Ibis最新文献

{"title":"Moult is associated with higher diversity of food items in the diet of Common Bulbuls (Pycnonotus barbatus) in Cameroon","authors":"Crinan Jarrett,&nbsp;Chima J. Nwaogu,&nbsp;Christian N. Tchana,&nbsp;Michelle F. M. Kamkeng,&nbsp;Alma L. S. Quiñones,&nbsp;Monica C. Olguin-Villa,&nbsp;Barbara Helm,&nbsp;Luke L. Powell,&nbsp;Andreanna J. Welch","doi":"10.1111/ibi.13395","DOIUrl":"https://doi.org/10.1111/ibi.13395","url":null,"abstract":"<p>Moult is an essential part of birds' annual cycle, and requires sufficient intake of energy and nutrients, but we understand little about how such nutritional requirements are met by wild birds. Using faecal metabarcoding, we analysed the diet of moulting and non-moulting Common Bulbuls <i>Pycnonotus barbatus</i>, captured in Cameroon. We found that the diet of moulting birds was more diverse than that of non-moulting birds, with approximately 1.5 times more arthropod and plant taxa, plus evidence of dietary composition differences between groups. Our results provide novel insight of a likely strategy used by wild birds to fuel the essential self-maintenance task of moult.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"803-811"},"PeriodicalIF":1.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13395","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pollen analysis as a tool to advance avian research and inform conservation strategies","authors":"Anne E. Goodenough,&nbsp;Julia C. Webb","doi":"10.1111/ibi.13394","DOIUrl":"https://doi.org/10.1111/ibi.13394","url":null,"abstract":"<p>Ornithologists use many methods to advance understanding of birds and inform conservation strategies. These include field methods (e.g. censusing, ringing), laboratory analysis (e.g. molecular taxonomy, microbiology) and computational approaches (e.g. population modelling, habitat suitability mapping). Indirect metrics can also be important: for example, ptilochronology as a proxy for food availability and dominance hierarchies, stable isotopes as a proxy for diet and first egg dates as a proxy for phenological responses to climate change. Recently, the potential to use palynology – the study of pollen and spores – in ecology has become increasingly recognized, but there has been no specific appraisal of the utility of palynology in ornithology. In this scoping review, we synthesize research undertaken over 70 years across all seven continents covering the many diverse ways in which studying pollen associated with birds can advance ornithological understanding and inform conservation strategies. We critique the use of palynology both directly and as a proxy to study avian habitat use, migration ecology, diet and feeding strategies, and population dynamics, offering constructive suggestions for future research at the end of each thematic section. We also explore the potential for analysing pollen on birds (or within avian deposits such as guano) to answer wider questions, especially in relation to pollination and environmental reconstruction, thereby offering cross-disciplinary collaborative research ideas. We conclude that the potential for uniting ornithology and palynology within the research and conservation contexts is as extensive as it is exciting and urge avian biologists to think broadly about new opportunities.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"615-631"},"PeriodicalIF":1.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cooperative and plural breeding by the precocial Vulturine Guineafowl","authors":"Brendah Nyaguthii,&nbsp;Tobit Dehnen,&nbsp;James A. Klarevas-Irby,&nbsp;Danai Papageorgiou,&nbsp;Joseph Kosgey,&nbsp;Damien R. Farine","doi":"10.1111/ibi.13393","DOIUrl":"https://doi.org/10.1111/ibi.13393","url":null,"abstract":"<p>Cooperative breeding in birds is thought to be more common in altricial species, with few described cases in precocial species. However, cooperative breeding may also be more difficult to detect in precocial species and could have been overlooked. We investigated whether precocial Vulturine Guineafowl <i>Acryllium vulturinum</i> breed cooperatively and, if so, how care is distributed among group members. We collected data from 51 uniquely marked individuals (27 males, 24 females), of which 13 females bred at least once over three different breeding seasons. We found that broods had close associates comprising both adults and subadults that exhibited four distinct cooperative breeding behaviours: babysitting, chick guarding, covering the chicks and calling the chicks to food. Further, we found that offspring care is significantly male-biased, that non-mother individuals provided most of the care that each brood received, that breeding females differed in how much help they received and that carers pay a foraging cost when providing care. In line with many other birds, we found that females received help from their sons. Our results confirm that Vulturine Guineafowl are cooperative and plural breeders and add to growing evidence that cooperative breeding may be more widespread among species with precocial young than previously thought, thereby providing a counterpoint to the altriciality–cooperative breeding hypothesis.