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| Registros recuperados: 62 | |
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| Poot-Lope, Gaspar Roman; Gasca-Leyva, Eucario. |
| In Mexico, the culture of tilapia has developed in rural areas, where the main problem is low producer income. The state of Yucatan also experiences this situation, and scarcity of money needed to purchase inputs results in complementary feeding with chaya (Cnidoscolus chayamansa), whose leaves are edible for humans and animals. In this situation, CINVESTAV conducted experiments to determine the optimal level of substitution of balanced feed with ray chaya leaves. The test with 25% and 50% reduced balanced feed complemented with chaya (ad libitum) did not show significant differences (P>0.05) in growth compared to fishes fed with a complete ration of balanced feed (100% feed table). A bioeconomic model was developed, including a submodel of growth... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Bioeconomic model; Cost minimization; Tilapia; Livestock Production/Industries; O13; Q22. |
| Ano: 2005 |
URL: http://purl.umn.edu/55999 |
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| Borsky, Stefan; Raschky, Paul A.. |
| This paper provides an empirical analysis of the role of intergovernmental relations on a country's effort to enforce the objectives of an international environmental agreement on an open access resource. Intergovernmental interaction allows signatory countries to observe compliance behavior of other signees and to punish non-compliance by applying bi- and multilateral sanctions. We use a cross-sectional dataset that contains country level information about compliance with Article 7 of the 1995 UN Code of Conduct for Responsible Fisheries. Our identification strategy combines a spatial autoregressive model with spatial autoregressive disturbances and an instrumental variable approach. We find a strong positive effect of other countries' compliance on the... |
| Tipo: Presentation |
Palavras-chave: International environmental agreements; Open access resources; Spatial econometrics; Environmental Economics and Policy; C21; F53; Q22. |
| Ano: 2012 |
URL: http://purl.umn.edu/124425 |
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| Polymeros, Konstantinos; Tsakiridou, Efthimia; Mattas, Konstadinos. |
| An attempt is made to evaluate the competitiveness of the fisheries and aquaculture industries of some Mediterranean countries. Revealed Comparative Advantage indices of Italian, French, Greek, Portuguese and Spanish fish products are estimated, in order to gain new insights regarding the position of these products in the market of the European Union, in terms of competitiveness. In addition, this study sheds light on the evolution of competitiveness over the last decade. The estimated Comparative Advantage indices reveal that there is a wide range of competitiveness among fish products in Mediterranean countries. In addition, almost all countries alter their competitive ranking throughout the study period. Consequently, Mediterranean fisheries and... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Competitiveness; Exports; Fish products; Mediterranean countries; Livestock Production/Industries; Q17; Q22; F14. |
| Ano: 2005 |
URL: http://purl.umn.edu/56004 |
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| Kristofersson, Dadi; Rickertsen, Kyrre. |
| Fishers in quota-regulated fisheries find it to their advantage to discard less valuable fish at sea to increase the value of their catch. A theoretical model describing the high-grading behavior of fishers is presented, and an empirical model is derived as well as a testing strategy to test for high-grading and to estimate the discarded amount of each grade. The model is applied to data for the Icelandic quota regulated cod fishery during the period September 1998 to June 2001. The results indicate that highgrading occurs in the Icelandic cod fishery for both long-line and net vessels. However, the discard rates are small, and the results clearly suggest that the ban on discards in Iceland has effectively dealt with high-grading. The estimated discard... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: ITQ's; Highgrading; Empirical estimation; Resource /Energy Economics and Policy; Q21; Q22; C12. |
| Ano: 2005 |
URL: http://purl.umn.edu/24722 |
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| Snyder, Lori D.; Stavins, Robert N.; Wagner, Alexander F.. |
| We develop and apply a new method for estimating the economic benefits of an environmental amenity. The method fits within the household production framework (Becker 1965), and is based upon the notion of estimating the derived demand for a privately traded option to utilize a freely-available public good. In particular, the demand for state fishing licenses is used to infer the benefits of recreational fishing. Using panel data on state fishing license sales and prices for the continental United States over a fifteen-year period, combined with data on substitute prices and demographic variables, a license demand function is estimated with instrumental variable procedures to allow for the potential endogeneity of administered prices. The econometric... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental Economics and Policy; Q26; Q21; Q22; H41. |
| Ano: 2003 |
URL: http://purl.umn.edu/10908 |
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| Sanchirico, James N.; Wilen, James E.. |
| This paper employs a spatial and intertemporal model of renewable resource exploitation to investigate the effects of marine reserve creation. The model combines the H. S. Gordon/Vernon Smith hypothesis of a rent dissipation process with Ricardian notions that resources are exploited across space in a pattern dependent upon relative profitabilities. The metapopulation model employed here incorporates modern biological ideas that stress patch heterogeneity, linkages, and dispersal processes between patches. The spatial bioeconomic model is then used to simulate the effects of reserve creation under various ecological structures. We find, under certain parameter configurations and ecological linkages, that there is potential for a "double-dividend" where... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Marine reserves; Spatial and intertemporal modeling; Bioeconomics; Resource /Energy Economics and Policy; C62; Q22; R10. |
| Ano: 1998 |
URL: http://purl.umn.edu/10715 |
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| Sanchirico, James N.; Wilen, James E.. |
| We present a bioeconomic model of a harvesting industry operating over a heterogeneous environment comprised of discrete biological populations interconnected by dispersal processes. The model generalizes the H. S. Gordon [1954]/V. Smith [1968] model of open-access rent dissipation by accounting for intertemporal and spatial "Ricardian" patterns of exploitation. This model yields a simple, but insightful, framework from which one can investigate factors that contribute to the evolution of resource exploitation patterns over space and time. For example, we find that exploitation patterns are driven by biological and fleet dispersal and biological and economic heterogeneity. We conclude that one cannot really understand the biological processes operating in... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Renewable resources; Bioeconomics; Spatial modeling; Metapopulation; Environmental Economics and Policy; Q22; R19. |
| Ano: 2000 |
URL: http://purl.umn.edu/10513 |
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| Lee, Min-Yang A.. |
| The effects of "localized depletion" of a pelagic fishery (herring) on a non-extractive marine activity (tourism) are investigated. Proponents of the localized depletion theory claim that intense fishing effort can lead to areas that are unsuitable for predators like tuna, groundfish, and whales. This leads to poor outcomes for the fishing and whale-watching industries. However, there has been no consensus in the scientific community about the existence of this phenomenon. Localized depletion would be consistent with an economic theory of joint production, in which nearshore herring stocks are an input in production of both herring and whale-watching trips. A unique dataset of daily whale-watching outcomes is combined with fishing effort and oceanographic... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Whales; Fishing; Panel data; Search; Ecosystem Based Management; Resource /Energy Economics and Policy; Q57; Q26; Q22. |
| Ano: 2008 |
URL: http://purl.umn.edu/6086 |
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| Registros recuperados: 62 | |
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