Studies on the interspecific relationship between Polyoncobothrium magnum and P.(N.) celatus
大型多钩槽绦虫与隐藏新棘虫种间关系研究

Interspecific relationship between P.magnum and P.(N.) celatus in the intestine of ricefield eel were studied on the site occurring alone and together.The distribution of each species in the gut of hosts was extremely similar when the two helminths occurred alone,similarity coefficient is r =0.9226( P <0 01).With P.magnum growing,the distribution of P.magnum moved ahead and the distribution of P.(N.) celatus moved backwards significantly and the niche overlap of two parasites decreased gradually when two helminths co existed in the intestine of ricefield eel. The positive interspecific association of two helminths was significant and their intensity of infection was not altered when P.magnum and P.(N.) celatus co existed in the intestine of ricefield eel.