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The effects of food consumption rate, body size and temperature on net food conversion efficiency in saithe and whiting
Author(s) -
Andersen N. G.,
RiisVestergaard J.
Publication year - 2003
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 - 10.1046/j.1095-8649.2003.00030.x
Subject(s) - whiting , biology , bioenergetics , food science , net energy , zoology , feed conversion ratio , fishery , body weight , biochemistry , endocrinology , fish <actinopterygii> , mitochondrion
Net food conversion efficiency κ was estimated from growth experiments on saithe Pollachius virens and whiting Merlangius merlangus that were fed natural prey at a range of ration levels including satiation rations. The conversion efficiency, which specifies the net energy fraction of ingested energy C , was described appropriately by a simple power function of food consumption rate as κ = 0·272 C 0·18 and κ = 0·426 C 0·11 for saithe and whiting. This functional relationship was supported by the patterns of accretion of lipids and proteins in saithe. No significant effects of temperature and body size on κ was, however, demonstrated in this study except for the indirect influence using feeding levels (rations expressed relatively to satiation rations) in bioenergetics models.