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Z1/Z4 Zooplankton Workshop in Norway

MAR-ECO, Mesozooplankton workshop. Photo: T. FalkenhaugThe third Z1/Z4 workshop on mesozooplankton was held 31 January – 5 February, 2005, in Norway at the Institute of Marine Research, Flødevigen Research Station (Arendal). 

Participants: Astthor Gislason (Marine Research Institute, Iceland), Georgyi Vinogradov (P.P.Shirshov Institute of Oceanology, Russian Academy of Sciences), Tone Falkenhaug (Institute of Marine Research, Norway)

Objectives:The main objective of the workshop was to continue the analysis of Multinet samples, collected along the Mid Atlantic Ridge on the RV G.O. Sars MAR-ECO cruise June/July 2004 (Leg1). It was also an aim to inter-calibrate methods for identification and enumeration, in order to secure a coherent and uniform processing of samples.

Results: The total mesozooplankton material (Multinet,180 µm) amounts to 67 samples from 11 stations between Iceland and the Azores. At each station 5 to 9 depth strata were sampled from surface down to 2500 m.

So far, stations north of, and within the area of Charlie Gibbs Fracture Zone (CGFZ) have been processed (approx. half of the samples, SS2 – SS36).

Zooplankton, belonging to twelve different taxa has, as far as possible, been identified down to species level. The most abundant and species rich group is the copepods, represented by 22 different genera so far. 13 species of amphipods, belonging to 10 different genera, has been identified and the number of species is increasing as the analysis proceeds. Some taxa, (Chaetognaths, Cnidaria and fish larvae), have been sorted out for later identification by experts.

The analysis of Multinet samples south of the CGFZ will be continued by our Russian colleague Georgyi Vinogradov (P.P.Shirshov Institute of Oceanology, Russian Academy of Sciences). Dr. Vinogradov is a guest scientist at IMR, Flødevigen Research Station, until 27 February.

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