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"695-710"},"PeriodicalIF":1.8,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13393","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ecological drivers of variation in the extent of the post-fledging dependence period in the largest group of diurnal raptors","authors":"Diego Gallego-García,&nbsp;José Hernán Sarasola","doi":"10.1111/ibi.13392","DOIUrl":"https://doi.org/10.1111/ibi.13392","url":null,"abstract":"<p>The post-fledging dependence period (PFDP) is a fundamental stage in the life cycle of altricial birds that influences their long-term survival and fitness. However, research on the duration of this period in raptors, and on the factors affecting it, is scarce. We performed the first literature review on the length of the PFDP in Accipitridae, the largest family among diurnal raptors, and a meta-analysis examining the effects of breeding latitude and hemisphere, body weight and migratory status, controlling for species phylogeny. Hypotheses were tested at the levels of both species and populations. The length of the PFDP is known for less than half of Accipitridae species, with no data for two-thirds of the threatened and near-threatened species. Larger species and individuals breeding at lower latitudes showed a longer PFDP, as did non-migrants and southern-hemisphere breeders. The effect of latitude was more marked in larger species, in resident populations and in southern-hemisphere breeders. This extended PFDP in larger and tropical raptors may promote juvenile survival. Migration timing and the effects of continentality in the northern hemisphere constrain the PFDP. These findings highlight the importance of encouraging the study of this key, but poorly known, life-cycle stage of raptors.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 2","pages":"345-356"},"PeriodicalIF":1.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143646246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological differences between wild and game-farm Mallards (Anas platyrhynchos) in North America","authors":"Susannah L. Halligan,&nbsp;Michael L. Schummer,&nbsp;Auriel M. V. Fournier,&nbsp;Philip Lavretsky,&nbsp;J. Brian Davis,&nbsp;Cynthia J. Downs,&nbsp;Vergie Musni","doi":"10.1111/ibi.13391","DOIUrl":"https://doi.org/10.1111/ibi.13391","url":null,"abstract":"<p>Large-scale releases of domesticated, game-farm Mallards <i>Anas platyrhynchos</i> to supplement wild populations have resulted in widespread introgressive hybridization that changed the genetic constitution of wild populations in eastern North America. The resulting gene flow is well documented between game-farm and wild Mallards, but the mechanistic consequences from such interactions remain unknown in North America. We provide the first study to characterize and investigate potential differences in morphology between genetically known, wild and game-farm Mallards in North America. We used nine morphological measurements to discriminate between wild and game-farm Mallards with 96% accuracy. Compared with their wild counterparts, game-farm Mallards had longer bodies and tarsi, shorter heads and wings, and shorter, wider and taller bills. The nail on the end of the bill of game-farm Mallards was longer, and game-farm Mallard bills had a greater lamellae:bill length ratio than wild Mallards. Differences in body morphologies between wild and game-farm Mallards are consistent with an artificial, terrestrial life whereby game-farm Mallards are fed pelleted foods, resulting in artificial selection for a more ‘goose-like’ bill. We posit that: (1) game-farm Mallards have diverged from their wild ancestral traits of flying and filter feeding towards becoming optimized to run and peck for food; (2) game-farm morphological traits optimized over the last 400 years in domestic environments are likely to be maladaptive in the wild; and (3) the introgression of such traits into wild populations is likely to reduce fitness. Understanding the effects of game-farm Mallard introgression requires analysis of various game-farm × wild hybrid generations to determine how domestically derived traits persist or diminish with each generation.