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Neotropical Ichthyology

versão impressa ISSN 1679-6225versão On-line ISSN 1982-0224


CORBETTA, Daiany de Fátima; VERONEZZI, Ana Lúcia  e  BENEDITO, Evanilde. Body condition and energy density of juvenile streaked prochilod Prochilodus lineatus (Valenciennes, 1837) in a Neotropical floodplain. Neotrop. ichthyol. [online]. 2016, vol.14, n.4, e150035.  Epub 22-Dez-2016. ISSN 1982-0224.

Variations in energetic density (E D ) and the relative condition factor (K n ) of juveniles of Prochilodus lineatus were investigated to identify whether these two variables respond similarly to environmental factors. We hypothesized that fluviometric levels in different sub-basins of the Upper Paraná River floodplain positively influence the E D and K n of juvenile fish. Temporally, the values of E D and K n were linked more directly to the dynamics of the flood pulses on the plain. Spatially, the lowest values of E D and K n were observed in the environment that was directly affected by the operation of dams, the sub-basin Paraná. Although the energy density and condition factor did not show similar results for juveniles in some of the analyses, the evaluation of both parameters provided a complementary tool and additional information that enabled a more accurate investigation of the temporal and spatial dynamic processes in this Neotropical floodplain. We conclude that water level variations in different sub-basins of the Upper Paraná River floodplain considerably affect the relative condition factor and energy status of P. lineatus . We suggest that the impacts of this modification should be mitigated or avoided in order to maintain fish stocks and promote ecosystem integrity.

Palavras-chave : Condition Factor; Food web; Habitat; Impact; Paraná basin.

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