文章摘要
黄琪琰,钱嘉英.鲫鱼鱼怪病的研究[J].水产学报,1980,4(1):71~80
鲫鱼鱼怪病的研究
A STUDY ON THE ICHTHYOXENIASIS OF CARASSIUS AURATUS L.
  
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黄琪琰 上海水产学院 
钱嘉英 上海水产学院 
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中文摘要:
      本文对引起鲫鱼鱼怪病的病原——日本鱼怪的外部形态、内部构造,作了进一步的描述,对鱼怪繁殖期的形态变异进行了详细研究,提出不能将抱卵或抱幼的鱼怪,以及正处在性变阶段的个体误定为新种。对鱼怪的生态、生理和生活史也作了研究。并通过对鱼怪寄生给鲫鱼带来危害的研究,指出凡受鱼怪寄生的鲫鱼其性腺发育无例外的受到严重障碍,所有病鱼的性腺一般发育停留在Ⅰ、Ⅱ期,只有个别的才能发育到第Ⅲ期,完全丧失生殖能力,影响鲫鱼资源。鱼怪病也引起病鱼贫血,胆固醇、血糖、总蛋白含量降低等病理变化;少数几只鱼怪幼虫附着于夏花鱼种的头部、鳃部或胸部在短时间内会造成鱼的死亡。本文还对鱼怪病的防治,提出了初步措施。
英文摘要:
      1. The Crucian carps (Carassius auratus) obtained in Qinpu and Songjiang districtsof Shanghai Municipality are usually heavily infected by the parasitic Isopod- Ichthyoxenus japonensis. 2. The parasites, in pairs dwell in a pouch occupying nearly one-third or half ofthe body cavity of the host, and an opening is situated near the base of the pectoral fins. 3. The fishes bearing the parasites have the gonads poorly developed. nearly 97%of them have the gonads remained at stages Ⅰ--Ⅱ, seldomly at Ⅲ. 4. The body size of the female parasite. attains a longth of 1. 4--2. 1 cm, while themale has only half the length. In the breeding season. the female moults and form a broodpouch by the flat projections of the five pairs of thoracic legs. The abdominal append-ages function as gills. 5. In Shanghai and its vicinity, the breeding season of Ichthyoxenus begins fromAprill to October. The fertilized eggs are released into the brooding pouch and developinto first stage larvae. After a moult the larvae enter to the second stage. They possessthe ability of free swimming, and than larvae the pouch to find hosts. 6. There are great difficulties in eliminating the adult Ichthyoxenus from the hostby chemical treatments, so that the preferable way is to kill the larvae in their free swim-ming stage. During the breeding season, by spraying 0. 1 p. p. m. sodium pantachloro-phenate along the littoral zone once a month seems avilable.
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