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Growth performance of E uropean whitefish [ C oregonus lavaretus ( L .)] under a constant light and temperature regime
Author(s) -
Siikavuopio Sten I.,
Knudsen Rune,
Amundsen PerArne,
Sæther Bjørn Steinar
Publication year - 2012
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2011.02963.x
Subject(s) - biology , coregonus lavaretus , fish <actinopterygii> , zoology , growth rate , aquaculture , constant (computer programming) , feed conversion ratio , fishery , ecology , mathematics , body weight , geometry , endocrinology , computer science , programming language
Growth, feed intake and maturation were monitored in a fast‐growing benthivore morph of E uropean whitefish [ C oregonus lavaretus ( L .)] held under constant light ( LD 24:0) and temperature conditions (10°C) for 415 days. Their growth was best described by polynomial regression model and no indication of seasonal patterns (e.g. winter depression) in growth rates was found. There was no significant difference in food conversion ratio ( FCR ) between periods during the experiment and the FCR was favourable (0.84). Furthermore, there were no differences in growth between males and females. None of the fish became sexually mature by the time the experiment was terminated, although they had reached a mean size of about 444 g. The E uropean whitefish seems to be a promising aquaculture species as the growth rate was relatively high with a remarkable homogenous growth performance between individual fish within each experimental unit, a relatively favourable FCR , a low degree of agonistic behaviour and negligible growth depression due to internal biological rhythms or gonad maturation. These results were obtained at relatively low temperatures that should be beneficial for sustainable cost‐effective farming conditions in cold climate condition in northern S candinavia.