| Issue |
Bull. Fr. Pêche Piscic.
Number 319, 1990
Spécial Colloque Truite commune(2ème partie)
|
|
|---|---|---|
| Page(s) | 181 - 196 | |
| DOI | https://doi.org/10.1051/kmae:1990004 | |
| Published online | 01 August 2008 | |
La truite commune (Salmo trutta L.) dans le Redon, un petit affluent du lac Léman : caractéristiques de la population en place (1983-1987) et premières données sur l'impact des relâchers d'alevins nourris
The brown trout (Salmo trutta L.) in the river Redon, a small tributary of Lake Leman : characteristics of river dwelling trouts during the years 1983 to 1987 and first data on the contribution of stocked prefed fry
1
INRA, Station d'Hydrobiologie Lacustre, BP 511, 75 avenue de Corzent-74203 THONON (France)
2
Université Mohammed 1 , Faculté des Sciences, Département de Biologie - OUJDA (Maroc)
L'article présente les caractéristiques (densité, mortalité apparente, croissance) de la population en place, juvéniles en particulier, dans un petit (10 km) affluent du lac Léman (58.240 ha) de 1983 à 1987. L'étude a été réalisée en tentant de distinguer la composante "recrutement naturel" de celle du repeuplement (deux origines : géniteurs de pisciculture ou de truite de lac). L'étude montre un net impact des relâchers en alevins nourris (3-4 cm) sur le recrutement en juvéniles 0+ et 1 +.
Abstract
The paper presents the characteristics (density, apparent mortality, growth) of resident brown trouts, juveniles particularly, in a small (10 km) tributary of Lake Leman (58.240 ha) from 1983 to 1987. The study was realized in trying to distinguish the "natural recruitment" from restocking (two origins : hatchery and lake dwelling spawners). The study indicates the efficiency of restocking with prefed fry (3-4 cm) on the juveniles (0+, 1+) population level in the tributary.
© ONEMA, 1990
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