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Title: Influence of experimental illumination and seasonal variation on crossbreeding matinf in the snail Biomphalaria glabrata.
Authors: Souza, Fernando Pimentel
Schall, Virgínia Torres
Barbosa, Norma Dulce de Campos
Souza, Mauro Schettino de
Lautner Júnior, Rodolfo
Keywords: Biomphalaria glabrata
Seasonal variation
Crossbreeding mating
Sexual behavior
Issue Date: 1988
Citation: SOUZA, F. P. et al. Influence of experimental illumination and seasonal variation on crossbreeding matinf in the snail Biomphalaria glabrata. Memórias do Instituto Oswaldo Cruz, Rio de Janeiro, v. 83, n.1, p. 79-85, 1988. Disponível em:<>. Acesso em: 15 out. 2014.
Abstract: The crossbreeding activities of the Schistosoma mansoni vector snail Biomphalaria glabrata were counted in a laboratory aquarium throughout the year under two regimes of 12h light: 12h dark from 7 A., M. to 10 P. M. Mating increased significantly in Authmn and Winter and just missed a significant inverse correlation with temperature and a direct one with locomotion. Other similar experiments were carried out to compare mating under various ilumination conditions in complete daily cycle measurements. Mating counts decreased under the regimes which submited snail to a total exposure of 12h light and 12 dark during a daily cycle in the following sequence: 12h light: 12h dark alternating hourly with light gradient, 12h light: 12h dark, 1h light: 1h dark and 12h dark: 12h light. Under two constant illuminations, the mating scored less than under the previous conditions, except under 12h light. Under darkeness the mating count was lower than light conditions. There was no way to differentiate the night and day rhythms of mating on different days in each regime, except for mating under 12h light: 12 dark alternating with light gradient, constant dark and 12h dark: 12h light conditions. Mating increased in certain light and temperature conditions, in wich the intensities, should have an optimum value.
ISSN: 0074-0276
metadata.dc.rights.license: O periódico Memórias do Instituto Oswaldo Cruz permite que o Repositório Institucional da Universidade Federal de Ouro Preto (UFOP) deposite uma cópia eletrônica dos artigos publicados por esse periódico  em que ao menos um dos autores faça parte da comunidade cientifica da UFOP. Fonte: Licença concedida mediante preenchimento de formulário enviado em 12 dez. 2013.
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