Gregarious sexual segregation: the unusual social organization of the Malagasy narrow-striped mongoose (Mungotictis decemlineata)
Gregarious sexual segregation: the unusual social organization of the Malagasy narrow-striped mongoose (Mungotictis decemlineata)
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群居性别隔离：马达加斯加窄纹猫鼬 (Mungotictis decemlineata) 不寻常的社会组织
DOI：
10.1007/s00265-016-2113-3
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发表时间：
2016
影响因子：
2.3
通讯作者：
Kappeler PM
中科院分区：
文献类型：
--
作者：
Schneider TC ;Kappeler PM
摘要尽管两性之间的主要适应性决定因素不同，但社会性的成本和收益很少被评估。食肉目包括一些少数在社会组织中存在性别差异的哺乳动物物种，这为分别研究雄性和雌性社会提供了机会。轶事报告表明，马达加斯加窄条纹猫鼬（Mungotictis decemlineata）似乎具有不寻常和灵活的联想模式。因此，我们在马达加斯加西部进行了为期3年的实地研究，以描绘这种森林栖息物种的社会组织，并深入了解社会性的性别特异性决定因素。我们对40名成年个体（20名男性，20名女性）进行了系统的无线电跟踪，并在定期普查和行为观察中收集了额外的数据。我们发现男性和女性生活在小型的同性社会单位中。除了每年短暂的交配季节外，雄性形成了多达四只成年个体的稳定协会，当它们独自漫游时。男性家庭范围表现出高度的相互重叠，并包含了多达四个女性社会单位范围。雌性社会单位平均由2只成年雌性、1只幼崽和1只优势雌性的幼崽组成，并占据专属领地。雌单位全年稳定，其大小与家区大小无关，但家区大小在旱季显著增大。我们的分析表明，雄性和雌性的关系都可能通过对抗捕食者的利益而稳定下来，雌性从共同的资源防御中获得额外的利益。雄性为了暂时的繁殖机会而放弃了群体的安全。因此，反捕食者利益似乎有利于两性生活的群体，但性别特异性生殖适应性限制因素对这些单位的稳定性影响不同。本研究提出了一种以前未被研究过的马达加斯加特有食肉动物窄条纹猫鼬的性别特异性社会组织的新的详细结果。我们将我们的发现与社会生物学理论的重要假设联系起来。特别是，我们将结果与最接近的分类组猫鼬（猫鼬科）进行比较，其中长期研究对最近的理论发展做出了重大贡献。因此，这项研究对一个很大程度上未知的食肉动物群体的代表，可以有助于揭示食肉动物社会性的进化转变，以及对推动哺乳动物社会进化的机制的见解。
AbstractSex-specific costs and benefits of sociality are rarely evaluated, even though the main fitness determinants differ between the sexes. The Carnivora include some of the few mammalian species in which the sexes differ in social organization, providing an opportunity to study male and female sociality separately. Anecdotal reports indicated that Malagasy narrow-striped mongooses (Mungotictis decemlineata) appear to have unusual and flexible association patterns. We therefore conducted a 3-year field study in Western Madagascar to delineate the social organization of this forest-dwelling species and to obtain insights into sex-specific determinants of sociality. We conducted systematic radio tracking on 40 adult individuals (20 males, 20 females) and collected additional data during regular censuses and behavioral observations. We found males and females to live in small, same-sex social units. Males formed stable associations of up to four adult individuals, except for the short annual mating season, when they roamed by themselves. Male home ranges exhibited high mutual overlap and encompassed those of up to four female social unit ranges. Female social units were on average composed of two adult females, one juvenile, and one infant offspring of the dominant female and occupied exclusive territories. Female units were stable year-round and their size was unrelated to home range size, but home range sizes were significantly larger during the dry season. Our analyses indicate that both male and female associations are likely stabilized by antipredator benefits, with females accruing additional benefits from joint resource defense. Males trade off the safety in associations for temporary reproductive opportunities. Thus, antipredator benefits appear to favor group living in both sexes, but sex-specific reproductive fitness limiting factors affect the stability of such units differently.Significance statementThis study presents new detailed results on the sex-specific social organization of a previously unstudied endemic Malagasy carnivore, the narrow-striped mongoose. We relate our findings to important hypotheses of sociobiological theory. In particular, we evaluate the results in comparison to the closest related taxonomic group, the mongooses (Herpestidae), in which long-term studies have contributed substantially to the recent development of theories. Thus, this study on a representative of a largely unknown group of carnivores can contribute to revealing evolutionary transitions in carnivore sociality as well as insights into the mechanisms driving mammalian social evolution in general.
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影响因子：
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作者：
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DOI：
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期刊：
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影响因子：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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