Emu-Austral Ornithology最新文献_第8页

Genomic insights into the taxonomy and migration of the Forest Kingfisher Todiramphus macleayii 森林翠鸟Todiramphus macleayii的分类和迁徙的基因组学见解

IF 1.3 4区生物学

Emu-Austral Ornithology Pub Date : 2022-09-14 DOI: 10.1080/01584197.2022.2122508

H. Johnston, Jéssica Fenker, Anna M. Kearns, A. Drew, I. Mason, C. Moritz, L. Joseph

引用次数: 1

Dominant factors shaping the gut microbiota of wild birds 塑造野生鸟类肠道菌群的主导因素

IF 1.3 4区生物学

Emu-Austral Ornithology Pub Date : 2022-08-29 DOI: 10.1080/01584197.2022.2114088

Mohamed Iyaaz A. Matheen, M. Gillings, R. Dudaniec

{"title":"Dominant factors shaping the gut microbiota of wild birds","authors":"Mohamed Iyaaz A. Matheen, M. Gillings, R. Dudaniec","doi":"10.1080/01584197.2022.2114088","DOIUrl":"https://doi.org/10.1080/01584197.2022.2114088","url":null,"abstract":"ABSTRACT The role of the gut microbiota in regulating host physiology and health is well established, with effects on host development, behaviour, nutrition, immunity, and reproductive strategy. While mammalian and insect microbiomes have attracted considerable research attention, avian microbiome research is deservedly growing, given the key roles that birds play in ecosystem services and functioning. Here we review recent literature (2008–2021) on the gut microbiome of wild birds, focusing on the role of key drivers that shape gut bacterial communities: diet, environment, and the phylogeny of host species. While most studies on avian gut microbiomes are confined to domestic poultry research, studies of wild birds have been increasing, particularly for the orders Passeriformes, Charadriformes, and Anseriformes. Four bacterial phyla dominate the gut microbiota of wild birds: Proteobacteria, Actinobacteria, Firmicutes, and Bacteroidetes with varying abundances and compositions across taxa. Diet was reported to be the most influential factor shaping avian gut microbiomes, followed by phylogeny, habitat, the nest environment and seasonal variation. However, the current scarcity and large variation in reported patterns limits a clear understanding about how the ecology and evolution of birds are affected by the gut microbiome. Increased research effort is needed that links microbial diversity to function and avian health, with an expansion of sampling across host phylogenetic lineages, environmental conditions, dietary niches, and life stages. A shift towards field-based experimental approaches will further contribute towards more conclusive findings, which will serve to advance threatened species management in both captivity and in the wild.","PeriodicalId":50532,"journal":{"name":"Emu-Austral Ornithology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83924030","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: 6

Comparative nest attendance and chick provisioning strategies in coastal and desert nesting Grey Gulls (Leucophaeus modestus) in northern Chile 智利北部沿海和沙漠筑巢灰鸥(Leucophaeus modestus)的巢率和雏鸟供应策略比较

