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- W4236089340 abstract "Two oceanographic surveys were conducted across the salinity gradient of the Rı́o de la Plata Estuary during austral late spring and summer. Ichthyoplankton was dominated by families Sciaenidae, Clupeidae, Engraulidae, Cynoglossidae and Carangidae. The distribution of larval fish assemblages was strongly associated to the salinity structure. Oceanographic conditions were characterized by a large salt wedge (180 km long and a vertical salinity gradient up to 10 units per meter). During both sampling periods each ichthyoplankton assemblage was related to the same region of the salt wedge: the fresh water environment, the bottom salinity front, the mixohaline zone and the outer portion (surface salinity front) of the estuary. Larval assemblages were not related to the thermal structure. Reproductive activity of fishes inside the Rı́o de la Plata Estuary is relatively common (60% of the teleosts sampled use this estuary as a nursery ground). Moreover, the high incidence of pelagic eggs spawners (75% of the species present in the ichthyoplankton) in the Rı́o de la Plata contrasts to the vast majority of estuaries, where this reproductive strategy is poorly represented. Estuarine dynamics plays a dominant role in allowing this reproductive style in this estuary. Spring–summer wind pattern should generate a retentive environment which could minimize advective losses of eggs and larvae to the adjacent ocean." @default.
- W4236089340 created "2022-05-12" @default.
- W4236089340 creator A5001581369 @default.
- W4236089340 date "2004-05-01" @default.
- W4236089340 modified "2023-09-26" @default.
- W4236089340 title "Spatial patterns of ichthyoplankton assemblages in the R�o de la Plata Estuary (Argentina?Uruguay)" @default.
- W4236089340 doi "https://doi.org/10.1016/s0272-7714(04)00063-0" @default.
- W4236089340 hasPublicationYear "2004" @default.
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