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Seasonal variations in the energy density of fishes in the North Sea
Author(s) -
Pedersen J.,
Hislop J. R. G.
Publication year - 2001
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.1095-8649.2001.tb00137.x
Subject(s) - haddock , clupea , biology , herring , sprat , whiting , fishery , clupeidae , gadidae , fish <actinopterygii> , atlantic cod , gadus
The energy density ( E D , kJ g ‐1 wet mass) of saithe Pollachius virens , haddock Melanogrammus aeglefinus , whiting Merlangius merlangus , Norway pout Trisopterus esmarki , herring Clupea harengus , sprat Sprattus sprattus , sandeel Ammodytes marinus and pearlsides Maurolicus Muelleri , from the North Sea, increased with total length, L T . However, there was not always a significant ( P> 0·05) linear relationship between L T and E D . Seasonal differences in E D were obvious in mature fish, while geographical differences were insignificant. For all species there was a highly significant correlation ( P< 0·0001) between the percent dry mass of the fish ( D S) and E D . A general relationship was established for gadoids and sandeel E D =–3·1492+0·3459 D S and herring E D =–4·6395+0·4170 D S . Thus seasonal and size‐specific data on E D needed for bioenergetics and gastric evacuation models can be determined simply from D S , which is considerably less costly and time consuming than calorimetry or proximate analysis.