Feasibility of Pond Production of Largemouth Bass, Micropterus salmoides, for a Filet Market

The effects of stocking density on food-size largemouth bass (LMB), Micropterus salmoides, production (>0.5kg) were evaluated in a 2-yr study by stocking LMB fingerlings (mean weight=57g/fish) in 0.1-ha earthen ponds at rates of 6175, 12,350, or 18,525 fish/ha. Gross yields increased from 3989 to 9096kg/ha as stocking density increased. No significant differences were observed in survival rates (range of 65-74%) due to density. Maximum feed consumption occurred at water temperatures of 27-30 C. Feed conversion ratio (FCR) and mean harvest weight were significantly different (P<0.05) among densities, with the lowest FCR and the lowest mean weight found at the highest density (18,525 fish/ha). At harvest, LMB were considered to be in good condition with relative weight (W-r) values of 123-124. Dressout yield percentages were 61-62% for whole-dressed LMB and 34-35% for shank filets. LMB grew well and reached a size adequate for targeted shank filet sizes. However, the production costs of $7.26-$9.34/kg mean that LMB production for a filet market is unlikely to be feasible. Research to lower LMB fingerling and feed costs and improved FCR would contribute to improved economic feasibility.