<b>Trophic structure of fish assemblages associated with macrophytes in lakes of an abandoned meander on the middle river Purus, brazilian Amazon

  • Monik da Silveira Suçuarana Universidade Federal do Acre.
  • Lucena Rocha Virgílio Universidade Federal do Acre
  • Lisandro Juno Soares Vieira Universidade Federal do Acre

Resumo

The trophic structure of fish assemblages associated with banks of aquatic macrophytes in abandoned meander lakes on the river Purus is investigated. Comparisons between lakes and between different periods of the hydrological cycle are undertaken. Fish samples were collected in six lakes during the rainy (February), ebb (May) and dry (September) season in 2012. Fish stomach contents were analyzed by frequency of occurrence and volume methods, combined in the Feeding Index (IAi). Fish species were included in nine trophic categories, based on IAi rates. The richness and abundance of fish species, by trophic category, was influenced by temporal variations, with no significant spatial variation. Some species changed their diets and were included in different trophic categories according to the period and lake under analysis. Specialist species have also been identified, but failed to change their diets. Differences may be due to the characteristics of macrophytes banks and to the flooding regime which change the availability of food resources.

 

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Biografia do Autor

Monik da Silveira Suçuarana, Universidade Federal do Acre.
Possui graduação em ciências biológicas e mestrado em Ecologia e Manejo de Recursos Naturais pela Universidade Federal do Acre.
Lucena Rocha Virgílio, Universidade Federal do Acre
Possui graduação em ciências biológicas e mestrado em Ecologia e Manejo de Recursos Naturais pela Universidade Federal do Acre. Atualmente é professora da Universidade Federal do Acre.
Lisandro Juno Soares Vieira, Universidade Federal do Acre
É Professor Associado I da Universidade Federal do Acre, onde foi coordenador do Programa de Pós-Graduação em Ecologia e Manejo de Recursos Naturais-PPG/EMRN da Universidade Federal do Acre - UFAC, 
Publicado
2016-07-21
Como Citar
Suçuarana, M. da S., Virgílio, L. R., & Vieira, L. J. S. (2016). <b&gt;Trophic structure of fish assemblages associated with macrophytes in lakes of an abandoned meander on the middle river Purus, brazilian Amazon. Acta Scientiarum. Biological Sciences, 38(1), 37-46. https://doi.org/10.4025/actascibiolsci.v38i1.28973
Seção
Ecologia e Limnologia

 

0.6
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0.6
2019CiteScore
 
 
31st percentile
Powered by  Scopus