摘要
对国内新发现的江河等足类寄生虫病病原的外部形态、生活习性及寄生特性进行了初步观察与描述.该病病原为2种,1种寄生于鱼类鳃腔、胸鳍基部及体表,为纺锤水虱科(Aegidae)海弯水虱属(Alitropus)种类(Alitropus sp.),另1种寄生于虾体表或甲壳内,偶见于鱼类体表、鳃腔与口腔,为珊瑚水虱科(Corallanidae)的种类.此2种寄生虫均属淡水或低盐度型底栖类,可短时间自由游泳、具暂寄生性,4～10月为其繁殖期.Alitropus sp.以吸食宿主体液和组织为生,对宿主无专一选择性,群袭特性明显,未见洞穿宿主体壁现象.由该病原引起的疾病流行高峰季节为7～10月.珊瑚水虱则主要危害软壳及抱卵的宿主,致使其附肢残缺、卵块脱落,或因无法游泳上浮而缺氧死亡.
This present paper reported the primary observation and description of the morphology,living habits and parasitic features of the two newly found Isopods in rivers in China.One Isopod boards at gill cavity,base part of pectoral fin,or body surface of fish host,and it was identified to be a species of Alitropus.The other isopod was identified as a species of Corallanidae,and it mainly attaches to the surface of shrimp's shell or digs into the shell,occasionally found on the fish body surface,gill cavity and oral cavity.These two kinds of parasites are both benthic isopods living in freshwater or low salinity water.They are temporal parasites and able to do free-swimming for a short time.The reproduction season is from April to October.Alitropus sp.was found to suck and feed on the body liquid and tissues of the hosts.They mainly parasite on the gill and pectoral fin,with no specific selection to the hosts.They obviously attack hosts in groups,and it hasn't been observed that the body surface of the host fish is penetrated by the parasites.The peak epidemic season of this parasitic disease is from July to October.The species of Corallanidae mainly harms the host which has soft shell and holding eggs,causes the thoracopods and pleopods of the host to be incomplete,the egg block falls off,or will be unable swim up and die of anoxia.
出处
《中国水产科学》
CAS
CSCD
北大核心
2007年第6期1023-1026,共4页
Journal of Fishery Sciences of China
基金
农业部渔业病害检测项目(1251010607009)
广东省科技计划项目(2005A20401002)
关键词
珠江水系
病原
寄生性等足类
外部形态
生活习性
寄生特性
Peal River System
pathogeny
parasitic Isopods
morphology
living habit
parasitic features
