Meeting the feed supply challenges of aquaculture
There is no doubt that the long growth and sustainability of externally fed aquaculture species production (includes all cultured finfish, crustaceans, amphibians, reptiles,invertebrate animals and nonfilter-feeding molluscs; total production estimated at 35 million tonnes or over 55.6 percent of total aquaculture production in 2005) is totally dependent upon the continued availability and provision of feed inputs. It follows from the above that if the current average annual growth rate of fed aquaculture species production is to be sustained at its current rate of 8.9 percent per year (the fed aquaculture sector growing over 108-fold from 322 808 tonnes in 1950 to 35 035 006 tonnes in 2005),then the supply of external feed inputs will also have to grow at imilar rates so as to meet demand. Nowhere is this supply more critical than in ainland China, where externally fed aquaculture species production has been growing at an verage rate of 11.1 percent per year (growing over 331-fold from 65 961 tonnes in 1950 to 21 860 613 tonnes in 2005, and representing 62.4 percent of total global farmed fed-species production). Moreover, with the noticeable shift in Chinese aquaculture production and policy from just the mass production of traditional lower value, staple filter-feeding and herbivorous finfish species (destined mainly for domestic consumption as an affordable source of high-quality animal protein and essential nutrients) toward also the production of higher-value cash crop mnivorous/carnivorous finfish, crustacean, reptilian, invertebrate and molluscan species (destined for high-end domestic urban markets and/or for export), the sector has become increasing reliant upon imports to source key nutrient sources, including plant oilseed meals, fish meals and cereals. In particular, the paper highlights the current dependency of high-end Chinese fed aquaculture species production upon the use of trash fish for marine finfish/high-value aquaculture species and the use of imported fish meal, plant oilseed meals and corn, and the urgent need for the sector to move away from the increased use of potentially food-grade raw materials as feed inputs and to increase domestic self sufficiency in terms of nutrient supply. Particular emphasis is given to the increased use of high-quality feed-grade raw materials arising from the agriculture and seafood processing sector, including the use of rendered animal byproducts, agricultural plant byproducts, single cell proteins, marine seaweeds and cultured invertebrates.
Albert G.J.Tacon Sergio F.Nates
Technical Director Aquatic Farms Ltd Hawaii,United State ofAmericas Technical Services Fats & Proteins Research Foundation,Inc.Alexandria,United States ofAmerica
国际会议
青岛
英文
115-121
2007-05-29（万方平台首次上网日期，不代表论文的发表时间）