IF 1.3 4区生物学

Emu-Austral Ornithology Pub Date : 2022-08-29 DOI: 10.1080/01584197.2022.2112400

Alejandro Simeone, Carlos B. Zavalaga, Roberto Aguilar-Pulido, P. Arce

{"title":"Comparative nest attendance and chick provisioning strategies in coastal and desert nesting Grey Gulls (Leucophaeus modestus) in northern Chile","authors":"Alejandro Simeone, Carlos B. Zavalaga, Roberto Aguilar-Pulido, P. Arce","doi":"10.1080/01584197.2022.2112400","DOIUrl":"https://doi.org/10.1080/01584197.2022.2112400","url":null,"abstract":"ABSTRACT Grey Gulls (Leucophaeus modestus) are unique among gulls in that they forage in the coast but breed up to 115 km inland in the barren Atacama Desert of northern Chile. By nesting in the desert, adults are limited to a single daily foraging trip to feed their chicks and relieve their incubating/brooding mates. Birds perform long-distance and energetically expensive trips between foraging and breeding grounds. We describe how Grey Gulls modify nest attendance and chick provisioning strategies from an unusual coastal colony established at Playa Brava, northern Chile, during the 2017–2018 season. Contrary to what it is usually observed in desert colonies, incubating, and brooding Grey Gulls at Playa Brava relieved mates at the nest regularly and fed chicks several times throughout the day. Some adults even left their chicks unattended at the nest to forage on the nearby shoreline (<0.15 km) for a variable amount of time (up to 57 min) before returning to resume brooding. These behaviours are likely to ease parental duties by allowing multiple pair changeovers, reduce energy expenditure by avoiding extensive trips between the desert and the coast, increase chick growth rates by allowing multiple meals during the day, among other advantages. Our observations show that, when moving their colonies from the desert to the coast, Grey Gulls accordingly adjust their breeding behaviour to cope with this new habitat.","PeriodicalId":50532,"journal":{"name":"Emu-Austral Ornithology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84024771","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

Seed preferences suggest a high vulnerability of the Yellow Cardinal (Gubernatrix cristata) to habitat degradation in Argentina 在阿根廷，种子偏好表明黄色红衣主教(Gubernatrix cristata)极易受到生境退化的影响

IF 1.3 4区生物学

Emu-Austral Ornithology Pub Date : 2022-08-28 DOI: 10.1080/01584197.2022.2112696

L. Marone, S. Camín

{"title":"Seed preferences suggest a high vulnerability of the Yellow Cardinal (Gubernatrix cristata) to habitat degradation in Argentina","authors":"L. Marone, S. Camín","doi":"10.1080/01584197.2022.2112696","DOIUrl":"https://doi.org/10.1080/01584197.2022.2112696","url":null,"abstract":"ABSTRACT The Yellow Cardinal is a globally endangered species endemic of southern South America. Knowledge of its general biology has increased in recent years, but its feeding ecology is less well-known. Assessing the feeding ecology of endangered species imposes ethical dilemmas, and we therefore took advantage of Yellow Cardinals rescued by rangers from illegal trafficking in the Monte desert, Mendoza, Argentina, to experimentally assess their seed preferences by using two different seed sets to test the hypotheses that (1) the birds prefer medium-sized and large seeds of native grass species, which are the seeds that are most reduced by cattle grazing, and (2) birds are not able to handle and consume the large seeds typical of non-native crop species. Choice and non-choice experiments were combined to assess the seed preferences. In the experiments with eight native seeds <1 mg (4 grasses, 4 forbs) the birds preferred the medium-sized and large grass seeds over the forb seeds. In the experiment with eight grass seeds (4 native, 4 commercial; 0.23–33 mg) birds had difficulty in handling the heaviest seeds, with a threshold between 7 and 25 mg. This difficulty might explain the positive association of the Yellow Cardinal with wild savannahs and xerophytic shrubland but not with agricultural fields, since common crops have large seeds (40–350 mg). Given the species affinity for habitats that are often used for livestock ranching, overgrazing should be included as a source of habitat degradation due to the reduction in key food resources.","PeriodicalId":50532,"journal":{"name":"Emu-Austral Ornithology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90462386","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

Health status indices of Kelp Gull populations in South Africa 南非海带鸥种群健康状况指数

IF 1.3 4区生物学

Emu-Austral Ornithology Pub Date : 2022-08-28 DOI: 10.1080/01584197.2022.2114089

Katharina Reusch, P. Ryan, L. Pichegru

引用次数: 0

Birds on farms: a review of factors influencing bird occurrence in the temperate woodlands of south-eastern Australia 农场上的鸟类:澳大利亚东南部温带林地鸟类发生的影响因素综述

