Behavioral influences on gene structure and other new ideas concerning sex change in fishes
Identifieur interne : 000861 ( Main/Exploration ); précédent : 000860; suivant : 000862Behavioral influences on gene structure and other new ideas concerning sex change in fishes
Auteurs : Y. Shapiro [États-Unis]Source :
- Environmental Biology of Fishes [ 0378-1909 ] ; 1988-12-01.
Abstract
Synopsis: The interpretation of experiments, designed to reveal whether sex change is induced behaviorally, can influence the type of physiological mechanism we propose to underlie sex change. Mechanisms involving stimulation differ from mechanisms of disinhibition and each is inferred from different ways of conceptualizing behavioral experiments. Both types of mechanism are likely to involve CNS, hypothalamus, pituitary, and gonad. Recent work, however, also implicates H-Y antigen and Bkm satellite DNA in the sex-change process. These studies raise the exciting possibility that the changes in behavioral relationships between the sexes that induce sex change also produce changes in certain aspects of DNA. The nature of the proximate causes of sex change plays a surprisingly important role in influencing evolutionary models of sex change. Such models can be evaluated by first examining their applicability to real populations and, if they are applicable, then testing their validity by comparing their predictions with observed data. The size advantage model, in spite of its proven ability to stimulate and direct research, does not fare well in either of these stages of evaluation. The basic weakness of the model is its failure to incorporate individual adaptability into the life history of sex-changing fishes.
Url:
DOI: 10.1007/BF00005240
Affiliations:
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