Preliminary report from the sea-going workshop in Norway June 1993 on intercomparison and evaluation of methods for sampling and determination of zooplankton distribution and biomass

• Main Authors: Skjoldal, Hein Rune, Wiebe, Peter H., Knutsen, Tor, Postel, Lutz
• Format: Report
• Language: English
• Published: ICES 1993
• Subjects: zooplankton; dyreplankton; distribution; utbredelse; biomass; biomasse; sampling; prøvetaking; VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497; VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452; Canada; Norway; Iceland
• Online Access: http://hdl.handle.net/11250/105196

A sea-going workshop was arranged from 2 to 13 June 1993 in Storfjorden at Møre on the west coast of Norway. The workshop was a two-ship operation involving the Norwegian R/V "Johan Hjort" and the German R/V "A.V. Humboldt". The principal objective was to intercom pare, characterize and evaluate the performance of gear and techniques for quantitative description of zooplankton distribution, biomass and production. During the last two days of the cruise, a seminar series of lectures was presented which highlighted various aspects of the sampling and samplers. A total number of 38 scientists and technicians from Canada, France, Germany, Iceland, Norway, Spain, United Kingdom and USA took part in the workshop and/ or the seminar. A wide range of sampling gears and instruments were deployed. These included BIONESS, MOCNESS (1 and 10 m2), LHPR, CPR, Gulf Ill, Optical Plankton Counter, and various other plankton nets and trawls. Sample treatment usually involved splitting the samples in two halves for determination of sizefractioned dry weight biomass and species enumeration, respectively. The dry weight biomass samples were worked up during the workshop and will form the principal material for the gear intercomparison. Acoustical registrations were made with Simrad EK500 eccho sounders operated at 4 frequencies (18, 38, 120, and 200 kHz). This report gives a brief description of the work carried out during the workshop and a few preliminary results. A full report describing the results from the workshop will be prepared and reviewed by the Study Group of Zooplankton Production.