Population dynamics of aquatic snails in Pampulha reservoir
Mem. Inst. Oswaldo Cruz
;
82(supl.4): 299-305, 1987. graf
Article
in English
| LILACS
| ID: lil-623712
ABSTRACT
An attempt was made to determine more accurately the density of molluskan populations in the Pampulha reservoir, using the quadrate method, intending to detect the fluctuation of the populations density, the habitat conditions and the possible competitive interactions among Biomphalaria tenagophila, Melanoides tuberculata, Pomacea haustrum and Biomphalaria glabrata, through the analysis of populational parameters. Among the most significative facts observed in the reservoir it has to be mentioned: the almost disappearance of B. glabrata; the invasion, colonization, fixation and fast growing of M. tuberculata population until reaching about 11,000 individuals/[square metre]; the density fluctuations of B. tenagophila, P. haustrum and M. tuberculata alives and deads; differences on the habitat preference of these three molluskan species at the edge (at the limit earth-water, at 0.70m and 1.40m from the shore line); monthly mortality rates and reproduction seasons of the species.
Full text:
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Index:
LILACS (Americas)
Main subject:
Snails
/
Water Supply
/
Biomphalaria
/
Fresh Water
Limits:
Animals
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
1987
Type:
Article
/
Congress and conference
Affiliation country:
Brazil
Institution/Affiliation country:
UFMG/BR
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