El Niņo and the Peruvian Anchovy Fishery
This case study examines El Nino and its impact on the Peruvian anchovy fishery. Elements of meterology, physical oceanography, biology, ecology, economics and political science are involved in this broadly interdisciplinary module, which considers the social, as well as physical, changes brought about by changes in climate.
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The Finite Resource
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adult anchovies adult stock air-sea interactions anchovy stock annual catch anti-El Nino conditions assumed atmospheric circulation average biomass boats and fishmeal causes chovy circulation cell coast of Peru coastal upwelling coastline Coriolis force differential heating Earth equator equatorial Pacific equilibrium point euphotic zone Figure fish fish catch fisheries management fishing boats fishmeal plants flow global warming guano bird population harvest impact increase industry units Kelvin waves kilometers latitude lower sea levels maximum sustainable yield meters months natural mortality Nino cycle Nino events Ninos occurred Northern Hemisphere offshore open ocean Peruvian anchovy fishery photosynthesis phytoplankton poles poor recruitment predators protein random recruitment recruitment and natural reduced Rossby waves sardine Software South Equatorial Current Southern Oscillation Index spawning species strong El Nino surface currents surface winds sustainable catch tion tons of anchovies trade winds variability virgin stock Walker cell circulation westerlies western Pacific yield per recruit zero