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Modelling the spatial behaviour of a tropical tuna purse seine fleet

Year of publication 2014

Product type Meeting

Category Meeting document

Edition 1

Statutory body / Meeting title Indian Ocean Tuna Commission (IOTC)

Meeting symbol IOTC-2014-WPTT16-14

Meeting Session Number 16

Language English

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    Statistical data for the France’s Overseas Territories (FRAT) purse seine fleet have been collected by the “Institut de Recherche pour le D ?eveloppement” (IRD) since 2001. Purse seiners registered in the harbour of Dzaoudzi, Mayotte, belong to the EU purse seine fleet of the Indian Ocean and data collection and processing are similar to the ones used for the French component of the fleet. Tropical tu purse seiners target yellowfin (Thunnus albacares), skipjack (Katsuwonus pelamis), and bigeye t u (Thunnus obe- sus) through two major fishing modes that result in different species and size composition of the catch: fish-aggregating device-associated (FAD) and free-swimming schools (FSC). Here, the acronym ”FAD” encompasses any type of drifting floating object to which tu schools can associate. This definition includes ”tural” objects (e.g. logs, palm branches) and anthropogenic floating objects, such as man- made bamboo rafts equipped with radio-range beacons, satellite transmitters and scanning sors. The fleet activities are described through a suite of fisheries indicators that provide information on fishing capacity and effort, catch, and catch rates for the 3 principal market tropical tus, with a particular focus on the year 2012.
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