鲤鱼棘头虫病的研究

本文报道了1985-1987年在崇明县新民第三水产养殖场对鲤鱼棘头虫病的病原、症状及治疗方法的研究结果。该病可引起鲤鱼自夏花至成鱼大批死亡，全场感染率在70％以上；发病严重的鱼池则感染率高达100％，死亡率高达60％．病鱼肠壁上形成肉芽肿结节，严重时能使内脏粘连，甚至体壁溃烂和穿孔。病原是崇明长棘吻虫(新种）Rhadinorhynchus chongmingnensis sp.nov.。扫描电镜观察，吻上布满细毛。有吻钩14纵行，每行29～32个吻钩，粘液腺8个。治疗方法为每天每公斤鱼拌饵投喂0．6毫升四氯化碳，连服6天，效果良好．     

A new species of Heterixalus (Amphibia: Hyperoliidae) from western Madagascar

A new species of hyperoliid frog, Heterixalus carbonei n.sp., is described from the Antsingy forest inwestern Madagascar. It is characterized by an advertisement call consisting of long and regular note series. The only other Heterixalus with a similar call structure, H. betsileo from higher altitudes in eastern Madagascar, has distinctly shorter notes. After recent discoveries of the occurrence of H. luteostriatus and H. tricolor in western Madagascar, the new species brings the number of Heterixalus known from western Madagascar to three.