Plasma prolactin levels during smolting in Atlantic salmon, Salmo salar

To obtain more information on a possible involvement of prolactin during parr-smolt transformation of Atlantic salmon, Salmo salar, parr and smolt populations of the same age were sampled from February to June. A clear separation of the two populations was observed according to their size and gill (...

Full description

Bibliographic Details
Published in:Aquaculture
Main Authors: Prunet, Patrick, Boeuf, Gilles
Format: Article in Journal/Newspaper
Language:English
Published: 1989
Subjects:
fish;atlantic salmon;enzymatic activity;plasma prolactin
poisson
salmonidae
saumon de l'atlantique
salmo salar
smolt
branchie
adaptation
smoltification
récepteur prolactine
photopériode
Atlantic salmon
Salmo salar
Online Access:http://prodinra.inra.fr/ft/8D43E9E7-82A6-45FE-A204-ADFBFA246C3F
http://prodinra.inra.fr/record/410653
https://doi.org/10.1016/0044-8486(89)90416-X
Description
Summary:To obtain more information on a possible involvement of prolactin during parr-smolt transformation of Atlantic salmon, Salmo salar, parr and smolt populations of the same age were sampled from February to June. A clear separation of the two populations was observed according to their size and gill (Na+ K+)-ATPase activity. Comparison of plasma prolactin (PRL) levels between these two populations indicated a significant decrease from May to early July in smolts whereas, in parr, a steady increase was observed. Diel variations in plasma PRL levels at three different dates were also studied in fish undergoing smolting. Sampling fish over a 24-h period on 11 March, 5 May and 15 July did not indicate the presence of a diel rhythm in PRL release. These data support the hypothesis that the PRL decrease is associated with smolting in Atlantic salmon and that such a decrease cannot be explained by a change in diel rhythm of plasma PRL levels.

Similar Items