Biology of Biomphalaria occidentalis Paraense, 1981 and Biomphalaria tenagophila (d'Orbigny, 1835), in laboratory conditions

Specimens of Biomphalaria occidentialis and Biomphalaria tenagophila were reared in S. Paulo, Brazil under laboratory conditions, with a view to know their biological characteristics. Oviposition and eggs/oviposition ratio were recorded over twelve months so as to obtain information on the number of...

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Bibliographic Details
Published in:Revista de saúde pública 1992-10, Vol.26 (5), p.343-349
Main Authors: Elmor, M R, Vaz, J F, Gonçalves, L M
Format: Article
Language:Portuguese
Subjects:
Animals
Biomphalaria - classification
Biomphalaria - embryology
Biomphalaria - physiology
Fertility
Laboratories
Time Factors
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Summary:Specimens of Biomphalaria occidentialis and Biomphalaria tenagophila were reared in S. Paulo, Brazil under laboratory conditions, with a view to know their biological characteristics. Oviposition and eggs/oviposition ratio were recorded over twelve months so as to obtain information on the number of egg-masses per animal and the number of eggs per egg-mass, as also the number of hatched eggs per egg-mass for each period of 30 days, i.e., the hatching-rate per period. The incubation period was about the same for both species, but the oviposition and egg oviposition ratio were greater in B. tenagophila.
ISSN:0034-8910