Ardeola-International Journal of Ornithology最新文献

{"title":"An Extension to the Known Wintering Range of the Steppe Eagle Aquila nipalensis, in the Poonch and Jhelum Valleys, Azad Jammu and Kashmir, Pakistan","authors":"F. Bari, E. Rehman, M. Kabir, Shakeel Ahmad","doi":"10.13157/arla.67.2.2020.sc1","DOIUrl":"https://doi.org/10.13157/arla.67.2.2020.sc1","url":null,"abstract":"Summary. The endangered Steppe Eagle Aquila nipalensis is a winter migrant to Pakistan but baseline data regarding its current distribution and population status there is sparse. The present study investigated new distributional records from the Poonch and Jhelum valleys of Azad Jammu and Kashmir, beyond the range of the current IUCN distribution map for Pakistan. It adds another 6,730km2 to the known wintering range. Mixed wintering groups of adults and immatures, averaging 154 individuals annually, were counted in two survey years. Site counts averaged ten birds and ranged from 63 at Hajira, a waste dump, to just two, at Kalas. waste from slaughterhouses and other anthropogenic sources appeared to be the main food source since the largest eagle concentrations were at dump sites. we suggest that the addition of the study area to the wintering range map of the species and recommend annual monitoring of the population. —Bari, F., Rehman, E.U., Kabir, M. & Ahmad, S. (2020). An extension to the known wintering range of the Steppe Eagle Aquila nipalensis, in the Poonch and Jhelum Valleys, Azad Jammu and Kashmir, Pakistan. Ardeola, 67: XX-XX.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86000034","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}

{"title":"How Habitat Features and Human Activities Shape Occurrence of the Declining Eurasian Oystercatcher Haematopus ostralegus on a Mediterranean Coastline","authors":"F. Hamza","doi":"10.13157/arla.67.2.2020.ra3","DOIUrl":"https://doi.org/10.13157/arla.67.2.2020.ra3","url":null,"abstract":"Summary. Understanding ecological factors and processes affecting the abundance of species of conservation concern is key to ensuring their conservation. The Eurasian Oystercatcher Haematopus ostralegus is a ‘Near Threatened’ wader species that depends on coastal zones during the non-breeding season. However, these habitats constitute focal points of human settlement and suffer from intensified human activities. I used survey data from the central part of the Gulf of Gabès, Tunisia, to assess the significance of ecological and anthropogenic factors as predictors of the density of wintering oystercatchers. Using generalized linear mixed models, Oystercatcher density was positively correlated with sediment mud content and negatively correlated with seagrass cover. Density was also positively correlated with distance from human settlements and negatively correlated with the densities of recreationists and artisanal fishermen. Overall, oystercatchers avoid intertidal areas near human settlements. This study provides critical information on where conservation and research efforts should be focused to preserve this wader species. As a priority, investigations on flight initiation distances are needed to determine at which spatial level it would be beneficial to create buffer zones or walkways to minimise the negative impact of human disturbance on this wintering population.— Hamza, F. (2020). How habitat features and human activities shape occurrence of the declining Eurasian Oystercatcher Haematopus ostralegus on a Mediterranean coastline. Ardeola, 67: 269-284.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76450230","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}

{"title":"Analysis of Spatio-Temporal Patterns of Red Kite Milvus milvus Electrocution","authors":"Gabriela Crespo-Luengo, R. Hernández‐Lambraño, Iván Barbero-Bermejo, J. A. Sánchez-Agudo","doi":"10.13157/arla.67.2.2020.ra2","DOIUrl":"https://doi.org/10.13157/arla.67.2.2020.ra2","url":null,"abstract":"Summary. The Spanish Castilla y León region is one of the most important wintering areas in Europe for the Red Kite Milvus milvus. At the same time, the steepest population declines of Red Kite have been recorded there, electrocution by power lines being one of the main causes. Thus, knowledge about the annual spatio-temporal ecology of this raptor, and its relationship to electrocution events, is necessary to develop effective conservation measures. Distribution models for the breeding and wintering populations of the Red Kite in Castilla y León were developed, considering climate, topography and land uses, to analyse the potential spatial variation between them. Models for electrocution risk also considered the technical characteristics of the power poles to determine their impact on electrocution events in both seasons. Our results show two different areas are used seasonally: 1) an important wintering area in the centre of the region, characterised by crop zones, moderate temperatures, rubbish dump sites and human presence, and 2) a nesting area in the south of the region, in which the availability of livestock carcasses, low levels of precipitation, distance from landfills and gentle relief were the most influential variables. The electrocution risk model indicates that the most suitable areas for Red Kite reproduction are also those that are most risky, including power poles of the most dangerous types; those with straight or vaulted cross-arms. Finally, the theoretical approach presented here provides a framework for the design of management and control measures aimed at minimising Red Kite electrocutions in the northern half of the Iberian Peninsula. —Crespo-Luengo, G., Hernández-Lambraño, R.E., Barbero-Bermejo, I. & Sánchez-Agudo, J.A. (2020). Analysis of spatio-temporal patterns of Red Kite Milvus milvus electrocution. Ardeola, 67: 247-268.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74086582","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}

