Resumo
The instantaneous mortality coefficient (F + M) of the commercial weakfish, Macrodon ancylodon (Bloch, 1801) caught by trawls along southern Brazilian coast (from latitude 28ºS to 34ºS), was computed by means of the annual catch variation (in number) by age per fishing effort from March 1961 to December 1964. The instantaneous mortality coefficient mean values for female and male was respectivelly 1.31 and 1.53. One year old recruits appear in the landings and the mesh selectivity operates on fish up to three years old. Three-year old class predominates in the landings.
Mortalidade da pescada-foguete, Macrodon ancylodon
N. Yamaguti
Instituto Oceanográfico da Universidade de São Paulo
SYNOPSIS
The instantaneous mortality coefficient (F + M) of the commercial weakfish, Macrodon ancylodon (Bloch, 1801) caught by trawls along southern Brazilian coast (from latitude 28ºS to 34ºS), was computed by means of the annual catch variation (in number) by age per fishing effort from March 1961 to December 1964.
The instantaneous mortality coefficient mean values for female and male was respectivelly 1.31 and 1.53.
One year old recruits appear in the landings and the mesh selectivity operates on fish up to three years old.
Three-year old class predominates in the landings.
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BIBLIOGRAFIA
(Recebido em 16/8/68)
Publ. n.º 269 do Inst. Ocean, da USP.
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- RICHARDSON, I. D. & SANTOS, E. P. dos 1962. Note on the selectivity of meshes used by the Santos fishing fleet. Bolm Inst, oceanogr. S Paulo, vol. 12, n.ş 1, p. 33-52.
- SANTOS, E. P. dos 1968. Estudo populacional do goete, Cynoscion petranus (Ribeiro, 1915). Ciênc. Cult. S Paulo, vol. 20, n.ş 2, p. 319.
- SANTOS, E. P. dos & YAMAGUTI, N. 1965. Migração da pescada-foguete, Macrodon ancylodon. Bolm Inst, oceanogr. S Paulo, vol. 14, p. 129-131.
- YAMAGUTI, N. 1967. Desova da pescada-foguete, Macrodon ancylodon. Bolm Inst, oceanogr. S Paulo, vol. 16, n.ş único, p. 101-106.
- YAMAGUTI, N. & SANTOS, E. P. dos 1966. Crescimento da pescada-foguete, Macrodon ancylodon: aspecto quantitativo. Bolm Inst, oceanogr. S Paulo, vol. 15, n.ş 1, p. 75-78.
Datas de Publicação
-
Publicação nesta coleção
14 Jun 2012 -
Data do Fascículo
1968
Histórico
-
Recebido
16 Ago 1968
