TY - JOUR
T1 - Un modelo espacialmente explícito para predecir la ocurrencia de cuadrantes con capturas nulas en la pesquería de túnidos que opera con red de cerco en el océano Pacífico Tropical Oriental
AU - Marín-Enríquez, Emigdio
AU - Moreno-Sánchez, Xchel G.
AU - Urcádiz-Cázares, Francisco J.
AU - Morales-Bojórquez, Enrique
AU - Ramírez-Pérez, J. Saúl
N1 - Publisher Copyright:
© 2020, Universidad Autonoma de Baja California. All rights reserved.
PY - 2020
Y1 - 2020
N2 - Null purse seine sets (those in which the catch is zero) are common in every tuna fishery in the world. Current evidence suggests that different environmental factors can influence the occurrence of null sets. In this study, we used a long-term (2003–2015) database from the tuna purse seine fishery in the eastern Pacific Ocean to analyze the temporal and spatial variability of the occurrence of 1º × 1º quadrants where the retained tuna catch was zero (“null cells”). We fitted a logistic generalized additive model to predict the occurrence of null cells as a function of environmental and operational covariates. Results of the modeling process suggested that high probabilities of null cell occurrence exist mainly in 2 environmentally different zones: the entrance to the Gulf of California, Mexico, and off the coast of Central America. The final statistical model suggested that operational variables (number of sets, type of fishing indicator) are more important to null cell occurrence than environmental factors (sea surface temperature, chlorophyll concentration, sea level anomaly, and El Niño events).
AB - Null purse seine sets (those in which the catch is zero) are common in every tuna fishery in the world. Current evidence suggests that different environmental factors can influence the occurrence of null sets. In this study, we used a long-term (2003–2015) database from the tuna purse seine fishery in the eastern Pacific Ocean to analyze the temporal and spatial variability of the occurrence of 1º × 1º quadrants where the retained tuna catch was zero (“null cells”). We fitted a logistic generalized additive model to predict the occurrence of null cells as a function of environmental and operational covariates. Results of the modeling process suggested that high probabilities of null cell occurrence exist mainly in 2 environmentally different zones: the entrance to the Gulf of California, Mexico, and off the coast of Central America. The final statistical model suggested that operational variables (number of sets, type of fishing indicator) are more important to null cell occurrence than environmental factors (sea surface temperature, chlorophyll concentration, sea level anomaly, and El Niño events).
KW - Eastern Pacific Ocean
KW - Remote sensing
KW - Seiners
KW - Tuna fisheries
UR - http://www.scopus.com/inward/record.url?scp=85083164165&partnerID=8YFLogxK
U2 - 10.7773/cm.v46i1.3026
DO - 10.7773/cm.v46i1.3026
M3 - Artículo
SN - 0185-3880
VL - 46
SP - 19
EP - 38
JO - Ciencias Marinas
JF - Ciencias Marinas
IS - 1
ER -