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Mice on menu: opportunistic feeding behaviour of the Amazonian silver arowana Osteoglossum bicirrhosum
Author(s) -
Verba Julia Tovar,
Lima de Oliveira Borges Manoela,
Ferreira da Silva Maria Nazareth,
Costa Pinto Lorena,
Rabello Neto José Gurgel
Publication year - 2018
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/jfb.13665
Subject(s) - biology , amazonian , predation , fish <actinopterygii> , amazon rainforest , nutrient , zoology , ecology , fishery
Two silver arowana, Osteoglossum bicirrhosum , one male (49.5 cm standard length, L S ) and one female (52.5 cm L S ) that had fed on small‐eared colilargo or small‐eared pygmy rice rat Oligoryzomys microtis , were sampled during the rising water period in the Brazilian Amazon. The identified prey were 6 and 8 cm long and occupied the entire stomachs of both individuals. This opportunistic feeding behaviour appears to be a strategy for this fish to acquire nutrients during times when its usual aquatic prey is dispersed throughout the flooded forest.