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Brain size and urbanization in birds

Chinese Birds 2015年第2期6卷 92-98页

作者： anders pape moller Johannes Erritzoe Laboratoire d’Ecologie Systématique et EvolutionCNRS UMR 8079Universite Paris-Sud Taps Old Rectory

Background: Brain size may affect the probability of invasion of urban habitats if a relatively larger brain entails superior ability to adapt to novel environments. However, once urbanized urban environments may provide poor quality food that has negative consequences for normal brain development resulting in an excess of individuals with small ***: Here we analyze the independent effects of mean, standard deviation and skewness in brain mass for invasion of urban habitats by 108 species of birds using phylogenetic multiple regression analyses weighted by sample ***: There was no significant difference in mean brain mass between urbanized and non-urbanized species or between urban and rural populations of the same species, and mean brain mass was not significantly correlated with time since urbanization. Bird species that became urbanized had a greater standard deviation in brain mass than non-urbanized species, and the standard deviation in brain mass increased with time since urbanization. Brain mass was significantly left skewed in species that remained rural, while there was no significant skew in urbanized species. The degree of left skew was greater in urban than in rural populations of the same species, and successfully urbanized species decreased the degree of left skew with time since urbanization. This is consistent with the hypothesis that sub-optimal brain development was more common in rural habitats resulting in disproportionately many individuals with very smal ***: These findings do not support the hypothesis that large brains promote urbanization, but suggest that skewness has played a role in the initial invasion of urban habitats, and that variance and skew in brain mass have increased as species have become urbanized.

关键词： Birds Brain mass Skewness in Brain Mass Standard deviation in Brain Mass Urbanization

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Long-lived birds suffer less from oxidative stress

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Avian Research 2018年第4期9卷 363-369页

作者： Canwei Xia anders pape moller Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijingChina Ecologie Systématique Evolution UniversitéParis-SudCNRSAgroParisTechUniversitéParis-Saclay91405 Orsay CedexFrance

Background: Oxidative stress, caused by an imbalance between reactive oxygen species and antioxidants, is thought to be an important intrinsic mechanism for aging. Ecologists have tested this hypothesis in birds, although the evidence supporting the link between oxidative stress and lifespan has so far been ambiguous. Two previous studies based on a wide range of different free-living bird species provided contradictory findings: antioxidants were negatively associated with survival rate in one study, but positively associated with longevity in ***: In this study, we identified possible shortcomings in previous research, and then used the comparative methods to test whether long-lived birds experience less oxidative stress reflected by four blood redox state markers(total antioxidant status, uric acid, total glutathione, malondialdehyde) based on data for 78 free-living ***: Relatively long-lived bird species had high levels of antioxidants(total antioxidant status, total glutathione) and low levels of reactive oxygen species(malondialdehyde). These associations were independent of statistical control for any effects of body mass, sampling effort and similarity among taxa due to common phylogenetic ***: The direction of these associations is consistent with the oxidative stress theory of aging.

关键词： Ageing Antioxidant Birds Longevity Oxidative stress Sampling effort

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Avian preference for close proximity to human habitation and its ecological consequences

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Current Zoology 2018年第5期64卷 623-630页

作者： anders pape moller Mario DiAZ Ecologie Systematique Evolution CNRS Universite Paris-Sud AgroParisTech Universite Pari-Saclay 0rsay Cedex F-91400 France Department of Biogeography and Global Change (BGC-MNCN-CSIC) National Museum of Natural Sciences CSIC c/Serrano 155bis Madrid E-28006 Spain

Human proximity often have negative consequences for wildlife. However, animals may also benefit from human proximity in terms of availability of resources and protection against predators and parasites. We recorded the distance between all birds detected during the breeding season along 18 5-kin transects and the nearest inhabited house in three areas of 50 km2 in Spain, France, and Denmark. More than three quarters of birds were located closer than 100 m to the nearest house, while the null expectation was less than a third. Mean distance for species was correlated with degree of bird urbanization and with flight initiation distance. Habitat specialist species with small breeding territories tended to live closer to houses. Birds from species having more broods per year, larger annual fecundity and lower nest predation rate lived closer to human habitation. Breeding range size, population density, and continental breeding population sizes were larger for species living closer to human habitation. Most relationships between distance to houses and bird traits had a strong phylogenetic signal, but most additive trait effects remained after phylogenetic correction. Proximity to human habitation was a main driver of the distribution of birds, with most individuals and species tightly linked to inhabited houses. Living close to human habitation was associated with success in the colonization of urban habitats and with consistent changes in distribution, abundance, behavior, and life history. Replicated measurements of the spatial and tempo- ral variation in these distributions may be useful for monitoring and analyzing the ongoing process of organisms＇ urbanization.

