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The magnitude of apparent specific dynamic action (SDA), the maximum rate of oxygen consumption and the length of time that the rate of oxygen uptake remained elevated above the prefeeding level were measured in the Pearl Spot, Etroplus suratensis, fed isonitrous test diets (D 1 - D 4 ) with varying nutrient sources. Irrespective of the diets, the metabolic rate increased immediately after feeding and reached the maximum within 3 to 4 hours.
This paper provides an overview of the live reef fish market in Hong Kong, which accounted for about 15,000 t/yr (US$345 million) of live fish imports in the mid-1990s. The live fish trade has spawned a number of management concerns, including overfishing of highly-valued species, use of destructive fishing techniques and human health risks.
Improved farm household nutrition and a stronger economy are among the principal intended benefits of integrated farming systems based on fish culture. Paradoxically, no controllell research has been conducted to assess the extent to which these intended benefits occur in practice. In this paper the authors present a simple field use methodology for estimating these nutritional and economic benefits, using survey and secondary statistical data from Ghana to model outcomes.