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长崎县水产试验场岛原分场自1980年开始进行鲈鱼种苗生产试验,后来发现所生产的稚鱼在饲育过程中常有一部分鱼体会脊柱弯曲为“V”字型,即所谓的脊柱前弯症。为了解其原因,作者于1982年先后作了3次实验。结果表明,鲈鱼与真鲷同样是在出现气管的仔鱼期,吸入水表面空气的机能受到阻碍,产生了鳔无气体个体(以下简称鳔闭腔个体),随成长这其中的一部分转为脊柱前弯症。实验概要如下。
Nagasaki Aquatic Test Island Shimabara substations since 1980 began bass seedling production test, and later found that the production of juveniles in the breeding process often part of the fish bent spine will be “V” shape, the so-called anterior spinal Crohn’s disease. In order to understand the reason, the author made three experiments successively in 1982. The results showed that sea bass and sea bream were also in the stage of tracheal larvae, and the function of inhaling water surface air was impeded, resulting in the formation of gas-free individuals (hereinafter referred to as 鳔 closed individuals), some of which were transferred to the anterior spinal column Crohn’s disease. The experiment is summarized as follows.