Characterization of the “El Rincón” area (Buenos Aires Province) as reproduction ground for coastal fishes

Authors

  • Marcelo Acha Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) - Instituto de Investigaciones Marinas y Costeras (IIMyC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
  • Marta Orduna Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
  • Karina Rodrígues Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) - Instituto de Investigaciones Marinas y Costeras (IIMyC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
  • María Inés Militelli Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) - Instituto de Investigaciones Marinas y Costeras (IIMyC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
  • Mara Braverman Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)

Keywords:

Ichthyoplankton, reproduction, coastal fishes, oceanography

Abstract

In order to characterize the “El Rincón” spawning ground, adult fishes were caught with a bottom trawl net and ichthyoplankton samples obtained with a Nackthai net. Salinity and temperature were measured with a CTD. Samples and measurements were performed during the EH-03/08 scientific cruise carried out in November 2008. The region is characterized by the presence of an oceanographic front formed by waters diluted by the discharges of the Negro and Colorado rivers, high salinity waters originated in the San Matías Gulf and intermediate salinity continental shelf waters. The eggs and/or larvae identified corresponded to Argentine anchovy, Brazilian flathead, Argentine seabass, red porgy, leatherjack, butterfish, flatfish and sciaenids and gravid females of stripped weakfish, red progy, Brazilian flat-head, Argentine sandperch, Argentine seabass, leatherjack, flatfish, Atlantic searobin, Brazilian sandperch, red mullet, cocherito and midshipman. The results obtained and the information published allow to suggest that the settlement of a multispecific spawning ground in the area is due to the existence of a recirculation cell that would favour retention of eggs and larvae in the area, to the abundance of zooplankton components that serve as food for larvae and to the closeness of a juvenile nursery ground in the saltmarshes and tidal creeks zone that extends from Bahía Blanca to the Negro river mouth. 

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Published

2012-12-31

How to Cite

1.
Acha M, Orduna M, Rodrígues K, Militelli MI, Braverman M. Characterization of the “El Rincón” area (Buenos Aires Province) as reproduction ground for coastal fishes. Mar Fish Sci [Internet]. 2012Dec.31 [cited 2021Feb.25];21:31-43. Available from: https://ojs.inidep.edu.ar/index.php/mafis/article/view/110