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Ontogenetic changes in the diet of the black-stripe minnow Galaxiella nigrostriata (Shipway, 1953) (Galaxiidae) and the salamanderfish Lepidogalaxias salamandroides (Mees, 1961) (Lepidogalaxiidae)

Gill, H.S. and Morgan, D.L. (2003) Ontogenetic changes in the diet of the black-stripe minnow Galaxiella nigrostriata (Shipway, 1953) (Galaxiidae) and the salamanderfish Lepidogalaxias salamandroides (Mees, 1961) (Lepidogalaxiidae). Ecology of Freshwater Fish, 12 (2). pp. 151-158.

Link to Published Version: http://dx.doi.org/10.1034/j.1600-0633.2003.00012.x
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Abstract

Similarities in the diets of larval, juvenile and adult black-stripe minnow (Galaxiella nigrostriata) and salamanderfish (Lepidogalaxias salamandroides), collected from ephemeral pools in south-western Australia during the mid-wet, late-wet and dry seasons, were assessed. During the mid-wet season, both intra- and interspecific competition for a diminishing food supply was minimised through differences in prey utilisation by the various developmental stages of both species. During the late-wet season, the pools contained only juvenile G. nigrostriata and juvenile and adult L. salamandroides, the diets of which were vastly different. A shift towards terrestrial fauna by G. nigrostriata and the ingestion of greater proportions of larger benthic prey taxa by L. salamandroides minimised interspecific competition for food at a time when densities of zooplanktors were rapidly declining. Timing differences in the onset of aestivation ensures that no interspecific competition for food occurs during the dry season.

Item Type: Journal Article
Murdoch Affiliation(s): Centre for Fish and Fisheries Research
School of Biological Sciences and Biotechnology
Publisher: Blackwell Publishing Inc.
Copyright: 2003 Blackwell Munksgaard
URI: http://researchrepository.murdoch.edu.au/id/eprint/5777
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