Contribution à l'élevage de l'escargot Petit-gris : Helix aspersa Müller (Mollusque gastéropode pulmoné stylommatophore). II. - Evolution de la population juvénile de l'éclosion à l'âge de 12 semaines, en bâtiment et en conditions d'élevage contrôlées

Open Access
Publisher Website
Google Scholar
Abstract
The main results concerning the 2nd phase of snail rearing, i.e., development and growth of juveniles in heated houses (20.degree. C) with controlled hygrometry are given. The relatively low mortality after 14 days, reached 28% on day 42; it was thereafter higher in small-sized (21%) than in large-sized snails (5%). The relative homogeneity of juveniles at hatching rapidly disappeared and a marked size heterogeneity of the snails was observed thereafter. The production varied according to the biotic load. Production of individuals born the latest during the same hatching period seemed to be largest. If the big snails were separated from the smaller ones, a certain stability in the homogeneity of the large-sized snails was observed as well as a recovery of the growth delay in the smaller sized individuals.