IF 1.3 4区生物学

Emu-Austral Ornithology Pub Date : 2022-08-03 DOI: 10.1080/01584197.2022.2106875

D. Lindenmayer

{"title":"Birds on farms: a review of factors influencing bird occurrence in the temperate woodlands of south-eastern Australia","authors":"D. Lindenmayer","doi":"10.1080/01584197.2022.2106875","DOIUrl":"https://doi.org/10.1080/01584197.2022.2106875","url":null,"abstract":"ABSTRACT Australia’s temperate woodlands are among the most heavily modified biomes globally. I summarise some of the work on birds in south-eastern Australia that identifies drivers of bird biodiversity loss and the effectiveness of management interventions. I particularly focus on studies by the Sustainable Farms project at The Australian National University which show that: (1) Bird occurrence is associated with the amount of woody vegetation cover at site, farm and landscape scales. (2) Planting to increase woodland cover has greater relative positive effects on birds than grazing control. However, grazing of plantings has inherently negative impacts. (3) There are different broad structural types of woodland (old growth, regrowth and replantings) and each supports different bird assemblages. (4) The highest bird biodiversity occurs on farms which support all three woodland structural types, as well as other natural assets like paddock trees and fallen timber. (5) Long-term data show that while some woodland species are increasing, twice as many species are declining. Despite the body of information on woodland birds, substantial knowledge gaps remain. These include understanding of: (1) the role of fire in woodland bird dynamics and habitat suitability, and (2) demographic processes like bird breeding success and how it affects long-term site occupancy. Bird biodiversity in Australian agricultural landscapes formerly dominated by temperate woodlands will be best supported by: (1) ceasing land clearing, (2) greater woodland regeneration and woodland planting, (3) limiting livestock grazing, and (4) limiting the impacts of the Noisy Miner (Manorina melanocephala).","PeriodicalId":50532,"journal":{"name":"Emu-Austral Ornithology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73154204","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

Insular nestling growth and its relationship to parental care effort in Silvereyes, Zosterops lateralis 银眼斑鳖岛巢生长及其与亲代抚育努力的关系

IF 1.3 4区生物学

Emu-Austral Ornithology Pub Date : 2022-07-31 DOI: 10.1080/01584197.2022.2105723

Erik M. Sandvig, T. Coulson, B. Robertson, W. E. Feeney, S. Clegg

{"title":"Insular nestling growth and its relationship to parental care effort in Silvereyes, Zosterops lateralis","authors":"Erik M. Sandvig, T. Coulson, B. Robertson, W. E. Feeney, S. Clegg","doi":"10.1080/01584197.2022.2105723","DOIUrl":"https://doi.org/10.1080/01584197.2022.2105723","url":null,"abstract":"ABSTRACT The rate at which avian offspring grow can have consequences for survival and reproductive output as an adult and is known to vary widely among and within species. This variation is thought to be an adaptive response to cope with environmental variation. The principal environmental factors affecting growth are food availability and predation risk, predominantly acting as constraints on parental care. Islands pose an interesting system to explore growth rate dynamics, because the characteristic insular features of high population densities and depauperate predator diversity translate into a potentially food limited environment with low predation risk. Insular environments typically produce populations with slower life history strategies and larger body size in small-bodied species, features that are likely to be mediated by growth rate. We describe the nestling growth of an insular population of Silvereyes and how it relates to parental size and parental care. Neither parental size nor parental care explained insular nestling growth rate, even though food acquisition is thought to underpin avian growth rates. This could be due to a mismatch between acquisition and allocation of resources by nestlings. Compared to a small number of mainland nestlings, the island growth curve asymptotes were significantly larger and inflection points much later, but insular growth rates were only marginally slower. This is in line with proposed insular adaptations required to produce larger body size on islands, however understanding the mechanism underlying this pattern will require data on the relationship between food quality and acquisition, and physiological allocation of resources within individuals.","PeriodicalId":50532,"journal":{"name":"Emu-Austral Ornithology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88941329","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

Revealing migration schedule and potential breeding grounds of Lined Seedeaters using citizen science data 利用公民科学数据揭示线播虫的迁徙时间表和潜在繁殖地

