[Ecophysiological study on the parasitic action of Cymothoids (author's transl)].

An ecophysiological study on certain parasitisms by Cymothoids allows the elucidation of the following points: --occurrence of oesophagien-side glands producing an anticoagulant effect on the blood of host, the absorption and metabolism of haemoglobin derivatives (hematin and iron) are performed by the hepatopancreas; --existence of immunological reactions between host and Cymothoids; --existence of biochemical, histological, haemotological and biometrical variations among fishes infected by these parasites.