Effects of environmental salinity and 17α-methyltestosterone on growth and oxygen consumption in the tilapia, Oreochromis mossambicus
Effects of environmental salinity and 17α-methyltestosterone (MT) on growth and oxygen consumption were examined in the tilapia, Oreochromis mossambicus. Yolk-sac fry were collected from brood stock in fresh water (FW). After yolk-sac absorption, they were assigned randomly to one of four groups: FW...
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Veröffentlicht in: | Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology 2003-12, Vol.136 (4), p.657-665 |
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creator | Sparks, Russell T. Shepherd, Brian S. Ron, Benny Harold Richman, N. Riley, Larry G. Iwama, George K. Hirano, Tetsuya Gordon Grau, E. |
description | Effects of environmental salinity and 17α-methyltestosterone (MT) on growth and oxygen consumption were examined in the tilapia,
Oreochromis mossambicus. Yolk-sac fry were collected from brood stock in fresh water (FW). After yolk-sac absorption, they were assigned randomly to one of four groups: FW, MT treatment in FW, seawater (SW) and MT treatment in SW. All treatment groups were fed to satiation three times daily. The fish reared in SW (both control and MT-treated groups) grew significantly larger than either group in FW from day 43 throughout the experiment (195 days). The fish fed with MT added to their feed grew significantly larger than their respective controls from day 85 in FW and in SW until the end of the experiment. The routine metabolic rate (RMR) was determined monthly from month 2 (day 62) to month 5 (day 155). A significant negative correlation was seen between RMR and body mass in all treatment groups. Among fish of the same age, the SW-reared tilapia had significantly lower RMRs than the FW-reared fish. The MT-treated fish in SW showed significantly lower RMRs than the SW control group at months 3–5, whereas MT treatment in FW significantly increased the RMR at month 3. Comparison of regression lines between RMR and body mass indicates that MT treatment in FW caused a significant increase in oxygen consumption at a given mass of the fish, whereas MT treatment was without effect on RMR in SW-reared fish. These results clearly indicate that SW-rearing and MT treatment accelerate growth of tilapia, and that RMR decreases as fish size increased. It is also likely that the increased RMR and growth in MT-treated tilapia in FW may be due to the metabolic actions of MT, although the reason for the absence of MT treatment in SW is unclear. |
doi_str_mv | 10.1016/S1096-4959(03)00245-8 |
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Oreochromis mossambicus. Yolk-sac fry were collected from brood stock in fresh water (FW). After yolk-sac absorption, they were assigned randomly to one of four groups: FW, MT treatment in FW, seawater (SW) and MT treatment in SW. All treatment groups were fed to satiation three times daily. The fish reared in SW (both control and MT-treated groups) grew significantly larger than either group in FW from day 43 throughout the experiment (195 days). The fish fed with MT added to their feed grew significantly larger than their respective controls from day 85 in FW and in SW until the end of the experiment. The routine metabolic rate (RMR) was determined monthly from month 2 (day 62) to month 5 (day 155). A significant negative correlation was seen between RMR and body mass in all treatment groups. Among fish of the same age, the SW-reared tilapia had significantly lower RMRs than the FW-reared fish. The MT-treated fish in SW showed significantly lower RMRs than the SW control group at months 3–5, whereas MT treatment in FW significantly increased the RMR at month 3. Comparison of regression lines between RMR and body mass indicates that MT treatment in FW caused a significant increase in oxygen consumption at a given mass of the fish, whereas MT treatment was without effect on RMR in SW-reared fish. These results clearly indicate that SW-rearing and MT treatment accelerate growth of tilapia, and that RMR decreases as fish size increased. It is also likely that the increased RMR and growth in MT-treated tilapia in FW may be due to the metabolic actions of MT, although the reason for the absence of MT treatment in SW is unclear.