New Zealand Journal of Marine and Freshwater Research abstracts

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Growth of two species of freshwater crayfish (Paranephrops spp.) in New Zealand

J. B. JONES

Fisheries Research Division, Ministry of Agriculture and Fisheries, P.O. Box 19062, Wellington, New Zealand

Abstract Populations of Paranephrops planifrons and P. zealandicus were reared in aquaria and their growth rates monitored. When reared in unheated aquaria (10-21 °c) P. planifrons grew to 20 mm orbit-carapace length in 12-18 months and P. zealandicus reached the same size in 9-10 months. This is faster, for both species, than in feral populations. When reared in an aquarium at 18-21 °C however, P. planifrons could be grown to 35 mm orbit-carapace length in 18 months. Mortality in both species was very high (60-93%).

Keywords Parastacidae; Paranephrops spp.; growth; aquaculture.

New Zealand Journal of Marine & Freshwater Research, 1981, 15(1): 15-20
Received 23 November 1979; revision received 23 October 1980

PDF file of entire paper: medium quality (416K); (scanned from paper original: notes about this process)

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