Mitigating impacts of fishing on pelagic ecosystems
15-18 Oct 2012 Montpellier (France)

Browse by Author > Beehary Sunil

Monday 15

› 15:50 - 16:10 (20min)
› Auditorium
Temporal patterns of yellowfin and skipjack tuna associated with anchored and drifting FADs
Marc Soria  1@  , Manuela Capello, Fabien Forget, John Filmalter, Sunil Beehary, Riyaz Jauhary, Rodney Govinden, David Itano, Kim Holland, Laurent Dagorn@
1 : Institut de Recherche pour le Développment  (IRD)  -  Website
Université de la Réunion. 15, Avenue René Cassin 97 400 Saint Denis -  Réunion

Using acoustic tagging data, we investigated temporal patterns of the association of yellowfin (Thunnus albacares) and skipjack (Katsuwonus pelamis) tuna with FADs in different situations and locations (anchored FADs in Mauritius, Maldives, Hawaii; drifting FADs in the Western Indian Ocean). We explore the temporal patterns of association characterized by the time of the day at with tuna arrive and depart from FADs to find behavioral trends within species, between species, at different study sites and different types of FADs. This fine scale analysis of behavior is used to determine the preferred time of association for the different species, a major parameter in the catchability of tunas at FADs by fishers.

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