{"title":"Effects of Forest Fragmentation on Feather Corticosterone Levels in an Amazonian Avian Community","authors":"Thiago Bicudo, M. Anciães, L. Arregui, D. Gil","doi":"10.13157/arla.67.2.2020.ra1","DOIUrl":"https://doi.org/10.13157/arla.67.2.2020.ra1","url":null,"abstract":"Summary. In the Amazon, the construction of hydroelectric dams is an emergent driver of biodiversity loss, creating numerous land-bridge islands, most of them unable to sustain an assemblage of bird species comparable to the intact forest. Although we understand the effects of forest fragmentation on species richness and distribution, we still need to uncover the physiological mechanisms underlying the success of organisms living in disturbed habitats. In this study, we used feather corticosterone levels as a measurement of physiological indicators of stress, evaluating whether corticosterone levels mirror the effects of habitat fragmentation on species occurrence. Since data suggest that smaller islands can reduce habitat suitability, increasing stress in birds that live within them, we predicted that birds living in smaller islands would present increased feather corticosterone levels. We captured birds in 13 islands of varying size and in two continuous forests and analysed feather corticosterone levels of 265 individuals from eight different species. Overall, our findings did not support the hypothesis that corticosterone varies in relation to island size, except for the Guianan Antwarbler Hypocnemis cantator, which presented the predicted pattern: decreasing feather corticosterone levels with increasing island size. These differences suggest that species respond differently to stressors driven by fragmentation. Further studies are necessary to assess the reliability of corticosterone levels as a physiological measurement of stress and to determine which parameters are useful to understand how insularisation caused by human activities may influence the resistance of avian populations to habitat disturbances. —Bicudo, T., Anciães, M., Arregui, L. & Gil, D. (2020). Effects of forest fragmentation on feather corticosterone levels in an Amazonian avian community. Ardeola, 67: 229-245.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86061230","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}

{"title":"Effects of Food Availability and Parental Risk Taking on Nestling Period Duration: A Field ExperimenT on the Pied Flycatcher Ficedula hypoleuca","authors":"J. Moreno","doi":"10.13157/arla.67.1.2020.ra3","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.ra3","url":null,"abstract":"Summary. The timing of fledging is critical in altricial birds as it affects offspring survival probability and thereby both parental and offspring fitness. The high vulnerability of offspring to predation soon after fledging may induce a parent-offspring conflict with respect to the age of fledging, as parents would benefit more than offspring from reducing the period of whole-brood vulnerability before fledging. Parents also benefit from inducing early fledging through reduced commuting costs and a decreased exposure to predators. A reliable food resource near the nest could thus favour a relaxation of parental drives to induce fledging and enable an approach to the optimal fledging age from the offspring point of view. A population of a cavity nester, the European Pied Flycatcher Ficedula hypoleuca, was offered food supplements (live mealworms) at the nest-box to randomly selected pairs throughout the nestling period and fledging ages were compared with those at nests without supplements. Provisioning parents were also trapped at the nest-box to estimate their willingness to incur predation risks in terms of easiness of capture (trappability). Fledging ages ranged from 15 to 20 days. Fledging was delayed in food-supplemented nests (n = 21) compared with control nests (n = 20) by one day on average, a significant difference. This was not due to the size and mass of nestlings at 13 days, which were similar under both treatments. Moreover, fledging age was positively related to parental trappability. Parents with easy access to food near the nest and those more willing to risk predation were those whose nestlings fledged at older ages. Parents apparently adjust the timing of offspring fledging to their foraging costs.—Moreno, J. (2020). Effects of food availability and parental risk taking on nestling period duration: a field experiment on the Pied Flycatcher Ficedula hypoleuca. Ardeola, 67: 29-38.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88858423","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}

