Ibis最新文献

{"title":"Estimating the mass of the Great Auk (Pinguinus impennis) and its egg","authors":"Robert D. Montgomerie, Tim R. Birkhead","doi":"10.1111/ibi.13350","DOIUrl":"https://doi.org/10.1111/ibi.13350","url":null,"abstract":"The body mass and egg mass of the Great Auk <jats:italic>Pinguinus impennis</jats:italic> were never measured before the bird was driven to extinction in 1844. Previous studies conducted before 1990 used data from related species to estimate the mass of an adult bird at 4500–5000 g, and the fresh mass of its egg as 327–372 g. In the present study, we use a larger dataset of measurements from extant alcids, and statistical methods that control for the effects of phylogeny, to provide new estimates for those traits. The presumed body mass of the Great Auk was initially derived from a hearsay report from the 18th century, and then supported by subsequent comparative analyses based on skeletal measurements. Our new best estimates from currently available data show that the Great Auk's body mass was probably closer to 3560 g and its fresh egg mass was about 350 g. This new body mass estimate is the average of predictions from independent regressions of body mass on (1) tibiotarsus and femur lengths (3441 g) and (2) egg volume (3681 g). We calculated the Great Auk's fresh egg mass from a regression of fresh egg mass on egg volume in the extant alcids. Providing more accurate estimates of the body and egg mass of Great Auk can inform speculation about the developmental mode, ecology and life history of this iconic, extinct species.","PeriodicalId":13254,"journal":{"name":"Ibis","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782053","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":"Diet diversity, individual heterozygosity and habitat heterogeneity influence health parameters in Eurasian Kestrels (Falco tinnunculus)","authors":"Lukas Hochleitner, Erkki Korpimäki, Nayden Chakarov, Caroline Isaksson, Carina Nebel, Swen C. Renner, Ville Vasko, Christian C. Voigt, Julien Terraube, Petra Sumasgutner","doi":"10.1111/ibi.13345","DOIUrl":"https://doi.org/10.1111/ibi.13345","url":null,"abstract":"The loss of habitat heterogeneity due to agricultural intensification has led to a global decline in farmland birds. Among them is the Eurasian Kestrel <jats:italic>Falco tinnunculus</jats:italic>, which occupies high trophic levels and may be adversely affected by reduced food quantity or quality and consequent health impacts. In this study, we investigate the effects of habitat heterogeneity, individual heterozygosity and diet diversity on five different health indices (integument coloration, dietary antioxidants, haematocrit, body condition and parasite infection). The study was conducted in farmland areas of western Finland during a year of exceptionally low vole abundance. We found no obvious relationship between diet diversity and habitat heterogeneity. An interaction between diet diversity and individual heterozygosity in females suggested that diet specialists were able to maintain more intensely coloured integuments only if they had higher genetic diversity. In addition, more heterozygous females were less likely to be infected with <jats:italic>Haemoproteus</jats:italic> than females with lower individual genetic diversity. Finally, specialist males with lower diet diversity had higher body condition than males with a more generalist diet. Our results suggest that variation in individual quality and foraging ecology should be considered in conjunction with spatial variation in habitat heterogeneity to understand sex‐specific variation in kestrel health. These findings add to a better understanding of the mechanisms linking land‐use change to health indices in a common avian predator, which can be used as a health sentinel in European agroecosystems.","PeriodicalId":13254,"journal":{"name":"Ibis","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738045","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":"Experimental manipulation of nest temperature and relative humidity reduces ectoparasites and affects body condition of Blue Tits (Cyanistes caeruleus)","authors":"Marina García‐del Río, Alejandro Cantarero, Francisco Castaño‐Vázquez, Yago Merino, Javier García‐Velasco, Santiago Merino","doi":"10.1111/ibi.13346","DOIUrl":"https://doi.org/10.1111/ibi.13346","url":null,"abstract":"Many models predict changes in the distribution and incidence of diseases associated with climate change. However, studies exploring the effect of microclimatic changes on host–parasite relationships are scarce. In this study, we increased temperature or humidity in Eurasian Blue Tit <jats:italic>Cyanistes caeruleus</jats:italic> nestboxes during the breeding season, to analyse the effect of each variable on the abundance of ectoparasites and, also, on the body condition of the hosts. Temperature and humidity were experimentally increased on average by about 2°C and 