Blar i forfatter "Eide, Arne"

Viser treff 1-20 av 21

    • Are Asian fresh and brackish water aquaculture production vulnerable or resilient towards climate change impacts? 

      Nadarajah, Suthamathy; Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-18)
      This study analyzes fresh and brackish water aquacultures—especially carp, tilapia, and shrimp production—in major Asian aquaculture-producing countries. Different indicators have been used, involving dimensions that may be affected by climate change. High diversity is believed to indicate high adaption capacity, while resilience is estimated by known biological properties of each species. The results ...

    • A bioeconomic MPA study based on cellular automata population growth and distribution 

      Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      This paper investigates possible biological and economic effects of using marine sanctuaries as a management tool, employing cellular automata techniques to model biological growth and area distribution, assuming open access to the fish stock resources outside the protected area. The cellular automata model incorporates a fish harvest model based on standard assumptions. In agreement with previous ...

    • A bioeconomic perspective on the Norwegian Barents Sea cod fishery 

      Eide, Arne (Doctoral thesis; Doktorgradsavhandling, 2008-11-14)

    • Causes and consequences of fleet diversity in fisheries: The case of the Norwegian Barents Sea cod fishery 

      Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-25)
      Fisheries operate under fluctuating environmental conditions, targeting fish stocks that appear in varying densities in different areas, often with abrupt and unexpected local changes. Physical conditions, markets and management regulations constrain vessels in different and varying ways. These factors all contribute to forming the fleet diversity we find in most fisheries. Here, a simulation model ...

    • Climate change, fisheries management and fishing aptitude affecting spatial and temporal distributions of the Barents Sea cod fishery 

      Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-26)
      Climate change is expected to influence spatial and temporal distributions of fish stocks. The aim of this paper is to compare climate change impact on a fishery with other factors impacting the performance of fishing fleets. The fishery in question is the Northeast Arctic cod fishery, a well-documented fishery where data on spatial and temporal distributions are available. A cellular automata ...

    • Determinants of inefficiency in shrimp aquaculture under environmental impacts: Comparing shrimp production systems in the Mekong, Vietnam 

      Le, Thi Thanh Ngan; Brækkan, Eivind Hestvik; Armstrong, Claire W.; Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-26)
      Shrimp aquaculture systems vary from primitive (extensive/ improved extensive) to more industrialized (intensive/semiintensive) farms, and the impacts of environmental shocks may differ between them. This article applies the Cobb– Douglas stochastic production frontier function to evaluate the determinants that impact the inefficiency of these intensive and extensive systems in Vietnam. Data ...

    • Economic Impacts of Global Warming : The Case of the Barents Sea Fisheries 

      Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2007)
      Regional analyses of possible physical and biological effects of global warming in the Barents Sea area have been carried out recently. Based on such studies possible economic impacts of global warming on the Barents Sea fisheries have been quantified, assuming different types of management regimes. The EconSimp2000 model, consisting of the ecosystem model AggMult and the fleet model EconMult have ...

    • Economic performance and capacity utilisation in vietnamese purse seine fishery 

      Cao, Thi Hong Nga; Eide, Arne; Armstrong, Claire W.; Long, Le Kim (Journal article; Tidsskriftartikkel; Peer reviewed, 2020)
      This study identifies differences in vessel efficiency amongst purse seiners in Vietnamese fishery. Deterministic data envelopment analysis (DEA) was used to assess relative capacity utilisation of each vessel, and double bootstrap DEA was adopted to overcome some of the drawbacks of nonparametric DEA. The study was based on a survey of costs and earnings from 52 purse seiners in 2016, revealing ...

    • Environmental constraints, biological growth and fleet dynamics of a developing fishery: A model study of the Barents Sea snow crab (Chionoecetes opilio, Majidae) fishery 

      Hogrenning, Egil; Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-07)
      The snow crab (Chionoecetes opilio, Majidae) has recently entered the Barents Sea, and a crab fishery is developing. Information on how the crab appeared and where it is moving is limited. We study how the characteristics of the fleet may affect the further development of the fishery. A spatial model is constructed as a grid of cells given a carrying capacity for crab determined by environmental ...

    • Fisheries Management and Global Warming. Effects of climate change on fisheries in the Arctic region of the Nordic countries. 

      Eide, Arne; Ese, Ann-Christin; Hoel, Alf Håkon (Research report; Forskningsrapport, 2014)

    • Harvest control rules in modern fisheries management 

      Kvamsdal, Sturla F; Eide, Arne; Ekerhovd, Nils-Arne; Enberg, Katja; Gudmundsdottir, Asta; Hoel, Alf Håkon; Mills, Katherine E.; Mueter, Franz J.; Ravn-Jonsen, Lars; Sandal, Leif Kristoffer; Stiansen, Jan Erik; Vestergaard, Niels (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-07-20)
      Harvest control rules have become an important tool in modern fisheries management, and are increasingly adopted to provide continuity in management practices, to deal with uncertainty and ecosystem considerations, and to relieve management decisions from short-term political pressure. We provide the conceptual and institutional background for harvest control rules, a discussion of the structure of ...

