University of Tasmania
Browse

File(s) not publicly available

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

journal contribution
posted on 2023-05-16, 12:19 authored by Jackson, GD, Shaw, AGP, Lalas, C
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.

History

Publication title

Polar Biology

Volume

23

Issue

10

Pagination

699-705

ISSN

0722-4060

Department/School

Institute for Marine and Antarctic Studies

Publisher

Springer-Verlag

Place of publication

New York

Repository Status

  • Restricted

Socio-economic Objectives

Fisheries - wild caught not elsewhere classified

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC