To investigate the effect of feed protein levels on growth and feed utilization of juvenile Lateolabraxjaponicus, fish meal was used as the major protein source to prepare five isoenergetic experimental feeds containi...To investigate the effect of feed protein levels on growth and feed utilization of juvenile Lateolabraxjaponicus, fish meal was used as the major protein source to prepare five isoenergetic experimental feeds containing 35.0%, 37.5%, 40.0%, 42.5% and 45.0% protein, respectively. Juvenile L. japonicus with the initial average body weight of （84.81 ±0.92） g were fed for 75 d to determine the best protein level for juvenile L. japonicus. The results showed that the relative weight gain rate, specific growth rate and feed conversion ratio in the group containing 39.85% protein were extremely higher than those in the groups containing 34.76% and 37.54% protein （ P 〈 0.01 ）, but had no significant difference with that in the group containing 42.34% protein （ P 〉0.05）. Protein efficiency ratio in the group containing 39.85% protein was also significantly higher than those in the groups containing 34.76%, 42.34% and 45.03% protein （ P 〈0.05）, while had no significant difference with that in the group containing 37.54% protein（ P 〉0.05）. In this experiment, based on quadratic model regression analysis of specific growth rate and protein efficiency ratio, growth performance and feed utilization rate of L. japonicus was the best when the protein content of feed was from 38.87% to 41.50%.展开更多
This study was carried out to study the effect of adding different levels of date palm seed （Phoentix dactyliJProus） powder in the diet of common carp （Cyprinus carpio） at fish laboratory of Animal Production Depa...This study was carried out to study the effect of adding different levels of date palm seed （Phoentix dactyliJProus） powder in the diet of common carp （Cyprinus carpio） at fish laboratory of Animal Production Department, College of Agricultural Sciences, Sulaimani University, Sulaimani, Iraq. The actual experimental feeding trials were conducted for 70 d and the adaptation period for 21 d. A total of 81 common carp fingerlings weighted 62 ± 2 g were divided into three experimental groups. The control treatment T1 was with 0 g date palm seed, T2 with 2.5 g date palm seed per kg diet and T3 with 5 g date palm seed per kg diet. Each treatment was in three replicates in which three common carp fingerlings were stocked in each aquarium which fed the experimental diets twice daily. The results indicated that weight gain （WG） and specific growth rate （SGR） in the third treatment （T3） group were significantly higher than those of fish fed control diets. T2 consumed more diet than other treatments with 306.940 g with higher feed conversion ratio （FCR）; T3 was higher significantly in food efficiency. No significant （P 〈 0.05） differences obtained from consumed protein while the protein efficiency ratio was significantly higher in T3 with 319.323. Control was higher significantly in flesh weight without viscera with the third treatment; in flesh weight without head and viscera each the control and the second treatment was significantly higher than the third treatment. As a conclusion, the date palm seeds powder have a positive effect on growth performance of common carp.展开更多
基金Supported by Science and Technology Spark Program of Fujian Province(2011S0015)
文摘To investigate the effect of feed protein levels on growth and feed utilization of juvenile Lateolabraxjaponicus, fish meal was used as the major protein source to prepare five isoenergetic experimental feeds containing 35.0%, 37.5%, 40.0%, 42.5% and 45.0% protein, respectively. Juvenile L. japonicus with the initial average body weight of （84.81 ±0.92） g were fed for 75 d to determine the best protein level for juvenile L. japonicus. The results showed that the relative weight gain rate, specific growth rate and feed conversion ratio in the group containing 39.85% protein were extremely higher than those in the groups containing 34.76% and 37.54% protein （ P 〈 0.01 ）, but had no significant difference with that in the group containing 42.34% protein （ P 〉0.05）. Protein efficiency ratio in the group containing 39.85% protein was also significantly higher than those in the groups containing 34.76%, 42.34% and 45.03% protein （ P 〈0.05）, while had no significant difference with that in the group containing 37.54% protein（ P 〉0.05）. In this experiment, based on quadratic model regression analysis of specific growth rate and protein efficiency ratio, growth performance and feed utilization rate of L. japonicus was the best when the protein content of feed was from 38.87% to 41.50%.
文摘This study was carried out to study the effect of adding different levels of date palm seed （Phoentix dactyliJProus） powder in the diet of common carp （Cyprinus carpio） at fish laboratory of Animal Production Department, College of Agricultural Sciences, Sulaimani University, Sulaimani, Iraq. The actual experimental feeding trials were conducted for 70 d and the adaptation period for 21 d. A total of 81 common carp fingerlings weighted 62 ± 2 g were divided into three experimental groups. The control treatment T1 was with 0 g date palm seed, T2 with 2.5 g date palm seed per kg diet and T3 with 5 g date palm seed per kg diet. Each treatment was in three replicates in which three common carp fingerlings were stocked in each aquarium which fed the experimental diets twice daily. The results indicated that weight gain （WG） and specific growth rate （SGR） in the third treatment （T3） group were significantly higher than those of fish fed control diets. T2 consumed more diet than other treatments with 306.940 g with higher feed conversion ratio （FCR）; T3 was higher significantly in food efficiency. No significant （P 〈 0.05） differences obtained from consumed protein while the protein efficiency ratio was significantly higher in T3 with 319.323. Control was higher significantly in flesh weight without viscera with the third treatment; in flesh weight without head and viscera each the control and the second treatment was significantly higher than the third treatment. As a conclusion, the date palm seeds powder have a positive effect on growth performance of common carp.
