Temporal variation in Engraulis anchoita eggs and larvae abundance in the Northpatagonian littoral between January-April 2001. Larval growth and mortality

Authors

  • Daniel Brown Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
  • Ezequiel Leonarduzzi Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
  • Andrés Averbuj Centro Nacional Patagónico (CENPAT)
  • Juan Livore South Australian Research and Development Institute (SARDI), Aquatic Sciences, Australia

Keywords:

Engraulis anchoita, larvae, growth, otoliths, mortality

Abstract

Argentine anchovy eggs and larvae abundance distribution patterns in the Argentine northpatagonian littoral during January-April 2001 were analyzed. As the season progressed, a process of decline in the reproductive activity was observed. Larval growth and mortality rates were established. Age determinations were performed analyzing otoliths daily increments. The 0.43 mm day-1 growth rate average did not show space-time differences, fact attributed to the homogeneity of the thermal field. The 0.32 d-1 January natural mortality rate was determined by exponential decline. Mortality rates, estimated with the mortality-aggregation model, were considered dependent on the larval size. The value ranges (d-1) were 0.07-0.49, 0.05-0.61 and 0.07-0.51 for January, February, and March-April, respectively.

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Published

2013-10-30

How to Cite

1.
Brown D, Leonarduzzi E, Averbuj A, Livore J. Temporal variation in Engraulis anchoita eggs and larvae abundance in the Northpatagonian littoral between January-April 2001. Larval growth and mortality. Mar Fish Sci [Internet]. 2013Oct.30 [cited 2021Jan.25];23:175-92. Available from: https://ojs.inidep.edu.ar/index.php/mafis/article/view/98

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