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本文研究了不同盐度(30‰、20‰、10‰和<10‰)对幼鲻的生长、摄食和食物转换率的影响问题。经试验发现在这四种试验盐度条件下,每天摄取食物的情况是变化无常的。饵料过多时摄食量取决于盐度。给饵量为鱼体重的8％或更多时,生长率没有明显的区别,最大的生长率出现在盐度为20‰时。在10‰盐度条件下超量给饵的转换率百分数最高。当“口粮”固定不变时,转换率的百分数随盐度的增加而下降。
In this paper, the effects of different salinities (30 ‰, 20 ‰, 10 ‰ and <10 ‰) on the growth, feeding and food conversion rate of juvenile slugs were studied. It has been found experimentally that the daily intake of food under these four test salinity conditions is volatile. Food intake depends on salinity when there is too much food. There was no significant difference in growth rate when the bait was 8% or more of the body weight of the fish, and the maximum growth rate appeared when the salinity was 20 ‰. The rate of over-bait conversion was highest at 10 ‰ salinity. When “rations” are fixed, the percentage of conversion decreases as salinity increases.