15%, respectively. The abundance of blowfly <jats:italic>Protocalliphora azurea</jats:italic> pupae was significantly reduced in nests with increased temperature compared with control nests and those with increased humidity, and was also significantly reduced in nests with increased humidity compared with control nests. The abundance of mites <jats:italic>Dermanyssus</jats:italic> spp. was significantly reduced in nests with increased humidity. However, there was no significant effect of the experiment on the abundance of flea <jats:italic>Ceratophyllus gallinae</jats:italic> larvae, biting midges (<jats:italic>Culicoides</jats:italic> spp.) and blackflies (Simuliidae). The body condition of nestlings was lower in nests with increased humidity and slightly lower in heated nests. However, the body condition of adults was not significantly affected by the experiment. In addition, blowfly pupae and biting midge abundance were negatively related to the body condition of the nestlings, and biting midge abundance was also negatively related to the body condition of the adults. Overall, an increase in temperature and humidity reduces the abundance of ectoparasites, which suggests that these parasites are sensitive to sudden changes in the microclimate in which they develop. Moreover, these fluctuations negatively affect the body condition of Blue Tit nestlings despite the concurrent decrease of parasites in nests. In other words, the expected benefit to the nestlings from the reduction in parasites does not occur because the microclimate also adversely affects nestlings, probably affecting their heat exchange with the nest environment.","PeriodicalId":13254,"journal":{"name":"Ibis","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141585213","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":"Body mass, diet, foraging strata and foraging behaviour predict variation in the propensity to join mixed-species flocks across birds","authors":"Guy Beauchamp,&nbsp;G. Giselle Mangini","doi":"10.1111/ibi.13342","DOIUrl":"10.1111/ibi.13342","url":null,"abstract":"<p>Mixed-species flocking is common in birds and is associated with increased foraging efficiency and reduced predation pressure. The propensity to join mixed-species flocks within a community varies across species, possibly reflecting species-specific needs for increased protection from predators, opportunities to increase foraging efficiency or both. Previous studies on predictors of mixed-species flocking propensity across species have typically focused on local communities, with or without accounting for phylogenetic relatedness. Here, we examined predictors of mixed-species flocking propensity across the published literature using a phylogenetic linear mixed model framework. We obtained 724 mixed-species flocking propensity estimates from 31 different study sites located primarily in South America and East Asia. Flocking propensity was associated with diet, foraging strata and foraging behaviour, and was inversely related to body mass. Controlling for phylogeny and body mass, flocking propensity was significantly lower for nectarivores than for species with other diets, lower for species foraging on the ground than in higher strata, and lower for sallying species than for bark and near-perch foragers. These results suggest that variation across species in the tendency to join mixed-species flocks can be predicted from knowledge about various species-specific ecological traits in birds.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141546464","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":"Early Neolithic avifaunal remains from southeast Anatolia provide insight into Early Holocene species distributions and long-term shifts in their range","authors":"Nadja Pöllath,&nbsp;Joris Peters","doi":"10.1111/ibi.13341","DOIUrl":"10.1111/ibi.13341","url":null,"abstract":"<p>Based on the species-rich avifaunas from Early Neolithic sites across Upper Mesopotamia (southeast Türkiye, northern Syria, northern Iraq), we compared seven species' Early Holocene distribution patterns with that of their modern species ranges. The avifaunal remains from four sites were analysed by the authors and bird identifications from 10 additional sites were extracted from published reports. In the case of the Common Crane <i>Grus grus</i>, Grey Partridge <i>Perdix perdix</i> and Black Francolin <i>Francolinus francolinus</i>, shifts in distributions relate to significant changes in climate marking the transition from the Pleistocene to the Holocene. In contrast, the massive decline of the Griffon Vulture <i>Gyps fulvus</i> represents a more recent phenomenon related to anthropogenic impact on their habitats and food sources. For the Black-bellied Sandgrouse <i>Pterocles orientalis</i> and the Pin-tailed Sandgrouse <i>P. alchata,</i> changes in distributional range from the Early Holocene to the present could not be detected. Finally, a single bone of Macqueen's Bustard <i>Chlamydotis macqueenii</i> at Göbekli Tepe is unexpected and conceivably we are dealing with the remains of a rare vagrant, more likely to be found in dry steppe and desert habitats, which were located south of the study area at that time. This study highlights the value of archaeozoological finds in helping to understand how species distributional ranges have changed over time. Similarly, our work suggests that authors studying archaeozoological data should not assume that present-day distributional ranges of taxa of interest represent the ranges of these species in the past.