02112nab a2200361 a 4500003000900000005001700009008004100026041000800067100003700075700003400112700002900146700002600175245012800201264000900329300001700338500004200355520096100397650003101358650003401389650002601423650003001449650002801479650002601507650002001533650003401553650003201587773004501619942000801664035001701672001000701689999001901696040003501715AR-ReUNN20260702003057.0260630s2006    ag |||||||||||||||||eng  0 aeng1 aJaureguizar, Andrés J.91475711 aMenni, Roberto Carlos91179411 aGuerrero, Raúl91475721 aLasta, Carlos914757310aEnvironmental factors structuring fish communities of the Río de la Plata estuary / Andrés J. Jaurenguizar ...[et al.]. 1c2006  a17 páginas  aDisponible en caja 16 no 25 de INICNE  aWe 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. 4aFactores Ambientales95747 4aComunidades Acuaticas9116943 4aRio de la Plata97617 4aPeces de Agua Dulce96471 4aFreshwater Fish9117439 4aInland Waters9117440 4aArgentina94258 4aEnvironmental Factors9147241 4aAquatic Communities91469730 tFisheries Researchgv. 66 (2004)w234605  cART  a(INICN)36102234698  c234698d234698  aAR-ReUNNbspacAR-ReUNNeaacr2