Failures of reproductive suppression in dwarf mongooses (Helogale parvula): accident or adaptation?
Failures of reproductive suppression in dwarf mongooses (Helogale parvula): accident or adaptation?
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DOI：
10.1093/beheco/2.1.7
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发表时间：
1991-03-01
影响因子：
2.4
通讯作者：
Waser, Peter M.
中科院分区：
文献类型：
--
作者：
Creel, Scott R.;Waser, Peter M.
在许多群体繁殖的物种中，只有占主导地位的雌性正常繁殖，而从属则忍受繁殖抑制（用 Brown, 1987 年的术语来说，这些是“专制”物种；Macdonald 和 Moehlman, 1983；Vehrencamp, 1983）。然而，在许多以繁殖抑制为常态的物种中（跨多种类群），下属偶尔也会繁殖。由于从属繁殖对于这些物种来说是非典型的，因此通常被认为是正常抑制机制的简单失败。另一种假设是，从属怀孕代表了统治者和从属者之间的进化妥协，其中统治者承认他们对繁殖的垄断，以保留帮助者。我们使用坦桑尼亚塞伦盖蒂国家公园矮獴 (Helogale parvula) 的长期研究数据来检验这一假设，并使用改编自 Vehrencamp (1983) 模型的包容性适应性模型。我们发现，次级妊娠的发生率与模型预测的结果非常吻合，这表明矮獴的生殖抑制机制根据社会和人口环境进行了精细调整。 [行为生态学 1991； 2：7-15]
In many communally breeding species, only the dominant female normally breeds, while subordinates tolerate reproductive suppression (these are "despotic" species, in the terminology of Brown, 1987; Macdonald and Moehlman, 1983; Vehrencamp, 1983). Yet in many species for which reproductive suppression is the norm (across a wide variety of taxa), subordinates do occasionally breed. Because reproduction by subordinates is atypical for these species, it is often regarded as simple failure of the normal mechanisms of suppression. An alternate hypothesis is that subordinate pregnancies represent an evolutionary compromise between dominant and subordinate, in which dominants concede their monopoly on reproduction in order to retain helpers. We use data from a long-term study of dwarf mongooses (Helogale parvula) in Serengeti National Park, Tanzania, to test this hypothesis, using an inclusive fitness model adapted from one by Vehrencamp (1983). We find that the incidence of subordinate pregnancy closely matches that predicted by the model, suggesting that the mechanisms that underlie reproductive suppression in dwarf mongooses are finely adjusted to the social and demographic environment. [Behav Ecol 1991; 2: 7-15]