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a r t i c l e i n f o Although the oceans cover 70% of the surface of the planet few studies have considered the economic valuation of marine biodiversity, despite the importance of such information for marine management and conservation. This study uses a contingent valuation method to estimate the public's willingness to pay (WTP) to avoid loss in the(More)
Altering root morphology of rice (Oryza sativa L.) cultivars could improve yields in drought-prone upland ecosystems. Marker-assisted backcross breeding was used to introgress four QTLs for root traits into an upland rice cultivar. The QTLs had previously been identified under experimental conditions in a different genetic background. The introgressed lines(More)
Who Harvests and Why? Characteristics of Guatemalan Households Harvesting Xaté (Chamaedorea ernesti-augusti). Cultivation of harvested species is frequently proposed as a conservation strategy to reduce wild harvesting pressure and improve local livelihoods. The success of this approach is likely to be influenced by harvesters’ socioeconomic(More)
International agreements and policies play an increasingly prominent role in strategies to combat biodiversity loss. However, conservation policies can only have a conservation impact if implemented. Identifying factors determining the influence of a policy on institutions could improve the process of policy development and communication. We examine how and(More)
Cultivation of wild-harvested plant species has been proposed as a way of reducing over-exploitation of wild populations but lack of technical knowledge is thought to be a barrier preventing people from cultivating a new species. Training programmes are therefore used to increase technical knowledge to encourage people to adopt cultivation. We assessed the(More)
This paper presents a linear programming model designed to evaluate the impact of changes in milk to milk-quotaleasing price ratios, nitrogen fertiliser and concentrate prices on the pro®tability of a technically ecient UK dairy farm. The model incorporates energy and protein requirements of cows of di€erent yield levels and allows substitution between(More)
Detection of animals during visual surveys is rarely perfect or constant, and failure to account for imperfect detectability affects the accuracy of abundance estimates. Freshwater cetaceans are among the most threatened group of mammals, and visual surveys are a commonly employed method for estimating population size despite concerns over imperfect and(More)
Botanic gardens often highlight public education as a priority. Increasing knowledge about biodiversity conservation is a frequently stated aim of environmental education. This is often based on the assumption that increasing knowledge may generate positive environmental attitudes. We investigate the relationship between knowledge and environmental(More)