Article: Dreissena polymorpha and Conchophthirus acuminatus: what can we learn from host-commensal relationships.(Report)

ABSTRACT Host specificity, extremely high prevalence and infection intensity, and easy sampling make the mantle-cavity ciliate Conchophthirus acuminatus a very convenient model to address numerous fundamental questions relating to symbiosis and commensalism. The acquisition of food by the ciliate as a result of Dreissena filtration activity is probably the basis of the symbiosis, with additional benefits to C. acuminatus being shelter, provision of oxygen, and dispersal. The number of C. acuminatus in a Dreissena population depends on the mussel's size-frequency distribution as there is a direct correlation between Dreissena size anal infection intensity. Lack of a ...

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