{"title":"Noticiario Ornitológico","authors":"B. Molina, J. Prieta, J. Lorenzo","doi":"10.13157/arla.64.2.2017.on","DOIUrl":"https://doi.org/10.13157/arla.64.2.2017.on","url":null,"abstract":"Este informe recopila información de 197 especies que se reparten por toda la geografía nacional siguiendo la secuencia taxonómica y los nombres según la Lista de las Aves de España (Gutiérrez et al., 2012) y teniendo en cuenta las especies consideradas actualmente como rarezas (Rouco et al., 2016). Se recuerda la importancia del envío de las citas de aquellas especies que han salido recientemente de la lista de aves consideradas como raras con el objetivo de poder conocer cómo evoluciona su estatus, si las observaciones aumentan o su presencia vuelve a ser puntual o excepcional. Por otro lado, para registrar y consultar los datos del Noticiario Ornitológico, así como de aves exóticas o de aves raras se ha preparado una aplicación, con la opción de ser utilizada a través de la telefonía móvil: www.gruposdetrabajoseo.org","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90548455","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}

{"title":"Sex-Specific Contributions to Reproduction in Whiskered Tern Chlidonias hybrida Colonies of Varying Breeding Density","authors":"R. Chambon, Franck Latraube, V. Bretagnolle, J. Paillisson","doi":"10.13157/arla.67.1.2020.sc6","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.sc6","url":null,"abstract":"Addressing the question of the parental effort allocation when breeding remains central to life-history theory. This is particularly the case for monogamous species with obligate bi-parental care, where each parent should evaluate its contribution throughout the breeding season taking into account both the effort of its mate and environmental constraints. In colonial species, social environments may influence the activities of breeders. Here we compared patterns of mate effort in the Whiskered Tern Chlidonias hybrida, throughout breeding in two regions that differed greatly in colony nest density. This species builds large floating nesting platforms on aquatic plant beds. Accordingly, we explored whether nest building was sex-specific and influenced the activities of breeders throughout the season. In both regions, parental effort was indeed differentiated by sex; males invested strongly in nest-material delivery and mate provisioning during the nest-building stage, and females displayed increased investment during chick rearing. Contrary to expectations, courtship feeding and social interactions were less frequent in the region with high nest density. Our findings demonstrate that each parent clearly adjusted its reproductive effort throughout the season, whereas the contrast in social conditions between the two study regions weakly affected the activities of breeders.—Chambon, R., Latraube, F., Bretagnolle, V. & Paillisson, J.-M. (2019). Sex-specific contributions to reproduction in Whiskered Tern Chlidonias hybrida colonies of varying breeding density. Ardeola, 67: 113-125.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81376135","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}

{"title":"Cheating Cheaters: Social Monogamy but Genetic Polygamy in a Brood Parasite","authors":"Diana Bolopo, Gianluca Roncalli, D. Canestrari, V. Baglione","doi":"10.13157/arla.67.1.2020.ra4","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.ra4","url":null,"abstract":"Understanding the variability of mating systems is central in the study of animal behaviour. The advent of genetic techniques allowed combining social and genetic data, providing a more comprehensive view of reproductive strategies. In obligate avian brood parasites, the lack of constraints derived from offspring care allows for great plasticity of the mating system in response to changes in socio-ecological conditions. This potential for intraspecific variation makes brood parasites ideal model species to investigate the evolution of reproductive behaviour. We simultaneously studied for the first time social and genetic patterns of reproduction of the Great Spotted Cuckoo Clamator glandarius, combining radio-tracking and behavioural observations in the field with genetic parentage analyses. Our results reveal that loose pair bonds can be maintained in this species despite high levels of genetic polygamy and lack of territoriality, possibly because of the need of intra-pair cooperation for finding and parasitising the nests of its large hosts: the Carrion Crow Corvus corone and the Eurasian Magpie Pica pica. We also found that cuckoos mostly ranged around suitable foraging grounds, but females moved larger distances to find host nests to parasitise. Comparison of our results with previous reports on different populations also suggests a plasticity of Great Spotted Cuckoo territorial behaviour that may depend on population density, host choice and distribution of host nests.—Bolopo, D., Roncalli, G., Canestrari, D. & Baglione, V. (2020). Cheating cheaters: social monogamy but genetic polygamy in a brood parasite. Ardeola, 67: 39-56.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76043893","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}

