Investigations of a stock assessment in brown shrimp (Crangon crangon) Part 2: Biomass model

Research output: Book/ReportReportProfessional

Abstract

The Ministry of Agriculture, Conservation and Food quality, Producer organisations of the Dutch shrimp fisheries and NGO’s (Stichting de Noordzee and Waddenvereniging) have underlined the importance of sustainable harvesting of brown shrimp in the North Sea and Wadden Sea. Also they would like the brown shrimp fishery to meet the conditions of an MSC (Marine Stewardship Council) certificate. The first principle that the shrimp fishery needs to fulfil in order to acquire an MSC-label states that the stock should not be overfished. The biomass dynamic model has been investigated. This model does not need demographic data and was used successfully in Northern shrimp (Pandalus borealis). The model only needs the total amount of shrimp landings and an index of catches per unit of effort (CPUE) to assess the stock. The main assumptions of the model are (1) the stock under study is a single stock and (2) the available index (CPUE, catch per unit of effort series) describes the trends in the population well. The main conclusion from the study is that the applicability of the biomass model for a reliable stock assessment of brown shrimp needs considerably more study and data collection.
Original languageEnglish
Place of PublicationIJmuiden
PublisherIMARES
Number of pages25
Publication statusPublished - 2010

Publication series

NameReport / IMARES Wageningen UR
PublisherIMARES
No.C072/10

Keywords

  • shellfish fisheries
  • shrimps
  • crangon
  • sustainability
  • fishery management
  • data collection

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