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13341","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514837","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":"Estimating sampling biases in citizen science datasets","authors":"Louis J. Backstrom, Corey T. Callaghan, Hannah Worthington, Richard A. Fuller, Alison Johnston","doi":"10.1111/ibi.13343","DOIUrl":"https://doi.org/10.1111/ibi.13343","url":null,"abstract":"The rise of citizen science (also called community science) has led to vast quantities of species observation data collected by members of the public. Citizen science data tend to be unevenly distributed across space and time, but the treatment of sampling bias varies between studies, and interactions between different biases are often overlooked. We present a method for conceptualizing and estimating spatial and temporal sampling biases, and interactions between them. We use this method to estimate sampling biases in an example ornithological citizen science dataset from eBird in Brisbane City, Australia. We then explore the effects of these sampling biases on subsequent model inference of population trends, using both a simulation study and an application of the same trend models to the Brisbane eBird dataset. We find varying levels of sampling bias in the Brisbane eBird dataset across temporal and spatial scales, and evidence for interactions between biases. Several of the sampling biases we identified differ from those described in the literature for other datasets, with protected areas being undersampled in the city, and only limited seasonal sampling bias. We demonstrate variable performance of trend models under different sampling bias scenarios, with more complex biases being associated with typically poorer trend estimates. Sampling biases are important to consider when analysing ecological datasets, and analysts can use this method to ensure that any biologically relevant sampling biases are detected and given due consideration during analysis. With appropriate model specification, the effects of sampling biases can be reduced to yield reliable information about biodiversity.","PeriodicalId":13254,"journal":{"name":"Ibis","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504956","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":"Life in the fast and slow lanes: contrasting timing of annual cycle events in high- and mid-latitude breeding Whooper Swans (Cygnus cygnus)","authors":"Wenxin Liu,&nbsp;Junjian Zhang,&nbsp;Tetsuo Shimada,&nbsp;Yanlei Liu,&nbsp;Yanbo Xie,&nbsp;Nyambayar Batbayar,&nbsp;Hiroyoshi Higuchi,&nbsp;Iderbat Damba,&nbsp;Lei Cao,&nbsp;Anthony D. Fox","doi":"10.1111/ibi.13339","DOIUrl":"10.1111/ibi.13339","url":null,"abstract":"<p>Shorter duration of ice-free conditions at successively northern latitudes increasingly constrains large-bodied waterbirds from completing their reproductive cycle before freeze-up, affecting their migration and breeding schedules. We compared migration timing and duration of stay in summering areas between 127 tracked East Asian Whooper Swans <i>Cygnus cygnus</i> breeding at high latitude (HLP, 67°N, Japan wintering) and mid-latitude (MLP, 48°N, China wintering) based on tracking and remote-sensing data. Adult breeding site arrival dates were positively correlated with latitude. HLP adults arrived just before 50% snow melt, and summered for 142 days (the duration of the ice-free period there), just over the c.130 days required to hatch and raise cygnets to fledging. MLP adults arrived 3 weeks after 50% snow melt, and summered for c.209 days (c.80% of the total ice-free period of 267 days), laying eggs c.33 days after arrival. These results suggest that HLP breeders were more likely to invest stored nutrients and energy brought from winter quarters and/or on migration to enable rapid egg-laying post-arrival at the breeding grounds (a more ‘capital’ breeding strategy). By contrast, MLP females appear able to obtain most, if not all, of their energetic and nutritional reproductive needs exogenously post-arrival at breeding areas (a more ‘income’ breeding strategy). HLP individuals left the breeding grounds before MLP, but all departed before freeze-up. Migration duration did not differ between the two groups, so differential summer residency times affected duration on wintering areas. We recommend follow-up investigations of the relative degree of capital/income investment among birds from both groups and their effects on their respective demographics, population dynamics and growth rates.