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作 者:郑珂珂[1] 方伟[1] 孔凡华[1] 常青[1] 梁萌青[1]
机构地区:[1]中国水产科学研究院黄海水产研究所,青岛266071
出 处:《渔业现代化》2010年第5期26-30,共5页Fishery Modernization
基 金:农业行业专项子课题"鲆鲽类安全高效专用配合饲料的研制与开发"(nyhyzx07-046);国家自然科学基金项目(30771660);国际科技合作项目(2008DFA31720);中国水产科学研究院黄海水产研究所基本科研业务费专项资金项目
摘 要:研究探讨了大菱鲆(Scophthatmus maximus)幼鱼的昼夜摄食节律以及不同投喂时间对大菱鲆摄食和生长的影响。试验在室内流水养殖系统中进行,水温为(14±0.2)℃,饲喂鲆鲽类商品饲料。采用两种方法进行试验:Ⅰ.分段式投喂方法将一昼夜分为8个时段,每天每个试验缸连续投喂8次,大菱鲆幼鱼表现为18 h出现一次摄食高峰;Ⅱ.一次饱食投喂法将一昼夜分为8个时段,每个时段作为1个处理,每天每个试验缸投喂1次,大菱鲆幼鱼摄食高峰出现在15:00、21:00、0:00和3:00,投喂时间显著影响了大菱鲆幼鱼的日摄食率、特定生长率和饲料效率,15:00、18:00和3:00投喂的大菱鲆幼鱼特定生长率和饲料效率显著高于6:00、9:00、12:00、21:00和0:00投喂的各组试验鱼(P<0.05)。结合生产实际,每天15:00—18:00时间段投喂大菱鲆幼鱼可显著提高其生长和饲料效率。The diurnal feeding rhythms and effects of feeding time on growth and feed utilization of turbot(Scophthalmus maximus L.) juvenile were studied.The 7 days growth experiments were conducted in an indoor flow-through system.There were 20 fish in each tank.A commercial diet(46% protein,10% lipid) for turbot was fed to fish.Two methods were used to studied the feeding rhythms.Ⅰ.Fish were continuously hand fed every three hours to apparent satiation.Feeding time were 6:00,9:00,12:00,15:00,18:00,21:00,0:00 and 3:00.Turbot juvenile showed a feeding rhythm with a single peak occurring once every 18 hours.Ⅱ.In this trial,fish were hand fed to apparent satiation once per day.Feeding time were 6:00,9:00,12:00,15:00,18:00,21:00,0:00 and 3:00.Turbot juvenile showed a diel feeding rhythm with the peak at 15:00,21:00 and 3:00.Growth and feed utilization of turbot were significantly affected by feeding time.Growth and feed efficiency of fish fed at feeding time 15:00,18:00 and 3:00 were significantly higher than those fed at feeding time 0:00,6:00,9:00,12:00 and 21:00(P0.05).To sum up.Optimal feeding time in turbot culture were during 15:00-18:00.
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