Measurements of gill (Na+ K+)-ATPase activity and plasma thyroid hormones during smoltification in Atlantic salmon (Salmo salar L.)

Gill (Na+_K+)-ATPase activity, triiodothyronine (T3) and thyroxine (T4) circulating blood plasma levels were monitored in 1983 on yearling Atlantic salmon reared in a hatchery in Brittany. The level of enzyme activity increased between February and April to reach a high plateau between mid-April and...

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Bibliographic Details
Published in:Aquaculture
Main Authors: Boeuf, Gilles, Prunet, Patrick
Format: Article in Journal/Newspaper
Language:English
Published: 1985
Subjects:
fish;gill;smoltification
poisson
salmonidae
saumon de l'atlantique
salmo salar
branchie
smoltification
activité enzymatique
hormone thyroïdienne
Atlantic salmon
Salmo salar
Online Access:http://prodinra.inra.fr/ft/9955ECC9-CC06-4A2F-816B-182D40A0C180
http://prodinra.inra.fr/record/402636
https://doi.org/10.1016/0044-8486(85)90262-5
Description
Summary:Gill (Na+_K+)-ATPase activity, triiodothyronine (T3) and thyroxine (T4) circulating blood plasma levels were monitored in 1983 on yearling Atlantic salmon reared in a hatchery in Brittany. The level of enzyme activity increased between February and April to reach a high plateau between mid-April and mid-May. The same fish presented an acute surge of T4 in mid-April and two small increases of T3 in February and May. The gill enzyme activity and the T4 blood plasma level follow a similar pattern, reaching high values at the same moment. The T4 peak occurs at the new moon and does not seem to be correlated with an increase of temperature. Possible relationships between blood plasma T3, T4 and gill (Na+_K+)-ATPase activity are discussed.

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