Stream Gradient as a Criterion of Lotic Habitats Suitable for Australorbis Glabratus in Puerto Rico

1 September 1956

journal article
research article
Published by American Society of Tropical Medicine and Hygiene in The American Journal of Tropical Medicine and Hygiene

Vol. 5 (5) , 921-928
https://doi.org/10.4269/ajtmh.1956.5.921

Abstract

Summary In the examination of more than 350 collecting stations it was observed that populations of Australorbis glabratus, the vector for Schistosoma mansoni in Puerto Rico, are not maintained in reaches of streams steeper than 20 meters fall per 1000 meters of length. Water quality and other factors apparently cause the spotty distribution observed in reaches with suitable gradients.

Keywords

SNAILS