Current advances on the study of snail-snail interactions, with special emphasis on competition process

Memórias do Instituto Oswaldo Cruz

José Rabelo De Freitas¹  Mairy Barbosa Loureiro Dos Santos¹ 

[1] ,Universidade Federal de Minas Gerais ICB Departamento de Biologia GeralBelo Horizonte,Brasil

关键词: biological control;    snail competition;    Biomphalaria tenagophila;    Melanoides tuberculata;   

DOI  :  10.1590/S0074-02761995000200024

来源: SciELO

【 摘 要 】

Field work research on population dynamic of snails from the regions of Belo Horizonte and Lagoa Santa give much information about interactions among two or more species of mollusks: Pomacea haustrum, Biomphalaria glabrata, B. tenagophila, B. straminea and Melanoides tuberculata. Data ranging from two years to several decades ago suggest that the Pampulha reservoir is like a cemetery of B. glabrata and B. straminea, species that coexist for more than 14 years in a small part of a stream, whereas only B. glabrata lives in all the streams of the basin. In the last ten to twenty years B. tenagophila has coexisted with P. haustrum and M. tuberculata in the Serra Verde ponds and in the Pampulha dam. However these species have not settled in any of the brooks, except temporarily. The data suggest that the kind of biotope and the habitat conditions are decisive factors for the permanence of each species in its preferencial biotope. B. glabrata, natural from streams and riverheads, quickly disappears from the reservoirs and ponds where it coexists with other species for a short time, independently of the competitive process. Competition needs to be better studied, since in Central America and Caribean islands this kind of study has favored the biological control of planorbid species.

【 授权许可】

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