Biomphalaria glabrata check for this species in other resources - Melanoides tuberculata check for this species in other resources - competition - schistosomiasis"/>
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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 97, No. 2, 2002, pp. 363-369
Bioline Code: oc02070
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 97, No. 2, 2002, pp. 363-369

 en Interaction between the Intermediate Host of Schistosomiasis in Brazil Biomphalaria glabrata check for this species in other resources (Planorbidae) and a Possible Competitor Melanoides tuberculata check for this species in other resources (Thiaridae): I. Laboratory Experiments
Alexandre Giovanelli; Marcus Vinícius Vieira & Cesar Luiz Pinto Ayres Coelho da Silva

Abstract

The biological control of Biomphalaria glabrata check for this species in other resources , intermediate host of Schistosoma mansoni check for this species in other resources , is one the accepted options to fight schistosomiasis. One of the most promising candidates to control B. glabrata is the snail Melanoides tuberculata check for this species in other resources , 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.

Keywords
Biomphalaria glabrata check for this species in other resources - Melanoides tuberculata check for this species in other resources - competition - schistosomiasis

 
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