不同饵料对稀有鮈鲫仔稚鱼生长、消化道及消化酶的影响  

THE EFFECTS OF DIFFERENT BAITS ON THE GROWTH AND ACTIVITIES OF THE DIGESTIVE TRACT AND ENZYME OF THE LARVAE AND JUVENILE GOBIOCYPRIS RARUS

作　　者：赵月月 赵健蓉 胡佐灿 杨洋 詹素平 刘小红 王志坚 

机构地区：[1]西南大学生命科学学院,淡水鱼类资源与生殖发育教育部重点实验室,水产科学重庆市市级重点实验室,重庆400715

出　　处：《水生生物学报》2018年第1期114-122,共9页Acta Hydrobiologica Sinica

基　　金：重庆市教委项目(CY160219)资助~~

摘　　要：为了筛选稀有鮈鲫(Gobiocypris rarus)仔稚鱼期合适的饵料,将初孵仔鱼随机分为3个组:活饵组、饲料组、转食组,每组3个平行,均从3 dah(day after hatching)开始投喂相应饵料,在10、15、20、25、30、35 dah时统计生长指标和存活率,并进行35 dah仔稚鱼消化道组织学及消化酶活性研究。结果显示:(1)35 dah时,活饵组存活率最高;(2)从15 dah开始,活饵组表现出最好的生长性能,并维持这种趋势;(3)活饵组的消化道各部肌层厚度、黏液细胞数目均最高,提示该组仔稚鱼消化道发育状态较好,并具有较优的消化吸收能力;(4)转食组胰蛋白酶活性显著高于活饵组和饲料组。研究结果提示:相对于饲料和转食,一直投喂活饵更有利于稀有鮈鲫仔稚鱼的生长和发育。建议在标准化养殖过程中,对仔稚鱼期的稀有鮈鲫采取活饵投喂的方式。Baits is an important factor for fish growth and development. In order to find a proper bait for the larvae and juvenile Gobiocypris rarus, we divided newly hatched larvae into three groups randomly： live bait group, artificial diet group and food conversion group. Each group has three parallel samples. The fish of each group were fed since 3 dah（day after hatching） with the three different diets mentioned before, and the growth and survival rates of the larvae and juveniles were measured on 10, 15, 20, 25, 30, 35 dah. We also studied the structure and the function of the digestive tract by histological methods, and measured the digestive enzyme activities on 35 dah. Results showed that：（1） the live bait group had the highest survival rate on 35 dah;（2） from 15 dah, fish in the live bait group showed the best growing performance, and kept that trend until 35 dah;（3） muscle layer thickness and mucous cell numbers of the entire digestive tract in the live bait group were the highest, which suggested a more developed digestive tract and thus a better capacity in digestion and absorption;（4） the maximum activity of trypsase was observed in the larvae and juvenile group fed with baits. All those results mentioned above indicated that： compared with artificial diet and food conversion, live baits were the best choice for the growth and development of larvae and juvenile Gobiocypris rarus. We suggested that live baits should be taken to feed larvae and juvenile Gobiocypris rarus in the process of standardized cultivation.

关 键 词：稀有鮈鲫 仔稚鱼 投喂方式 生长发育 

分 类 号：S965.1[农业科学—水产养殖]