Caracterización de la zona de 'El Rincón' (provincia de Buenos Aires) como área de reproducción de peces costeros
In order to characterize the 'El Rincón' (Buenos Aires prov., Argentina) 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 RV Eduardo Holmberg 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.
| Auteurs principaux: | , , , , |
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| Format: | Journal Contribution biblioteca |
| Langue: | Spanish / Castilian |
| Publié: |
2012
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| Sujets: | PSW, Argentina, Buenos Aires, El Rincon, marine environment, Ichthyoplankton, Marine fish, Spawning grounds, Coastal zone, Reproduction, Oceanography, , |
| Accès en ligne: | http://hdl.handle.net/1834/4910 |
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