</description><identifier>ISSN: 1096-4959</identifier><identifier>EISSN: 1879-1107</identifier><identifier>DOI: 10.1016/S1096-4959(03)00245-8</identifier><language>eng</language><publisher>Elsevier Inc</publisher><subject>17α Methyltestosterone ; Freshwater ; Growth ; Marine ; Metabolism ; Oreochromis mossambicus ; Oxygen consumption ; Salinity ; Tilapia</subject><ispartof>Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 2003-12, Vol.136 (4), p.657-665</ispartof><rights>2003 Elsevier Inc.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c371t-b5bd0aa96ca204f4d7c7ad55b04d9b493077fd6d299342ce3085c8643c2406d93</citedby><cites>FETCH-LOGICAL-c371t-b5bd0aa96ca204f4d7c7ad55b04d9b493077fd6d299342ce3085c8643c2406d93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S1096-4959(03)00245-8$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,781,785,3551,27929,27930,46000</link.rule.ids></links><search><creatorcontrib>Sparks, Russell T.</creatorcontrib><creatorcontrib>Shepherd, Brian S.</creatorcontrib><creatorcontrib>Ron, Benny</creatorcontrib><creatorcontrib>Harold Richman, N.</creatorcontrib><creatorcontrib>Riley, Larry G.</creatorcontrib><creatorcontrib>Iwama, George K.</creatorcontrib><creatorcontrib>Hirano, Tetsuya</creatorcontrib><creatorcontrib>Gordon Grau, E.</creatorcontrib><title>Effects of environmental salinity and 17α-methyltestosterone on growth and oxygen consumption in the tilapia, Oreochromis mossambicus</title><title>Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology</title><description>Effects of environmental salinity and 17α-methyltestosterone (MT) on growth and oxygen consumption were examined in the tilapia,
Oreochromis mossambicus. Yolk-sac fry were collected from brood stock in fresh water (FW). After yolk-sac absorption, they were assigned randomly to one of four groups: FW, MT treatment in FW, seawater (SW) and MT treatment in SW. All treatment groups were fed to satiation three times daily. The fish reared in SW (both control and MT-treated groups) grew significantly larger than either group in FW from day 43 throughout the experiment (195 days). The fish fed with MT added to their feed grew significantly larger than their respective controls from day 85 in FW and in SW until the end of the experiment. The routine metabolic rate (RMR) was determined monthly from month 2 (day 62) to month 5 (day 155). A significant negative correlation was seen between RMR and body mass in all treatment groups. Among fish of the same age, the SW-reared tilapia had significantly lower RMRs than the FW-reared fish. The MT-treated fish in SW showed significantly lower RMRs than the SW control group at months 3–5, whereas MT treatment in FW significantly increased the RMR at month 3. Comparison of regression lines between RMR and body mass indicates that MT treatment in FW caused a significant increase in oxygen consumption at a given mass of the fish, whereas MT treatment was without effect on RMR in SW-reared fish. These results clearly indicate that SW-rearing and MT treatment accelerate growth of tilapia, and that RMR decreases as fish size increased. It is also likely that the increased RMR and growth in MT-treated tilapia in FW may be due to the metabolic actions of MT, although the reason for the absence of MT treatment in SW is unclear.</description><subject>17α Methyltestosterone</subject><subject>Freshwater</subject><subject>Growth</subject><subject>Marine</subject><subject>Metabolism</subject><subject>Oreochromis mossambicus</subject><subject>Oxygen consumption</subject><subject>Salinity</subject><subject>Tilapia</subject><issn>1096-4959</issn><issn>1879-1107</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNqFkUFuFDEQRVsIJELgCEheRUGiQ7ltt9urKIpCEilSFsDactvVGUfd9mB7AnMB7sNFcqY4M7CFVZVU75fq12-a9xROKND-0xcKqm-5EuoY2AeAjot2eNEc0EGqllKQL2v_F3ndvMn5HoANlNGD5tfFNKEtmcSJYHjwKYYFQzEzyWb2wZctMcERKh9_twuW1XYumEvMBSuJJAZyl-KPstpR8ef2DgOxMeTNsi6-Tn0gZYWk-NmsvflIbhNGu0px8ZksMWezjN5u8tvm1WTmjO_-1MPm2-eLr-dX7c3t5fX52U1rmaSlHcXowBjVW9MBn7iTVhonxAjcqZErBlJOrnedUox3FhkMwg49Z7bj0DvFDpuj_d51it831Ymuh1icZxMwbrKmsh8kF7SCx_8GRUc5MMVkRcUetakaSjjpdfKLSVtNQT8HpHcB6efva2B6F5Aequ50r8Nq-MFj0tl6DBadTzUS7aL_z4Ynq3ubig</recordid><startdate>20031201</startdate><enddate>20031201</enddate><creator>Sparks, Russell T.</creator><creator>Shepherd, Brian S.</creator><creator>Ron, Benny</creator><creator>Harold Richman, N.</creator><creator>Riley, Larry G.