Effect of Additive on the Chemical Composition of Tra Catfish (Pangasius Hypophthalmus) By-Product Silages and Their Nutritive Value for Pigs (Report‪)‬

INTRODUCTION There is a great potential for increased aquaculture production in the Mekong Delta in southern Vietnam (Wilder and Phuong, 2002). Currently, the most commonly cultured fish species in the region are river catfish, especially Tra catfish (Pangasius hypophthalmus), the production of which is developing very rapidly because of the high value of the exported fillet products (Phillips, 2002). There are several factories in the Delta that produce Pangasius fillets for export, and their processing generates considerable quantities of by-products, including head, skin and bone, that in total represent about 65% of the fish by weight (Thuy et al., 2007). These are potentially valuable protein sources for livestock in the Mekong Delta, especially for pig production (Men et al., 2004).