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Water Quality Of Two Closed Recirculating Soft Shell Crab Shedding Facilities
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1986
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[PDF-1.00 MB]
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Description:Nitrate, nitrite, and ammonium concentrations remained below accepted toxic limits for molting blue crabs in both the protein-skimmer and biological-filter systems. However, a significant negative correlation was established between nitrate concentrations and the number of crabs shed in the protein-skimmer system. Ammonium, ammonia, and nitrite levels were generally greater in the protein-skimmer system. The oyster-shell filter of the protein-skimmer system produced calcium levels that exceeded and alkalinity levels which were less than those determined for the crushed-coral medium of the biological-filter system. The efficiency of the latter increased with time and conditioning as evidenced by decreasing nitrite levels.
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Sea Grant Document Number:GAUS-T-86-001
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Rights Information:Public Domain
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Compliance:Library
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