Alternative reproductive tactics in female striped mice: Solitary breeders have lower corticosterone levels than communal breeders
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Alternative reproductive tactics in female striped mice: Solitary breeders have lower corticosterone levels than communal breeders.
Alternative reproductive tactics (ARTs), where members of the same sex and population show distinct reproductive phenotypes governed by decision-rules, have been well-documented in males of many species, but are less well understood in females. The relative plasticity hypothesis (RPH) predicts that switches between plastic ARTs are mediated by changes in steroid hormones. This has received much...
متن کاملAlternative reproductive tactics in female striped mice: heavier females are more likely to breed solitarily than communally.
Alternative reproductive tactics (ARTs) are discrete reproductive phenotypes governed by decision rules called strategies. ARTs are fixed for life in species with alternative strategies, while tactic expression is plastic in species with a single strategy. ARTs have been investigated in males of many species, but few studies have tested whether the same theoretical framework applies in females....
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متن کاملDifferences in prolactin levels between three alternative male reproductive tactics in striped mice (Rhabdomys pumilio).
In male fishes, birds and mammals, increased prolactin secretion is thought to play a role in species showing paternal behaviours. This hypothesis was investigated in the striped mouse (Rhabdomys pumilio). This paper compares serum prolactin levels in 71 free-living male striped mice following three different reproductive tactics: (i) paternal group-living breeders, (ii) alloparental philopatri...
متن کاملTestosterone levels in dominant sociable males are lower than in solitary roamers: physiological differences between three male reproductive tactics in a sociably flexible mammal.
The relative plasticity hypothesis predicts that alternative tactics are associated with changes in steroid hormone levels. In species with alternative male reproductive tactics, the highest androgen levels have usually been reported in dominant males. However, in sociable species, dominant males show amicable behaviors to gain access to females, which might conflict with high testosterone leve...
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ژورنال
عنوان ژورنال: Hormones and Behavior
سال: 2015
ISSN: 0018-506X
DOI: 10.1016/j.yhbeh.2015.03.004