Assessing Atlantic sailfish catch rates based on Brazilian sport fishing tournaments (1996-2014)

Authors

  • Bruno L. MOURATO Universidade Federal de São Paulo, Departamento de Ciências do Mar
  • Humberto HAZIN Universidade Federal de São Paulo, Departamento de Ciências do Mar / Universidade Federal Rural do Semiárido http://orcid.org/0000-0002-5999-2230 (unauthenticated)
  • Fábio HAZIN Universidade Federal Rural de Pernambuco, Departamento de Pesca e Aquicultura, Laboratório de Oceanografia Pesqueira http://orcid.org/0000-0003-3755-5379 (unauthenticated)
  • Felipe CARVALHO NOAA Pacific Islands Fisheries Science Center
  • Alberto Ferreira de AMORIM Instituto de Pesca -  SAA -  SP

DOI:

https://doi.org/10.20950/1678-2305.2016v42n3p625

Keywords:

catch per unit effort (CPUE), billfishes, generalized linear model, tweedie distribution

Abstract

In the present study, a generalized linear model (GLM), assuming a Tweedie distribution and log as link function, was used to generate a standardized catch per unit effort (CPUE) series for the sailfish caught by sport fishing boats based in São Paulo, Rio de Janeiro, Espí­­rito Santo and Bahia States, from 1996 to 2014. The response variable was the number of sailfish caught per number of boats registered in the tournament per day. The following factors were tested in the analyses: "year" "month" and "local" representing the main effects of the explanatory variables. The overall pattern of the standardized catch rate indicates a relatively stable trend with a slight decline in the recent years, from 2009 to 2014.

Downloads

Published

2016-09-30

Issue

Vol. 42 No. 3 (2016): BOLETIM DO INSTITUTO DE PESCA

Section

Scientific Article

Most read articles by the same author(s)