The study was conducted to demonstrate the effects of dietary protein and water temperature on growth and flesh quality of Songpu mirror carp （Cyprinus carpio） at an initial weight （165.24±5.08） g. Practical ...The study was conducted to demonstrate the effects of dietary protein and water temperature on growth and flesh quality of Songpu mirror carp （Cyprinus carpio） at an initial weight （165.24±5.08） g. Practical diets were formulated to contain five protein levels （29.12%, 31.46%, 34.49%, 38.17%, and 40.13%）, and each diet was randomly assigned triplicate groups of 15 fishes at three temperatures （18℃, 22℃, and 26℃） in the recirculation system. Fishes were fed twice daily to apparent satiation for 56 days. Results indicated that fishes had higher weight gain rate at 22℃ and 26℃ than that at 18℃ （P〈0.05）, but there were no significant differences between 22℃ and 26℃ （P〉0.05）. Based on the weight gain rate, dietary protein level 29.12% could meet the requirement of the body at 18℃, 22℃, or 26℃. Crude protein, crude lipid, moisture and ash of muscle had no significant differences among those treatments （P〉0.05）. pH （after 24 h） of muscle was the highest at 18℃ and the lowest at 22℃ （P〈0.05）, but no differences were observed among different protein level groups at each temperature （P〉0.05）. No significant differences on shear force, water holding capacity, collagen, glycogen and lactate among all the treatments were found （P〉0.05）. It was concluded that when C. carpio fed to apparent satiation, the growth mainly depended upon temperature. Dietary protein could not significantly affect flesh quality, but temperature significantly affected pH of muscles. A dietary protein level 29.12% could meet the requirement of the body at 18℃, 22℃, or 26℃.展开更多
松浦红镜鲤(Cyprinus carpio Songpu red mirror)是中国水产科学研究院黑龙江水产研究所选育的鲤新品种。鲤在遵义地区繁殖季节为4月~5月,为实现商品鱼提早上市,在贵州省遵义市播州区鱼类繁育中心枫香基地,选择25尾成熟雌鱼和34尾成熟...松浦红镜鲤(Cyprinus carpio Songpu red mirror)是中国水产科学研究院黑龙江水产研究所选育的鲤新品种。鲤在遵义地区繁殖季节为4月~5月,为实现商品鱼提早上市,在贵州省遵义市播州区鱼类繁育中心枫香基地,选择25尾成熟雌鱼和34尾成熟雄鱼松浦红镜鲤,开展早繁及鱼苗培育试验。通过亲鱼专池强化培育、温泉热水调节水温,使亲鱼性腺提早发育。注射催产剂,获得受精卵约305万粒,受精率为86.5%。经过15d的饲养,获得水花200万尾,孵化率为75.76%;培育乌仔134.58万尾,成活率67.29%;可将人工繁苗时间提早40d左右。展开更多
基金Supported by the Special Fund for Agro-scientific Research in Public Interest(CARS-46)the National Key Technology Research and Development Program in 12th Five-year Plan of China(2012BAD25B10)
文摘The study was conducted to demonstrate the effects of dietary protein and water temperature on growth and flesh quality of Songpu mirror carp （Cyprinus carpio） at an initial weight （165.24±5.08） g. Practical diets were formulated to contain five protein levels （29.12%, 31.46%, 34.49%, 38.17%, and 40.13%）, and each diet was randomly assigned triplicate groups of 15 fishes at three temperatures （18℃, 22℃, and 26℃） in the recirculation system. Fishes were fed twice daily to apparent satiation for 56 days. Results indicated that fishes had higher weight gain rate at 22℃ and 26℃ than that at 18℃ （P〈0.05）, but there were no significant differences between 22℃ and 26℃ （P〉0.05）. Based on the weight gain rate, dietary protein level 29.12% could meet the requirement of the body at 18℃, 22℃, or 26℃. Crude protein, crude lipid, moisture and ash of muscle had no significant differences among those treatments （P〉0.05）. pH （after 24 h） of muscle was the highest at 18℃ and the lowest at 22℃ （P〈0.05）, but no differences were observed among different protein level groups at each temperature （P〉0.05）. No significant differences on shear force, water holding capacity, collagen, glycogen and lactate among all the treatments were found （P〉0.05）. It was concluded that when C. carpio fed to apparent satiation, the growth mainly depended upon temperature. Dietary protein could not significantly affect flesh quality, but temperature significantly affected pH of muscles. A dietary protein level 29.12% could meet the requirement of the body at 18℃, 22℃, or 26℃.
文摘松浦红镜鲤(Cyprinus carpio Songpu red mirror)是中国水产科学研究院黑龙江水产研究所选育的鲤新品种。鲤在遵义地区繁殖季节为4月~5月,为实现商品鱼提早上市,在贵州省遵义市播州区鱼类繁育中心枫香基地,选择25尾成熟雌鱼和34尾成熟雄鱼松浦红镜鲤,开展早繁及鱼苗培育试验。通过亲鱼专池强化培育、温泉热水调节水温,使亲鱼性腺提早发育。注射催产剂,获得受精卵约305万粒,受精率为86.5%。经过15d的饲养,获得水花200万尾,孵化率为75.76%;培育乌仔134.58万尾,成活率67.29%;可将人工繁苗时间提早40d左右。