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"720-733"},"PeriodicalIF":1.8,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13391","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using model-based distance sampling to estimate decadal population change in Northern Gannets (Morus bassanus) across periods spanned by different at-sea survey methods","authors":"T.J. Clark-Wolf,&nbsp;David L. Miller,&nbsp;Hannah Drake,&nbsp;David A. Fifield,&nbsp;Jean-François Rail,&nbsp;Ewan D. Wakefield,&nbsp;Sabina I. Wilhelm,&nbsp;Sarah N.P. Wong,&nbsp;Carina Gjerdrum","doi":"10.1111/ibi.13387","DOIUrl":"https://doi.org/10.1111/ibi.13387","url":null,"abstract":"<p>Seabirds are important sentinels of climate and ecosystem change, but many breeding populations are difficult to monitor because of the remoteness and inaccessibility of their colonies, and the sometimes cryptic nature of their nests and burrows. Large-scale monitoring of seabird populations at sea can also be used to estimate population trends and inform conservation efforts. However, although modern survey techniques can be used to estimate absolute abundance, many older survey methodologies have recorded only relative, and possibly biased, abundance. These approaches are exemplified in the western North Atlantic, where seabirds have been surveyed at sea using modern methods (Eastern Canada Seabirds at Sea, or ECSAS) since 2006, but under the simpler PIROP (<i>Programme intégré de recherches sur les oiseaux pélagiques</i>) protocol from 1965 to 1992. Methodological differences between these survey types limit our understanding of long-term trends in seabird populations, both in the western North Atlantic and elsewhere. Hence, we conducted simultaneous surveys using both methods from 2014 to 2021 and used advances in model-based distance sampling to allow comparison across these longer-term datasets. We validated our methodology by comparing population trends of Northern Gannets <i>Morus bassanus</i> using the at-sea data and breeding colony surveys. The trend in abundance at sea (2.69% increase annually) was similar to that at breeding colonies (2.91% increase annually), suggesting that our combined approach can be used to estimate seabird population changes robustly across the period spanned by the two survey programmes. We envision that analyses using similar combined survey methods could reveal decadal population trends and changes in conservation status of many seabird species that currently lack such information because of the absence of colony counts.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"776-788"},"PeriodicalIF":1.8,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13387","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A focus on females can improve science and conservation","authors":"Joanna X. Wu,&nbsp;Martha A. Harbison,&nbsp;Stephanie Beilke,&nbsp;Purbita Saha,&nbsp;Brooke L. Bateman","doi":"10.1111/ibi.13386","DOIUrl":"https://doi.org/10.1111/ibi.13386","url":null,"abstract":"<p>As a field, ecology has historically misunderstood or overlooked female organisms, or assumed that they are ‘similar enough’ to males. The typical unit of study for ecology research stops at the species level, but that can be too coarse and can obscure important intraspecific differences. Projecting the results of studies based on only half of the population (i.e. males) onto females can be misleading, if not dangerous, as female birds differ from males in key aspects of their biology. Birds are widespread and can be sexed more often than most other taxa; yet although it uses them as model organisms, current ornithological research is disproportionately based on male birds. We review some fields pertinent to ecology and conservation and highlight biases and key research gaps. We find that, counter to ‘traditional’ assumptions, reproductive roles are balanced between sexes across many, but not all, species. In addition, female birds sing, tend to be more dispersive than males, have lower survival, often use different habitats – which has implications for conservation – and may be affected by climate change differently. We call for ornithologists to study sexes separately because the lack of attention to these differences has real-world conservation implications. Potential solutions include training observers to recognize female traits, using more field methods that increase the detection of female birds (e.g. catching birds during the migration season, using DNA to determine sex), broadening geographical regions of study and recruiting a diverse group of scientists to help equalize the field of ornithological research.