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Changes in a seafood market: substitution and elasticity of fish categories behavior in SE Brazil

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Abstract
  • Substitution and elasticity give about the history of supply and the demand structure for fish and seafood. It is also relevant to the detection of change in a particular exploited marine ecosystem. The purpose of this paper is to test if market elasticity of substitution of seafood categories can further elucidate on potential shifts in species composition of the Southeastern (SE) Brazil ecosystem. The paper is based on the hypothesis that seafood price can be elastic. In order to test such hypothesis, we used a time-series from the São Paulo city seafood wholesale market (1968-2007). A 97x97 matrix of linear correlation coefficients of market price and quantities between seafood categories based the analyses. Significant positive relations were found between some of the correlations. An elasticity analyses was run, and we show a case study of the category “sharks”. Inelasticity for income and elasticity of sharks categories, among others, reveals important considerations for management perspectives, such as the effect of possible conservation measures or ecosystem change.
  • Keywords: Modeling and Economic Theory, Posters, Fisheries Economics
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  • Pincinato, Ruth B. M. and Maria A. Gasalla. 2010. Changes in a seafood market: substitution and elasticity of fish categories behavior in SE Brazil. 6 pages. In: Proceedings of the Fifteenth Biennial Conference of the International Institute of Fisheries Economics & Trade, July 13-16, 2010, Montpellier, France: Economics of Fish Resources and Aquatic Ecosystems: Balancing Uses, Balancing Costs. Compiled by Ann L. Shriver. International Institute of Fisheries Economics & Trade, Corvallis, Oregon, USA, 2010.
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  • US National Oceanic and Atmospheric Administration (NOAA) Fisheries Division, Agence Française de Développement, Ministère de l’Enseignement Supérieur et de la Recherche, Ministère de L’Alimentation de L’Agriculture et de la Pêche, Ministère de l’Énergie, du Développement Durable et de la Mer, La Région Languedoc Rouslilon, Département Hérault, Montpellier Agglomèration, The Department of Fisheries and Oceans, Canada, and AquaFish Collaborative Research Support Program (CRSP).
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