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Creator:: Steinshamn, Stein Ivar
Abstract:: A two-species bioeconomic model is analyzed, but in contrast to most similar models, there is no biological interaction between the species, only economic. The interaction takes place in the market where the quantity of either species may affect the price of the other. Both the sole-owner and the open access...
Resource Type:: Presentation
Full Text:: Presentasjon av Mat- og ressursøkonomi Stein Ivar

Creator:: Steinshamn, Stein Ivar
Abstract:: A generalization of the harvesting functions and the stock updating functions in age-structured bioeconomic models is outlined. Using this generalization everything from completely uniformly distributed fish to extreme schooling is taken care of. The classical Beverton-Holt model comes out as a special case of the generalized model. Both the theoretical...
Resource Type:: Research Paper
Full Text:: Montpellier Proceedings 1 GENERALIZATION OF AGE-STRUCTURED MODELS IN THEORY AND PRACTICE Stein Ivar

Creator:: Hannesson, Rognvaldur and Steinshamn, Stein Ivar
Abstract:: Present resource rents in Norway's fisheries were compared for different fleet structures. Alternative values of TACs were assumed, which is consistent with how most fisheries in Norwegian waters are managed. Total allowable catches (TACs) are set on the basis of advice by fisheries biologists where the economics of the industry...
Resource Type:: Research Paper
Full Text:: Author(s): Rognvaldur Hannesson , Stein Ivar Steinshamn Abstract: Present resource rents in

Creator:: Zimmermann, Fabian, Heino, Mikko, and Steinshamn, Stein Ivar
Abstract:: The individual size of fish as a proxy for life-history traits and market value displays an important, yet in bioeconomic modelling often ignored biological and economic parameter. This raises the question if and to what extent the consideration of a pricing related to the individual size influences optimal harvest strategies....
Resource Type:: Other
Full Text:: ) Stein Ivar Steinshamn, Center for Research in Economics and Business Administration (Norway

Creator:: Ekerhovd, Nils-Arne and Steinshamn, Stein Ivar
Abstract:: Optimal management of herring, mackerel, and blue whiting in the North East Atlantic is analyzed. The main motivation is to quantify the potential gain from implementing multi-species management compared to traditional single-species management. The objective is to maximize discounted net revenue; in other words a sole-owner perspective. The results are...
Resource Type:: Presentation
Full Text:: nilsarne.ekerhovd@snf.no Co-author Stein Ivar Steinshamn Department of Business and Management Science, Norwegian

Creator:: Ekerhovd, Nils-Arne and Steinshamm, Stein I.
Abstract:: In the North East Atlantic there are several straddling stocks, including herring, mackerel, and blue whiting, which are exploited both within coastal states' 200 nautical mile Exclusive Economic Zones (EEZ) and on the high seas. The pelagic fisheries of the North East Atlantic are all harvested by the same six...
Resource Type:: Presentation
Full Text:: Stein Ivar Steinshamn Model  Dynamic model with three interacting species and three agents on a

Creator:: Poudel, Diwakar
Abstract:: This study suggests an optimal harvest policy for Barents Sea species, namely Northeast Arctic Cod (Gadus morhua) and Capelin (Mallotus villosus) in the multispecies ecosystem. We have solved a multispecies age structured bioeconomic model for predator-prey interaction. Barents Sea stock data from ICES (International Council for the Exploration of the...
Resource Type:: Presentation
Full Text:: Bibliography Optimal Harvest in a Multi-species Age Structured Fishery Diwakar Poudel and Stein I Steinshamn

Creator:: Marsden, A. Dale and Sumaila, U. Rashid
Abstract:: We estimated the economic rent obtained currently (that is, in 2002) in the Namibian hake fishery and the rent that might potentially be obtainable if the fishery were managed optimally in the sense of economics. We first reviewed previous economic and biological studies. We then used the theory and model...
Resource Type:: Research Paper
Full Text:: , 187–201 Eburon, Delft, the Netherlands. [5] Eide, Arne, Peter Manning, and Stein Ivar Steinshamn

Creator:: Clay, Patricia M., Pinto da Silva, Patricia, and Kitts, Andrew
Abstract:: Catch share systems are being encouraged and considered in a variety of United States (U.S.) fisheries. Scientists, policy makers, and stakeholders (including fishermen and non-governmental environmental organizations) have different views about potential social and economic impacts and outcomes of these output- oriented systems. Thus identifying and evaluating impacts over time...
Resource Type:: Research Paper
Full Text:: , Gordon R. Munro, Sean Pascoe, Dale Squires, Stein Ivar Steinshamn, Bruce R. Turris, and Quinn Weninger

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