New Zealand Journal of Marine and Freshwater Research abstracts

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Distribution of zooplankton off Westland, New Zealand, June 1979 and February 1982

J. M. BRADFORD

New Zealand Oceanographic Institute Division of Marine and Freshwater Science Department of Scientific and Industrial Research P. O. Box 12-346, Wellington North New Zealand

Abstract Oceanic zooplankton concentrations and populations, off Westland, New Zealand sampled in June 1979 and February 1982, were found to be generally typical of those for subtropical regions. The most abundant coastal species were the copepods Oithona similis, Acartia ensifera, Par-acalanus indicus, and Centropages aucklandicus, and the euphausiid Nyctiphanes australis; the copepod Clausocalanus pergens was abundant in June 1979. Advective processes appear to play an important role on this coast. They are apparently responsible for (1) introducing larger zooplankton biomass (in the form of Salpa fusiformis) into the area than can be supported by the observed phy-toplankton concentrations, (2) particular distributions of oceanic surface copepods species in June 1979, and (3) reduction in the concentrations of some neritic species off Wanganui Bluff.

Keywords zooplankton; distribution; wet weight; numbers; southwest Pacific; New Zealand coast; Westland; advection

New Zealand Journal of Marine and Freshwater Research, 1985, Vol. 19: 311-326 Received 19 September 1984; accepted 16 November 1984

PDF file of entire paper: medium quality (1051K); (scanned from paper original: notes about this process)

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