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Survey Reports - 2010

Nr. 2: Distribution and abundance of Norwegian spring spawning herring larvae on the Norwegian shelf in April 2010

The objectives of this survey were to map the distribution of herring larvae and other fish larvae on the Norwegian shelf and to collect data on hydrography, nutrients, chlorophyll and zooplankton. The data are used to calculate an index of the abundance of herring larvae which is used by the ICES Working Group on Widely Distributed Species (WGWIDE ) in the assessment of Norwegian spring spawning herring. The index is used as tuning index for the size of the spawning stock and is part of a time series which started in 1981. An additional objective of the survey was to undertake process studies on herring larvae to map the small scale overlap between the larvae and their prey and predators using the MESSOR (towed Optical counter and plankton sampling) system and macroplankton trawl in selected areas.

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Nr. 7: Cruise report from the coordinated ecosystem survey in the Norwegian Sea and surrounding waters, 9 July- 20 August 2010

Main purpose: Study abundance, spatiotemporal distribution, aggregation and feeding ecology of Northeast Atlantic mackerel, Norwegian spring-spawning herring, blue whiting and other pelagic species in relation to oceanographic conditions, prey communities and marine mammals.

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Nr. 12 - 2010: Johan Hjort - Norw cruise report

In 2010, the Norwegian Institute of Marine Research (IMR) carried out the Norwegian part of the ICES co-ordinated herring and sprat acoustic survey for the North Sea and adjacent areas. This acoustic survey (HERAS) is planned and co-ordinated by the Working Group for International Pelagic Surveys (WGIPS 2010). Six countries cooperate in surveying the North Sea and Div. IIIa for an acoustic abundance estimation of herring and sprat.

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