Identification of the variables that affect the spawning fraction of Argentine anchovy (Engraulis anchoita) Northern stock using generalized linear models

Authors

  • Ezequiel Leonarduzzi Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
  • Emiliano Di Marco Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
  • Marcelo Pájaro Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)

Keywords:

Engraulis anchoita, reproduction, spawning frequency, spawning, pelagic fish, generalized linear models

Abstract

The daily spawning females fraction (S) of Argentine anchovy (Engraulis anchoita) in relation to the year, length, proportion of females, temperature and salinity variables was studied using generalized linear models. Samples were collected during eleven research surveys carried out in the main spawning seasons and areas during 1993-2008. The aim of this work was to identify the factors that affect the spawning activity. No temporary differences were observed and an S 0.12 average value was estimated. The poor explanatory percentage of the models analyzed did not allow to clearly detect the variables that could affect S. Length and temperature were the only variables that related positively, which suggests that Argentine anchovy spawning activity might be related to the population females size composition that would be affected by the environment.

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Published

2013-10-30

How to Cite

1.
Leonarduzzi E, Di Marco E, Pájaro M. Identification of the variables that affect the spawning fraction of Argentine anchovy (Engraulis anchoita) Northern stock using generalized linear models. Mar Fish Sci [Internet]. 2013Oct.30 [cited 2021Mar.2];23:23-34. Available from: https://ojs.inidep.edu.ar/index.php/mafis/article/view/89

Issue

Vol. 23 (2013): Revista de Investigación y Desarrollo Pesquero

Section

Original Research Papers

License

Copyright (c) 2013 Ezequiel Leonarduzzi, Emiliano Di Marco, Marcelo Pájaro

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