UNCOVER – Case study Barents Sea

Bjarte Bogstad,

IMR, Bergen, Norway

Participants

• IMR, Bergen, Norway

• PINRO, Murmansk, Russia

• University of Aberdeen, UK

• University of Bergen, Norway

• CEFAS, Lowestoft, UK

• IFM, Hirtshals, Denmark

• IIASA, Laxenburg, Austria

Species

• Cod

• Herring

• Capelin

Fish stock size in the Barents Sea

0

1

2

3

4

5

6

7

8

1973 1976 1979 1982 1985 1988 1991 1994 1997 2000 2003

Year

mill

. to

nn

es

Cod 3+

Capelin 1+

Herring 1+2

Catch of cod, capelin and herring

0

500

1000

1500

2000

2500

3000

1907 1915 1923 1931 1939 1947 1955 1963 1971 1979 1987 1995 2003

Year

10

00

ton

ne

s

Cod

Capelin

Herring

WP1

• Time series of total egg production for cod and herring (R. Nash)

• Maternal effects for herring (A. Geffen)• Fisheries induced evolution (U. Dieckmann)• Changes in herring distribution over 50 years (A.

Krysov)• IBM for migration of adult herring based on

behavioral model and 3D ocean models (G. Huse)

WP2

• Effect of climate on cod and herring recruitment (O. Titov)

• Life cycle strategy of cod (V. Tretyak)• Larval growth (A. Folkvord)• Cod recruitment forecast (O. Titov)• Process knowledge in IBMs (ECOBE) (Ø. Fiksen)• Recovery scenarios modelling first half year of

life (S. Sundby)

WP3

• Fit Gadget (IMR) and STOCOBAR (PINRO) to historical data (B. Bogstad/A. Filin)

• Description of temporal/spatial changes in predation by cod (A. Dolgov/B. Bogstad)

• Improve Gadget/STOCOBAR cod predation models (B. Bogstad/A. Filin)

• Note: Gadget model output from BECAUSE

WP4

• Identify data, information and models relevant to recovery questions (D. Howell/ Y. Kovalev/ T. Marshall)

• Develop operational framework (FEMS) modules accordingly (D. Howell/ Y. Kovalev/ T. Marshall/L. Kell)

WP5

• Interviews with stakeholders (D. Wilson)

• Describe compliance and legitimacy expectation (D. Wilson)

• Note that stakeholders are Nor-Russ. Fisheries Commission (cod, capelin) and Norway, Russia, Iceland, Faroes and EU (herring)