994 resultados para Sauer, Russell


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Los asuntos éticos constituyeron una de las preocupaciones fundamentales de Bertrand Russell a lo largo de su vida. Luego de un pasar por un período caracterizado por una visión objetivista e intuicionista de los valores,Russell fue uno de los primeros en desarrollar una teoría emotivista de los valores. El objetivo de este artículo es presentar esta teoría a la vez que examinar los fundamentos en que se sostiene y mostrar sus implicancias.

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Fil: Di Berardino, María Aurelia. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

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Los asuntos éticos constituyeron una de las preocupaciones fundamentales de Bertrand Russell a lo largo de su vida. Luego de un pasar por un período caracterizado por una visión objetivista e intuicionista de los valores,Russell fue uno de los primeros en desarrollar una teoría emotivista de los valores. El objetivo de este artículo es presentar esta teoría a la vez que examinar los fundamentos en que se sostiene y mostrar sus implicancias.

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To address growing concern over the effects of fisheries non-target catch on elasmobranchs worldwide, the accurate reporting of elasmobranch catch is essential. This requires data on a combination of measures, including reported landings, retained and discarded non-target catch, and post-discard survival. Identification of the factors influencing discard vs. retention is needed to improve catch estimates and to determine wasteful fishing practices. To do this we compared retention rates of elasmobranch non-target catch in a broad subset of fisheries throughout the world by taxon, fishing country, and gear. A regression tree and random forest analysis indicated that taxon was the most important determinant of retention in this dataset, but all three factors together explained 59% of the variance. Estimates of total elasmobranch removals were calculated by dividing the FAO global elasmobranch landings by average retention rates and suggest that total elasmobranch removals may exceed FAO reported landings by as much as 400%. This analysis is the first effort to directly characterize global drivers of discards for elasmobranch non-target catch. Our results highlight the importance of accurate quantification of retention and discard rates to improve assessments of the potential impacts of fisheries on these species.

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v.3:no.7(1970)

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Brief note from Samuel Russell to Treasurer Ebenezer Storer requesting delivery of the sloop's mainsail and jibb to the new owner.

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Half-page letter from Samuel Russell to Treasurer Ebenezer Storer informing him that the sloop Cyrus has been sold and requesting a bill of sale.