Lamella formation and emigration from the water by a laboratory colony of Biomphalaria glabrata (SAY) in flow-through system
Mem. Inst. Oswaldo Cruz
;
87(supl.1): 87-90, 1992. tab
Article
in English
| LILACS
| ID: lil-116392
RESUMO
Lamella formation and emigration from the water were investigated in juvenile Biomphalaria glabrata reared at two temperatures in aquaria with a constant water flow. Most snails (97.4%) reared at the lower temperature (21- C) formed lamella at the shell aperture and emigrated from the water, whereas only 10.1% did so at 25- C. Eighty percent of emigrations at 21- C occurred within a period of 15 days, 70-85 days after hatching. A comparison of the studies done so far indicates that the phenomenon may be affected by the ageing of snail colonies kept in the laboratory and their geographic origin, rather than the rearing conditions. This hypothesis, however, requires experimental confirmation
Full text:
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Index:
LILACS (Americas)
Main subject:
Temperature
/
Biomphalaria
Limits:
Animals
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
1992
Type:
Article
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