Open AccessApparent digestibility of A sian carp‐ and common carp‐derived fish meals in feeds for hybrid striped bass M orone saxatilis ♀ × M . chrysops ♂ and rainbow trout O ncorhynchus mykiss
Author(s) -
Bowzer J.,
Trushenski J.,
Rawles S.,
Gaylord T.G.,
Barrows F.T.
Publication year - 2015
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.12136
Subject(s) - biology , menhaden , rainbow trout , fish meal , bighead carp , bass (fish) , common carp , fishery , ingredient , carp , morone , silver carp , food science , catfish , zoology , meal , cyprinus , fish <actinopterygii>
Apparent digestibility coefficients ( ADC s) of nutrients (crude protein, amino acids, crude lipid, fatty acids, and minerals) were determined for fish meals derived from menhaden, Asian carp (combination of silver and bighead carps), and common carp in feeds for hybrid striped bass and rainbow trout. Extruded test diets were formulated to contain a 70 : 30 mixture of reference diet and test ingredient with yttrium oxide (1 g kg −1 ) serving as the inert marker. Diets were randomly assigned to triplicate tanks and fish were fed once per day at 2% body weight. Fecal samples were collected by manual stripping. The ADC s were calculated according to standard procedures. The composition and digestibility of Asian carp and common carp meals was broadly similar to menhaden meal. Protein digestibility ranged from 86.5% (Asian carp meal) to 93.1% (common carp meal). Lipid was highly digestible with ADC s >100% for all ingredients. Although the Asian carp meal was less digestible than the other two fish meals, it was still a highly digestible ingredient. Our data suggest that fish meals derived from Asian or common carp would be valuable feedstuffs in diets for hybrid striped bass, rainbow trout, and possibly other cultured fishes.