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HAVBRUKS-Havbruk - en næring i vekst

The parasite fauna of wild and reared cod: transmission of parasites?

Awarded: NOK 1.5 mill.

Project Number:

172509

Application Type:

Project Period:

2006 - 2009

Location:

Parasites may move freely between fish hosts kept in net pens and surrounding wild fish stocks. The background prevalence and intensity of the different parasite species will determine the infection pressure on net-penned populations of naive juvenile fis h. Knowledge of the natural infection levels is furthermore essential for assessment of the transfer of parasites from a farm out into the environment. Cod farming is still in its infancy, thus it is still possible to assess natural background levels of p arasite infection. Such information is essential for the public management of marine farming activity. This project will conduct a parasite screening of three different fish host groups: Wild-caught cod for on-growing (WCC), Hatchery-reared cod (HRC) and Local wild cod (LWC). The potential for reciprocal interactions and transfers of parasites between these host groups will be examined at Øksfjord (Finnmark county). Additional sampling will be performed in the Oslo fjord (Akershus county), where there is no aquaculture activity. The examination of the fish will be done by the project staff, and local veterinarians. The second major goal of this project is the dissemination of knowledge on cod parasites. Findings will be presented through the "Sats på tors k" network primarily. Scientific articles on transfer of parasites into the cod pens, dissemination of parasites from cod farms to the environment, as well as papers in trade journals will be produced. Comparisons of parasite faunas within Norway and betw een Norway, Scotland and Canada are further anticipated outcomes of the project.

Funding scheme:

HAVBRUKS-Havbruk - en næring i vekst