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Growth, feed efficiency and body composition of juvenile cobia ( Rachycentron canadum Linnaeus, 1766) fed increasing dietary levels of shrimp protein hydrolysate
Author(s) -
CostaBomfim Caroli,
Silva Victor A,
Bezerra Ranilson de S,
Druzian Janice I,
Cavalli Ronaldo O
Publication year - 2017
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/are.13013
Subject(s) - biology , feed conversion ratio , shrimp , zoology , juvenile , fish meal , hydrolysate , protein efficiency ratio , meal , body weight , composition (language) , weight gain , fishery , fish <actinopterygii> , food science , biochemistry , ecology , endocrinology , linguistics , philosophy , hydrolysis
A shrimp protein hydrolysate ( SPH ) containing 894.2 g kg −1 crude protein ( CP ) and 54.3 g kg −1 total lipids was tested as a partial replacement for fish meal ( FM ) in diets of juvenile cobia. The effects of increasing dietary levels of SPH on the survival, weight gain ( WG ), specific growth rate ( SGR ), feed conversion ratio ( FCR ), nitrogen retention efficiency ( NRE ) and daily feed intake ( DFI ) of cobia with initial body weight of 11.9 g were evaluated. Four isoproteic (from 431.1 to 439.7 g kg −1 ) and isoenergetic (20 825–21 347 MJ kg −1 ) diets were formulated to contain 0 (Control), 120, 240 or 360 g kg −1 of dietary CP derived from SPH . Survival, WG , SGR , FCR , NRE and DFI ranged from 90 to 100%, 40.2–56.5 g, 4.7–6.1% day −1 , 1.04–1.54, 26.3–44.0% and 4.7–6.0% fish −1 day −1 respectively. Survival and DFI were not affected by the dietary treatments. On the other hand, fish fed the control diet and the one containing 120 g kg −1 SPH had higher WG , SGR and FCR . Nitrogen retention efficiency was significantly higher for fish fed diets 0 and 120. It is concluded that up to 120 g kg −1 of SPH in cobia diets can be used with no significant effects on feed utilization and fish performance.