Androgens and Immune Function in Male Alternative Reproductive Morphotypes of the Peacock BlennySalaria pavo
نویسندگان
چکیده
منابع مشابه
Social cues in the expression of sequential alternative reproductive tactics in young males of the peacock blenny, Salaria pavo.
Phenotypic change in response to variation in environmental cues has been widely documented in fish. Transitions in social dominance, in particular, have been shown to induce a rapid switch in reproductive phenotypes in many species. However, this effect has been mainly studied in adults and focused on behavioural transitions. The way social cues constraint the phenotypic development of juvenil...
متن کاملThe effect of nest aggregation on the reproductive behaviour of the peacock blenny Salaria pavo.
The effect of nest aggregation in courtship behaviour was tested experimentally in an ecologically constrained, sex-role reversed population of the peacock blenny Salaria pavo. Mixed sex groups of eight males and eight females were tested in experimental tanks, containing eight potential nests either aggregated or dispersed. In the aggregated treatment, males spent more time inside their nests ...
متن کامل11-Ketotestosterone inhibits the alternative mating tactic in sneaker males of the peacock blenny, Salaria pavo.
In the peacock blenny, Salaria pavo, a species with courtship sex-role reversal, smaller, younger males mimic the courtship behavior and the nuptial coloration of females in order to get access to nests during spawning and to parasitize egg fertilization from nest-holder males. Later in their life, sneakers transform both morphologically and behaviorally into nest-holder males. In the present p...
متن کاملDistribution of chewing lice upon the polygynous peacock Pavo cristatus.
An opportunistic survey of louse distribution upon the peacock Pavo cristatus was undertaken following a cull of 23 birds from an English zoo. After complete skin and feather dissolution, 2 species of lice were retrieved, Goniodes pavonis and Amyrsidea minuta. The distribution of both louse species could be described by a negative binomial model. The significance of this is discussed in relatio...
متن کاملMale sexual polymorphism, alternative reproductive tactics, and androgens in combtooth blennies (pisces: blenniidae).
In species in which intense intermale competition for the access to females is present males of lower competitive ability may adopt alternative reproductive tactics (ART) to get access to mates. These ART translate in many cases into male sexual polymorphism, with individuals following distinctly different tactics. Usually two alternative male morphs can be recognized in species with ART: (1) b...
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ژورنال
عنوان ژورنال: Ethology
سال: 2009
ISSN: 0179-1613,1439-0310
DOI: 10.1111/j.1439-0310.2009.01636.x