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INFLUENCE OF ASSOCIATION ON THE SEXUAL PHASES OF GASTROPODS HAVING PROTANDRIC CONSECUTIVE SEXUALITY

W. R. Coe

Published 1938 in The Biological Bulletin

ABSTRACT

1. The functional sexual phases of four species of Pacific coast gastropods with protandric consecutive sexuality have been investigated with regard to the conditions which control the change of sexual phase and particularly with respect to the influence of association or mating on the individual's sexuality.2. In none of these species nor in six species previously studied is association a prerequisite for the development of the functional male phase, although isolation of these males after a prolonged mating period usually terminates the male phase promptly.3. In nine of the ten species studied intimate association or permanent mating of the young male with one or more individuals in the female phase tends to accentuate the masculine characteristics and to postpone sexual transformation by prolonging the male phase. In five of these ten species the influence of association is very conspicuous; in four it is apparent but not conspicuous; in only one is the evidence inconclusive.4. There seems to be no evi...

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