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"819-827"},"PeriodicalIF":1.8,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13386","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stable isotope evidence for suspended moult and age-related differences in moult location in the trans-Saharan migratory Alpine Swift","authors":"Alexandra L. Brighten,&nbsp;Pierre Bize,&nbsp;Ana Payo-Payo,&nbsp;Christoph M. Meier,&nbsp;Jason Newton,&nbsp;Thomas W. Bodey","doi":"10.1111/ibi.13389","DOIUrl":"https://doi.org/10.1111/ibi.13389","url":null,"abstract":"<p>Stable isotope analysis has been used extensively in migratory bird studies to provide ecological insights that may otherwise be difficult to obtain. However, an understanding of moult is critical for appropriate feather sampling, and here we make the first assessment of its relevance for examining the non-breeding ecology of the Alpine Swift <i>Tachymarptis melba</i>, a long-distance Afro-Palaearctic migrant. We sampled three feather types from birds found dead after their return from migration and investigated variability in <i>δ</i>¹³C, <i>δ</i>¹⁵N and <i>δ</i>²H within and among feathers and between age classes. We found isotopic evidence supporting an interrupted primary moult in adults, with the innermost primary of adults (known to be moulted on the breeding grounds) significantly depleted in ¹³C and ²H compared with either the outermost primary or outermost tail feather, both of which were representative of sub-Saharan non-breeding areas. In contrast, the absence of significant differences in immature birds suggests the probable existence of a non-migratory strategy within this age class. These isotopic insights into moult and life history highlight the potential for stable isotope analysis as a tool for investigating non-breeding strategies in the Alpine Swift.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 2","pages":"583-590"},"PeriodicalIF":1.8,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13389","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143646153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic changes in the avian gut microbiome in response to diverse lifestyles","authors":"Lingxue Li,&nbsp;Julan Ye,&nbsp;Meichen Yu,&nbsp;Jiaxuan Jiang,&nbsp;Xinyu Guo,&nbsp;Weijian Yu,&nbsp;Ke Rong","doi":"10.1111/ibi.13388","DOIUrl":"https://doi.org/10.1111/ibi.13388","url":null,"abstract":"<p>Investigating the intestinal microbiome and its interactions with the host is crucial for understanding the adaptation mechanisms, functional dynamics and co-evolution of these microbiomes in wild birds. This review examines how gut microbiomes interact with their avian hosts, focusing on the establishment of gut microbiomes, the dynamic changes occurring throughout different life stages and the factors that influence microbial variations. It also explores the evolutionary relationship between birds and their microbial symbionts, and identifies key areas for future research on avian gut microbes to advance wildlife microbiology.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 2","pages":"331-344"},"PeriodicalIF":1.8,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143646272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Immature Northern Gannets (Morus bassanus) increase colony attendance following highly pathogenic avian influenza","authors":"Madeline P. Sceviour,&nbsp;Christopher R. E. Ward,&nbsp;Sabina I. Wilhelm","doi":"10.1111/ibi.13390","DOIUrl":"https://doi.org/10.1111/ibi.13390","url":null,"abstract":"<p>The emergence of Highly Pathogenic Avian Influenza (HPAI) H5N1 in wild bird populations in 2020 changed the landscape of this disease for seabird populations, including Northern Gannets <i>Morus bassanus</i>. In 2023, we photographed the three Northern Gannet colonies in Newfoundland and Labrador, Canada (Funk Island, Baccalieu Island and Cape St Mary's), following an HPAI outbreak in 2022 and documented an overall 43% decline in apparently occupied sites (AOS) from the last population survey in 2018. During the photo analyses, we assigned immature birds present in the core breeding area to one of four age categories according to their plumage characteristics, and estimated that 9% (inter-colony variance ranging from 7 to 14%) of all AOS in 2023 hosted at least one immature bird, an increase compared with rates of 2% or less before the outbreak. Further, 16% of all immature birds present in the core breeding area showed evidence of breeding and were probably 2- and 3-year-old birds. Our results support the social competition theory whereby a higher proportion of immature and/or younger immature birds occupying an AOS within the core breeding area is observed following significant reductions in numbers of established breeders, suggesting the presence of a pool of immature birds capable of recruiting into the Newfoundland Northern Gannet breeding population and help its recovery.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"711-719"},"PeriodicalIF":1.8,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13390","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}