Age, growth and mortality of white grunt caught in Pernambuco State, Brazil


  • Jonas Eloi de VASCONCELOS-FILHO Universidade Federal Rural de Pernambuco -  UFRPE, Departamento de Estatí­­stica e Informática -  DEINFO, campus Dois Irmãos
  • Rosangela Paula Teixeira LESSA Universidade Federal Rural de Pernambuco -  UFRPE, Departamento de Pesca e Aquicultura -  DEPAq, Campus Dois Irmãos
  • Francisco Marcante SANTANA Universidade Federal Rural de Pernambuco -  UFRPE, Unidade Acadêmica de Serra Talhada -  UAST



otolith, von Bertalanffy equation, artisanal fishery, trap fishery


The aim of the present study was to measure the primary growth parameters and to estimate the mortality of the white grunt Haemulon plumierii in the state of Pernambuco, Brazil. Sagittal otoliths were collected monthly from May 2013 to April 2014 from three different commercial fishing landings along the coast of Pernambuco. A total of 333 individuals measuring 10.5 to 32.2 cm total length were caught. The total length distributions were different between locations. The weight-length relationships and the von Bertalanffy equations were statistically different between the three fishing sites. The weight-length relationship indicated negative allometric growth, therefore the von Bertalanffy equation for pooled sexes was TLt = 31.1[1-e-0.1 (t +4.57)]. The maximum observed age was 21 years and the mortality rate was 0.21 year-1. The conducted analysis indicates a species with long life cycle and slow growth. Small reef fish with slow movement, such as the white grunt, are susceptible to fishing efforts, environmental factors and degradation, which affect growth and mortality. Therefore, we suggest an assessment of the status of the stock.


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