Raw material and farm operating costs, in addition to an often static even decreasing market value for many farmed species, necessitates that the farmer reduce production costs so as to maintain profitability. Food and feeding (including fertilisation) usually represent the largest single operating cost item. Therefore attention must be focused on further reducing feed costs per unit of production through the development and use of improved feeds and on-farm fertiliser/feed and water management techniques (Delgado et al. 1999).
Finally, the dietary value and importance of aquaculture products in human nutrition as a much needed source of “affordable” animal protein should not be overlooked; fish being one of the cheapest sources of animal protein in rural and coastal communities. For example, at present freshwater aquaculture (mainly cyprinids and tilapia) offers one of the cheapest sources of high quality animal protein within the major rural inland communities of Asia, including China, India, Indonesia, and the Philippines (Delgado et al. 2002).
Because an appropriate food supply is crucial to the rearing of fish, we have focused on the diet composition and feeding selectivity in early life of cod. Therefore, the aims of the case study were to measure partial substitution of different kinds of fishmeal, corn gluten meal and soybean meal, in diets of juvenile cod through the examination of survival, growth, and feed performance.
UNU
Raw material and farm operating costs, in addition to an often static even decreasing market value for many farmed species, necessitates that the farmer reduce production costs so as to maintain profitability. Food and feeding (including fertilisation) usually represent the largest single operating cost item. Therefore attention must be focused on further reducing feed costs per unit of production through the development and use of improved feeds and on-farm fertiliser/feed and water management techniques (Delgado et al. 1999).Finally, the dietary value and importance of aquaculture products in human nutrition as a much needed source of “affordable” animal protein should not be overlooked; fish being one of the cheapest sources of animal protein in rural and coastal communities. For example, at present freshwater aquaculture (mainly cyprinids and tilapia) offers one of the cheapest sources of high quality animal protein within the major rural inland communities of Asia, including China, India, Indonesia, and the Philippines (Delgado et al. 2002).Because an appropriate food supply is crucial to the rearing of fish, we have focused on the diet composition and feeding selectivity in early life of cod. Therefore, the aims of the case study were to measure partial substitution of different kinds of fishmeal, corn gluten meal and soybean meal, in diets of juvenile cod through the examination of survival, growth, and feed performance.UNU
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