周期性断食对皱纹盘鲍生长、摄食、排粪和血细胞组成的影响

对壳长为65mm的皱纹盘鲍进行投喂2d、饥饿1～4d的周期性断食处理,连续投喂组作为对照。皱纹盘鲍的摄食、生长、排粪和血细胞组成的研究结果表明,当投喂2d,饥饿天数少于2d时,皱纹盘鲍的生长没有显著差异(P>0.05),饥饿天数多于3d,鲍体重开始下降;摄食率呈随解饿时间增加呈升高趋势,但实验组间无显著差异(P>0.05);排粪率与粪便中的有机物含量随饥饿时间增长而降低,其中,各处理阶段间的差异显著(P<0.05)。血细胞中颗粒细胞的比例在饥饿少于2d的实验组间无差异,但显著高于投喂2d、饥饿3d的实验组与投喂2d、饥饿4d的实验组(P<0.05)。

Effect of periodic starvation on growth, feeding, defecation and granulocyte of Pacific abalone Haliotis discus hannai Ino

Aquaculture of abalone was limited in northern China by the lack of fresh food in summer. For a new feeding method, the Pacific abalone Haliotis discus hannai Ino at shell length of 65mm were treated with periodic starvation, i.e. feeding for 2d, then starving for 1～4d, with continuous feeding treatment as control. Results of growth, feeding, defecation and granulocyte suggested that there was no significant difference in growth when starvation was less than 2d (P>0.05), while body weight dropped in other groups(more than 3d starvation). Food intake rate increased as starvation lasted, but there was no significant difference between each group (P>0.05). Fecal production rate and organic matter in feces decreased with prolonged starvation, and it was significantly different during each treatment stage (P<0.05); Ratio of granulocyte showed no difference in treatments of starvation less than 2d, and significantly higher for group of starvation less than 2d than groups of f2s3 and f2s4 (P<0.05).