Aquaculture has a long history with its origins dating back to at least 475 BC in China (Milne, 1973). Trout culture started in Germany in 1741 (Leitritz and Lewis, 1980) but it wasn't until the 1880's that trout culture came to the U.S. This was the first U.S. aquaculture effort. However, aquaculture was not of much importance until the late 1940s when it was discovered that aquaculture m…