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| Registros recuperados: 28 | |
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| Alfnes, Frode; Steine, Gro. |
| We conduct a within-sample test of hypothetical bias and parameter equality between a hypothetical stated choice (SC) experiment using pictures and a real choice (RC) experiments using products. With exception of the none-of-these alternative-specific dummy, we cannot reject parameter equality between the two datasets. However, when we estimate the models separately with no parameter restrictions, the SC experiment gave WTP estimates that were approximately 50 percent higher and marginal WTP estimates that were almost two times as high as the corresponding estimates from the RC experiment. However, even though the monetary value of the WTP disparity was large, the disparity between the WTP estimates from the two data sets was not statistically significant. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Choice experiment; Hypothetical bias; Color; Mixed logit; Salmon; Willingness to pay; Consumer/Household Economics; C81; C93; D12; Q22. |
| Ano: 2005 |
URL: http://purl.umn.edu/24761 |
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| Babcock, Bruce A.; Weninger, Quinn. |
| Declining salmon prices, due primarily to expansion of farmed salmon production, have reduced revenues for Alaska's wild salmon fisheries by roughly 62 percent over the past 10 years. One possibility for reversing this trend is to differentiate wild and farmed salmon in consumer markets through quality improvements and marketing. We use a simple conceptual model to highlight the challenges that Alaska's wild salmon industry must overcome before the industry is likely to see significant revenue gains from increased quality. Our tentative conclusion is that product differentiation could increase profits for wild salmon. However, implementation may require significant departures from traditional production and management practices and possibly an amendment to... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Product differentiation; Salmon; Quality assurance; Resource /Energy Economics and Policy. |
| Ano: 2004 |
URL: http://purl.umn.edu/18469 |
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| Castro Sánchez,Rodrigo; Bustos Obregón,Eduardo; Rojas Rauco,Mariana. |
| Vertebral Column Deformity (VCD) is a common pathology in Chilean salmon farms, lowering the quality and commercialization of the product. Hypoxia has been related to other musculoskeletal deformities, but not to VCD. This work analyzes the morphology of the vertebral column of Salmo salar alevins, cultured under hypoxic conditions (60% O2 saturation in the water tanks) for different time periods after hatching (2, 4, 6 and 8 days). They are compared with their normoxic controls (100% O2 saturation). Using histological (H/E), and morphometric techniques, it was found that the time of exposure to hypoxia is inversely proportional to the body length, notochordal diameter and thickness of its sheath. The organic response to hypoxia was quantified by... |
| Tipo: Journal article |
Palavras-chave: Vertebral Column; Deformity; Hypoxia; Salmon. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000400036 |
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| Drakeford, Ben; Pascoe, Sean. |
| Intensive aquaculture, especially the production of carnivorous species, requires artificial feeding. Fishmeal and oil are preferred to vegetable proteins, since marine proteins provide the essential nutrients required by farmed fish. Therefore, given the stagnant production of reduction species and the rapid increase in aquaculture production, fishmeal availability would pose a biological constraint on aquaculture contribution to world fish supplies in the future, unless alternative feed sources can be incorporated in diets. In this paper, the technical substitutability between fish and vegetable based feeds are assessed through the estimation of Morishima elasticities of substitution. These are derived from a meta-analysis production function. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Fishmeal; Meta-analysis; Salmon; Trout; Elasticity; Livestock Production/Industries; Q2. |
| Ano: 2005 |
URL: http://purl.umn.edu/56074 |
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| Fofana, Abdulai; Jaffry, Shabbar. |
| This paper presents an investigation into the market structure for three product types of salmon (smoked, fresh and whole salmon) in the UK retail market. Evidence of the potential for market power and pricing conduct is analysed using structural simultaneous system equations based on the Bresnahan (1982) model. The importance of the retail market is recognised given the dominance of supermarket chains which accounted for £1.6 billion sales of seafood and the share of about 87% of all seafood retail sales in 2004 as compared with only 16% in 1988. The results indicate that the system is well represented by the models and that the market is competitive for fresh fillets and whole salmon but retailers exert some market power for smoked salmon. The hypothesis... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Market power; Error correction model; Dynamic demand systems; Salmon; Marketing; JEL-1; JEL-J. |
