Theses and Dissertations


Title: The effects of increased water hardness, salinity, and source of fry on the survival and growth of striped bass fry, Morone saxatilis (Walbaum), in hatching jars

Name: Germann, Jerome Francis

Degree: MS

Chair: Dr. E.W. Shell

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1972

Pages: 34

Keywords: Water Hardness,Salinity,Source of Fry,Survival,Growth,Striped Bass Fry,Hatching Jars.

Abstract:

The effects of increased water hardness, salinity, and source of fry on the survival and growth of striped bass fry from three females from the Cooper River System, South Carolina, and two females from the Savannah River System, Georgia, were investigated at the Fisheries Research Unit, Auburn University, during the period of April 6 to June 11, 1971. Fry were stocked into 7.6 liter hatching jars which received one of three water treatments: untreated water with a total hardness of 30 to 40 ppm: water with increased total hardness, 125 to 175 ppm: and water with increased salinity (chlorides), 1,100 to 1,500 ppm. Water temperatures were maintained within a range of 64 to 68 oF. The percentage survival of striped bass fry was increased in water with added salinity. Water with added total hardness demonstrated little beneficial effect or a detrimental effect on survival of fry during the first 11 days after hatching. Survival of fry at 45 days of age was 0.8% in untreated water, 1.8% in water with added total hardness, and 3.1% in water with added salinity. The percentage survival of Cooper River fry decreased in water with added total hardness but increased in water with added salinity. The percentage survival of fry from Savannah River indicated conflicting effects in water with added total hardness, but beneficial effects in water with added salinity. Water with added total hardness and added salinity resulted in a slight increase in growth of striped bass fry compared to untreated water.

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