Guéry L., Kaplan David, Marsac Francis, Grande M., Abascal F., Baez J.C., Gaertner Daniel. (2021). Standardized purse seine CPUE of Yellowfin tuna in the Indian Ocean for the European fleet. In :
23ème groupe de travail sur les thons tropicaux. Victoria : CTOI, [58 p. multigr.]. (Documents de Réunion-CTOI ; IOTC-2021-WPTT23-10). WPTT.Working Party on Tropical Tuna, 23., [En ligne], 2021/10/25-2021/10/30.
Titre du document
Standardized purse seine CPUE of Yellowfin tuna in the Indian Ocean for the European fleet
Année de publication
2021
Type de document
Colloque
Auteurs
Guéry L., Kaplan David, Marsac Francis, Grande M., Abascal F., Baez J.C., Gaertner Daniel
In
23ème groupe de travail sur les thons tropicaux
Source
Victoria : CTOI, 2021,
[58 p. multigr.] (Documents de Réunion-CTOI ; IOTC-2021-WPTT23-10).
Colloque
WPTT.Working Party on Tropical Tuna, 23., [En ligne], 2021/10/25-2021/10/30
The time series of EU purse seine fleet catches per unit effort (CPUE) of small (<10kg) and large (>=10kg) yellowfin tuna (YFT) from the Indian Ocean were standardized using an extension of the Delta-lognormal GLMM to three components. These components are: (i) the detection rate of schools per unit of searching time, (ii) the proportion of sets for which the targeted size category is present and (iii) the biomass of the targeted size category in the fish school. The aim was to use the commercial size categories as a proxy to depict the trend in abundance for adult and juvenile YFT observed in free schools (FSC), as well as for juveniles caught under floating objects (FOB).
