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  • Title: Population dynamics of Australorbis glabratus in Puerto Rico.
    Author: RITCHIE LS, RADKE MG, FERGUSON FF.
    Journal: Bull World Health Organ; 1962; 27(1):171-81. PubMed ID: 14492504.
    Abstract:
    This report on the population dynamics of Australorbis glabratus in Puerto Rico is based on observations made over about two years at 50 collecting-sites in a representative range of snail habitats. In some places a marked predominance of Tropicorbis was noted. No continuous or seasonal propagation of Australorbis was apparent. Dense populations seldom prevailed for more than a few months, and in most places very low population levels occurred at irregular intervals, and colony decimations were fairly common. A variety of pressures is exerted on Australorbis in Puerto Rico by a multiplicity of natural factors; detailed knowledge of this snail's natural history in the field is necessary for effective bilharziasis control and for a full understanding of the regional epidemiology of this disease.
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