Waterbirds最新文献_第6页

Exploratory Analyses of Sexual Size Dimorphism (SSD) and Sexual Dichromatism (SD) in Free-Living Adult Purple Herons (Ardea purpurea) 自由生活紫鹭成虫性别大小二态性和性别二色性的探索性分析

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-06-27 DOI: 10.1675/063.045.0314

Emanuele Fasola, F. Stefani, G. Forcina, M. Fasola, Enrico Viganò, A. Doroșencu, J. S. Monrós, M. Morganti

{"title":"Exploratory Analyses of Sexual Size Dimorphism (SSD) and Sexual Dichromatism (SD) in Free-Living Adult Purple Herons (Ardea purpurea)","authors":"Emanuele Fasola, F. Stefani, G. Forcina, M. Fasola, Enrico Viganò, A. Doroșencu, J. S. Monrós, M. Morganti","doi":"10.1675/063.045.0314","DOIUrl":"https://doi.org/10.1675/063.045.0314","url":null,"abstract":"Abstract. Ardeidae tend to exhibit low sexual dimorphism, both in size and plumage coloration, making sex attribution in the field challenging for both birdwatchers and ringers. Here, we assessed whether biometrics and plumage patterns are a good proxy for sex assignment in the Purple Heron (Ardea purpurea). We based our work on 27 molecularly-sexed free-living adults captured in Italy and Romania during the breeding season from 2018 to 2021. We found significant sexual size dimorphism in the beak, which resulted longer in males, but not in weight, wing, tarsus or sternum length. Birds with darker plumages, stronger contrast between reddish ornamental feathers and blackish mantle were classified as males, allowing for correct sex attribution in 70% of the males and 73 % of the females. On the one hand, we concluded that molecular sexing is the most reliable approach for sex attribution in this species. On the other hand, we also found that trained ringers or expert observers may achieve satisfactory sex attribution rates either based on biometrics or accurate plumage observation, possibly even from a distance.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78736852","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

Abundance Estimates for Marsh Bird Species in the Columbia Wetlands, British Columbia, Canada 加拿大不列颠哥伦比亚省哥伦比亚湿地湿地鸟类的丰度估算

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-06-27 DOI: 10.1675/063.045.0306

Rachel Darvill, Ashleigh M. Westphal, S. Flemming, M. Drever

{"title":"Abundance Estimates for Marsh Bird Species in the Columbia Wetlands, British Columbia, Canada","authors":"Rachel Darvill, Ashleigh M. Westphal, S. Flemming, M. Drever","doi":"10.1675/063.045.0306","DOIUrl":"https://doi.org/10.1675/063.045.0306","url":null,"abstract":"Abstract. The Columbia Wetlands are one of the largest contiguous wetland complexes in western North America. Current population estimates are necessary for designation of priority conservation areas and for reliable assessment of population status for species of conservation concern. This multi-year study (2016–2019) was designed to estimate abundances of focal and secondary marsh birds using standardized call-broadcast protocols and distance sampling methods. Abundances of focal species varied by year, and mean population estimates indicated the most abundant secretive marsh birds were Sora (Porzana carolina; 4605 birds), followed by American Coot (Fulica americana; 2358 birds), Virginia Rail (Rallus limicola; 2124 birds), and Pied-billed Grebe (Podilymbus podiceps; 1657 birds). Most abundant secondary species were Marsh Wren (Cistothorus palustris; 6328 birds), Red-winged Blackbird (Agelaius phoeniceus; 5422 birds), Yellow-headed Blackbird (Xanthocephalus xanthocephalus; 884 birds), and Wilson's Snipe (Gallinago delicata; 445 birds). Habitat covariates for detection functions varied by species, tended to include woody vegetation, tall vegetation, and open water; supporting previous studies proposing that a ‘hemi-marsh’ state is an important habitat condition for many marsh bird species. The Columbia Wetlands provide important wetland habitat and these estimates underscore the need for effective management for the conservation of British Columbia’s avifauna.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80536315","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: 2

