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De ontwikkeling in het aantal vrijkomende landbouwbedrijven in Overijssel en het nieuwe gebruik daarvan wordt voor de periode 1983-'87 beschreven. De gegevens zijn d.m.v. een telefonische enquete verzameld.
This document is prepared for fisheries biologists, managers and administrators concerned with lagoon fisheries and aquaculture. Our main objective is to draw attention to the need for greater understanding of relationships between the hydraulics and productivity of lagoon fish and shellfish.
This report summarises results and recommendations arising from phase one of the Sepik River Fish Stock Enhancement Project. This phase investigated and evaluated the need for fish stocking of the Sepik and Ramu Rivers in Papua New Guinea.
El fuego es a veces enemigo, a voces amigo, segn el uso a que se destine la tierra y segn el valor que asuman unas cuantas variables ambientales; en cualquier caso, siempre repercute en los ecosistemas de recursos naturales.
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