Estratégia competitiva entre Biomphalaria glabrata e Biomphalaria tenagophila: estudos de laboratório / Competitive strategy between Biomphalaria glabrata and Biomphalaria tenagophila: laboratory studies
Mem. Inst. Oswaldo Cruz
;
84(supl.1): 156-178, 1989. tab, graf
Article
in Portuguese
| LILACS
| ID: lil-623575
ABSTRACT
Observation about conhabitation among B. glabrata and B. tenagophila revealed a greater vulnerability of B. tenagophila population during the process of competition when its density was severaly decreased in 12 trials, moderate in 2 trials. It was higher than B. glabrata in only one trial. Some snail water chemical parameters analysed such as pH, alkalinity, conductivity and oxygen dissolve, an the viability rate of batch of eggs didn't give subsidy to explain the competition mechanism. The newly-born survival, in the situation of cohabitation, was low for both species. This reveals the existence of intra and interspecific competitive interacition. The fertility rate reduction of B. tenagophila during the cohabitation was considered as a cause of its exlusion. One of the factors that seems to have influenced the fertility rate was a possible wrong crossing.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Biomphalaria
/
Candida glabrata
Limits:
Animals
Language:
Portuguese
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
1989
Type:
Article
/
Congress and conference
Affiliation country:
Brazil
Institution/Affiliation country:
UFMG/BR
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