关键词： birds distance to nearest house flight initiation distance humans refuge urbanization.

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Function of the uropygial gland in eiders (Somateria mollissima)

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Avian Research 2019年第3期10卷 330-335页

作者： anders pape moller Karsten Laursen Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering College of Life Sciences Beijing Normal University Beijing 100875China Ecologie Systématique Evolution Université Paris-SudCNRSAgroParisTechUniversité Paris-Saclay91405 Orsay CedexFrance Department of Bioscience Aarhus UniversityGrenavej 14Kalo 8410 RandeDenmark

Background:The uropygial gland is an exocrine gland located above the tail of birds that produces a diverse range of *** has been hypothesized to be involved in chemical protection,water-proofing and maintenance of plumage *** these not necessarily mutually exclusive functions have received some empirical support,there has been little empirical research on the function of ***:Here we analyzed data for 229 individual eiders(Somateria mollissima)collected by Danish hunters during ***:The Eider is a sea-duck that spends almost its entire life in sea water emphasizing water-proofing of the *** size of the uropygial gland increased with body mass in males,but not in females,and it increased with *** size of the uropygial gland decreased during winter. Eiders with small uropygial glands grew their feathers at a fast *** with large wing areas had large uropygial glands. Conclusions:These findings are consistent with large uropygial glands playing a role in water-proofing during molt and foraging, but also that uropygial glands may play a role in chemical defense.

关键词： Anti-microbial substance Eider Somateria mollissima Uropygial gland Water-proofing

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Plumage brightness and uropygial gland secretions in barn swallows

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Current Zoology 2019年第2期65卷 177-182页

作者： anders pape moller Fernando MATEOS-GONZALEZ Ecologie Systematique Evolution Universite Paris-Sud CNRS AgroParisTech Universite Paris-Saclay Batiment 362 F-91405 Orsay Cedex France Department of Ecology and Genetics Evolutionary Biology Centre University of Uppsala Norbyvagen 18d SE-75236 Uppsala Sweden

The uropygial gland has been hypothesized to play a role in sexual signaling through a "make-up" function derived from the effects of secretions from the gland on the appearanee of the plumage and bare parts of the body. Here we show that plumage brightness of dorsal feathers of individual barn swallows Hirundo rustica was greater in mated than in unmated individuals. In addition, plumage brightness in creased with colony size. Furthermore, plumage bright ness was positively correlated with the amount of wax in the uropygial gland, negatively correlated with time of sampling of uropygial wax (perhaps because more wax is present early in the morning after an entire night of wax production without any preening), and negatively correlated with the number of chewing lice that degrade the plumage. Experimentally preventing barn swallows from access to the uropygial gland reduced plumage brightness, showing a causal link between secretions from the uropygial gland and plumage brightness. These findings provide evidence consistent with a role of uropygial secretions in signaling plumage brightness.

关键词： brightness coloration preening wax sexual selection uropygial gland

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Annual spatio-temporal migration patterns of Hooded Cranes wintering in Izumi based on satellite tracking and their implications for conservation

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Avian Research 2018年第3期9卷 264-272页

作者： Chunrong Mi anders pape moller Yumin Guo College of Nature Conservation Beijing Forestry UniversityBeijing 100083China Ecologie Systématique Evolution UniversitéParis-SudCNRSAgroParisTechUniversitéParis-Saclay91405 Orsay CedexFrance

