Emigrating larvae of koaro,Galaxias brevipinnisGünther (Teleostei: Galaxiidae), from the Otira River, New Zealand
作者:
R. M. McDowall,
A. M. Suren,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1995)
卷期:
Volume 29,
issue 2
页码: 271-275
ISSN:0028-8330
年代: 1995
DOI:10.1080/00288330.1995.9516660
出版商: Taylor & Francis Group
关键词: koaro;Galaxias brevipinnis;life history;larva;migration;diadromy
数据来源: Taylor
摘要:
Fish larvae were collected in stream benthic invertebrate drift nets from the Otira River, near Arthur's Pass, New Zealand during a study of benthic drift. They are identified as probably those of koaro (Galaxias brevipinnisGunther) on the basis of estimates of myomere counts (indicating Galaxiidae or Retropinnidae); by a process of elimination of likely species on the basis of distance up stream, elevation, and habitat characteristics; and by determining fish species in the Otira River tributaries upstream of the sampling location. This comprises the first likely record of emigrating larvae of koaro, a species known to be diadromous by the return migrations from the sea of whitebait juveniles during spring. A newly hatched larva of koaro is described and figured.
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