河北地区沿海盐场卤虫品系的组成

Constitution of Artemia Strains in Coastal Salterns of Hebei Province

对河北地区海丰盐场和王凤玉盐场的卤虫品系组成情况进行了分析,结果显示,由于人为引种及在虾蟹育苗中不同品系卤虫卵的不当使用,使得该地区卤虫由原来单一的孤雌生殖品系组成变为目前的本地孤雌生殖卤虫、两性生殖的旧金山卤虫(Artemia franciscana)以及中华卤虫(A.sinica)混杂组成,其中外来种旧金山卤虫为优势种群,中华卤虫只是偶尔见到。由于竞争排斥效应,孤雌生殖和两性生殖卤虫产生了生态位的分化,孤雌生殖卤虫主要分布在低盐度的盐池,两性生殖卤虫主要分布在高盐度的盐池。

The constitution of Artemia species of Haifeng Saltem and Wangfengyu Saltem of Hebei Province was studied. Results showed that there were three species in the two saltems： Artemia franciscana, A. sinica and the endemic parthenogenetic species because of the introduction of exotic species and incorrect use of different Artemia strains in aquaculture. Exotic species-A, franciscana is the dominant population. A. sinica can be seen only occasionally. Due to competition exclusion effect, bisexual and parthenogenetic species are ecologically separated. Bisexual species mainly distributed in high salinity saltems, while parthenogenetic species mainly distributed in low salinity saltems.