An evaluation of specific ionic and growth parameters affecting the feasibility of commercially producing red drum (Sciaenops ocellatus)
Typescript (photocopy). Seven experiments were conducted to determine whether red drum might be commercially cultured in inland salt or fresh waters. Four of these were to define specific environmental requirements, absolute and survival ranges, for calcium and magnesium. Two initial and two seconda...
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fttexasamuniv:oai:oaktrust.library.tamu.edu:1969.1/DISSERTATIONS-754228 2023-07-16T04:00:41+02:00 An evaluation of specific ionic and growth parameters affecting the feasibility of commercially producing red drum (Sciaenops ocellatus) Wurts, William Aldis Stickney, Robert R. Strawn, R. Kirk Finne, Gunnar Wormuth, John H. 1987 ix, 92 leaves electronic application/pdf reformatted digital https://hdl.handle.net/1969.1/DISSERTATIONS-754228 eng eng Texas A&M University. Libraries https://hdl.handle.net/1969.1/DISSERTATIONS-754228 18941609 This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. http://rightsstatements.org/vocab/InC/1.0/ Major wildlife and fisheries sciences 1987 Dissertation W969 Red drum Growth Red drum fisheries Fish culture Thesis dissertations text 1987 fttexasamuniv 2023-06-27T22:08:33Z Typescript (photocopy). Seven experiments were conducted to determine whether red drum might be commercially cultured in inland salt or fresh waters. Four of these were to define specific environmental requirements, absolute and survival ranges, for calcium and magnesium. Two initial and two secondary studies were conducted in salt and fresh waters differing in concentrations of calcium and/or magnesium. Red drum weighing 1-3 g were stocked in each experimental trial at 15/114 l tank; treatments had three replicates. Environmental calcium significantly affected red drum survival in salt and fresh waters; magnesium produced no discernible performance effects. In saltwater (35 g/l total dissolved solids (TDS)) experiments, fish in treatments containing less than 176 mg/l calcium exhibited 100% mortality within 96 hours. Best survivals, 78-84% at 96 hours, were observed in treatments 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 within 96 hours). Growth and survival were not significantly affected when calcium was between 9-407 mg/l. Ammonia-nitrogen concentrations were significantly higher in saltwater treatments containing trace magnesium. Generally, fish from initial fresh water and saltwater experiments had significantly better long term (42 day) survivals than those from the second set of experiments. This appeared to be related to the use of acid washed biofiltration media (removal of essential trace components perhaps) in the second trials. Three growth feasibility studies were performed, two in ponds with hard (120 mg/l calcium) fresh water and one in a low salinity (5 g/l TDS) closed system. Pond results suggested that red drum fingerlings (35 g) performed better, mean weight 450 g with 90% survival after 215 days, than fry (4-6 g), mean weight 18 g with 9-15% survival after 106-115 days. Apparently, floating catfish feed was not consumed, while crawfish and tilapia fry were. Closed system ... Thesis Red drum Sciaenops ocellatus Texas A&M University Digital Repository |
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Open Polar |
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Texas A&M University Digital Repository |
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fttexasamuniv |
language |
English |
topic |
Major wildlife and fisheries sciences 1987 Dissertation W969 Red drum Growth Red drum fisheries Fish culture |
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Major wildlife and fisheries sciences 1987 Dissertation W969 Red drum Growth Red drum fisheries Fish culture Wurts, William Aldis An evaluation of specific ionic and growth parameters affecting the feasibility of commercially producing red drum (Sciaenops ocellatus) |
topic_facet |
Major wildlife and fisheries sciences 1987 Dissertation W969 Red drum Growth Red drum fisheries Fish culture |
description |
Typescript (photocopy). Seven experiments were conducted to determine whether red drum might be commercially cultured in inland salt or fresh waters. Four of these were to define specific environmental requirements, absolute and survival ranges, for calcium and magnesium. Two initial and two secondary studies were conducted in salt and fresh waters differing in concentrations of calcium and/or magnesium. Red drum weighing 1-3 g were stocked in each experimental trial at 15/114 l tank; treatments had three replicates. Environmental calcium significantly affected red drum survival in salt and fresh waters; magnesium produced no discernible performance effects. In saltwater (35 g/l total dissolved solids (TDS)) experiments, fish in treatments containing less than 176 mg/l calcium exhibited 100% mortality within 96 hours. Best survivals, 78-84% at 96 hours, were observed in treatments 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 within 96 hours). Growth and survival were not significantly affected when calcium was between 9-407 mg/l. Ammonia-nitrogen concentrations were significantly higher in saltwater treatments containing trace magnesium. Generally, fish from initial fresh water and saltwater experiments had significantly better long term (42 day) survivals than those from the second set of experiments. This appeared to be related to the use of acid washed biofiltration media (removal of essential trace components perhaps) in the second trials. Three growth feasibility studies were performed, two in ponds with hard (120 mg/l calcium) fresh water and one in a low salinity (5 g/l TDS) closed system. Pond results suggested that red drum fingerlings (35 g) performed better, mean weight 450 g with 90% survival after 215 days, than fry (4-6 g), mean weight 18 g with 9-15% survival after 106-115 days. Apparently, floating catfish feed was not consumed, while crawfish and tilapia fry were. Closed system ... |
author2 |
Stickney, Robert R. Strawn, R. Kirk Finne, Gunnar Wormuth, John H. |
format |
Thesis |
author |
Wurts, William Aldis |
author_facet |
Wurts, William Aldis |
author_sort |
Wurts, William Aldis |
title |
An evaluation of specific ionic and growth parameters affecting the feasibility of commercially producing red drum (Sciaenops ocellatus) |
title_short |
An evaluation of specific ionic and growth parameters affecting the feasibility of commercially producing red drum (Sciaenops ocellatus) |
title_full |
An evaluation of specific ionic and growth parameters affecting the feasibility of commercially producing red drum (Sciaenops ocellatus) |
title_fullStr |
An evaluation of specific ionic and growth parameters affecting the feasibility of commercially producing red drum (Sciaenops ocellatus) |
title_full_unstemmed |
An evaluation of specific ionic and growth parameters affecting the feasibility of commercially producing red drum (Sciaenops ocellatus) |
title_sort |
evaluation of specific ionic and growth parameters affecting the feasibility of commercially producing red drum (sciaenops ocellatus) |
publisher |
Texas A&M University. Libraries |
publishDate |
1987 |
url |
https://hdl.handle.net/1969.1/DISSERTATIONS-754228 |
genre |
Red drum Sciaenops ocellatus |
genre_facet |
Red drum Sciaenops ocellatus |
op_relation |
https://hdl.handle.net/1969.1/DISSERTATIONS-754228 18941609 |
op_rights |
This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. http://rightsstatements.org/vocab/InC/1.0/ |
_version_ |
1771549703209484288 |