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Cybium,
Revue
Internationale dIchtyologie |
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Composition and abundance of pelagic shark by-catch in the eastern Mediterranean Sea Persefoni MEGALOFONOU, Dimitrios DAMALAS & Costas YANNOPOULOS (1) (1) Department
of Biology, University of Athens, Panepistimiopolis, 15784 Athens, GREECE.
Abstract.
- During the period 1998-2001, a survey to study the incidence of
the drifting longline fishery on shark populations was carried out in
the eastern Mediterranean Sea. A total of 8 different pelagic shark species
were recorded in the catches of the Greek swordfish and albacore longline
fisheries. Among them, the blue shark, Prionace glauca, was the
most common species in the catches while the bigeyed sixgill shark, Hexanchus
nakamurai, was reported for the first time in the area. Shark by-catches
were noteworthy in the swordfish fishery reaching a 3.8% in number and
3.6% in biomass of the total catch. The higher abundance indices were
observed in the Levantine Basin (CPUE = 0.74 sharks/1,000 hooks). Catches
in this area consisted of much larger specimens than those measured in
other areas of the Mediterranean Sea. |
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