Soto M., Fernandez F., Delgado de Molina A., Chassot Emmanuel. (2014). Standarized CPUE for skipjack tuna from the european purse seine fleet in the Indian ocean from 1984 to 2013. In :
16ème groupe de travail sur les thons tropicaux. Victoria : CTOI, 8 p. (Documents de Réunion ; IOTC-2014-WPTT16-24). GTTT : Groupe de Travail sur les Thons Tropicaux, 16., Bali (IDN), 2014/11/15-19.
Titre du document
Standarized CPUE for skipjack tuna from the european purse seine fleet in the Indian ocean from 1984 to 2013
Année de publication
2014
Type de document
Colloque
Auteurs
Soto M., Fernandez F., Delgado de Molina A., Chassot Emmanuel
In
16ème groupe de travail sur les thons tropicaux
Source
Victoria : CTOI, 2014,
8 p. (Documents de Réunion ; IOTC-2014-WPTT16-24).
Colloque
GTTT : Groupe de Travail sur les Thons Tropicaux, 16., Bali (IDN), 2014/11/15-19
In this document an abundance index is obtained for the tropical tuna skipjack (Katsuwonus pelamis) of European purse seine fishery in the Indian Ocean from 1984 to 2013 using generalized linear models. Catch and effort data come from detailed daily logbooks. Catch rates are modeled using the delta lognormal model. The method estimates a cpue from aggregated positive catches, and the proportion of catches, so the final individual abundance indices are calculated multiplying both estimators for each species. Explanatory factors used in the analysis are: year, zone, quarter, holding capacity, country and starting date of the vessel. Year is the most explanatory factor of variability in cpue followed by the fishing area and the quarter. Vessel characteristics have a significant explanatory effect in observed positive catch rates.
Plan de classement
Stocks [040PECHE03]
Descripteurs
PECHE THONIERE ; SENNEUR ; CAPTURE ; EFFORT DE PECHE ; ABONDANCE ; ESTIMATION DE STOCK ; DISPOSITIF DE CONCENTRATION DES POISSONS ; VARIATION PLURIANNUELLE
