02059nab a2200349 a 4500 AR-ReUNN 20260702003057.0 260630s2006 ag |||||||||||||||||eng eng Jaureguizar, Andrés J. 147571 Menni, Roberto Carlos 117941 Guerrero, Raúl 147572 Lasta, Carlos 147573 Environmental factors structuring fish communities of the Río de la Plata estuary / Andrés J. Jaurenguizar ...[et al.]. 2006 17 páginas Disponible en caja 16 no 25 de INICNE We examined the changes in composition of fish assemblages for all seasons in the Río de la Plata estuary (36°S, 56°W), and identified the parameters that control the main structuring of the estuarine community. Multivariate analysis (DCCA), performed on species biomass (t nm-2), indicated a spatial structuring of the estuarine community in three areas: inner, central and outer. Bottom salinity was the main factor associated with the significant differences in species composition. Examination of the estuary as a whole indicated a persistent spatial pattern, and suggested that temperature has the strongest influence on seasonal structure of fish assemblages. Both seasonal migrations (for example, of Trichiurus lepturus and Discopyge tschudii) and reproductive movements (for example, of Micropogonias furnieri, Mustelus schmitti and Cynoscion guatucupa), appear as important factors affecting the temporal structure of the estuarine community. Factores Ambientales 5747 Comunidades Acuaticas 116943 Rio de la Plata 7617 Peces de Agua Dulce 6471 Freshwater Fish 117439 Inland Waters 117440 Argentina 4258 Environmental Factors 147241 Aquatic Communities 146973 Fisheries Research v. 66 (2004) 234605 ART (INICN)36102 234698 234698 234698 AR-ReUNN spa AR-ReUNN aacr2