TY - JOUR
T1 - Effects of dietary canola meal on growth performance, digestion and metabolism of Japanese seabass, Lateolabrax japonicus
AU - Cheng, Zhenyan
AU - Ai, Qinghui
AU - Mai, Kangsen
AU - Xu, Wei
AU - Ma, Hongming
AU - Li, Yan
AU - Zhang, Jiaming
N1 - Funding Information:
This study was financially supported by the National Key Technologies R&D Program for the 11th Five-year Plan of China (Grant No.: 2006BAD03B03 ), Program for New Century Excellent Talents in University ( NCET-07-0776 ) and Tongwei Group, Sichuan, China . The authors wish to thank Fishery Institute of Ningbo for supplying the rearing facility and Dr. Delbert M. Gatlin III for revising this manuscript. We also thank Ming Chun Ren for his help in preparing the diets and the rearing cages, and You Qing Miao for his help in assaying anti-factors content in diets.
PY - 2010/7
Y1 - 2010/7
N2 - A 10-week feeding trial in seawater floating cages (1.5×1.5×2.0m) was conducted to investigate the effects of dietary canola meal (CM) levels on growth, survival, digestion and selected immune parameters of Japanese seabass (initial average weight 8.3±0.15g). Six isonitrogenous (crude protein 43%) and isoenergetic (20kJg-1) practical diets were formulated by replacing 0 (the control), 10, 20, 30, 40, and 50% of protein from fish meal with CM. Each diet was randomly fed to triplicate groups of fish, and each cage was stocked with 20 fish. Fish were fed twice daily (06:30 and 16:30) to apparent satiation. The results showed that with increasing dietary CM levels, the survival, specific growth rate (SGR) and feed efficiency (FE) decreased. The survival was significantly lower compared to the control group (P<0.05) with a 40% substitution level. Fish fed the diet with 20% or more protein from CM had significantly lower SGR than the control group (P<0.05), but there was no significant difference in FE at this level (P>0.05). The activities of digestive enzymes and apparent digestibility coefficients of dry matter, protein, lipid and phosphorus significantly decreased with increasing dietary CM level. A similar trend was observed in the immune response where lysozyme activity significantly decreased compared with the control group when the substitution level was more than 20%. Results of the present study indicated that protein from CM could substitute less than 20% for fish meal protein without influencing the growth of Japanese seabass. The higher substitution levels of CM induced negative influences on growth, survival and serum lysozyme of Japanese seabass.
AB - A 10-week feeding trial in seawater floating cages (1.5×1.5×2.0m) was conducted to investigate the effects of dietary canola meal (CM) levels on growth, survival, digestion and selected immune parameters of Japanese seabass (initial average weight 8.3±0.15g). Six isonitrogenous (crude protein 43%) and isoenergetic (20kJg-1) practical diets were formulated by replacing 0 (the control), 10, 20, 30, 40, and 50% of protein from fish meal with CM. Each diet was randomly fed to triplicate groups of fish, and each cage was stocked with 20 fish. Fish were fed twice daily (06:30 and 16:30) to apparent satiation. The results showed that with increasing dietary CM levels, the survival, specific growth rate (SGR) and feed efficiency (FE) decreased. The survival was significantly lower compared to the control group (P<0.05) with a 40% substitution level. Fish fed the diet with 20% or more protein from CM had significantly lower SGR than the control group (P<0.05), but there was no significant difference in FE at this level (P>0.05). The activities of digestive enzymes and apparent digestibility coefficients of dry matter, protein, lipid and phosphorus significantly decreased with increasing dietary CM level. A similar trend was observed in the immune response where lysozyme activity significantly decreased compared with the control group when the substitution level was more than 20%. Results of the present study indicated that protein from CM could substitute less than 20% for fish meal protein without influencing the growth of Japanese seabass. The higher substitution levels of CM induced negative influences on growth, survival and serum lysozyme of Japanese seabass.
KW - Anti-nutrients
KW - Canola meal
KW - Digestion
KW - Growth
KW - Japanese seabass
KW - Metabolism
UR - http://www.scopus.com/inward/record.url?scp=77955556724&partnerID=8YFLogxK
U2 - 10.1016/j.aquaculture.2010.03.031
DO - 10.1016/j.aquaculture.2010.03.031
M3 - Article
AN - SCOPUS:77955556724
VL - 305
SP - 102
EP - 108
JO - Aquaculture
JF - Aquaculture
SN - 0044-8486
IS - 1-4
ER -