Contribuição De Fontes Autotróficas C3 e C4 Para Characiformes Juvenis Em Plantas Herbáceas Aquáticas No Rio Solimões, Amazônia Central, Brasil (original) (raw)

2019

Abstract

Understanding the factors that control production of commercially important fishes in the Amazon are necessary to effectively manage fisheries resources in the region. The first step of this understanding demands the identification of plants that contribute to the energy flow in fish’s food web. The objective of this study was to investigate which group of plants supports the production of Characiformes during their juvenile life phase, in which these fish inhabit an environment formed by C 3 and C 4 plants. A carbon isotope analysis was conducted for juvenile Characiformes collected from herbaceous aquatic stands of the Solimoes River floodplain. The diet of these fishes was also analyzed to identify possible trophic links. The results indicate that although C 3 plants are the main energy sources of juveniles, the juvenile stage is that the sampled species have higher contribution from group of C 4 plants. A diet analysis revealed that juveniles of Brycon amazonicus , Mylossoma dur...

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