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Availability of protein and energy from three protein sources in hybrid sturgeon Acipenser guldenstadti × A. bester
Author(s) -
Degani G
Publication year - 2002
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 - 10.1046/j.1365-2109.2002.00709.x
Subject(s) - fish meal , biology , soybean meal , feather meal , cottonseed meal , food science , meal , meat and bone meal , chromic oxide , zoology , fish <actinopterygii> , fishery , raw material , ecology
The apparent digestibility coefficient (ADC) of three diet ingredients serving as protein sources for adult sturgeon Acipenser guldenstadti × A. bester was studied using an inert marker in the feed and collecting the faeces by stripping. Each experimental diet contained a different protein source, fishmeal, soybean meal and poultry meal, making up 50% of the total, the other 50% being reference diet (28% fishmeal, 9% poultry meal, 24% soybean meal, 26% wheat flour, 8% poultry oil plus 0.5% vitamins, egg yolk, guar and chromic oxide). The digestibility of protein from fishmeal was 81.0%, from soybean meal 81.9% and from poultry meal 64.6%. Energy digestibility tests gave the following results: fishmeal 13.0 kJ g −1 ; soybean meal 12.1 kJ g −1 ; and poultry meal 10.2 kJ g −1 . The differences in the ADC of various protein and carbohydrate sources are discussed.