Studies on callitetrarhynchosis among marine bluefish euthynnus affinis (balamita),from the red sea in Suez province [electronic resource].

Includes references.

The present study was carried out on 80 marine scombrid bluefrsh which-were col- lected from the Red Sea at Suez during the period .from January 2000 to January 2001 to investigate Callitetrarhynchosis as one of the most prevalent parasitic affections that induces economical losses among the marine scombrid bluefrsh Euthynnus affinis. The frsh were examined externally and necropised. Specimens were collected from the gills. nursculature. peritoneum. myocardium. liver and intestine fixed in 10% neutral buffered formalin and Sum thick paraffin sections were prepared, stained and examined microscopically. External examination of naturally infested fish showed no pathognomonic clinical signs, while the internal examination revealed heavy infestation of plerocercoid larvae especially in liver and musculature of the caudal peduncle, branchial cavity as well as other internal organs. The total prevalence was 51.25% but. in summer. it was 95% with heavy intensity which ranged.from 40 to 70 larvae /fish (summer), 20-34 larvae per fish (spring}, 8-12 larvae per fish (autumn), and 6-10 larvae per frsh (winter}.

Summary in Arabic.

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