</creator><creator>Iwama, George K.</creator><creator>Hirano, Tetsuya</creator><creator>Gordon Grau, E.</creator><general>Elsevier Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope></search><sort><creationdate>20031201</creationdate><title>Effects of environmental salinity and 17α-methyltestosterone on growth and oxygen consumption in the tilapia, Oreochromis mossambicus</title><author>Sparks, Russell T. ; Shepherd, Brian S. ; Ron, Benny ; Harold Richman, N. ; Riley, Larry G. ; Iwama, George K. ; Hirano, Tetsuya ; Gordon Grau, E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c371t-b5bd0aa96ca204f4d7c7ad55b04d9b493077fd6d299342ce3085c8643c2406d93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>17α Methyltestosterone</topic><topic>Freshwater</topic><topic>Growth</topic><topic>Marine</topic><topic>Metabolism</topic><topic>Oreochromis mossambicus</topic><topic>Oxygen consumption</topic><topic>Salinity</topic><topic>Tilapia</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sparks, Russell T.</creatorcontrib><creatorcontrib>Shepherd, Brian S.</creatorcontrib><creatorcontrib>Ron, Benny</creatorcontrib><creatorcontrib>Harold Richman, N.</creatorcontrib><creatorcontrib>Riley, Larry G.</creatorcontrib><creatorcontrib>Iwama, George K.</creatorcontrib><creatorcontrib>Hirano, Tetsuya</creatorcontrib><creatorcontrib>Gordon Grau, E.</creatorcontrib><collection>CrossRef</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sparks, Russell T.</au><au>Shepherd, Brian S.</au><au>Ron, Benny</au><au>Harold Richman, N.</au><au>Riley, Larry G.</au><au>Iwama, George K.</au><au>Hirano, Tetsuya</au><au>Gordon Grau, E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of environmental salinity and 17α-methyltestosterone on growth and oxygen consumption in the tilapia, Oreochromis mossambicus</atitle><jtitle>Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology</jtitle><date>2003-12-01</date><risdate>2003</risdate><volume>136</volume><issue>4</issue><spage>657</spage><epage>665</epage><pages>657-665</pages><issn>1096-4959</issn><eissn>1879-1107</eissn><abstract>Effects of environmental salinity and 17α-methyltestosterone (MT) on growth and oxygen consumption were examined in the tilapia,
Oreochromis mossambicus. Yolk-sac fry were collected from brood stock in fresh water (FW). After yolk-sac absorption, they were assigned randomly to one of four groups: FW, MT treatment in FW, seawater (SW) and MT treatment in SW. All treatment groups were fed to satiation three times daily. The fish reared in SW (both control and MT-treated groups) grew significantly larger than either group in FW from day 43 throughout the experiment (195 days). The fish fed with MT added to their feed grew significantly larger than their respective controls from day 85 in FW and in SW until the end of the experiment. The routine metabolic rate (RMR) was determined monthly from month 2 (day 62) to month 5 (day 155). A significant negative correlation was seen between RMR and body mass in all treatment groups. Among fish of the same age, the SW-reared tilapia had significantly lower RMRs than the FW-reared fish. The MT-treated fish in SW showed significantly lower RMRs than the SW control group at months 3–5, whereas MT treatment in FW significantly increased the RMR at month 3. Comparison of regression lines between RMR and body mass indicates that MT treatment in FW caused a significant increase in oxygen consumption at a given mass of the fish, whereas MT treatment was without effect on RMR in SW-reared fish. These results clearly indicate that SW-rearing and MT treatment accelerate growth of tilapia, and that RMR decreases as fish size increased. It is also likely that the increased RMR and growth in MT-treated tilapia in FW may be due to the metabolic actions of MT, although the reason for the absence of MT treatment in SW is unclear.</abstract><pub>Elsevier Inc</pub><doi>10.1016/S1096-4959(03)00245-8</doi><tpages>9</tpages></addata></record> |
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subjects | 17α Methyltestosterone Freshwater Growth Marine Metabolism Oreochromis mossambicus Oxygen consumption Salinity Tilapia |
title | Effects of environmental salinity and 17α-methyltestosterone on growth and oxygen consumption in the tilapia, Oreochromis mossambicus |
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