共查询到20条相似文献,搜索用时 125 毫秒
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The cod resources in the Barents Sea constitute the most important fisheries in Norway. In order to reduce resource allocation conflicts among different gear and vessel groups and to ensure profit for all participants throughout the value chain, the sector is thoroughly organized. The institutions established to ensure long-term sustainability, have been developed within the framework of a joint Norwegian–Russian fisheries management regime. However, due to a very high fishing mortality, the cod stock is now under severe pressure. In addition, a major part of the cod fisheries is highly seasonal and unable to be a stable supplier to neither the land-based industry nor demanding international markets. In parallel, cod farming is expected to become a new emerging industry, with potential to copy the success of farmed Atlantic salmon. Many actors within the cod fisheries fear the future competition from the growing cod farming sector. With reference to important attributes that characterize the cod fisheries and cod farming, this paper discusses how a future farming industry may affect the traditional cod fisheries. Moreover, we discuss how the fisheries may be forced to organize in the future to encounter the expected competition from cod farming. 相似文献
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Cheating about the cod 总被引:1,自引:0,他引:1
Rgnvaldur Hannesson 《Marine Policy》2007,31(6):698-705
The Northeast Arctic cod is managed by a total quota shared evenly between Norway and Russia. It appears that Russia has been overfishing its quota by substantial amounts for a number of years, due to insufficient monitoring of fishing vessels. This paper considers what would be the best reply by Norway to given levels of Russian overfishing. It is found that in most cases the best Norwegian reply would be also to overfish its quota. An aggregate biomass model with stochastic growth and recruitment is used to analyze this question, with parameters estimated from 1946 to 2005 data. Recruitment is serially correlated but apparently independent of the spawning stock. A model using the estimated serial correlation in recruitment and a random disturbance is capable of reproducing recruitment patterns similar to the irregular pattern observed since 1946. 相似文献
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North Sea cod recovery? 总被引:3,自引:3,他引:3
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Drift probabilities for Icelandic cod larvae 总被引:1,自引:0,他引:1
Brickman David; Marteinsdottir Gudrun; Logemann Kai; Harms Ingo H. 《ICES Journal of Marine Science》2007,64(1):49-59
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Ambient temperature and distribution of north-east Arctic cod 总被引:1,自引:1,他引:0
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Brooking Paul; Doucette Gino; Tinker Steve; Whoriskey Frederick G. 《ICES Journal of Marine Science》2006,63(7):1364-1371
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On the rational utilization of the Icelandic cod stock 总被引:1,自引:2,他引:1
Baldursson Fridrik M.; Danielsson Asgeir; Stefansson Gunnar 《ICES Journal of Marine Science》1996,53(4):643-658
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Sound from spawning cod at their spawning grounds 总被引:2,自引:0,他引:2
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Einar Svendsen Morten Skogen Paul Budgell Geir Huse Jan Erik Stiansen Bjrn dlandsvik Frode Vikeb Lars Asplin Svein Sundby 《Deep Sea Research Part II: Topical Studies in Oceanography》2007,54(23-26):2810
The Norwegian Ecological Model (NORWECOM) biophysical model system implemented with the ROMS ocean circulation model has been run to simulate conditions over the last 25 years for the North Atlantic. Modeled time series of water volume fluxes, primary production, and drift of cod larvae through their modeled ambient temperature fields have been analyzed in conjunction with VPA estimated time series of 3-year-old cod recruits in the Barents Sea. Individual time series account for less than 50% of the recruitment variability; however, a combination of simulated flow of Atlantic water into the Barents Sea and local primary production accounts for 70% of the variability with a 3-year lead. The associated regression predicts increased recruitment between 2007 and 2008 from about 450–700 million individuals with a standard error of nearly 150 million. 相似文献