{"title":"Material Type and Position Determines the Insulative Properties of Simulated Nest Walls","authors":"D. Deeming, J. Griffiths, L. Biddle","doi":"10.13157/arla.67.1.2020.sc7","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.sc7","url":null,"abstract":"Incubation in birds takes place within a nest that is often assumed to confer a degree of thermal insulation. The range, amounts and organisation of materials used to construct nest walls hampers our understanding of the degree to which they provide insulation during incubation. This experimental study used temperature loggers in a model system to test the insulative properties of materials extracted from bird nests to determine: 1) whether differences existed in terms of insulation, and 2) if the position of a material mattered when two materials were tested in combination. Animal-derived materials offered better insulation than plant-derived materials, whether tested singly or in combination. Halving the mass of each material did not affect insulation conferred by the material proximal to the temperature logger. Differing thermal conductivities of the materials in contact with the temperature logger may explain these results. If a bird strategically places an animal-derived material only into a nest cup lining then it may be sufficient to provide good insulation for the whole nest. More research is needed to generate thermal conductivity data for commonly used nest materials to test this idea more rigorously in finite element heat transfer models.—Deeming, D.C., Griffiths, J.D. & Biddle, L.E. (2020). Material type and position determines the insulative properties of simulated nest walls. Ardeola, 67: 127-136.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2020-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83346966","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}

{"title":"Departure Decisions of a Migratory Passerine, the Common Reed-Warbler Acrocephalus scirpaceus, in Relation to Fuel Load and Geographical Barrier Proximity","authors":"Miren Andueza, E. Barba, D. Cuenca, M. Laso, Edorta Unamuno, Azaitz Unanue, T. Valkenburg, M. Genovart, J. Arizaga","doi":"10.13157/arla.67.1.2020.ra2","DOIUrl":"https://doi.org/10.13157/arla.67.1.2020.ra2","url":null,"abstract":"Research on the stopover ecology of migrant birds has examined the role of multiple factors, both intrinsic and extrinsic, on departure decisions. However, a single factor may influence stopover decisions differentially, depending on the relative geographic location of a stopover site within the flyway and the expectation of ecological challenges ahead. For instance, actual fuel load may have a decisive influence on departure decisions before a crossing of major geographical barriers, such as seas or deserts, but may be less important when crossing vast continental areas offering plenty of opportunities to refuel. The aim here was to test whether the relative influence of fuel load on departure decisions of the Common Reed-warbler Acrocephalus scirpaceus, a long-distance migrant songbird, varies in relation to proximity to a geographical barrier: the sea expanse between Iberia and Africa. We expected that departure from southern Iberian stopover sites would be highly influenced by fuel load, since migrants would not fly to Africa until they had sufficient fuel to cross the sea. We used Cormack-Jolly-Seber (CJS) models to test for the effect of fuel load on emigration (departure) probability from a number of stopover sites situated in northern and southern Iberia during the autumn migration period. Reed-warblers stopping over for longer than one day were more likely to depart if they were in northern Iberia than in southern sites. Moreover, large fuel loads promoted emigration from stopover sites in northern, but not in southern, Iberia. Therefore, we found no evidence supporting the hypothesis that Reed-warblers wait until they acquire large fuel loads before leaving their stopover sites near the edge of the barrier. This study shows that the same parameters may not act in the same way along migration route, in particular in relation to geographical barrier proximity.—Andueza, M., Barba, E., Cuenca, D., Laso, M., Unamuno, E., Unanue, A.,Valkenburg, T., Genovart, M. & Arizaga, J. (2020). Departure decisions of a migratory passerine, the Common Reed-warbler Acrocephalus scirpaceus, in relation to fuel load and geographical barrier proximity.","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87680719","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}