| Ano: 2006 |
URL: http://purl.umn.edu/45873 |
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| Fofana, Abdulai; Jaffry, Shabbar. |
| A significant increase of concentration in the UK salmon retail subsector has heightened concerns about retail firms’ ability to exercise market power in the purchase of supplies (oligopsony power). To assess the extent to which retail firms have exercised oligopsony power, we develop a dynamic error correction translog profit function to model the behaviour of retailers in the input market for smoke, fillet and whole salmon. Initial estimates indicated violations of monotonicity and convexity conditions as implied by economic theory. In order to ameliorate the problem, a Bayesian technique was used to impose inequality restrictions to correct the anomaly. The final estimated indices of market power in the models were low and statistically significant but... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Salmon; Market power; Error correction model; Translog profit function; Food Security and Poverty; JEL-I; JEL-J. |
| Ano: 2008 |
URL: http://purl.umn.edu/61116 |
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| Hanna, Susan S; Oregon State University; susan.hanna@oregonstate.edu. |
| Institutions are the mechanisms that integrate the human and ecological spheres. This paper discusses the institutional challenge of integrating salmon (Oncorhynchus spp.) ecosystems and human systems in ways that effectively promote resilience. Salmon recovery in the Columbia River Basin demonstrates the challenge. Despite the comprehensive scope of Basin salmon management, it has a number of problems that illustrate the difficulties of designing institutions for ecosystem and human system resilience. The critical elements of salmon ecosystem management are incentives and transaction costs, and these comprise a large piece of missing institutional infrastructure. Once the focus is placed on incentives and costs, a number of different management strategies... |
| Tipo: Peer-Reviewed Synthesis |
Palavras-chave: Columbia River Basin; Ecosystems; Human systems; Incentives; Institutions; Resilience; Salmon; Transaction costs. |
| Ano: 2008 |
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| Housty, William G.; Coastwatch Director, QQS Projects Society; william.housty@gmail.com; Noson, Anna; Division of Biological Sciences, University of Montana;; Scoville, Gerald W.; Department of Biological Sciences, Central Washington University;; Boulanger, John; Integrated Ecological Research;; Jeo, Richard M.; The Nature Conservancy; rjeo@tnc.org; Darimont, Chris T.; Department of Geography, University of Victoria; Raincoast Conservation Foundation;; Filardi, Christopher E.; Center for Biodiversity and Conservation, American Museum of Natural History ; filardi@amnh.org. |
| Guided by deeply held cultural values, First Nations in Canada are rapidly regaining legal authority to manage natural resources. We present a research collaboration among academics, tribal government, provincial and federal government, resource managers, conservation practitioners, and community leaders supporting First Nation resource authority and stewardship. First, we present results from a molecular genetics study of grizzly bears inhabiting an important conservation area within the territory of the Heiltsuk First Nation in coastal British Columbia. Noninvasive hair sampling occurred between 2006 and 2009 in the Koeye watershed, a stronghold for grizzly bears, salmon, and Heiltsuk people. Molecular demographic analyses revealed a regionally... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Bear population monitoring; British Columbia; Conservation; First Nations science; Grizzly bear; Noninvasive mark-recapture; Salmon; Social and ecological resilience; Traditional stewardship; Values. |
| Ano: 2014 |
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| Mezzatesta, Mariano; Newburn, David A.; Brozovic, Nicholas. |
| Many rural landowners within the Western United States do not have access to a secure water supply provided by a major dam or an irrigation district. Such water users must rely instead on groundwater pumping and/or seasonal water flows from tributaries. Some of these agricultural producers choose to store winter stream flows from tributaries within onsite reservoirs to secure their spring/summer water needs. However, regulatory agencies have increased restrictions on surface water storage and diversions to improve instream flows for endangered salmon, thus reducing water security for many landowners not located along the main stem. The majority of salmon habitat is within the tributaries located throughout a watershed. Most research regarding instream... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Instream flow; Salmon; Endangered species; Water; Watershed; Environmental Economics and Policy. |
| Ano: 2010 |
URL: http://purl.umn.edu/61485 |
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| Registros recuperados: 28 | |
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