    • Individual quotas and revenue risk of fishing portfolio in the trawl fishery 

      Alizadeh, Tannaz; Syed, Shaheen; Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-03)
      The Norwegian bottom-trawl fleet is managed through individual vessel quotas and is generally engaged in codfish fisheries, where several species contribute to the revenue of the fishery. The revenue from the fishing exhibits substantial intra-annual variation and carries a significant degree of risk due to the presence of intrinsic volatilities in the marine environment, such as seasonal fluctuations ...

    • Maximum Yield Fishing and Optimal Fleet Composition. A Stage Structured Model Analysis With an Example From the Norwegian North-East Arctic Cod Fishery 

      Helgesen, Irmelin Slettemoen; Skonhoft, Anders; Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-01)
      A stage structured fishery model with three stages; recruits, immature fish and mature fish is formulated and utilized to analyse maximum sustainable yield (MSY) and optimal harvesting composition in a fishery with two heterogeneous fleets. The stage structured model developed bundles the age classes found in age structured models into stage classes based on their level of maturity, but also the ...

    • Measuring capacity utilization in fisheries using physical or economic variables: A data envelope analysis of a Vietnamese purse seine fishery 

      Cao, Thi Hong Nga; Eide, Arne; Armstrong, Claire W.; Long, Le Kim (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-26)
      Data Envelopment Analysis (DEA) studies of fisheries usually apply output oriented capacity utilization based on physical measures. Although physical measures capture important input factors employed in fishing activities (such as boat size, engine power), economic measures directly reflect the cost of inputs employed. This case study investigates whether economic measures are vital or whether ...

    • The Ocean 

      Hoegh-Guldberg, Ove; Cai, Rongshuo; Poloczanska, Elvira S.; Brewer, Peter G.; Sundby, Svein; Hilmi, Karim; Fabry, Victoria J.; Jung, Sukgeun; Skirving, William; Stone, Dáithí A.; Burrows, Michael T.; Bell, Johann; Cao, Long; Donner, Simon; Eakin, C. Mark; Eide, Arne; Halpern, Benjamin S.; McClain, Charles R.; O’Connor, Mary I.; Parmesan, Camille; Perry, R. Ian; Richardson, Anthony J.; Brown, Christopher J.; Schoeman, David; Signorini, Sergio R.; Sydeman, William J.; Zhang, Rui; van Hooidonk, Ruben; McKinnell, Stewart M. (Research report; Forskningsrapport, 2014)

    • Optimal Selection and Effort in a Fishery on a Stock with Cannibalistic Behaviour : The Case of the Northeast Arctic Cod Fisheries 

      Eide, Arne; Wikan, Arild (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)
      We explore a fishery targeting the mature part of a stock, while bycatching the immature part. Both targeted catch and bycatch may have positive market values. Cost of effort is supposed to be a function of the selection properties of the fishing gears. Mature fish is assumed to cannibalise on the immature part of the stock. A bioeconomic model of the problem is set up and it is shown that the model ...

    • A participatory scenario method to explore the future of marine social‐ecological systems 

      Planque, Benjamin; Mullon, Christian; Arneberg, Per; Eide, Arne; Fromentin, Jean-Marc; Heymans, Johanna J; Hoel, Alf Håkon; Niiranen, Susa; Ottersen, Geir; Sandø, Anne Britt; Sommerkorn, Martin; Thébaud, Olivier; Thorvik, Thorbjørn (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-01)
      Anticipating future changes in marine social‐ecological systems (MSES) several decades into the future is essential in the context of accelerating global change. This is challenging in situations where actors do not share common understandings, practices, or visions about the future. We introduce a dedicated scenario method for the development of MSES scenarios in a participatory context. The objective ...

    • Rebuilding the Northeast Arctic Cod Fisheries - Economic and Social Issues 

      Armstrong, Claire W.; Eide, Arne; Flaaten, Ola; Heen, Knut; Kaspersen, Inga Wigdahl (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      The Northeast Arctic cod (NEA cod) fisheries in Norway are now one of the richest cod fisheries in the world. In the past the fishery has experienced several stock declines and low economic returns. In this paper we review management approaches applied over 20 years to address one of the most severe crises in the fishery. Emphasis is on management strategies and the measures carried out to ensure ...

    • Seafood from a changing Arctic 

      Troell, Max; Eide, Arne; Isaksen, John Roald; Hermansen, Øystein; Crépin, Anne-Sophie (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-27)
      We review current knowledge about climate change impacts on Arctic seafood production. Large-scale changes in the Arctic marine food web can be expected for the next 40–100 years. Possible future trajectories under climate change for Arctic capture fisheries anticipate the movement of aquatic species into new waters and changed the dynamics of existing species. Negative consequences are ...

    • Spatial and temporal distributions in the Norwegian cod fishery 

      Ashrafi, Tannaz Alizadeh; Eide, Arne; Hermansen, Øystein (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-25)
      Fisheries are characterized by variations in space and time. This study investigates the characteristics of seasonality in cod trawl fisheries in two distinct areas: the coast along the northern Norway and the high sea area of the Barents Sea. Catch per unit effort (CPUE) is used to proxy variation in stock abundance. A CPUE function has been estimated in the frequency‐domain framework, to detect ...