Background: The Hooded Crane(Grus monacha) is listed as a vulnerable species by IUCN. Knowledge about the migration of the Hooded Crane is still limited. Here we reported the spatio-temporal migration patterns of Hooded Cranes wintering in Izumi, Japan, as well as important stopover areas for their ***: Four adult and five subadult cranes, all wintering in Izumi, Japan, were fitted with satellite transmitters(GPS–GSM system) at their stopover sites in northeastern China in 2014 and 2015. We analyzed the time and duration of adults and subadults in spring and autumn migration, as well as the time and duration they stayed in breeding and wintering ground. In addition, we analyzed the land use of the cranes in stopover ***: Adult cranes took much longer time to migrate both north in spring(mean days) compared with subadult cranes(15.3 and 5.2 days, respectively). H= 44.3 days) and south in fall(mean = 54.0 owever, the subadults had longer wintering(mean = 149.8 days) and nomadic(breeding season for adults) seasons(mean d with adults(133.8 and 122.3 days, respectively). Three important stopover areas have been= 196.8 days) compare identified: the region around Muraviovka Park in Russia, the Songnen Plain in China, and the west coast of South Korea, where cranes spent most of their migration time(62.2 and 85.7% in spring and autumn, respectively). During migration, nomadic period and winter, Hooded Cranes usually stay in croplands for resting and feeding. In non-wintering season, less than 6% of stopover sites were located within protected ***: Overall, our results contribute to understanding the annual spatio-temporal migration patterns of Hooded Cranes in the eastern flyway, and planning conservation measures for this species.

关键词： Conservation Eastern migration route Hooded Cranes(Grus monacha) Izumi Satellite tracking Spatiotemporal migration patterns

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Flight initiation distance, color and camouflage

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Current Zoology 2019年第5期65卷 535-540页

作者： anders pape moller Wei LIANG Diogo S.M.SAMiA Laboratoire d'Ecologie Systematique et EvolutionCNRS UMRUniversite Paris-SudBatiment 362Orsay CedexFrance Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing 100875China Ministry of Education Key Laboratory for Ecology of Tropical Islands College of Life SciencesHainan Normal UniversityHaikouChina Department of Ecology Federal University of GoiasGoianiaBrazil

Camouflage is widespread throughout the animal kingdom allowing individuals to avoid detection and hence save time and energy rather than escape from an approaching ***,camouflage is likely to have co-evolved with antipredator ***,we propose that camouflage results in dichotomous escape behavior within and among species with classes of individuals and species with cryptic coloration having shorter flight initiation distances(FIDs;the distance at which an individual takes flight when approached by a human).We report the results of 2 tests of this ***,bird species with cryptically colored plumage have consistently shorter FID than closely related species without such *** species with sexually dimorphic plumage,brightly colored adult male common pheasants Phasianus colchicus and golden pheasants Chrysolophus pictus have long and variable FID,whereas cryptically colored juveniles and adult females have short and invariable ***,FID in females was predicted by presence or absence of cryptic color,FID in males and their *** findings are consistent with the hypothesis that risk-taking behavior has been attuned to camouflage,and that species with different levels of camouflage differ consistently in their FID.

关键词： anti-predator behavior birds camouflage crypsis sexual dichromatism

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Russet Sparrows spot alien chicks from their nests

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Avian Research 2018年第2期9卷 150-156页

作者： Juan Huo Canchao Yang Tongping Su Wei Liang anders pape moller Ministry of Education Key Laboratory for Ecology of Tropical Islands College of Life Sciences Hainan Normal University Haikou 571158 China College of Forestry Guangxi University Nanning 530004 China Ecologie Systematique Evolution Universite Paris-Sud CNRS Agro Paris Tech Universite Paris Saclay 91405 Orsay Cedex France

Background： In coevolutionary interactions between brood parasites and their hosts, host parents are under strong selection to evolve defenses against parasitism. Egg rejection is an efficient and common defense against parasitism, although some apparently suitable hosts do not reject cuckoo ***： Sparrows Ploceidae are widespread throughout the Old World, and they have a suitable diet for rearing cuckoos, but still they are rarely exploited by brood parasites. To solve such puzzle, we conducted artificial parasitism and cross-fostering experiments in Russet Sparrow （Posset cinnomomeus）.Results： The present study showed that Russet Sparrows have no egg recognition ability, but recognize their own nestlings and eject alien chicks or starve them to death. They may use visual cues in chick recognition, although they accept sister species Tree Sparrow （Posset montonus）.Conclusions： By rejecting nestlings of foreign species, Russet Sparrows have succeeded to escape from the brood parasitism by cuckoos and other parasites. Our studies shed light on the puzzle why some species are not utilized by cuckoo parasites as hosts,

