New Zealand Journal of Marine and Freshwater Research abstracts
Measuring depth of settlement in the red rock lobster, Jasus edwardsii
JOHN D. BOOTH
MAF Fisheries
Ministry of Agriculture and Fisheries
P. O. Box 297, Wellington, New Zealand
ANDREW D. CARRUTHERS
Late of 5 Surrey Street Taradale, New Zealand
COLIN D. BOLT
42 Curtis Street Wellington, New Zealand
ROBERT A. STEWART
MAF Fisheries
Ministry of Agriculture and Fisheries
P. O. Box 297, Wellington, New Zealand
Abstract
Settlement of the puerulus stage of
Jasus edwardsii (Decapoda: Palinuridae) near the shore takes place over a wide depth range. It occurs intertidally, and, as determined by crevice collectors, also takes place down to depths of at least 50 m. At sites along the east coast of the North Island of New Zealand, depth of greatest settlement found on collectors varied with locality and time, but was within the upper 11.5 m. Surface-buoyed collectors caught fewer animals than did collectors at greater depths. Settlement levels generally increased with depth to about 10-12 m, then decreased with increasing depth and distance from shore. The ability of/,
edwardsii to settle over a wide depth range may improve its chances of recruitment. A device (closing crevice collector) for measuring puerulus settlement of/,
edwardsii at depth is described.
Keywords rock lobster; Jasus edwardsii; Palinuridae; New Zealand; puerulus; settlement; larval recruitment
New Zealand Journal of Marine and Freshwater Research, 1991, Vol. 25:123-132 0028-8330/2502-0123 $2.50/0 © Crown copyright 1991
Received 21 March 1990; accepted 30 April 1991
PDF file of entire paper: medium quality (1150K); (scanned from paper original: notes about this process)
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