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首页> 外文期刊>The wilson journal of ornithology >SEX-SPECIFIC FORAGING DURING PARENTAL CARE IN A SIZE-MONOMORPHIC SEABIRD, THE AUSTRALASIAN GANNET (MORUS SERRATOR)
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SEX-SPECIFIC FORAGING DURING PARENTAL CARE IN A SIZE-MONOMORPHIC SEABIRD, THE AUSTRALASIAN GANNET (MORUS SERRATOR)

机译：大小单亲海鸟，澳大利亚单性塘鹅（蠕虫）在母体关怀期间的性行为

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摘要

Sex differences in foraging behavior are typically studied in size-dimorphic taxa. Data on sex-specific behavior in monomorphic taxa arc needed to test theories of reproductive investment. It has been suggested that in seabirds foraging niche separation may be related to decreased intersexual competition for food between cooperating pair-bonded individuals. Alternatively, sex differences in foraging niches may be driven by different nutritional requirements of females associated with the reproductive costs of egg production and oviposition. To assess these possibilities, we studied a size-monomorphic colonial seabird, the Australasian Gannet (Morns serrator) at the Cape Kidnappers gannetry. New Zealand. We recorded maximum dive depths, and distinct diet composition of incubating females as indicated by stable isotopic signatures. Results suggested greater female foraging effort during early times of incubation, indicated by significantly deeper maximum dives. Sex-specific foraging patterns across other breeding stages were more variable. Nitrogen stable isotopic values showed that incubating females occupied a different trophic position compared to males at the same breeding stage, and also from those of gannets of both sexes at later stages of parental care. Overall, the data arc consistent with cost-of-oviposition compensation in females necessitating male-bias in parental care in biparental breeders. Further research is needed to unravel the implications of nutritional needs for the evolution of sex differences in behavior in this and other monomorphic taxa.
机译：觅食行为的性别差异通常在大小双态分类单元中进行研究。检验生殖投资理论需要有关单态分类群中特定性别行为的数据。已经提出，在海鸟中觅食的生态位分离可能与减少伴侣间成对的食物之间的性欲竞争有关。另外，觅食ni的性别差异可能是由于雌性对营养的需求与产卵和产卵的生殖成本有关而引起的。为了评估这些可能性，我们研究了绑架海角（Cape Kidnappers）塘鹅上一只大小单一的殖民海鸟，澳大利亚的塘鹅（Morns serrator）。新西兰。我们记录了最大的潜水深度，并通过稳定的同位素特征表明了正在孵化的雌性的不同饮食组成。结果表明，在孵化初期，雌性觅食工作量更大，最大潜水次数明显增加。其他育种阶段的性别特定觅食模式变化更大。氮稳定的同位素值表明，与处于育种阶段的雄性相比，在雌性中孵化的雌性与雄性相比具有不同的营养位置，并且在父母关怀的后期阶段，来自两个性别的塘鹅。总体而言，该数据与女性的产卵补偿相一致，因此双亲育种家的父母照护中需要男性偏见。需要进一步的研究来揭示营养需求对这一和其他单态分类群中行为性别差异演变的影响。

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  • 来源
    《The wilson journal of ornithology》 |2017年第1期|139-147|共9页
  • 作者

    S. M. H. ISMAR; D. RAUBENHEIMER; S. J. BURY; C. D. MILLAR; M. E. HAUBER;

  • 作者单位

    School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand Experimental Ecology—Food Webs, GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany;

    Faculty of Veterinary Science, University of Sydney, Sydney, Australia;

    National Institute for Water and Atmospheric Research, 301 Evans Bay Parade, Kilbirnie, Wellington, New Zealand;

    School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand;

    School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand Department of Psychology, Hunter College and the Graduate Center, City University of New York, USA.;

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  • 正文语种 eng
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  • 关键词

    Australasian Gannet; behavioral dimorphism; breeding ecology; Morus serrator; parental investment; sex bias;

    机译：澳洲塘鹅;行为二态性繁殖生态学;桑us父母投资;性别偏见;

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