February 15-18, 2009 Washington State Convention Center Seattle ...

EFFECTS OF TWO DIETARY LIPID LEVELS ON GROWTH PERFORMANCE AND BODY
COMPOSITION OF PRE-ADULT HATCHERY REARED AND WILD-CAUGHT BLACK SEA
BASS Centropristis striata
Md. Shah Alam, Amanda R. Myers*, Wade O. Watanabe, David Berlinsky, Abigail B. Walker, Katherine B. Sullivan
and Walker D. Wright-Moore
University of North Carolina Wilmington
Center for Marine Science
601, S. College Road
Wilmington, NC, 28403-5927 USA
alamm@uncw.edu
Two isonitrogenous (approximately 50% crude protein) formulated practical diets having different lipid levels (12% and 18%)
were fed to pre-adult black sea bass to test their effects on growth performance and body composition of hatchery reared and
wild-caught fish reared in pilot-scale recirculating sea water systems. In experiment 1, hatchery reared (approximately 395 g
initial weight) were fed the respective diets for about 6.5 months in triplicate recirculating tanks (2.7 m 3 , 50 fish/tank) at the
Center for Marine Science, University of North Carolina Wilmington (UNCW). In a separate experiment 2, wild-caught black
sea bass (approximately 177 g initial weight) were fed these same diets for about 4 months in triplicate recirculating tanks (4.8
m 3 , 10 fish/tank) at the Aquaculture Research Center, University of New Hampshire (UNH). In both experiments, fish were
fed two times a day to apparent satiation. At the end of the feeding trial, proximate composition for whole body, muscle, viscera
and liver tissue were analyzed.
In experiment 1, after 82 days of feeding, weight gain (g) and lipid content of whole body, muscle, liver and viscera for hatchery-reared
fish fed 18% lipid appeared to be higher than fish fed 12% but no significant differences were observed. After 193
days of feeding, hatchery reared fish fed 18% lipid showed significantly higher (P