Large-Scale Age-Dependent Skewed Sex Ratio in a Sexually Dimorphic Avian Scavenger

被引:42
|
作者
Lambertucci, Sergio A. [1 ]
Carrete, Martina [2 ,3 ]
Antonio Donazar, Jose [3 ]
Hiraldo, Fernando [3 ]
机构
[1] Univ Nacl Comahue, CONICET, INIBIOMA, Lab Ecotono, San Carlos De Bariloche, Rio Negro, Argentina
[2] Univ Pablo Olavide, Dept Phys Chem & Nat Syst, Seville, Spain
[3] CSIC, Estac Biol Donana, Dept Biol Conservac, E-41080 Seville, Spain
来源
PLOS ONE | 2012年 / 7卷 / 09期
关键词
ANDEAN CONDORS; COMMUNAL ROOSTS; VULTUR-GRYPHUS; HABITAT USE; POPULATION; SIZE; SEGREGATION; COMPETITION; ARGENTINA; PATAGONIA;
D O I
10.1371/journal.pone.0046347
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Age-dependent skewed sex ratios have been observed in bird populations, with adult males generally outnumbering females. This trend is mainly driven by higher female mortality, sometimes associated with anthropogenic factors. Despite the large amount of work on bird sex ratios, research examining the spatial stability of adult sex ratios is extremely scarce. The Andean condor (Vultur gryphus) is the only bird of prey with strong sexual dimorphism favouring males (males are 30% heavier than females). By examining data from most of its South-American range, we show that while the juvenile sex ratio is balanced, or even female-skewed, the sex ratio becomes increasing male-skewed with age, with adult males outnumbering females by >20%, and, in some cases by four times more. This result is consistent across regions and independent of the nature of field data. Reasons for this are unknown but it can be hypothesized that the progressive disappearance of females may be associated with mortality caused by anthropogenic factors. This idea is supported by the asymmetric habitat use by the two sexes, with females scavenging in more humanized areas. Whatever the cause, male-skewed adult sex ratios imply that populations of this endangered scavenger face higher risks of extinction than previously believed.
引用
收藏
页数:6
相关论文
共 50 条
  • [1] Age-Dependent Sexually-Dimorphic Asymmetric Development of the Ferret Cerebellar Cortex
    Sawada, Kazuhiko
    Aoki, Ichio
    [J]. SYMMETRY-BASEL, 2017, 9 (03):
  • [2] Sex- and age-dependent patterns of survival and breeding success in a long-lived endangered avian scavenger
    Sanz-Aguilar, Ana
    Cortes-Avizanda, Ainara
    Serrano, David
    Blanco, Guillermo
    Ceballos, Olga
    Grande, Juan M.
    Tella, Jose L.
    Donazar, Jose A.
    [J]. SCIENTIFIC REPORTS, 2017, 7
  • [3] Sex- and age-dependent patterns of survival and breeding success in a long-lived endangered avian scavenger
    Ana Sanz-Aguilar
    Ainara Cortés-Avizanda
    David Serrano
    Guillermo Blanco
    Olga Ceballos
    Juan M. Grande
    José L. Tella
    José A. Donázar
    [J]. Scientific Reports, 7
  • [4] Large-scale identification of proteins involved in the development of a sexually dimorphic behavior
    Zupanc, Guenther K. H.
    Ilies, Iulian
    Sirbulescu, Ruxandra F.
    Zupanc, Marianne M.
    [J]. JOURNAL OF NEUROPHYSIOLOGY, 2014, 111 (08) : 1646 - 1654
  • [5] AGE-DEPENDENT CHANGES IN BLOOD-COUNT OF GILTS IN LARGE-SCALE PIGGERIES
    HLOUSEK, A
    [J]. ACTA VETERINARIA BRNO, 1978, 47 (1-2) : 7 - 13
  • [6] The developmental effect of sex ratio on a sexually dimorphic scale count in the garter snake Thamnophis elegans
    Osypka, NM
    Arnold, SJ
    [J]. JOURNAL OF HERPETOLOGY, 2000, 34 (01) : 1 - 5
  • [8] Sex differences in language asymmetry are age-dependent and small: A large-scale, consonant-vowel dichotic listening study with behavioral and fMRI data
    Hirnstein, Marco
    Westerhausen, Rene
    Korsnes, Maria S.
    Hugdahl, Kenneth
    [J]. CORTEX, 2013, 49 (07) : 1910 - 1921
  • [9] Sexually dimorphic genetic architecture of complex traits in a large-scale F2 cross in pigs
    Cui, Leilei
    Zhang, Junjie
    Ma, Junwu
    Guo, Yuanmei
    Li, Lin
    Xiao, Shijun
    Ren, Jun
    Yang, Bin
    Huang, Lusheng
    [J]. GENETICS SELECTION EVOLUTION, 2014, 46
  • [10] Sexually dimorphic genetic architecture of complex traits in a large-scale F2 cross in pigs
    Leilei Cui
    Junjie Zhang
    Junwu Ma
    Yuanmei Guo
    Lin Li
    Shijun Xiao
    Jun Ren
    Bin Yang
    Lusheng Huang
    [J]. Genetics Selection Evolution, 46