Diets of alpine galaxias (Galaxias paucispondylusStokell) and longjawed galaxias (G. prognathusStokell) in a South Island, New Zealand, high‐country stream
- 1 December 1989
- journal article
- research article
- Published by Taylor & Francis in New Zealand Journal of Marine and Freshwater Research
- Vol. 23 (4) , 453-458
- https://doi.org/10.1080/00288330.1989.9516381
Abstract
Thedietsofthealpinegalaxias(Galaxias paucispondylus Stokell, 1938) and the longjawed galaxias (G. prognathus Stokell, 1940) were studied in Deep Creek, a high‐country stream in the central South Island of New Zealand. Both species are small, slender fish with entirely freshwater life cycles. Their diets were very similar and consisted of aquatic invertebrates, dominated by the larvae of Deleatidium spp. (Ephemeroptera), Hydrobiosis spp. (Trichoptera), and Chironomidae (Diptera). Although diets partly reflected what was available in the stream, both fish selected soft‐bodied prey in preference to cased or harder shelled prey. Both species are probably nocturnal feeders.Keywords
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