Eggshell Maculation is Not a Signal of Maternal Condition in Two Species of Rail 两种秧鸡的蛋壳斑纹不是母系状况的信号

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-06-27 DOI: 10.1675/063.045.0303

Emily W. Johnson, S. B. McRae

{"title":"Eggshell Maculation is Not a Signal of Maternal Condition in Two Species of Rail","authors":"Emily W. Johnson, S. B. McRae","doi":"10.1675/063.045.0303","DOIUrl":"https://doi.org/10.1675/063.045.0303","url":null,"abstract":"Abstract. Eggshell pigments are costly to produce. The sexual signaling hypothesis predicts that the degree of pigmentation in eggshells is positively related to maternal quality. Thus, females in better condition are expected to lay brighter or more maculated eggs. To test this, we quantified the extent of maculation in eggshells of King Rails (Rallus elegans) and Common Moorhens (Gallinula chloropus chloropus) and related this to female body condition. We identified key variables for body condition using principal components analysis of morphometric measures. To evaluate which combination of variables provided the best index of body condition in each species, a series of linear models were ranked using AICc. To estimate the area of surface pigment on each egg, color egg images were converted to binary and we calculated the percent of black pixels within a scaled oval superimposed over the images. We ran linear regressions of mean percent pigmentation on maternal body condition. Neither female King Rails nor Common Moorhens in better body condition laid more maculated eggs. Thus, the sexual signaling hypothesis was not supported. Common Moorhen eggs were slightly larger, on average, and their eggshells had more pigment per unit area and per egg than King Rail eggs.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72549185","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

Potential Effects of Climate Change on the Distribution of American Flamingo (Phoenicopterus ruber) in Cuba 气候变化对古巴美洲火烈鸟(Phoenicopterus ruber)分布的潜在影响

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-06-27 DOI: 10.1675/063.045.0308

S. Aguilar, L. Mugica, Karen Aguilar, M. Acosta, L. Manica

{"title":"Potential Effects of Climate Change on the Distribution of American Flamingo (Phoenicopterus ruber) in Cuba","authors":"S. Aguilar, L. Mugica, Karen Aguilar, M. Acosta, L. Manica","doi":"10.1675/063.045.0308","DOIUrl":"https://doi.org/10.1675/063.045.0308","url":null,"abstract":"Abstract. Wetland-dependent birds are considered to be at particularly high risk for negative climate change effects. Bioclimatic models are widely used tools for assessing potential responses of species to climate change. We predicted current and future distributions of American Flamingo (Phoenicopterus ruber; Family Phoenicopteridae), a resident species in Cuba, using ecological niche models in combination with climate data in Maxent software. We predicted four potential future distributions in Cuba under two emissions scenarios in both 2050 and 2070, combining three Global Circulation Models. Bioclimatic variables that contributed the most to modelled distributions of American Flamingo were mean diurnal temperature range [mean of monthly (max temp - min temp)], temperature seasonality, and precipitation of wettest quarter. Our results predict that the current distribution of American Flamingo will be reduced by 38% in a changing future climate under the most pessimistic scenario of 2070. The potential suitable habitat of American Flamingo under this same scenario would be 51% excluded from the National System of Protected Areas of Cuba. Species distribution modeling can inform the current and future management of the American Flamingo throughout Cuba, and our findings suggest a strong conservation strategy is needed to conserve American Flamingo populations under a changing climate.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76295022","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

First Documentation of King Rail (Rallus elegans) Reproduction in Arkansas Since 2006 自2006年以来，阿肯色州首次记录了国王Rail (Rallus elegans)的繁殖

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-06-27 DOI: 10.1675/063.045.0313

