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https://www.arca.fiocruz.br/handle/icict/41177
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ArtigoDireito Autoral
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- IOC - Artigos de Periódicos [12500]
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INTERACTION BETWEEN THE INTERMEDIATE HOST OF SCHISTOSOMIASIS IN BRAZIL BIOMPHALARIA GLABRATA (PLANORBIDAE) AND A POSSIBLE COMPETITOR MELANOIDES TUBERCULATA (THIARIDAE): I. LABORATORY EXPERIMENTS
Afiliação
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Biologia. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Departamento de Ecologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Biologia. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Departamento de Ecologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Biologia. Rio de Janeiro, RJ, Brasil.
Resumo
The biological control of Biomphalaria glabrata, intermediate host of Schistosoma mansoni, is one the accepted
options to fight schistosomiasis. One of the most promising candidates to control B. glabrata is the snail Melanoides
tuberculata, a potential competitor. However, the mechanisms of interaction between the two species are not clear.
Our objective is to determine if M. tuberculata indeed compete with B. glabrata, using two laboratory experiments.
In Experiment 1, we tested the effect of the presence of M. tuberculata on the fecundity and mortality rates of B.
glabrata. In Experiment 2, we tested if there was a direct or indirect interaction between the two species. In Experiment 1, M. tuberculata was eliminated after the peak in reproductive activity of B. glabrata. In Experiment 2, B.
glabrata produced more egg masses when raised with M. tuberculata. The conditions leading to this unexpected
positive effect of M. tuberculata on the fecundity of B. glabrata need further clarification, but emphasize that detailed
studies of the interaction between these species in the conditions of the local environment should be considered.
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