Vertical segregation of two species of Hyphessobrycon(Characiformes: Characidae) in the Cabiúnas coastal lagoon, southeastern Brazil
作者： Sergio M. Q. Lima , André A. Cunha , Jorge I. Sánchez-Botero , Érica P. Caramaschi
DOI: 10.1590/S1679-62252008000400018
关键词:
摘要: Segregation in the use of water column by two congeneric species Characidae, Hyphessobrycon bifasciatus and H. luetkenii, was investigated through underwater observations Cabiunas coastal lagoon northeastern Rio de Janeiro, Brazil. The differed significantly. luetkenii occupied mainly uppermost stratum, with 79% within 20 cm surface; whereas more common between 40 below surface (55% observations). Predation pressure, macrophyte cover nutrient distribution may influence this vertical segregation.
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