NDLI: Responses of Red Drum (Sciaenops ocellatus) to Calcium and Magnesium Concentrations in Fresh and Salt Water

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Responses of Red Drum (Sciaenops ocellatus) to Calcium and Magnesium Concentrations in Fresh and Salt Water

Content Provider	Semantic Scholar
Author	Wurts, William A. Stickney, Robert
Copyright Year	1989
Abstract	Abstract Experiments were conducted to determine some of the chemical aspects of water quality required by cultured red drum in fresh or salt water. Two studies were conducted in fresh and two in salt water differing in concentrations of calcium and magnesium. Red drum weighing 1–3 g each were stocked at 15 fish per 114-l tank. Treatments were replicated three times. Environmental calcium significantly affected red drum survival in fresh and salt water; magnesium produced no discernible effect on performance. In saltwater [35 g/l total dissolved solids (TDS)] experiments, fish in experimental water containing less than 176 mg/l calcium exhibited 100% mortality within 96 h. Highest survivals were observed in water containing 340–465 mg/l calcium. Red drum stocked in fresh water (0.56–1.9 g/l TDS) with calcium concentrations 1.7 mg/l or less performed poorly (0–33% survival after 96 h). Growth and survival were not significantly affected when calcium was between 9 and 407 mg/l. These data are consistent with the recognized physiological effects of calcium on membrane permeability and its postulated function in pore or channel mechanisms. Generally, fish from the first fresh- and saltwater experiments had significantly better longterm (42 days) survival than those from the second set of experiments. This appeared to be related to the use of acid-washed biofiltration media (hypothetically related to the removal of essential trace components) in the second trials.
Starting Page	21
Ending Page	35
Page Count	15
File Format	PDF HTM / HTML
DOI	10.1016/0044-8486(89)90248-2
Volume Number	76
Alternate Webpage(s)	http://www2.ca.uky.edu/wkrec/RedDrumCalciumMagnesium.PDF
Alternate Webpage(s)	https://doi.org/10.1016/0044-8486%2889%2990248-2
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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