life history traits, and revealing key prey species can clarify species' roles in complex trophic webs, aid in understanding population and community dynamics, and help identify critical habitat for protection. Current information about loon diet is largely anecdotal, and traditional non-observational methods for quantifying loon diet have limitations. Analysis of eDNA from loon feces may provide biologists with a non-invasive technique for determining diet without negative sampling effects, and with increased resolution as compared to other techniques. We surveyed lakes in two areas of northern Alaska for Yellow-billed Loons (Gavia adamsii). Loon fecal samples were collected opportunistically from latrine sites without disturbing any animals and analyzed using novel marker sets to determine loon species and diet. Fish species were detected in all fecal samples, the most common being Alaska blackfish (Dallia pectoralis), and ninespine stickleback (Pungitius pungitius). This research demonstrates that eDNA metabarcoding analyses of loon fecal samples can determine the specific loon species that deposited the feces and characterize the piscine portion of their diet with limited disturbance to the animals.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79515995","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

Synchronous Declines of Wintering Waders and High-Tide Roost Area in a Temperate Estuary: Results of a 10-Year Monitoring Programme 温带河口越冬涉禽和高潮栖地同步减少:10年监测结果

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-02-08 DOI: 10.1675/063.045.0204

J. Belo, M. Dias, João Jara, Amélia Almeida, Frederico Morais, Carlos Silva, Joaquim Valadeiro, J. A. Alves

{"title":"Synchronous Declines of Wintering Waders and High-Tide Roost Area in a Temperate Estuary: Results of a 10-Year Monitoring Programme","authors":"J. Belo, M. Dias, João Jara, Amélia Almeida, Frederico Morais, Carlos Silva, Joaquim Valadeiro, J. A. Alves","doi":"10.1675/063.045.0204","DOIUrl":"https://doi.org/10.1675/063.045.0204","url":null,"abstract":"Abstract. Migratory wader populations are declining across all major flyways, mostly due to habitat loss and human disturbance. Portuguese wetlands act as key wintering and stop-over sites for many waders due to their strategic location in the East Atlantic Flyway. Despite their importance, there are major knowledge gaps in some areas, such as the Sado Estuary. The main goal of this study was to identify the phenological patterns and wintering trends of the most abundant wader species in this wetland, and to compare the results with the population trends found at regional and flyway scales. A comprehensive dataset of count data collected monthly in high-tide roosts under a set monitoring programme (2010–2019) was used. The results revealed strong declines in the overall number of waders and of three of the most abundant species—Avocet (Recurvisostra avosetta), Dunlin (Calidris alpina), and Common Ringed Plover (Charadrius hiaticula)—associated with a 21% reduction of the suitable high-tide roosts across the study area. These trends are similar to those compiled from winter counts for the entire Sado Estuary, and at regional (Tagus Estuary) and flyway levels. Our results highlight the need to maintain suitable high-tide roosts to contribute towards reverting current declines in wader populations.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85217430","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: 3

Roseate Terns (Sterna dougallii) Frequently Desert Viable Eggs without Incubating Them 玫瑰色燕鸥(Sterna dougallii)经常弃卵而不孵化

IF 0.3 4区生物学

Waterbirds Pub Date : 2022-11-11 DOI: 10.1675/063.045.0114

I. Nisbet

引用次数: 2

Sternal Punctures in Common Loons (Gavia immer): Gender and Territorial Aggression 普通胸骨穿刺:性别和领土侵略

