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Distribution and biomass of two squid species off southern New Zealand: Nototodarus sloanii and Moroteuthis ingens

Citation

Jackson, GD and Shaw, AGP and Lalas, C, Distribution and biomass of two squid species off southern New Zealand: Nototodarus sloanii and Moroteuthis ingens, Polar Biology, 23, (10) pp. 699-705. ISSN 0722-4060 (2000) [Refereed Article]

DOI: doi:10.1007/s003000000141

Abstract

The distribution and biomass of two species of squid, the ommastrephid arrow squid Nototodarus sloanii and the onychoteuthid squid Moroteuthis ingens, were analysed off southern New Zealand. These two species are the most important and abundant species in this region of the South Pacific Ocean. Data were obtained from extensive NIWA research cruises over 10 years. There was a sharp demarcation between the distribution of the two species, with N. sloanii occurring predominantly shallower than 600 m, with the greatest biomass less than 300 m. In contrast, M. ingens had the highest biomass between 650 and 700 m and occurred down to 1400 m. The biomass of N. sloanii reached more than 3500 kg · km-2, with an average catch rate of over 186 kg · km-2. In contrast, the biomass of M. ingens was more than an order of magnitude less, with all catch weights less than 200 kg · km-2 and an average catch rate less than 17 kg · km-2. The separation of these two species appeared to be related to depth, temperature and, possibly, salinity. N. sloanii occurred predominantly in warmer, shallower subtropical waters while M. ingens occurred in deeper, cooler subantarctic and antarctic intermediate water masses. The Subtropical Front formed a major barrier between the distribution of these two squid species.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Fisheries - Wild Caught not elsewhere classified
Author:Jackson, GD (Dr George Jackson)
ID Code:19646
Year Published:2000
Web of Science® Times Cited:22
Deposited By:IASOS
Deposited On:2000-08-01
Last Modified:2011-08-04
Downloads:0

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