摘要
根据投喂时间不同,将奥尼罗非鱼分为4个实验组(每组9尾),每组每天饱食投喂2次,投喂时间分别为8:00+14:00、14:00+20:00、20:00+2:00和2:00+8:00(依次用S1、S2、S3和S4表示),并使用Videomex-V影像运动监视系统全天监测奥尼罗非鱼的活动。结果显示,S1和S2组单位体重的摄食量显著低于S3和S4组,S1和S2组无显著差异,S3和S4组也无显著差异;投喂时间对全天游泳距离和游泳时间无显著影响,但对活动节律有明显的影响,S1和S2组的活动节律聚为一类,S3和S4组的活动节律聚为另一类。
A 6d trial with Videomex-V image motion monitor system was conducted to investigate the activity levels and rhythms in hybrid tilapia （Oreochromis niloticus ♀×O.aureus ♂） on different feeding times.The trial was carried out in a self-circulation system consisting of 36 organic glass tanks （28cm×24cm×20cm,water 10—12cm deep）.The monitor light period was from 8：00—19：00 and the dark period from 20：00—7：00,and two hours were spent to adjust image motion monitor system from 7：00 to 8：00 and 19：00 to 20：00.During the experiment,dissolved oxygen was maintained above 5.53mg/L,ammonia below 0.1025mg/L and temperature 25℃.
The fish were deprived of diet for one day at the beginning of the experiment,and then individual fish was randomly selected,batch-weighed and allocated into each tank.The 36 tanks were divided into 4 groups and each group contained 9 tanks selected randomly.The fish were fed twice a day and the feeding time was 8：00＋14：00,14：00＋20：00,20：00＋2：00 and 2：00＋8：00 individually （expressed by S1,S2,S3 and S4 individually）,and uneaten feed was collected 60 min after feeding.
The results showed that the diet weights per body weight were significantly lower in groups S1 and S2 than in groups S3 and S4,and S1 and S2 were similar,S3 and S4 being,too;Activity rhythms,not swimming distance and time per day,were affected significantly by feeding time,and S1 had more similar activity rhythms to S2,and S3 had more similar activity rhythms to S4.
出处
《水生生物学报》
CAS
CSCD
北大核心
2008年第1期38-41,共4页
Acta Hydrobiologica Sinica
基金
湖北省自然科学基金研究项目(2000J097)
淡水生态与生物技术国家重点实验室开放课题(2002FB12)
