Due to the ever increasing demand for fish meal and fish oil to be used in feeds for farmed fish and crustaceans, there has been concern that the over-reliance on capture fishery-derived fish products for aquaculture would contribute to the over-exploitation of certain types of fisheries, with concomitant effects on the stocks of other wild fish (Naylor et al., 2000). However, time-series data show that there has been no upward trend in the catch of fish for feed since the 1980s (New et al., 2002). Based on current developments in fish feed formulations, it is now recognized that aquaculture contributes to global fisheries supply and does not deplete the marine fishery resources (Naylor et al., 2009). Besides, the fish meal industry has committed itself and set forth several stringent measures to ensure that the feed-grade fisheries respect sustainability criteria. Another issue of concern is the poor management of rejects.
The use of fish meal obtained from raw fish as a feedstuff for terrestrial animal feeds still remains a debated issue (Kaushik, 2010).