Environmental Factors and Production Characteristics Affecting the Culture of Red Drum, Sciaenops Ocellatus.
Experiments with red drum, Sciaenops ocellatus, were conducted to assess environmental requirements and culture characteristics. Pond trials were used to evaluate the effects of salinity, chloride source, predator control, acclimation procedure, stocking density, and size at stocking on production....
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ftlouisianastuir:oai:digitalcommons.lsu.edu:gradschool_disstheses-6151 2023-06-11T04:16:16+02:00 Environmental Factors and Production Characteristics Affecting the Culture of Red Drum, Sciaenops Ocellatus. Thomas, Rowland Glenn 1991-01-01T08:00:00Z application/pdf https://digitalcommons.lsu.edu/gradschool_disstheses/5152 https://doi.org/10.31390/gradschool_disstheses.5152 https://digitalcommons.lsu.edu/context/gradschool_disstheses/article/6151/viewcontent/9200095.pdf English eng LSU Digital Commons https://digitalcommons.lsu.edu/gradschool_disstheses/5152 doi:10.31390/gradschool_disstheses.5152 https://digitalcommons.lsu.edu/context/gradschool_disstheses/article/6151/viewcontent/9200095.pdf LSU Historical Dissertations and Theses Agriculture forestry and wildlife fisheries and aquaculture text 1991 ftlouisianastuir https://doi.org/10.31390/gradschool_disstheses.5152 2023-05-28T19:14:27Z Experiments with red drum, Sciaenops ocellatus, were conducted to assess environmental requirements and culture characteristics. Pond trials were used to evaluate the effects of salinity, chloride source, predator control, acclimation procedure, stocking density, and size at stocking on production. Survival in individual ponds ranged from 0-92%; average daily weight gain from 0.46-2.22g; and feed conversion ratio from 2.30-4.90. Survival, growth, and feed conversion ratio did not differ significantly between equivalent treatments in saltwater and freshwater ponds. The minimum chloride concentration necessary for acceptable production of red drum in freshwater ponds (250-300 mg/l) was at least 100% higher than the concentrations reported to support high survival and growth in some laboratory experiments. Mortality in ponds could be attributed to hypoxia, handling and stocking stresses, and vertebrate predators. A laboratory experiment was designed to determine the dissolved oxygen tolerance of juvenile red drum in relation to temperature and salinity. Fingerling red drum acclimated to combinations of 0.5 and 5 ppt salinity and 25 and 30 C survived to low dissolved oxygen concentration (0.34 mg/l) when concentration was reduced over several hours, as might occur in culture ponds. No difference due to temperature or salinity was detected in resistance to hypoxia. Red drum survived to significantly lower mean dissolved oxygen concentration when rate of deoxygenation was reduced. Results of these experiments indicate that red drum can be successfully cultured if water quality, predation, and handling stresses are controlled. Text Red drum Sciaenops ocellatus LSU Digital Commons (Louisiana State University) |
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LSU Digital Commons (Louisiana State University) |
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ftlouisianastuir |
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English |
topic |
Agriculture forestry and wildlife fisheries and aquaculture |
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Agriculture forestry and wildlife fisheries and aquaculture Thomas, Rowland Glenn Environmental Factors and Production Characteristics Affecting the Culture of Red Drum, Sciaenops Ocellatus. |
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Agriculture forestry and wildlife fisheries and aquaculture |
description |
Experiments with red drum, Sciaenops ocellatus, were conducted to assess environmental requirements and culture characteristics. Pond trials were used to evaluate the effects of salinity, chloride source, predator control, acclimation procedure, stocking density, and size at stocking on production. Survival in individual ponds ranged from 0-92%; average daily weight gain from 0.46-2.22g; and feed conversion ratio from 2.30-4.90. Survival, growth, and feed conversion ratio did not differ significantly between equivalent treatments in saltwater and freshwater ponds. The minimum chloride concentration necessary for acceptable production of red drum in freshwater ponds (250-300 mg/l) was at least 100% higher than the concentrations reported to support high survival and growth in some laboratory experiments. Mortality in ponds could be attributed to hypoxia, handling and stocking stresses, and vertebrate predators. A laboratory experiment was designed to determine the dissolved oxygen tolerance of juvenile red drum in relation to temperature and salinity. Fingerling red drum acclimated to combinations of 0.5 and 5 ppt salinity and 25 and 30 C survived to low dissolved oxygen concentration (0.34 mg/l) when concentration was reduced over several hours, as might occur in culture ponds. No difference due to temperature or salinity was detected in resistance to hypoxia. Red drum survived to significantly lower mean dissolved oxygen concentration when rate of deoxygenation was reduced. Results of these experiments indicate that red drum can be successfully cultured if water quality, predation, and handling stresses are controlled. |
format |
Text |
author |
Thomas, Rowland Glenn |
author_facet |
Thomas, Rowland Glenn |
author_sort |
Thomas, Rowland Glenn |
title |
Environmental Factors and Production Characteristics Affecting the Culture of Red Drum, Sciaenops Ocellatus. |
title_short |
Environmental Factors and Production Characteristics Affecting the Culture of Red Drum, Sciaenops Ocellatus. |
title_full |
Environmental Factors and Production Characteristics Affecting the Culture of Red Drum, Sciaenops Ocellatus. |
title_fullStr |
Environmental Factors and Production Characteristics Affecting the Culture of Red Drum, Sciaenops Ocellatus. |
title_full_unstemmed |
Environmental Factors and Production Characteristics Affecting the Culture of Red Drum, Sciaenops Ocellatus. |
title_sort |
environmental factors and production characteristics affecting the culture of red drum, sciaenops ocellatus. |
publisher |
LSU Digital Commons |
publishDate |
1991 |
url |
https://digitalcommons.lsu.edu/gradschool_disstheses/5152 https://doi.org/10.31390/gradschool_disstheses.5152 https://digitalcommons.lsu.edu/context/gradschool_disstheses/article/6151/viewcontent/9200095.pdf |
genre |
Red drum Sciaenops ocellatus |
genre_facet |
Red drum Sciaenops ocellatus |
op_source |
LSU Historical Dissertations and Theses |
op_relation |
https://digitalcommons.lsu.edu/gradschool_disstheses/5152 doi:10.31390/gradschool_disstheses.5152 https://digitalcommons.lsu.edu/context/gradschool_disstheses/article/6151/viewcontent/9200095.pdf |
op_doi |
https://doi.org/10.31390/gradschool_disstheses.5152 |
_version_ |
1768373861954355200 |