Abstract: In one embodiment, a system for rearing larvae includes a plurality of culture trays arranged in at least one stack of trays, each stack comprising multiple levels of trays, each tray comprising an open-topped basin adapted to receive larvae and larval food, a feed delivery system adapted to automatically deliver larval feed to individually selected culture trays, and a water delivery system adapted to automatically deliver water to the culture trays.

Abstract: In one embodiment, a system for rearing larvae includes a plurality of culture trays arranged in at least one stack of trays, each stack comprising multiple levels of trays, each tray comprising an open-topped basin adapted to receive larvae and larval food, a feed delivery system adapted to automatically deliver larval feed to individually selected culture trays, and a water delivery system adapted to automatically deliver water to the culture trays.

Abstract: A feed composition containing L-carnitine and a high nutrient density diet is found to increase the lean-to-fat ratio of early weaned pigs. The L-carnitine is preferably reduced as the animal passes through its various stages of development, with initial concentrations ranging from 5 to 5000 ppm. In the finishing stage, less than 5 ppm of L-carnitine may advantageously be incorporated in the diet.

Abstract: Feed compositions containing at least 0.6% lysine, preferably between about 0.7 and 0.8% lysine, and between approximately 0.1 to 400 ppm, preferably between 5 and 50 ppm, L-carnitine produce greater weight gains and feed efficiency, and alter fat metabolism, as compared with the same diet in the absence of the carnitine when fed to the finishing pigs. The L-carnitine can also be administered as a feed supplement providing between 0.05 and 15 mg L-carnitine/kg body weight/day, most preferably between 0.1 and 2.0 mg L-carnitine/kg body weight/day. The effect of the carnitine is sex linked, with significantly greater weight gains and feed efficiency observed for gilts than for barrows.

Abstract: Fish feed compositions supplemented with up to 0.5% L-carnitine, preferably between 0.01% to 0.3% L-carnitine, produce greater growth gains, decreased fat levels in tissues, and increased resistance to stress (ammonia toxicity) in fish, as compared to fish fed the same diet without supplemental carnitine.