Sex-Typed Social Development in Lemur catta.

Stephanie L Meredith
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引用次数: 3

Abstract

Strong chemical control of strepsirrhine mating behaviour when compared to haplorhines might suggest that strepsirrhine behavioural development, generally, is under stronger somatic control. A comparative lack of reported behavioural sex differences in immature strepsirrhines would seem to support this hypothesis, but the recent discovery of sex differences in juvenile foraging behaviour in Lemur catta suggests that this difference might be an artefact of undersampling in strepsirrhines. Here, I document in wild L. catta the temporal development of a wider repertoire of social behaviours than have been studied in captivity over a longer developmental duration than has been studied in the wild to identify which behaviours might be and which cannot be linked to puberty. Sex differences in proximity and agonism did not appear before 2 years, consistent with previous reports and suggestions that they are linked to somatic or social changes at puberty. Immature females exhibited adult female-typical interest in infants; immature males demonstrated elements of adult male scent-marking behaviour, and immature males demonstrated marked attraction to adult males - sex differences that cannot be dependent on gonadal maturation. Immature L. catta exhibited some sex differences common in immature haplorhines, which are thought to be strategic choices by immatures to increase their later reproductive success.

狐猴性别型社会发展。
与单链虫相比,强化学控制的链虫交配行为可能表明,链虫的行为发育通常受到更强的体细胞控制。在未成熟的链鼻虫中,相对缺乏行为性别差异的报道似乎支持了这一假设,但最近发现的狐猴幼年觅食行为的性别差异表明,这种差异可能是链鼻虫取样不足的人工产物。在这里,我在野生羊绒猴中记录了更广泛的社会行为的暂时发展,而不是圈养的研究,在更长的发育时间内,比在野外研究的更长,以确定哪些行为可能与青春期有关,哪些行为不可能与青春期有关。接近性和激动性的性别差异在2岁之前没有出现,这与之前的报道和建议一致,即它们与青春期的身体或社会变化有关。未成熟雌性表现出成年女性对婴儿的典型兴趣;未成熟雄性表现出成年雄性气味标记行为的元素,未成熟雄性表现出对成年雄性的明显吸引力——性别差异不能依赖于性腺成熟。未成熟的L. catta表现出一些在未成熟单倍体中常见的性别差异,这被认为是未成熟的策略选择,以提高其后期的繁殖成功率。
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