SciELO - Scientific Electronic Library Online

 
vol.14 número4A taxonomic revision of the Neotropical electric fish genus Brachyhypopomus (Ostariophysi: Gymnotiformes: Hypopomidae), with descriptions of 15 new speciesEcomorphology and use of food resources: inter- and intraspecific relationships of fish fauna associated with macrophyte stands índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Neotropical Ichthyology

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

Resumo

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.  https://doi.org/10.1590/1982-0224-20150035.

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.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )