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Differences in performance, flesh composition and water output quality in relation to density and feeding levels in rainbow trout, Oncorhynchus mykiss (Walbaum), farming
Author(s) -
ZOCCARATO I.,
BENATTI G.,
BIANCHINI M. L.,
BOCCIG M.,
CONTI A.,
NAPOLITANO R.,
PALMEGIANO G. B.
Publication year - 1994
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.1365-2109.1994.tb00728.x
Subject(s) - rainbow trout , biology , flesh , zoology , feed conversion ratio , composition (language) , dry matter , fishery , aquaculture , fish farming , biomass (ecology) , food science , fish <actinopterygii> , ecology , body weight , endocrinology , linguistics , philosophy
. The aim of this research was lo evaluate the effect of density and feeding level (initially 8 or 16kg/m 3 and 1·3% or 2% of present biomass respectively) on productive traits, meat composition and water quality output in farmed rainbow trout, Oncorhynchus mykiss (Walbaum). Individual fish growth shows significant differences in relation to density and feeding level; feed conversion rate is positively Influenced by the lower feeding level and low rearing density. At low density, specific growth rate, protein efficiency ratio and coefficient of variation of individual final weights are more favourable than at high density. Dry matter and lipid composition of meat are positively affected by feeding level; whereas no differences are recorded on the amino acid and fatty acid profiles. Water quality shows differences due to density (NO 3 and NH 4 + ) and feeding level (NO 2 , NH 4 + and P).