Effects of feeding, fertilization, and vegetation on production of red swamp crayfish, Procambarus clarkii
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Abstract
Effects of feed, fertilization, and vegetation on production, growth, and survival of red swamp crayfish (Procambarus clarkii) were studied in metal pools with soil. Experimental pools were stocked at a rate of approximately 31,000 and 62,000 young crayfish/ha in the winter and with approximately 62,000 crayfish/ha in the summer. Highest production occurred during summer for all treatments with 62,000 young crayfish stocked/ha. Water temperatures and growth of plankton blooms affected production between seasons. Optimal production and growth occurred for animals given pelleted feed (1,186 kg/ha and 22 g/crayfish) and for those given extruded feed (1,135 kg/ha and 21 g/crayfish). Average production and growth were similar for animals maintained on smartweed, (Polygonum sp.) (777 kg/ha and 13 g/crayfish) and for those on alligator weed (Alternanthera philoxeroides) 676 kg/ha and 12 g/crayfish). Comparable production and growth potential occurred for crayfish under fertilization (694 kg/ha and 13 g/crayfish). Survival apparently was not affected by increased stocking rate. Average survival was similar for all treatments, i.e. > from 47 to 88% in the winter and 85 to 95% in the summer.
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Clark DF, Avault Jr. JW and Meyers SP. (1975). Effects of feeding, fertilization, and vegetation on production of red swamp crayfish, Procambarus clarkii. Freshwater Crayfish 2(1):125-138. doi: 10.5869/fc.1975.v2.125
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