Gabrielle M. Hargrove, D. Osborne

{"title":"First Documentation of King Rail (Rallus elegans) Reproduction in Arkansas Since 2006","authors":"Gabrielle M. Hargrove, D. Osborne","doi":"10.1675/063.045.0313","DOIUrl":"https://doi.org/10.1675/063.045.0313","url":null,"abstract":"Abstract. Changing agricultural practices and wetland loss have resulted in the decline in abundance of King Rail (Rallus elegans) populations throughout the southeastern United States, including within the historical breeding range of the Mississippi Alluvial Valley region in eastern Arkansas. Despite a recent increase in coordinated efforts to improve monitoring program for secretive marsh birds and to track trends in population status of the King Rail, successful observations of reproduction by the species are rare throughout much of the historical breeding range. During a field visit and birding trip on 15 June 2018, we obtained photographic documentation of adult and juvenile King Rails in an emergent marsh impoundment on the Freddie Black Choctaw Island Wildlife Management Area Deer Research West Unit in Desha County, Arkansas (eBird Checklist S46788433). This emergent marsh wetland is a product of intensive wetland restoration through the Wetland Reserve Program. This is the first documented observation of King Rail reproduction in Arkansas since 2006. This observation provides a tribute to the Wetland Reserve Program and demonstrates the impacts wetland restoration can have on species of greatest conservation concern. Lastly, the observation is a tribute to the active management program of the Arkansas Game and Fish Commission aimed to maintain important emergent marsh wetland habitat conditions for migratory waterbirds during the breeding season.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82620804","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

Sex Determination of Juvenile Harlequin Ducks Histrionicus histrionicus Using Morphometric Data 利用形态计量学数据确定小丑鸭幼鸭的性别

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-06-27 DOI: 10.1675/063.045.0305

Cyndi M. Smith, W. Hansen, Lisa J. Bate

{"title":"Sex Determination of Juvenile Harlequin Ducks Histrionicus histrionicus Using Morphometric Data","authors":"Cyndi M. Smith, W. Hansen, Lisa J. Bate","doi":"10.1675/063.045.0305","DOIUrl":"https://doi.org/10.1675/063.045.0305","url":null,"abstract":"Abstract. Harlequin Ducks (Histrionicus histrionicus) were captured on breeding streams in Alberta, Canada from 1995–2018. Measurements for exposed culmen, tarsus bone, and wing length, and mass, were significantly larger for adult males than those for adult females, while only tarsus was significantly larger for male ducklings than for females. The repeatability of tarsus and culmen measurements across time for the same individuals was significantly different from 0, indicating high consistency. We used logistic regression of culmen and tarsus length of adult ducks to identify the best model to predict the sex of adults, then constructed a classification and regression tree to predict the sex of a test set of juveniles that had been banded and sexed as ducklings but that were sexed by plumage when resighted as adults. The model with the highest accuracy (96.9%) and lowest number of individuals in the zone of uncertainty (thus sexed as unknown) was tarsus < 37.5 mm (classify as females) or ≥ 38.0 mm (classify as males). Individuals in the zone of uncertainty with a penis sheath should be sexed as male, but individuals without a penis sheath that do not match the appropriate tarsus length should be sexed as unknown.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85184227","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

Influenza a in Shorebirds in the Tropical Landscape of Guatemala 危地马拉热带地区滨鸟的a型流感

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-06-27 DOI: 10.1675/063.045.0315

