Adult sex ratio effects on male survivorship of Drosophila melanogaster Meigen (Diptera, Drosophilidae)

The behavioral biology has a central role in evolutionary biology mainly because the antagonistic relations that occur in the sexual reproduction. One involves the effect of reproduction on the future life expectation. In this scenario, changes in male operational sex ratio could lead to an increase...

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Bibliographic Details
Published in:	Revista brasileira de entomologia Vol. 54; no. 3; pp. 446 - 449
Main Authors:	Costa, M, Mateus, R P, Moura, MO, de Barros Machado, LP
Format:	Journal Article
Language:	Portuguese
Published:	01-07-2010
Subjects:	Courtship Diptera Drosophila melanogaster Drosophilidae Entropy Evolution Mating Mortality Reproduction Sex Sex ratio Sexual reproduction Survival
Online Access:	Get full text
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Summary:	The behavioral biology has a central role in evolutionary biology mainly because the antagonistic relations that occur in the sexual reproduction. One involves the effect of reproduction on the future life expectation. In this scenario, changes in male operational sex ratio could lead to an increase in mortality due to costs associated with excessive courtship and mating displays. Thus, this work experimentally altered the male sex ratioof Drosophila melanogaster Meigen, 1830, to determine its impact on mortality. The results indicated that mortality increases as the sex ratio changes, including modifications in the survivorship curve type and in the curve concavity, measured by entropy.Original Abstract: A biologia comportamental tern um papel central na biologia evolutiva principalmente pelas relacoes antagonicas que ocorrem na reproducao sexuada. Uma destas relacoes envolve o efeito da reproducao sobre a expectativa de vida futura. Neste cenario, alteracoes na razao sexual operacional de machos podem levar a um aumento na mortalidade por causa dos custos associados com o excesso de displays de corte e copulas. Neste sentido este trabalho alterou experimentalmente a razao sexual em machos de Drosophila melanogaster Meigen, 1830, para determinar os efeitos em termos de mortalidade. Os resultados indicam que a mortalidade aumenta a medida que a razao sexual se enviesa incluindo alteracoes no tipo de curva de sobrevivencia e da concavidade da curva, medida pela entropia.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 content type line 23 ObjectType-Feature-1
ISSN:	0085-5626