Relação entre sinais acústicos e taxas de captura da fauna acompanhante na pesca de cerco industrial ao redor de Dispositivos de Agregação de Peixes (DAP)

Abstract

Echo-sound are instruments that operate on the principles of acoustics (waves Mechanical) for remote observation or underwater detection. They are particularly used in industrial purse seine fishing, attached on buoy called Fish Aggregation Devices (FADs). They provide the Precise location of the shoal, as well as indicative of aggregate biomass, thus They decreasing the search time and consequently the costs of the operation. Thus, the echosounder index plus others variables were linear combined for provide CPUE estimation of bycatch fishing on Indian an Atlantic Ocean. Among all species just three had slight correlation with index from telemetric acoustic data (Lepidochelys olivacea, Uraspis secunda e Xiphias gladius), the others had no correlation. Due to the low correlation, it is concluded that low-energy commercial echosounders indices in Fish Aggregation Devices (FAD’s) in the industrial purse-seine fishery for the capture of tunas are not indicated as explanatory variables to estimate the CPUE of bycatch species classified.