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| Registros recuperados: 28 | |
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| Welch, Dw; Boehlert, Gw; Ward, Br. |
| For most of history, the ocean has remained nearly opaque to study, and it has been difficult to understand where salmon or other marine animals go or how they use the ocean. This greatly limits the ability of oceanographers and fisheries biologists to improve the management of many marine resources. The technical and scientific basis now exists to track the ocean movements of individual marine fish for months or years at a time. In this article, we review how new technologies might be applied to salmon in particular. Our conclusion is that animals as small as juvenile Pacific salmon can be followed for months to years at sea, and thus over great distances. By identifying the migration pathways for individual salmon and specific populations of Pacific... |
| Tipo: Text |
Palavras-chave: Salmon; Archival tags; Acoustic tags; Biotelemetry; Migration. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00322/43307/42967.pdf |
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| Venegas,Felipe; Montiel,Enrique; Forno,Pablo; Rojas,Mariana. |
| In adult salmon of the sea centres in southern Chile, a jaw deformation (JD) has been identified. It affects the dental and hyomandibular bones, which bend ventrally up to 90° of their normal position. The deformation affects also the dental articular bone. This pathology is related to weight loss and increased mortality of the salmons. It was empirically postulated that a probable cause for this anomaly was food from vegetal origin in the diet of the fishes (which are carnivores) Therefore, the present work aims at comparing the biostructure of jaw bone of salmons fed either with vegetal (soja and gluten) formulation or animal formulation, mostly fish powder. Fifty specimens were analyzed from Puerto Montt, 35 having JD and 15 normal control.... |
| Tipo: Journal article |
Palavras-chave: Jaw; Jaw deformation; Histology; Salmon; Salmo salar. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022003000300005 |
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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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| 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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| 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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| 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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| 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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| 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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