Relationship between Uninflated Swim Bladders and Lordotic Deformity in Hatchery-reared Red Sea Bream Pagrus major
Relationship between Uninflated Swim Bladders and Lordotic Deformity in Hatchery-reared Red Sea Bream Pagrus major
复制标题
孵化场养殖真鲷鱼鳔未充气与脊柱前凸畸形的关系
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
Watanabe
中科院分区：
文献类型：
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作者：
Yasuo;Tsukashima;S. Fujita;Takeshi;Watanabe
在孵化场饲养的红鲷中经常观察到的脊柱前凸，是日本种子生产中的一个大问题，已知是在鱼鳔未充气的鱼中引起的。饲养实验进行，以确定是否发育异常的鱼鳔是由于未能在水面吞咽空气。一个罐用一层液体石蜡密封，另一个具有开放表面作为对照。对照组第7天左右90%以上的仔鱼具有正常的鱼鳔（全长4.2mm），而密封池中没有一条鱼出现膨胀现象。另一方面，前凸开始出现在孵化后40天左右的鱼与未充气的鱼鳔和超过90%的鱼表现出特征性的前凸，在120天的饲养试验结束。因此，已经表明，在水面上吞咽空气对于最初的鱼鳔充气是必不可少的，并且不充气与脊柱前凸畸形的发展密切相关。文中还讨论了轮虫的营养品质与饲养条件如通气、鱼鳔充气等的关系。
The lordosis frequently observed in hatchery-reared red sea bream, a big problem in the seed production in Japan, is known to be induced in the fish with uninflated swim bladders. Rearing experiments were conducted to determine whether the abnormally developed swim bladders were due to failure in gulping air at the water surface. One tank was sealed with a layer of liquid paraffin and the other with open surface served as a control. Over 90% of the larvae had normal swim bladders at around 7th day after initial feeding (4.2mm in total length) in the control, whereas none was inflated in the sealed tank. On the other hand, the lordosis began to appear at around 40th day after hatching in the fish with uninflated swim bladder and more than 90% of the fish showed characteristic lordosis at the end of the feeding trial of 120 days. Thus, it has been shown that gulping air at the water surface is essential for the initial swim bladder inflation and that the uniflation is closely related to the development of lordotic deformity. The relationship between the nutritional quality of rotifers or rearing conditions such as aeration and swim bladder inflation is also discussed.