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本文研究了真鲷 (Pagrosomusmajor)早期仔鱼的食性和食性转变。定量摄食实验研究发现 ,早期仔鱼的食性随其生长发育而发生明显的变化 ;真鲷虽为近海暖水性底层肉食性经济鱼类 ,但其前期仔鱼可摄食一些浮游藻类 (小球藻和螺旋藻 )。最大摄食率I[μg/(ind·h) ]随仔鱼的发育 ( 4～ 7日龄 )和食物种类而发生变化 ;对小球藻、螺旋藻、轮虫的最大I分别为 1.45～ 1.42、0 .49～ 1.3 9和 1.46～ 2 .51;早期仔鱼虽可摄食藻类 ,但仍以肉食性为主。在动物和植物混合食物 (轮虫 小球藻、轮虫 螺旋藻 )中 ,真鲷早期仔鱼存在食性转变 ,这对它的生存适应具有重要的生态意义。
This paper studied the feeding and feeding habits of early larvae of Pagrosomus major. Quantitative feeding experiments found that the early larvae ’s diet evolved significantly with their growth and development; Although the seabream is near the bottom of warm water carnivorous economic fish, but its early larvae can feed some of the phytoplankton (Chlorella and Spirulina ). The maximum ingestion rate I [μg / (ind · h)] varied with the development of larvae (from 4 to 7 days of age) and the type of food. The maximum I of Chlorella spirulina, Spirulina, rotifers were 1.45-1.42, 0 .49 ~ 1.3 9 and 1.46 ~ 2 .51; Although early larvae can take algae, but still predominantly carnivorous. In animal and plant mixed foods (rotiforms of rotifers, rotifers rotifers), there is a dietary change in the early larvae of the red sea bream, which is of great ecological significance for its survival adaptation.