New Zealand Journal of Marine and Freshwater Research abstracts

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Downstream migration of Geotria australis juveniles in the lower Waikato River (Note)

PERRY W. EMPSON*

ADRIAN S. MEREDITH*

Freshwater Fisheries Research Centre Ministry of Agriculture and Fisheries P.O. Box 951, Rotorua, New Zealand

Abstract Juvenile migrants of Geotria australis were caught from July to early August 1986 in plankton nets set in the lower Waikato River. Migration occurred only at night and mainly mid-river at the surface. The mean lengths and weights ( + 95%c.i.) were 107.75 + 3.98 mm and 0.94 + 0.08 g respectively.

Keywords lamprey; Geotria australis; migrants; juveniles; lower Waikato River; New Zealand

New Zealand Journal of Marine and Freshwater Research, 1987, Vol. 21: 643-644 0028-8330/87/2104-0643$2.50/0 © Crown copyright 1987 Received 20 February 1987; accepted 21 April 1987

PDF file of entire paper: medium quality (133K); (scanned from paper original: notes about this process)

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