Sex Reversal in Pairs of Lythrypnus dalli: Behavioral and Morphological Changes
نویسندگان
چکیده
منابع مشابه
Sex reversal in pairs of Lythrypnus dalli: behavioral and morphological changes.
In Lythrypnus dalli, the bluebanded goby, reproductive success is primarily determined by functional sex, and functional sex is determined largely by rank in the dominance hierarchy. In most natural social groups of L. dalli, one male is at the apex of the hierarchy, and 1 to 7 females are lower in rank. When a male exits the group, a female ascends to the top of the hierarchy and becomes a mal...
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The neurohypophyseal peptides are evolutionarily conserved and their expression can be socially modulated. Our question was what effect will socially induced sex change have on forebrain isotocin, an oxytocin homologue? We removed males from social groups to induce dominant females to change sex and become males in Lythrypnus dalli. Fish in the late stages of sex change had fewer forebrain isot...
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In a variety of vertebrates, highly aggressive individuals tend to have high social status and low serotonergic function. In the sex changing fish Lythrypnus dalli, serotonin (5-HT) may be involved as a mediator between the social environment and the reproductive system because social status is a critical cue in regulating sex change. Subordination inhibits sex change in L. dalli, and it is ass...
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The neurotransmitter serotonin (5-HT) has been suggested to be involved in the inhibition of socially regulated sex change in fish because of its role in the modulation of both reproductive and aggressive behavior. This is the first study looking at the distribution of serotonergic neurons by immunohistochemical techniques at different times during sex change. We set up stable social groups wit...
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The behavioural mechanisms and patterns of protandrous sex change in bluebanded gobies Lythrypnus dalli were investigated and compared to the well-described behaviour patterns of protogynous sex change. To do this, unisex groups of males and females were established; behavioural and anatomical changes were recorded over a 42 day period as social status and sexual phenotype were determined. In a...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 2005
ISSN: 0006-3185,1939-8697
DOI: 10.2307/3593120