Premium
Influence of body weight and temperature on growth rates of Arctic charr, Salvelinus alpinus (L.)
Author(s) -
Jobling M.
Publication year - 1983
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1983.tb04767.x
Subject(s) - salvelinus , biology , arctic , growth rate , fish <actinopterygii> , zoology , body weight , growth model , ecology , salmonidae , fishery , trout , rainbow trout , geometry , mathematics , economics , microeconomics , endocrinology
When reared for a period of 6 months at a temperature of 10°C Arctic charr, Salvelinus alpinus , increased in weight from 18 g to approximately 135 g. Specific growth rates decreased as the fish increased in size and the relationship between size and growth rate could be described by the equation:where G w is specific growth rate and W is fish weight in grams. Temperature effects upon growth were examined using previously published data. Below the optimum growth temperature, the growth rate of a fish of given size could be predicted using the equation:where T is the rearing temperature. Rates of growth of Arctic charr were as high as those reported for other salmonid species reared under similar conditions. Preliminary results suggested that growth rates of charr may be lower in salt water than in fresh water.