994 resultados para historical images
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Contributed to: Fusion of Cultures: XXXVIII Annual Conference on Computer Applications and Quantitative Methods in Archaeology – CAA2010 (Granada, Spain, Apr 6-9, 2010)
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383 p. ; P.315-383: "Erauso Kateriñe" antzezlanaren edizioa dago.
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This short review includes major books, articles and episodes concerned with studies on inland waters that have affected the development of limnology in Argentina.
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Considers the legal issues which arise in relation to the taking of or possession of images still and moving) of children for use in an Open Education Resource. JLL
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Eterio Pajares, Raquel Merino y José Miguel Santamaría (eds.)
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Eterio Pajares, Raquel Merino y José Miguel Santamaría (eds.)
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The eastern Bering Sea is a major marine ecosystem containing some of the largest populations of groundfish, crabs, birds, and marine mammals in the world. Commercial catches of groundfish in this region have averaged about 1.6 million tons (t) annually in 1970-86. This report describes the species and relative importance of species in the eastern Bering Sea groundfish complex, the environment in which they live, and the history of the fisheries and management during the years 1954 - 1985. Historical changes in abundance and the condition of the principal species at the end of this first 30 years of exploitation are also examined. Results suggest that the biomass of the groundfish complex is characterized by variability rather than stability. The most reliable data (1979 to 1985) suggests that the biomass of the complex fluctuated between 11.8 and 15.7 million t. Even greater variability is suggested by the less reliable data from earlier years. Because of its dominance in the complex and wide fluctuations in abundance, walleye pollock (Theragra chalcogramma) is primarily responsible for the major variations in abundance of the complex. After 30 years of exploitation, the complex was generally in excellent condition. (PDF file contains 100 pages.)