New Zealand Journal of Marine and Freshwater Research abstracts
Emigrating larvae of koaro, Galaxias brevipinnis Günther
(Teleostei: Galaxiidae), from the Otira River, New Zealand
R. M. McDOWALL
A. M. SUREN
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 8602
Christchurch, New Zealand
Abstract 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 brevipinnis Günther) 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.
Keywords koaro; Galaxias brevipinnis; life history;
larva; migration; diadromy
New Zealand Journal of Marine and Freshwater Research, 1995: Vol. 29:
271-275
0028-8330/95/2902-0271 $2.50/0 (c) The Royal Society of New Zealand
1995
Short communication
PDF file of entire paper: medium quality (387K); (scanned from paper original: notes about this process)
This year's abstracts |
Journal home page |
All abstracts |
Publishing home page