IF 1.3 4区生物学

Emu-Austral Ornithology Pub Date : 2022-07-28 DOI: 10.1080/01584197.2022.2105235

Filipe C. R. Cunha, L. Lopes, A. Selezneva

{"title":"Revealing migration schedule and potential breeding grounds of Lined Seedeaters using citizen science data","authors":"Filipe C. R. Cunha, L. Lopes, A. Selezneva","doi":"10.1080/01584197.2022.2105235","DOIUrl":"https://doi.org/10.1080/01584197.2022.2105235","url":null,"abstract":"ABSTRACT The Lined Seedeater (Sporophila lineola) is a small intra-tropical migrant songbird. However, little is known about its breeding and wintering grounds, or migratory habits. To investigate potentially distinct breeding populations and the migratory schedule of Lined Seedeaters we analysed its spatial and temporal distribution using published breeding records, museum vouchers, and data from citizen science projects (eBird and WikiAves). Our findings suggest that there are three main breeding areas: northern Argentina and north-western Paraguay, south-eastern Brazil, and north-eastern Brazil, and that the breeding season seems to be restricted to November through May, with slight differences in timing among these three areas. The species winters in the northern part of South America (mostly in grassland areas) and maybe also in the Amazonia. Moreover, rainfall predicts the latitudinal and longitudinal movements of Lined Seedeaters, with the migratory movements associated with an increase in rainfall. Taken together, these results provide a first comprehensive overview on the migration of Lined Seedeater, calling for further empirical field studies. Understanding intra-tropical migratory patterns is paramount to comprehend the potential impacts of environmental change in tropical ecosystems.","PeriodicalId":50532,"journal":{"name":"Emu-Austral Ornithology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81078261","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

Life history characteristics and alarm calling in Australian arid-zone birds 澳大利亚干旱地区鸟类的生活史特征和警报呼叫

IF 1.3 4区生物学

Emu-Austral Ornithology Pub Date : 2022-07-28 DOI: 10.1080/01584197.2022.2104735

Nicole E. Butler, S. Watson, R. Peters

引用次数: 0

Sympatric finches differ in visitation patterns to watering holes: implications for site-focused bird counts 同域雀鸟对水坑的访问模式不同:对以地点为中心的鸟类计数的影响

IF 1.3 4区生物学

Emu-Austral Ornithology Pub Date : 2022-07-28 DOI: 10.1080/01584197.2022.2104734

Sydney J. Collett, Tara L. Crewe, I. Radford, S. Garnett, H. Campbell

{"title":"Sympatric finches differ in visitation patterns to watering holes: implications for site-focused bird counts","authors":"Sydney J. Collett, Tara L. Crewe, I. Radford, S. Garnett, H. Campbell","doi":"10.1080/01584197.2022.2104734","DOIUrl":"https://doi.org/10.1080/01584197.2022.2104734","url":null,"abstract":"ABSTRACT Estimating trends in population size is critical for understanding population status and assessing the success of management interventions. Visual counts of birds as they congregate around predictable locations, such as waterholes, is a popular technique for estimating population size. Bird counts are used as a proxy for abundance, but how the relationship between counts and actual abundance varies over space and time is rarely assessed. Here, we demonstrate that colour banding and motion detection cameras provided a good method for monitoring finch visitation patterns across space and time. These methods were validated using three sympatric finch species, the abundance of which have been estimated from waterhole counts over many years. The study showed significant temporal inter-species variability in the proportion of birds visiting waterholes and the number of times the same individual returned to the same waterhole during the early morning. Bird visitation rates also varied between consecutive days, across adjacent waterholes and at different stages of the dry season. Our study suggests that spatiotemporal variation in individual behaviour may introduce substantial error into site-focused bird counts and we recommend considering this in census design.","PeriodicalId":50532,"journal":{"name":"Emu-Austral Ornithology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81921548","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