Forebrain AVT and courtship in a fish with male alternative reproductive tactics
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چکیده
منابع مشابه
Forebrain AVT and courtship in a fish with male alternative reproductive tactics.
In this paper, we present the results of cellular and molecular studies on the neuroendocrine correlates of male sexual polymorphism in a population of the blenniid fish Salaria pavo (Risso). Bigger and older males defend nests, whereas smaller and younger males mimic female nuptial coloration and behavior to gain access to nests and sneak fertilizations. In this population, sex-role reversal i...
متن کاملAlternative reproductive tactics in fish
Among vertebrates, fish show by far the greatest variability of alternative reproductive tactics (ARTs). Usually, males attempting to monopolize access to females or fertilizations are parasitized by conspecific male competitors (Taborsky 1997). This is so common in fish (Mank and Avise 2006) that it appears to be the rule rather than the exception: in fish with external fertilization, 170 spec...
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In species with indeterminate growth, age-related size variation of reproductive competitors within each sex is often high. This selects for divergence in reproductive tactics of same-sex competitors, particularly in males. Where alternative tactics are fixed for life, the causality of tactic choice is often unclear. In the African cichlid Lamprologus callipterus, large nest males collect and p...
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John L. Fitzpatrick,a,b,c, David J.D. Earn,d Carol Bucking,b,c Paul M. Craig,b,c Sunita Nadella,b,c Chris M. Wood,b,c and Sigal Balshinee aComputational and Evolutionary Biology, Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK, bDepartment of Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada, cBamfield Marine Sciences Centre, 100 P...
متن کاملSteroid hormones in bluegill, a species with male alternative reproductive tactics including female mimicry.
The proximate mechanisms underlying the evolution and maintenance of within-sex variation in mating behaviour are still poorly understood. Species characterized by alternative reproductive tactics provide ideal opportunities to investigate such mechanisms. Bluegill (Lepomis macrochirus) are noteworthy in this regard because they exhibit two distinct cuckolder (parasitic) morphs (called sneaker ...
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ژورنال
عنوان ژورنال: Brain Research Bulletin
سال: 2002
ISSN: 0361-9230
DOI: 10.1016/s0361-9230(01)00704-3