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Niche enlargement as a consequence of co-existence: a case study.

Authors
  • Mazzoni, R1
  • Marques, P S
  • Rezende, C F
  • Iglesias-Rios, R
  • 1 Departamento de Ecologia, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil. [email protected] , (Brazil)
Type
Published Article
Journal
Brazilian journal of biology = Revista brasleira de biologia
Publication Date
May 01, 2012
Volume
72
Issue
2
Pages
267–274
Identifiers
PMID: 22735133
Source
Medline
License
Unknown

Abstract

Spatio-temporal changes in the diet, niche breadth and niche overlap of two species of Characidium from three different sites along a Neotropical coastal stream were studied during a dry and rainy season. Seasonal changes were restricted to the occurrence of plant items in the stomach contents. The relative importance of food items in the diet of both species varied across sites, but Diptera, Ephemeroptera, Simuliidae, Trichoptera and Coleoptera larvae were always the main prey items. Contrary to the expected pattern, values of the niche breadth were higher at the site where Characidium species co-existed and niche overlapped at this site indicated 52% (p = 0.52) of feeding overlap.

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