Journal
MEMORIAS DO INSTITUTO OSWALDO CRUZ
Volume 96, Issue -, Pages 173-176Publisher
FUNDACO OSWALDO CRUZ
DOI: 10.1590/S0074-02762001000900027
Keywords
interspecific competition; Melanoides tuberculata; Biomphalaria glabrata; Biomphalaria straminea; Brazil
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Several species of snails, including Pomacea haustrum, Marisa cornuarietis and Helisoma duryi, have been identified as probable competitors and/or predators of planorbid intermediate hosts of Schistosoma. During the last few years, studies carried out in the Caribbean region have shown reductions and even disappearances of populations of Biomphalaria glabrata and B. straminea. in breeding places where the snail Melanoides tuberculata was introduced. Observations made over a period of 10 years in two lakes close to Belo Horizonte, MG, showed that there were marked reductions in autochthonous populations of B. glabrata and B. straminea after the arrival of M. tuberculata, both Biomphalaria species disappearing completely after eight years.
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