IF 0.3 4区生物学

Waterbirds Pub Date : 2022-11-11 DOI: 10.1675/063.045.0109

A. Higgins, M. Hartwick, M. Pokras

{"title":"Sternal Punctures in Common Loons (Gavia immer): Gender and Territorial Aggression","authors":"A. Higgins, M. Hartwick, M. Pokras","doi":"10.1675/063.045.0109","DOIUrl":"https://doi.org/10.1675/063.045.0109","url":null,"abstract":"Abstract. Aggression between adult Common Loons (Gavia immer) occurs frequently during the breeding season. In the past, it was suspected that most instances of intraspecific aggression took place between adult males. However, recent reports from the field suggest that female adult loons also participate in these battles. Postmortem investigation has shown that the damage incurred during these battles can range from incidental to fatal injuries. Sternal punctures are the most lasting evidence of this trauma and can serve as long-term records. Nearly half (46%, n = 268/574) of the loons received at Tufts Wildlife Clinic for postmortem from 2007 to 2015 were found to have sternal punctures. We conducted a focused analysis of the sternal punctures of 102 of these adult loons (49 female and 53 male) and found no significant difference in the number, distribution, or severity of sternal punctures between male and female loons. This suggests that the frequency and intensity of aggressive physical contests are remarkably similar between sexes and that there is no gender difference in the severity of these battles. Female Common Loons participate in lethal combats as often as their male counterparts. These findings provide an opportunity to better understand and study the biological or behavioral drivers of this aggression that is prevalent among both male and female Common Loons.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84012390","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

Editorial: Transitioning Editorial Boards Through a Global Pandemic 社论:在全球大流行病中过渡编辑委员会

IF 0.3 4区生物学

Waterbirds Pub Date : 2022-11-11 DOI: 10.1675/063.045.0101

K. G. Sundar

引用次数: 1

Reproductive Success of Red-Billed Tropicbirds (Phaethon aethereus) on St. Eustatius, Caribbean Netherlands 荷兰加勒比海圣尤斯特修斯岛红嘴热带鸟(Phaethon aethereus)繁殖成功率

IF 0.3 4区生物学

Waterbirds Pub Date : 2022-11-11 DOI: 10.1675/063.045.0106

H. Madden, M. Leopold, F. Rivera-Milán, K. Verdel, Eline Eggermont, P. Jodice

{"title":"Reproductive Success of Red-Billed Tropicbirds (Phaethon aethereus) on St. Eustatius, Caribbean Netherlands","authors":"H. Madden, M. Leopold, F. Rivera-Milán, K. Verdel, Eline Eggermont, P. Jodice","doi":"10.1675/063.045.0106","DOIUrl":"https://doi.org/10.1675/063.045.0106","url":null,"abstract":"Abstract. The daily nest-survival rates of Red-billed Tropicbirds (Phaethon aethereus) were estimated over six breeding seasons on St. Eustatius in the Caribbean. We analyzed 338 nesting attempts between 2013 and 2020. The daily survival rate (DSR) of tropicbird nests was modeled as a function of nest initiation date, sea surface temperature (SST), elevation, vegetation in front of the nest, and year. Yearly nest survival rates (± SE) of the best fitting models ranged from 0.21 ± 0.06–0.74 ± 0.13 (n = 338 nests). DSR of the most parsimonious models averaged 0.39 ± 0.04 during the incubation period, 0.83 ± 0.05 during the chick-rearing period, and 0.30 ± 0.04 during the nesting period (incubation through fledging) when data were pooled across all years. Models with linear and quadratic trends of nest initiation date combined with SST and elevation received strong support in the incubation and nesting periods. Nests initiated in peak nesting season, when SSTs were lower, had higher DSR estimates than nests initiated early or late in the season. Compared to studies of the same species from Saba and the Gulf of California, survival probability on St. Eustatius was lower during the incubation stage but higher during the chick-rearing period. Similar to populations in the Gulf of California, tropicbird reproduction differed and laying date varied among years, and survival was influenced by SST. Our results are consistent with a study on White-tailed Tropicbirds (Phaethon lepturus) in Bermuda which found that survival was affected by temporal factors rather than physical site characteristics. Our study contributes to a better understanding of the factors that influence Red-billed Tropicbird survival on a small Caribbean island.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84682697","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

Overwinter Movement of Atlantic Puffins (Fratercula arctica) Breeding in the Gulf of Maine: Inter- and Intra-Colony Effects 缅因湾大西洋海雀(北极海雀)越冬运动:种群间和种群内的影响

