DIFFERENTIAL ALLOCATION AND SEXUAL ORNAMENTATION
نویسندگان
چکیده
منابع مشابه
Nonlinear and correlational sexual selection on 'honest' female ornamentation.
Female ornamentation has long been overlooked because of the greater prevalence of elaborate displays in males. However, the circumstances under which females would benefit from honestly signalling their quality are limited. Females are not expected to invest in ornamentation unless the fitness benefits of the ornament exceed those derived from investing the resources directly into offspring. I...
متن کاملSexual ornamentation, androgens and papillomatosis in male roach (Rutilus rutilus)
According to the immunocompetence handicap hypothesis, males with attractive sexual ornamentation are more handicapped than their less ornamented rivals because of the immunosuppressive androgens required for the production of secondary sexual characters. Here we studied the predictions of the hypothesis in a wild cyprinid fish, the roach (Rutilus rutilus). We assayed (1) sexual ornamentation (...
متن کاملSexual ornamentation reflects antibacterial activity of ejaculates in mallards.
Bacteria present in ejaculates can impair sperm function and reduce male reproductive success. Thus, selection should favour the evolution of antimicrobial defences to limit the detrimental effects of sperm-associated bacteria. Additionally, current hypotheses suggest that ornamental traits may signal information about the infection status of an individual or the ability of an individual to res...
متن کاملDevelopmental plasticity in sexual roles of butterfly species drives mutual sexual ornamentation.
Current explanations for why sexual ornaments are found in both sexes include genetic correlation, same sex competition, and mutual mate choice. In this study, we report developmental plasticity in mating behavior as induced by temperature during development in the butterfly Bicyclus anynana. Males and females reciprocally change their sexual roles depending on their larval rearing temperatures...
متن کاملSexual conflict and sex allocation.
There was an error in the above paper on page 660, in §2a. The fifth sentence in this section should have stated: 'A startling example of sibling – sibling sexual conflict is provided by Korsten et al. (2009) who show that female Soay sheep with a male twin have a lower birth weight than females born with a female twin.' Sexual conflict in twins: male co-twins reduce fitness of female Soay sheep.
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ژورنال
عنوان ژورنال: Evolution
سال: 1995
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1995.tb04459.x