寄生于罗非鱼的刺纹车轮虫种群分析及其寄主偏好性研究

POPULATION ANALYSIS AND HOST PREFERENCE OF TRICHODINA CENTROSTRIGATA BASSON, VAN AS & PAPERNA, 1983 FROM TILAPIA

  • 摘要: 文章在刺纹车轮虫Trichodina centrostrigata Basson, Van As & Paperna, 1983的重描述基础上, 基于形态学特征、分子特征及系统发育分析, 对其种群多样性及寄主偏好性进行了研究。结果表明, 刺纹车轮虫三个种群: Trichodina centrostrigata (KP295473)、Trichodina centrostrigata (W)和Trichodina centrostrigata (Q)在历经4年的时间里, 未发生明显的种群分化; 其次, 刺纹车轮虫与寄生于海水寄主的车轮虫聚支, 表明二者具有较近的亲缘关系; 再次, 刺纹车轮虫主要寄生于鲈形目的广盐性罗非鱼, 少数寄生于其他淡水鱼类, 具有较强的寄生特异性; 最后, 此研究中的寄主罗非鱼对于刺纹车轮虫具有100%的高感染率, 表明刺纹车轮虫为罗非鱼养殖业中一类潜在病害性微生物。

     

    Abstract: On the basis of redescription of Trichodina centrostrigata Basson, Van As & Papema, 1983, we further explored the population diversity and host preference based on morphological characteristics, molecular characteristics and phylogenic analyses. The results showed that the three populations, viz. Trichodina centrostrigata (KP295473), Trichodina centrostrigata (W) and Trichodina centrostrigata (Q), had no obvious population differentiation in the last four years. Next, T. centrostrigata clustered trichodinids that live in the marine environment, which indicates a closer relationship between them. Again, T. centrostrigata has a strong parasitic specificity because they mainly parasitize the euryhaline tilapia, and only very few can parasitize other freshwater fishes. Finally, the host tilapia infection rate for T. centrostrigata in this study is 100%, which suggested that T. centrostrigata may be a potential pathogeny in the tilapia aquaculture industry.

     

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