IF 0.3 4区生物学

Waterbirds Pub Date : 2022-11-11 DOI: 10.1675/063.045.0103

Mark A. Baran, Stephen Kress, Paula Shannon, D. Lyons, H. Major, A. Diamond

{"title":"Overwinter Movement of Atlantic Puffins (Fratercula arctica) Breeding in the Gulf of Maine: Inter- and Intra-Colony Effects","authors":"Mark A. Baran, Stephen Kress, Paula Shannon, D. Lyons, H. Major, A. Diamond","doi":"10.1675/063.045.0103","DOIUrl":"https://doi.org/10.1675/063.045.0103","url":null,"abstract":"Abstract. To identify potential threats and prioritize areas for protection, modern conservation efforts rely on spatial data. While it is often impossible to study the movements of entire populations, we can examine patterns among individuals and groups to better understand populations as a whole. We used geolocator tags to determine where Atlantic Puffins (Fratercula arctica) at the southern edge of their range, vulnerable to warming waters and anthropogenic influence, spend the nonbreeding season, and whether birds from different colonies or parts of the same colony used different overwintering strategies. Between 2013 and 2017, tags were deployed on 97 puffins breeding on three islands in the Gulf of Maine: Machias Seal Island, Matinicus Rock, and Seal Island National Wildlife Refuge. Most tagged puffins remained in or near the Gulf of Maine throughout the autumn and early winter months, venturing as far south as Cape Hatteras (ca. 35°N) in February, March, and April, before returning to their respective colonies. Three individuals travelled north to the Gulf of St. Lawrence and waters around Newfoundland immediately after breeding, returning to the Gulf of Maine in mid-winter. We found no evidence of inter- or intra-colony differences in overwinter movement. This is the first study focusing on overwinter movements of puffins breeding at the southern edge of their range in North America and can assist in the development of policy regarding management and protection of important marine areas for puffins and other species.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73100876","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: 4

Soras over Illinois: Nocturnal Settlement Patterns in Porzana carolina are Site-Specific But Show No Evidence of Visual or Acoustic Cues 伊利诺伊州上空的索拉斯:卡罗莱纳波尔扎纳的夜间定居模式是特定地点的，但没有显示视觉或听觉线索的证据

IF 0.3 4区生物学

Waterbirds Pub Date : 2022-11-11 DOI: 10.1675/063.045.0110

Daniel L Goldberg, Ashley M. Tauber, M. Ward, A. Capparella

{"title":"Soras over Illinois: Nocturnal Settlement Patterns in Porzana carolina are Site-Specific But Show No Evidence of Visual or Acoustic Cues","authors":"Daniel L Goldberg, Ashley M. Tauber, M. Ward, A. Capparella","doi":"10.1675/063.045.0110","DOIUrl":"https://doi.org/10.1675/063.045.0110","url":null,"abstract":"Abstract. Many birds migrate at night, but little is known about whether they base nocturnal settlement decisions on visual or acoustic cues. Studies of conspecific attraction have found that songbirds and seabirds are attracted by day to call playback or decoy models, and birds will also settle preferentially in certain environments based on the presence of vegetation or water bodies. Remotely activated broadcasts and Autonomous Recording Units were applied to study whether Soras (Porzana carolina), common nocturnally migrating rails in central Illinois, could be enticed to settle in farm field habitats. At three study areas (farms) we used cues to attempt to attract Soras, with our experimental design consisting of Sora vocalizations, small ponds (Sora habitat), both cues, and no cues. Neither conspecific playback, visual pond cues, nor their combination significantly influenced Sora settlement. However, there were significant differences between farms in Sora calls recorded. One study area, Franklin Farm, had the most Sora detections during the study period, consistent with its high-quality habitat status as a Nature Conservancy restored wetland. As nocturnal calls were detected at every farm sampled, these results may assist wetland managers in promoting Sora settlement in critical breeding habitats in Illinois and beyond.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83166139","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