Feminization of the Nile tilapia Oreochromis niloticus by estradiol-17β Effects on growth, gonadal development and body composition
Abstract Conditions for the feminization of undifferentiated XY fry of Nile tilapia (Oreochromis niloticus) fed on a diet supplemented with estradiol-17β (E2) were investigated in order to produce functional phenotypical females (genetic males). Different E2 concentrations (60 and 120 mg kg-1) were...
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| Veröffentlicht in: | Hidrobiológica 2015-01, Vol.25 (2), p.275-283 |
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| creator | Alcántar-Vázquez, J P Rueda-Curiel, P Antonio-Estrada, C Moreno-de la Torre, R |
| description | Abstract Conditions for the feminization of undifferentiated XY fry of Nile tilapia (Oreochromis niloticus) fed on a diet supplemented with estradiol-17β (E2) were investigated in order to produce functional phenotypical females (genetic males). Different E2 concentrations (60 and 120 mg kg-1) were tested over a period of 30 days in a closed recirculating system. Fry were fed ad libitum at 1-h intervals. The effects on growth, gonadal development and body composition were evaluated at sexual maturity. Sex-reversed females were produced in both E2 treatments. The proportion of males was significantly lower (p < 0.05) in both E2 treatments compared to the control group. Fish with atypical papilla and normal ovaries were produced in both E2 concentrations. These fish were considered sex-reversed females. Growth was significantly higher (p < 0.05) in the males compared to both the females and the sex-reversed ones in all groups analyzed. No testicular tissue was observed in any of the ovaries of the sex-reversed females analyzed. The percentage of fat in muscle increased and that of protein decreased significantly (p < 0.05) in the sex-reversed females compared to that observed in the control group. Identified sex-reversed females will be used in the production of YY males through mating with normal males, as part of a developing breeding program to produce a male genetic population in the southern region of Mexico. |
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Different E2 concentrations (60 and 120 mg kg-1) were tested over a period of 30 days in a closed recirculating system. Fry were fed ad libitum at 1-h intervals. The effects on growth, gonadal development and body composition were evaluated at sexual maturity. Sex-reversed females were produced in both E2 treatments. The proportion of males was significantly lower (p < 0.05) in both E2 treatments compared to the control group. Fish with atypical papilla and normal ovaries were produced in both E2 concentrations. These fish were considered sex-reversed females. Growth was significantly higher (p < 0.05) in the males compared to both the females and the sex-reversed ones in all groups analyzed. No testicular tissue was observed in any of the ovaries of the sex-reversed females analyzed. The percentage of fat in muscle increased and that of protein decreased significantly (p < 0.05) in the sex-reversed females compared to that observed in the control group. Identified sex-reversed females will be used in the production of YY males through mating with normal males, as part of a developing breeding program to produce a male genetic population in the southern region of Mexico.</description><identifier>ISSN: 0188-8897</identifier><identifier>EISSN: 2448-7333</identifier><language>eng</language><publisher>Mexico City: UAM, Unidad Iztapalapa</publisher><subject>Body condition ; Fish culture ; Marine ; Marine & Freshwater Biology ; Oreochromis niloticus ; Sex hormones ; Sex reversal</subject><ispartof>Hidrobiológica, 2015-01, Vol.25 (2), p.275-283</ispartof><rights>Copyright 2015</rights><rights>This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881</link.rule.ids></links><search><creatorcontrib>Alcántar-Vázquez, J P</creatorcontrib><creatorcontrib>Rueda-Curiel, P</creatorcontrib><creatorcontrib>Antonio-Estrada, C</creatorcontrib><creatorcontrib>Moreno-de la Torre, R</creatorcontrib><title>Feminization