Resource Use Assessment of Shrimp, Litopenaeus vannamei and Penaeus monodon, Production in Thailand and Vietnam

Resource use was investigated at 34 Litopenaeus vannamei and five Penaeus monodon farms in Thailand and 30 L. vannamei and 24 P. monodon farms in Vietnam. Farms varied in water surface areas for production, reservoirs, canals, and settling basins; in pond size and depth; and in water management, stocking density, feeding rate, amendment input, aeration rate, crop duration, and crops per year. Production of L. vannamei averaged 17.3 and 10.9m.t./ha/yr, and feed conversion ratio averaged 1.49 and 1.33 in Thailand and Vietnam, respectively. On average, production of 1m.t. of L. vannamei required 0.58 ha land, 5,400m(3) water, 60 GJ energy, and 1218 kg wildfish in Thailand and 1.76 ha land, 15,100m(3) water, 33.7 GJ energy, and 1264 kg wildfish in Vietnam. Resource use per metric ton of shrimp declined with greater production intensity. In Thailand, P. monodon was produced at 0.2-0.4m.t./ha/yr, with no inputs but water and postlarvae. In Vietnam, P. monodon production averaged 3.60m.t./ha/yr. Production of 1m.t. of P. monodon required 0.80 ha land, 36,000m(3) water, 47.8 GJ energy, and 1180 kg wildfish, and resource use per ton production declined with increasing production intensity.