菜单上的老鼠：亚马逊银龙鱼（骨舌鱼）的机会主义摄食行为

Mice on menu: opportunistic feeding behaviour of the Amazonian silver arowana Osteoglossum bicirrhosum.

作者信息

Verba Julia Tovar, Lima de Oliveira Borges Manoela, Ferreira da Silva Maria Nazareth, Costa Pinto Lorena, Rabello Neto José Gurgel

机构信息

Department of Ecology, Bioscience Centre, Federal University of Rio Grande do Norte, Natal, Brazil.

Biological Dynamics of Forest Fragments Project, National Institute of Amazonian Research, Manaus, Brazil.

出版信息

J Fish Biol. 2018 Jul;93(1):132-133. doi: 10.1111/jfb.13665.

DOI:10.1111/jfb.13665

PMID:29934944

Abstract

Two silver arowana, Osteoglossum bicirrhosum, one male (49.5 cm standard length, L ) and one female (52.5 cm L ) 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.

摘要

两条双须骨舌鱼（Osteoglossum bicirrhosum），一雄（标准体长49.5厘米）一雌（体长52.5厘米），它们以小耳稻鼠（Oligoryzomys microtis）为食，在巴西亚马逊河涨水期被采样。所识别出的猎物长6至8厘米，占据了两条鱼的整个胃部。这种机会主义摄食行为似乎是这种鱼在其通常的水生猎物分散于被洪水淹没的森林各处时获取营养的一种策略。