El zooplancton del hábitat reproductivo de la población bonaerense de anchoíta (Engraulis anchoita), con especial énfasis en crustáceos
The information gathered in Argentine anchovy (Engraulis anchoita) Northern population assessment cruises allowed to perform studies on the zooplankton community of the Buenos Aires shelf since 1995. In this work the most relevant results as regards the taxonomy and size structure of the community, faunistic areas, and 'key' species in relation to the hydrographic conditions and frontal systems of the region are presented. Besides, the consequences those results might have on Argentine anchovy trophic ecology are analyzed. The taxonomic groups studied included copepods, cladocerans, appendicularians, chaetognaths, amphipods, and euphausiids. The multivariate analysis applied to quantitative data allowed to clearly distinguish three faunistic areas with different taxa and oceanographic conditions: Río de la Plata River (ARP), coastal (AC), and shelf (AP). Although predominance of copepods less than 1 mm total length was observed in the three areas, the largest abundances were registered in ARP and AC, Argentine anchovy reproductive habitat. The high abundance, wide distribution and size structure of Oithona nana, O. helgolandica, and Paracalanus parvus turn the species into key prey for the different E. anchoita ontogenic stages.
| Main Authors: | , , , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Spanish / Castilian |
| Published: |
2013
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| Subjects: | Zooplankton, Biogeography, Fauna, Fronts, Trophic relationships, Abundance, Pelagic fisheries, |
| Online Access: | http://hdl.handle.net/1834/5497 |
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