984 resultados para 110-673A
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Référence bibliographique : Rol, 59673
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Référence bibliographique : Rol, 60601
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Référence bibliographique : Rol, 60602
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Référence bibliographique : Rol, 60603
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Référence bibliographique : Rol, 60604
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Référence bibliographique : Rol, 60800
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Servicios registrales
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Aquaculture is a form of agriculture that involves the propagation, cultivation and marketing of aquatic plants and animals in a controlled environment (Swann, 1992). After growing steadily, particularly in the last four decades, aquaculture is for the first time set to contribute half of the fish consumed by the human population worldwide. Given the projected population growth over the next two decades, it is estimated that at least an additional 40 million tonnes of aquatic food will be required by 2030 to maintain the current per capita consumption (FAO, 2006). Capture fisheries and aquaculture supplied the world with about 110 million tonnes of food fish in 2006. Of this total, aquaculture accounted for 47 percent (FAO, 2009). Globally, penaeid shrimp culture ranks sixth in terms of quantity and second in terms of value amongst all taxonomic groups of aquatic animals cultivated (FAO, 2006). In places where warm-water aquaculture was possible black tiger shrimp, Penaeus monodon became the preferred variety of shrimp cultivar owing to its fast growth, seed availability and importantly due to high prices it fetches (Pechmanee, 1997). World shrimp production is dominated by P.monodon, which accounted for more than 50 % of the production in 1999 (FAO, 2000). In the last few years the whiteleg shrimp, Litopenaeus vannamei, has replaced P.monodon in many countries. Indian shrimp culture is dominated by P.monodon with the East Coast accounting for 70% of the production (Hein, 2002). Intensive culture, apart from other problems, results in enhanced susceptibility of the cultured species to diseases (Jory, 1997), which in fact have become the biggest constraint in shrimp aquaculture (FAO, 2003).
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Incluye índice temático. Editado por Seth Lindstromberg y traducción española de Alejandro Valero
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Recopilación de juegos procedente de diversas fuentes; apropiados para realizar en actividades de tiempo libre. En cada juego se especifica la edad adecuada y número de los participantes, habilidades que se pretende desarrollar, materiales necesarios; también, las reglas y desarrollo de cada actividad.
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Se presenta el Plan de inversiones para el curso 1961-1962, del Fondo para el Fomento de Igualdad de Oportunidades, por parte del Ministro de Educación Nacional, el Sr. Rubio García-Mina. Se desarrolla este plan respecto a la Enseñanza Primaria y Enseñanza Media y Profesional. Se aporta el detalle de las inversiones del plan en cifras.