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504955","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":"No detrimental effects of wing-harnessed GPS devices on the breeding performance of Yellow-legged Gulls (Larus michahellis): A multi-colony evaluation","authors":"Charly Souc,&nbsp;Carole Leray,&nbsp;Thomas Blanchon,&nbsp;Thomas Dagonet,&nbsp;Marion Vittecoq,&nbsp;Raül Ramos,&nbsp;Karen D. McCoy","doi":"10.1111/ibi.13338","DOIUrl":"10.1111/ibi.13338","url":null,"abstract":"<p>A recent study revealed that wing-harnessed tracking devices negatively affected reproductive success of Great Black-backed Gulls <i>Larus marinus</i>. To evaluate the generality of this effect in large gulls, we investigated the reproductive performance associated with the same type of GPS-mounted system in four Mediterranean breeding colonies of the Yellow-legged Gull <i>Larus michahellis</i> in 2022. We found no significant difference in reproductive parameters among adults handled with a mounted device, adults handled with no device, and controls, and no interaction with colony of origin. The impact of the GPS harness system on short-term reproduction is therefore not generalizable among larid species, and should be tested and reported whenever a new tracking programme is employed.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13338","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504957","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 new species of nightjar (Caprimulgus) from Timor and Wetar, Lesser Sunda Islands, Wallacea","authors":"Ben F. King,&nbsp;George Sangster,&nbsp;Colin R. Trainor,&nbsp;Martin Irestedt,&nbsp;Dewi M. Prawiradilaga,&nbsp;Per G. P. Ericson","doi":"10.1111/ibi.13340","DOIUrl":"10.1111/ibi.13340","url":null,"abstract":"<p>The nightjars of the <i>Caprimulgus macrurus</i> complex are distributed from Pakistan to Australia and comprise six morphologically similar but vocally distinct species. Fieldwork on Timor and Wetar, Lesser Sunda Islands, has resulted in the discovery of a seventh species in the complex, which we describe as a new species. This species has previously been confused with <i>Caprimulgus macrurus</i>, <i>Caprimulgus celebensis</i> and <i>Caprimulgus manillensis</i> but it differs from these and all other species in the complex by at least 13 vocal characters. Discriminant function analysis correctly classified all recordings in the complex to species. <i>Caprimulgus ritae</i> is known from five adult museum specimens, which are the smallest in the complex and which differ from other species in the complex in several morphological characters. A molecular phylogenetic analysis indicated that <i>C. ritae</i> is sister to <i>C. meesi</i> from Flores and Sumba, and that these species together are sister to <i>C. macrurus</i>. <i>C. ritae</i> is a tropical forest specialist occurring from sea level to at least 1500 m (probably mostly below 1000 m). Lowland and montane forests on Timor are threatened. Wetar is one of the least developed islands in Indonesia, and retains &gt;95% natural vegetation, dominated by <i>Eucalyptus</i> woodlands, with tropical forests in river gorges and slopes in upland areas. Pressure for development is accelerating throughout the range of <i>C. ritae</i>, and a detailed assessment of its conservation status is urgently needed.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13340","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514838","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":"Addressing conflict between fishermen and the Titicaca Grebe (Rollandia microptera) through diet analysis","authors":"D. A. Villar,&nbsp;Ever Yanes,&nbsp;Edwin R. Gutiérrez Tito,&nbsp;Andrew G. Gosler","doi":"10.1111/ibi.13337","DOIUrl":"10.1111/ibi.13337","url":null,"abstract":"<p>Human–wildlife conflict is often a driver of species declines, and understanding the material basis of this conflict is the first step in addressing it. The Titicaca Grebe <i>Rollandia microptera</i> is an endangered endemic species found solely in the Lake Titicaca watershed of Peru and Bolivia, and has experienced population declines due to fisheries bycatch. Human fishers often have negative opinions of the Titicaca Grebe, because they consider it as a competitor for declining fish stocks. We tested that assumption by an analysis of the bird's diet and found that the Titicaca Grebe does not compete with fishers for more lucrative fish species such as trout <i>Oncorhynchus</i> sp. and Pejerrey <i>Odontesthes bonariensis</i>, but does compete for the less desirable (to human fishers) native <i>Orestias</i> sp.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13337","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141338419","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}