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Article
Fetal Uterine Position Affects Copulation and Scent Marking by Adult Male Gerbils.

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Article
Intrauterine Positions and Testosterone Levels of Adult Male Gerbils Are Correlated.
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Year: 1992

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Abstract

Those male Mongolian gerbils (Meriones unguiculatus) that developed in intrauterine positions between two male fetuses had significantly higher levels of serum testosterone, as adults, than did those adult male gerbils that developed in intrauterine positions between two female fetuses. The endogenous testosterone levels of adult male gerbils were significantly positively correlated with both the sizes of their ventral scent glands and their frequencies of scent marking. We found no evidence of pulsatile release of testosterone in adult male gerbils


Article
Hormonal and Experiential Factors Influencing Parental Behavior in Male Rodents - An Integrative Approach.
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Year: 1993

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Parental behaviour in rodents has traditionally been modelled on studies of maternal behaviour in the female rat. Female parental behaviour is initiated by hormonal changes during pregnancy and parturition and by pup stimuli. Models of parental behaviour based on the neuroendocrine control of maternal behaviour are not appropriate for understanding male parental care. This paper examines seven factors which influence the initiation and maintenance of paternal behaviour in male rodents: (1) the mating system of the species; (2) the ecological conditions under which the animals live; (3) the male's social experience; (4) sexual experience and female stimuli; (5) pup stimuli; (6) hormonal changes in adult males in response to female and pup stimuli; and (7) neonatal hormone levels. The role of stimuli from the female and pups in activating the neuroendocrine changes which may facilitate the onset and maintenance of paternal behaviour is also described. The aim of the paper is to provide an integrative approach to the study of male parental care and to stimulate research on the hormonal and experiential factors underlying paternal behaviour in male rodents

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