Dione Méndez, D. Moran, Lucia Ortiz, C. Cordón-Rosales

{"title":"Influenza a in Shorebirds in the Tropical Landscape of Guatemala","authors":"Dione Méndez, D. Moran, Lucia Ortiz, C. Cordón-Rosales","doi":"10.1675/063.045.0315","DOIUrl":"https://doi.org/10.1675/063.045.0315","url":null,"abstract":"Abstract. Information on Influenza A virus (IAV) prevalence in shorebird populations in Guatemala is scarce, and no live captures of shorebirds have been made for this purpose. The only reported case of Influenza A in shorebirds in Guatemala corresponded to a harvested individual. To update and obtain information of IAV in shorebirds, a transversal study was made on the South Coast of Guatemala. The main objective of this study was to evaluate presence of Influenza A among migratory shorebirds in stopover areas in the country. Captures and sampling took place in three sites during migration (October–April) over three migratory periods (2016–2017, 2017–2018, and 2018–2019). In total, 127 shorebirds belonging to 14 species of genera Calidris, Charadrius, Tringa, and Actitis were captured using mist nets. Tracheal and cloacal swabs were collected from each bird using a cotton swab, then tested with RT-PCR techniques targeting Influenza A. Blood samples were taken from the jugular or basilic vein to obtain serum that later was tested using a commercial ELISA Kit for detection of antibodies against Influenza A. Birds were released after sampling. All samples were PCR negative (0/127).One sandpiper specimen (Calidris minutilla) tested sero-positive to Influenza A through the ELISA test (1/122). These results suggest that IAV infection in this region may be minimal, as other studies have reported; nevertheless, it is important to consider that sample size was small in this study, and that the species included may not be the best indicators.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78958385","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

Overland Flights of Terns and Consequent High Exposure to Polychlorinated Biphenyls (PCBs) in Northwest France in the 1970S 20世纪70年代法国西北部燕鸥的陆路飞行及其对多氯联苯的高度暴露

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-06-27 DOI: 10.1675/063.045.0312

I. Nisbet, David Cabot, Karl Partridge

引用次数: 0

Netgun Capture Technique for the Western Grebe Aechmophorus occidentalis 网枪捕获法捕获西部棘鼠

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-06-27 DOI: 10.1675/063.045.0316

David Dorado

引用次数: 1

Comparing In-Person Versus Camera Monitoring of Shorebird Reproductive Success 比较现场与摄像机监测的滨鸟繁殖成功

IF 0.3 4区生物学

Waterbirds Pub Date : 2023-06-27 DOI: 10.1675/063.045.0310

Mikayla N. Call, A. Wilke, Zak Poulton, R. Boettcher, S. Karpanty, Eunbi Kwon, Aylett Lipford, Emily D. Gardner, Logan Anderson, J. Fraser, D. Catlin, C. Wails

{"title":"Comparing In-Person Versus Camera Monitoring of Shorebird Reproductive Success","authors":"Mikayla N. Call, A. Wilke, Zak Poulton, R. Boettcher, S. Karpanty, Eunbi Kwon, Aylett Lipford, Emily D. Gardner, Logan Anderson, J. Fraser, D. Catlin, C. Wails","doi":"10.1675/063.045.0310","DOIUrl":"https://doi.org/10.1675/063.045.0310","url":null,"abstract":"Abstract. Shorebird reproductive success monitoring often relies on surveys of nest and brood survival. However, conclusions may be inaccurate due to the challenges of gathering and interpreting evidence of nest and brood fate. We tested the efficacy of in-person versus camera-based monitoring to quantify productivity and evaluate threats to reproductive success of American Oystercatchers (Haematopus palliatus) and Piping Plovers (Charadrius melodus) at Metompkin Island, Virginia. We deployed 73 cameras using three set-ups: at nests, at brood sites, and along a transect. The same areas were also surveyed in-person approximately once per week. Camera monitoring confirmed nest fate where in-person monitors could not determine fate from field evidence and provided insight to the effectiveness of mammalian predator removal. However, cameras failed to capture causes of mortality for mobile chicks and did not consistently document chicks where in-person monitoring confirmed successful broods. Cameras produced large quantities of data requiring 63.5–315 hours to review, depending on camera set-up. We found cameras were useful for validating conclusions from in-person monitoring, highlighting threats that surveys missed, and characterizing the predator community. Managers should consider the tradeoff between potential benefits and required effort of camera monitoring when deciding which method would be effective for meeting management goals.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73984187","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