Etude de trois populations de Viviparus malleatus (Reeve) (Gastropoda, Prosobranchia) de la région de Montréal. II. Etude qualitative et quantitative de la nourriture

Autor:	Marcin Plinski, Anna Stanczykowska, Etienne Magnin
Rok vydání:	1972
Předmět:	biology Algae Habitat Ecology Food habits Animal Science and Zoology Digestive tract biology.organism_classification Fecundity Population density Viviparus Ecology Evolution Behavior and Systematics
Zdroj:	Canadian Journal of Zoology. 50:1617-1624
ISSN:	1480-3283 0008-4301
DOI:	10.1139/z72-213
Popis:	The contents of the digestive tracts of specimens of Viviparus malleatus were estimated quantitatively by a volumetric method and qualitatively by using the ratio algae/other elements present. Types of algae used by these specimens were also determined. Qualitative and quantitative variations in food habits were studied in relation to size, sex, and degree of maturity of individuals, and also with habitat and seasons of the year. The quantity of food available seems to affect the population density while food quality affects growth, fecundity, and production.
Databáze:	OpenAIRE
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