Organic Value Recovery Solutions LLC © Organic Value Recovery Solutions 2010 © Organic Value Recovery Solutions 2010 Fishmeal Replacement Found for Salmon Salmon and salmonid species are some of the most desirable commercial fish species in the world. These species include fish such as Sockeye Salmon, Coho, Steelhead and Rainbow Trout. Until the 1960’s, salmon were wild-caught and intensive fish farming was in its infancy. By the 1980s and 1990s, commercial salmon farming was well established in many countries around the world. By 2004, the global production of farmed salmon exceeded the wild harvest by more than one million metric tons. Unlike some farmed fish species, salmon are carnivores. They require animal protein in their diet. So in order to raise salmon species, a ready source of acceptable protein and energy is required (see: BSF as feedstuff for Rainbow Trout). Harvesting other lesser-value fish species and using this fishmeal protein in the salmon feed is the usual practice. It takes about 2 lbs of harvested lesser-value fish to produce 1 lb of farmed salmon. The problem is that there is a limit to the amount of fishmeal that is available. Numerous alternatives have been tried including using plant protein and other alternatives with some success. However salmonids still require a suitable amount of an acceptable animal protein. The problem is that fish harvests as a salmon feed are meeting their limits. A new production technique is set to alleviate part of this problem by supplying insect protein that is suitable for carnivorous fish. OVRSol, a Georgia, USA, based company uses a voracious insect, the Black Soldier Fly (BSF) to convert waste streams into insects that are a suitable replacement for fishmeal. A study showed that using BSF as a 25 – 30% replacement for fishmeal is possible without any processing of the insects. Further processing of the insects to remove chitin would probably result in higher percentage replacements. In channel catfish, a complete replacement of fishmeal with BSF is possible. Another very interesting development is the use of “designer” feeds for the insects. By controlling what the BSF eats, customized levels of Omega 3 fatty acids, for example, can be produced. Multi-ton batches of BSF larvae are possible with the OVRSol system. Insects can be grown on swine and poultry manure, brewer’s grains, palm oil meal, vegetables, ketchup, carrion, food wastes and other waste streams. The resulting insect mulch also becomes a valuable fertilizer and soil amendment. Nothing is wasted. This is great news for the salmon farming industry, as an environmentally sustainable fishmeal substitute is as close as the nearest waste stream.