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	Provedor de dados Naturalis (1) AgEcon (1) Autor Cole, M.L. (1) Conradie, Beatrice (1) Herbert, D.G. (1) Hoag, Dana L. (1) Palavra-chave Eastern Cape (2) South Africa (2) 42.73 (1) Conservation (1) Gastropoda (1) Gulella (1) Irrigation (1) Linear programming (1) Mollusca (1) New species (1) Q12 (1) Q15 (1) Range extensions (1) Resource /Energy Economics and Policy (1) Streptaxidae (1) Taxonomy (1) Water value (1) Mais... Tipo do documento Article / Letter to the editor (1) Conference Paper or Presentation (1) Ano 2009 (1) 2003 (1) País Netherlands (1) United States (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Description of four new species of Gulella Pfeiffer, 1856 from Eastern Cape, South Africa, with additional notes on two poorly known species (Mollusca: Eupulmonata: Streptaxidae) Naturalis Cole, M.L.; Herbert, D.G.. Gulella bruggeni spec. nov., G. bomvana spec. nov., G. tietzae spec. nov. and G. ndibo spec. nov. are described from the Transkei region of Eastern Cape Province, South Africa. All are minute, smooth-shelled species with complex apertural dentition. Due to their limited ranges and continuing decline in extent and quality of habitat, G. bruggeni spec. nov., G. bomvana spec. nov. and G. ndibo spec. nov. are likely to meet the distribution-based criteria for red-listing as Critically Endangered and G. tietzae spec. nov. as Endangered. G. aprosdoketa and G. chi are discussed and illustrated for comparison and the known distribution of each is extended. Tipo: Article / Letter to the editor Palavras-chave: Mollusca; Gastropoda; Streptaxidae; Gulella; Taxonomy; New species; Range extensions; Conservation; Eastern Cape; South Africa; 42.73. Ano: 2009 URL: http://www.repository.naturalis.nl/record/311932 THE COST OF MEETING EQUITY: OPPORTUNITY COST OF IRRIGATION IN THE FISH-SUNDAYS SCHEME OF SOUTH AFRICA AgEcon Hoag, Dana L.; Conradie, Beatrice. In this paper the incremental values of water are calculated for irrigators in the Fish-Sundays Scheme of South Africa's Eastern Cape province. The socio-political pressure for redistribution of agricultural resources provided the imperative for this study. The model of the Fish-Sundays Scheme reflects a survey of 50 000ha of fodder and citrus production. It explicitly models the water demand on sixteen typical farms, for five irrigation technologies, six crops and four livestock activities. The existing allocation generates an average value of R0.0423/m3/year, which increases to R0.0681/m3/year if farmer-to-farmer trading is allowed given existing infrastructure. Unrestricted trade raises the average value to R0.0719/m3/year. The marginal cost of... Tipo: Conference Paper or Presentation Palavras-chave: Water value; Irrigation; Linear programming; South Africa; Eastern Cape; Resource /Energy Economics and Policy; Q15; Q12. Ano: 2003 URL: http://purl.umn.edu/25832 Registros recuperados: 2 Primeira ... 1 ... Última

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