New Zealand Journal of Marine and Freshwater Research abstracts

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A technique for separating and counting rock lobster eggs

BRUCE L. BYCROFT

Fisheries Research Centre Ministry of Agriculture and Fisheries P. O. Box 297, Wellington New Zealand

Abstract Eggs were separated from the setae of berried female rock lobsters (Jasus edwardsii) by soaking in 1 N KOH for 6-12 h. This technique separated almost all of the eggs from the setae and each other with minimal damage. An electronic egg-counter incorporating a phototransistor was used to count the eggs suspended in water. It had a high degree of accuracy (C.V.= 1.5%) when eggs were counted at a rate of about 200 000 per hour.

Keywords rock lobster eggs: Jasus edwardsii: separation; electronic counter; speed; accuracy

Mew Zealand Journal of Marine and Freshwater Research, 1986. Vol. 20: 623-626 Received 2 December 1985; accepted 14 March 1986

PDF file of entire paper: medium quality (576K); (scanned from paper original: notes about this process)

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