关键词： Chick recognition Coevolution Cross-fostering Egg recognition Posset cinnamomeus

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Spatial variation in egg polymorphism among cuckoo hosts across 4 continents

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Current Zoology 2020年第5期66卷 477-483页

作者： Canchao Yang Xingfeng Si Wei Liang anders pape moller Ministry of Education Key Laboratory for Tropical Plant and Animal Ecology College of Life SciencesHainan Normal UniversityHaikou 571158China Zhejiang Tiantong Forest Ecosystem National Observation and Research Station School of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China Institute of Eco-Chongming(IEC) Shanghai 202162China Ecologie Systematique Evolution Universite Paris-SudCNRSAgroParisTechUniversite Paris-SaclayF-91405 Orsay CedexFrance

Although egg color polymorphism has evolved as an effective defensive adaptation to brood parasitism,spatial variations in egg color polymorphism remain poorly ***,we investigated egg polymorphism in 647 host species(68 families and 231 gen era)parasitized by 41 species of Old Word cuckoos(1 family and 11 gen era)across Asia,Europe,Africa,and *** diversity of parasitic cuckoos differs among continents,reflecting the continent-specific intensities of parasitic selection pressure on ***,host egg polymorphism is expected to evolve more frequently on continents with higher cuckoo *** identified egg polymorphism in 24.1%of all host species and 47.6%of all host *** common cuckoo Cuculus canorus utilized 184 hosts(28.4%of all host species).Hosts of the common cuckoo and of Chrysococcyx species were more likely to have polymorphic eggs than hosts parasitized by other *** the number of host species and the host families targeted by the cuckoo species were positively correlated with the frequency of host egg *** host species and most hosts exhibiting egg color polymorphism were located in Asia and *** egg polymorphism was observed less frequently in Australia and *** results also suggested that egg polymorphism tends to occur more frequently in hosts that are utilized by several cuckoo species or by generalist cuckoo *** suggest that selecti on pressure on hosts from a given contin ent in creases proportionally to the number of cuckoo species,and that this selection pressure may,in turn,favor the evolution of host egg polymorphism.

关键词： avian brood parasitism cuckoo diversity cuckoo host

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Comparison of head size and bite force in two sister species of parrotbills

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Avian Research 2018年第1期9卷 27-32页

作者： Xiaodong Rao Canchao Yang Laikun Ma Jianwei Zhang Wei Liang anders pape moller Ministry of Education Key Laboratory for Ecology of Tropical Islands College of Life Sciences Hainan Normal University Haikou 571158 China Ecologie Systematique Evolution Universite Paris-Sud CNRS AgroParisTech Universite Paris-Saclay 91405 Orsay Cedex France

Background: Brain size is associated with morphological evolution and behavioral flexibility because animals with large brain size tend to utilize new resources and colonize novel environments more ***, animals with larger brain size should possess larger distribution *** size is strongly positively correlated with head size in birds, but also with prey size and vocalizations, because individuals with large heads eat large food items and produce high frequency ***: To test if there exists an association between head morphology and bite performance, we compared head size and bite force in two sympatric sister species of parrotbills, Ashy-throated Parrotbill(Paradoxornis alphonsianus) and Vinous-throated Parrotbill(***), which both originated from the Himalayan area, but differ significantly in their distribution ***: In Guizhou, southwestern China, the Ashy-throated Parrotbill with a restricted distribution range had smaller heads whilst the Vinous-throated Parrotbill with a large distribution range had larger ***, there were no differences in head size between Ashy-throated Parrotbills and allopatric populations of Vinous-throated Parrotbills(Jiangxi and Hebei).Furthermore, the tendency of variation in bite force was opposite to that in head size with populations with larger head size having weaker bite ***: We showed that there are no differences in head size between the Ashy-throated Parrotbill and allopatric populations of Vinous-throated Parrotbill, which provides evidence for the hypothesis that differences in head size in the Guizhou populations of two sister species are probably the result of local adaptation rather than *** study has implications for avian dispersal and adaption related to head size such as diet ecology and vocalizations.

关键词： Behavioral flexibility Distribution range Paradoxornis alphonsianus Paradoxornis webbianus Sister species

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