A Multi-species Model for Fish and Marine Mammals in the Barents Sea

Bogstad, Bjarte; Hauge, Kjellrun Hiis; Ulltang, Øyvind

doi:10.2960/j.v22.a23

Cited by 86 publications

(65 citation statements)

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“…The Northeast Atlantic cod (Gadus morhua) has its main spawning grounds on the coastal banks of Norway between 62º and 70º N and return to the Barents 2 fish stocks as well as marine mammals and birds (Bogstad et al, 1997). Recruitment of cod and herring is enhanced by inflows of Atlantic water carrying large amounts of suitable food for larvae and fry of these species.…”

Section: Stock Developmentmentioning

confidence: 99%

Cooperative and non-cooperative management of the Northeast Atlantic cod fishery

Bjørndal

Lindroos

2011

J Bioecon

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Overfishing of quotas has been a concern for a number of years. The purpose of this article is to analyse cooperative and non-cooperative management of the Northeast Atlantic cod fishery. This will be done in a game theoretic context, based on different assumptions regarding important variables such as cost of effort and initial stock size. The game theoretic analysis will be based on an empirical bioeconomic model developed and estimated by Hannesson (2007Hannesson ( , 2010. The case of cooperative management is analysed for different cost parameters and starting values of the stock. An interesting result is that the optimal policy gives rise to pulse fishing. As this involves effort (and harvests) varying from year to year, potentially imposing substantial social costs on the industry in years when the fishery is closed, a policy of constant effort is also considered. Finally, non-cooperative management is analysed.

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Section: Stock Developmentmentioning

confidence: 99%

Cooperative and non-cooperative management of the Northeast Atlantic cod fishery

Bjørndal

Lindroos

2011

J Bioecon

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“…Capelin is also potentially the largest stock in the world (Gjøsaeter, 1998;Gjøsaeter & Bogstad, 1998) and is of crucial importance as a prey for the growth of juvenile cod (Dalpadado & Bogstad, 2004;Hamre, 2003). The relationship between these two species is highly dynamic and is essential in the Barents Sea ecosystem (Bogstad, et al, 1997).…”

Section: Application In Cod and Capelin Species In Barents Seamentioning

confidence: 99%

“…The earlier studies focused mainly on a predator-prey relationship on different trophic levels in their multispecies management model (for example Bogstad et al, 1997;May, et al, 1979;Yodzis, 1994). Those studies, however, focused on the biological yields without considering the economic aspects of harvesting.…”

Section: Introductionmentioning

confidence: 99%

Do Species Interactions and Stochasticity Matter to Optimal Management of Multispecies Fisheries?

Poudel¹,

Sandal²,

Steinshamn³

et al. 2012

Global Progress in Ecosystem-Based Fisheries Management

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“…Cod, capelin, herring, harp seals and minke whales are distributed over the seven areas used in previous studies (Bogstad et al 1997) plus a residual area (Figure 1), and over age and month. Fish are also distributed over lengths.…”

Section: Overviewmentioning

confidence: 99%

“…Monthly age-dependent transition matrices between areas (migration matrices) based on survey data were developed by Bogstad et al (1997). The stationary distributions related to these matrices are used to distribute the various populations over areas, by month and age.…”

Section: Migration and Monthly Dynamicsmentioning

confidence: 99%

The Scenario Barents Sea study: a case of minimal realistic modelling to compare management strategies for marine ecosystems

Schweder

2006

Top Predators in Marine Ecosystems

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Management of a marine ecosystem is regarded as a game played by the Government Agency against Nature. The quality of the management strategy is evaluated using models for the strategy taken by Nature. These models should be sufficiently realistic and also practical to implement and investigate on a computer. Whaling and sealing in the Barents Sea are of little economic interest of themselves, but might impact some other fisheries positively. Our model to evaluate strategies for whaling and sealing includes cod, herring, capelin, harp seals and minke whales, and emphasizes interactions between these populations caused by predation. For proposed management strategies, the stochastic system is repeatedly simulated over 100 years, and the strategies are evaluated by the resulting cod, capelin and herring TACs that are calculated from fixed rules. Our line of study was first pursued in the 1990s with an emphasis on management strategies for cod, herring and minke whales. It is now extended and refined with harp seals included, and with improved modelling of how predation mortality in the fish species is non-linearly linked to the abundances of all the modelled species.

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A Multi-species Model for Fish and Marine Mammals in the Barents Sea

Cited by 86 publications

References 1 publication

Cooperative and non-cooperative management of the Northeast Atlantic cod fishery

Cooperative and non-cooperative management of the Northeast Atlantic cod fishery

Do Species Interactions and Stochasticity Matter to Optimal Management of Multispecies Fisheries?

The Scenario Barents Sea study: a case of minimal realistic modelling to compare management strategies for marine ecosystems

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