Riparian coverage affects diets of characids in neotropical streams

Autor(es)

Ferreira, Anderson ^[1] ; de Paula, Felipe R. ^[2] ; de Barros Ferraz, Silvio F. ^[2] ; Gerhard, Pedro ^[3] ; Kashiwaqui, Elaine A. L. ^[4] ; Cyrino, Jose E. P. ^[5] ; Martinelli, Luiz A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, CENA, Lab Ecol Isotop, BR-13416970 Piracicaba, SP - Brazil

^[2] Univ Sao Paulo USP ESALQ, Dept Ciencias Florestais LCF, Piracicaba, SP - Brazil

^[3] EMBRAPA Amazonia Oriental, Empresa Brasileira Pesquisa Agropecuaria EMBRAPA, Belem, PA - Brazil

^[4] Univ Estadual Oeste Parana GETECH UNIOESTE, Bolsista PNPD CAPES, Toledo, Parana - Brazil

^[5] Univ Sao Paulo USP ESALQ, Dept Zootecnia LZT, Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ECOLOGY OF FRESHWATER FISH; v. 21, n. 1, p. 12-22, JAN 2012.
• Citações Web of Science: 31

Resumo

Aquatic ecosystems are influenced by the surrounding terrestrial environment. This work studied the influence of vegetation of riparian zones on the feeding patterns of two nektonic characids, Astyanax paranae and Bryconamericus iheringii, in a basin surrounded by an agricultural area. Nine streams within the Corumbatai River basin (Sao Paulo State, Brazil) with varying proportions of adjacent riparian forest (RF) and pastures were set apart in three arbitrary categories: Riparian Forest (> 90% RF), Mixed Coverage (banks covered by 30-60% RF; MC) and Pasture (< 29% RF, PA); resident characids were sampled in the dry and rainy seasons and evaluated in regard to composition of diets. Astyanax paranae fed on allochthonous food sources in RF and MC, and on autochthonous food sources on PA streams; B.iheringii fed on autochthonous food sources in RF streams and in mixed resources (detritus and sediment) in PA streams. Selection of food source was related to, and altered by, stream channel structure and composition of substratum. Preservation and restoration of native riparian vegetation is key to preservation of resident characids in small streams of this river basin. (AU)

• Processo FAPESP: 03/10505-0 - Ecologia alimentar e ecomorfologia de tetragonopterinae (osteichtyes, characiformes, characidae) e suas interacoes com a estrutura da vegetacao riparia, em riachos da bacia do rio passa-cinco, sp.
• Beneficiário: Anderson Ferreira
• Modalidade de apoio: Bolsas no Brasil - Doutorado