of the Nile tilapia Oreochromis niloticus by estradiol-17β Effects on growth, gonadal development and body composition</title><title>Hidrobiológica</title><addtitle>Hidrobiológica</addtitle><description>Abstract Conditions for the feminization of undifferentiated XY fry of Nile tilapia (Oreochromis niloticus) fed on a diet supplemented with estradiol-17β (E2) were investigated in order to produce functional phenotypical females (genetic males). Different E2 concentrations (60 and 120 mg kg-1) were tested over a period of 30 days in a closed recirculating system. Fry were fed ad libitum at 1-h intervals. The effects on growth, gonadal development and body composition were evaluated at sexual maturity. Sex-reversed females were produced in both E2 treatments. The proportion of males was significantly lower (p < 0.05) in both E2 treatments compared to the control group. Fish with atypical papilla and normal ovaries were produced in both E2 concentrations. These fish were considered sex-reversed females. Growth was significantly higher (p < 0.05) in the males compared to both the females and the sex-reversed ones in all groups analyzed. No testicular tissue was observed in any of the ovaries of the sex-reversed females analyzed. The percentage of fat in muscle increased and that of protein decreased significantly (p < 0.05) in the sex-reversed females compared to that observed in the control group. Identified sex-reversed females will be used in the production of YY males through mating with normal males, as part of a developing breeding program to produce a male genetic population in the southern region of Mexico.</description><subject>Body condition</subject><subject>Fish culture</subject><subject>Marine</subject><subject>Marine & Freshwater Biology</subject><subject>Oreochromis niloticus</subject><subject>Sex hormones</subject><subject>Sex reversal</subject><issn>0188-8897</issn><issn>2448-7333</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNpFkM1KAzEUhYMoWKvvcMGtI_mbJllKaVUodqGuSyY_bcrMZJykSl37RD6Iz-SUCsKBu_rOueecoBHlXBaCMXaKRphIWUipxDm6SGmLcanUBI_Q19w1oQ2fOofYQvSQNw6eQu0gh1p3QcOyd9Fs-tiEBG2oYw5ml6Dag0u51zbEuiDi5xtm3juTEww26z5-5M0NrGOrra7BundXx65xbQbdWqii3YOJTRdTOOReojOv6-Su_u4Yvc5nL9OHYrG8f5zeLYqOUpoLwisqJ8J7jjmTjHtlqWLCViVxJeeKG4Yd1Z4wLLjBwlOhSo6NdtYS7S0bo9ujbzJheGi1jbu-HQJXz4d5Vod5KCYlxpgOEuUAXB-Bro9vu6HwP0IJU5gwIjn7BcbWbbI</recordid><startdate>20150101</startdate><enddate>20150101</enddate><creator>Alcántar-Vázquez, J P</creator><creator>Rueda-Curiel, P</creator><creator>Antonio-Estrada, C</creator><creator>Moreno-de la Torre, R</creator><general>UAM, Unidad Iztapalapa</general><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H95</scope><scope>H96</scope><scope>H97</scope><scope>H98</scope><scope>H99</scope><scope>L.F</scope><scope>L.G</scope><scope>P64</scope><scope>GPN</scope></search><sort><creationdate>20150101</creationdate><title>Feminization of the Nile tilapia Oreochromis niloticus by estradiol-17β Effects on growth, gonadal development and body composition</title><author>Alcántar-Vázquez, J P ; Rueda-Curiel, P ; Antonio-Estrada, C ; Moreno-de la Torre, R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p222t-14b2867ff4043834f9d2937db51e54494c30e2af13074c07f279540caedd1afd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Body condition</topic><topic>Fish culture</topic><topic>Marine</topic><topic>Marine & Freshwater Biology</topic><topic>Oreochromis niloticus</topic><topic>Sex hormones</topic><topic>Sex reversal</topic><toplevel>online_resources</toplevel><creatorcontrib>Alcántar-Vázquez, J P</creatorcontrib><creatorcontrib>Rueda-Curiel, P</creatorcontrib><creatorcontrib>Antonio-Estrada, C</creatorcontrib><creatorcontrib>Moreno-de la Torre, R</creatorcontrib><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Aquaculture Abstracts</collection><collection>ASFA: Marine Biotechnology Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Marine Biotechnology Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>SciELO</collection><jtitle>Hidrobiológica</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Alcántar-Vázquez, J P</au><au>Rueda-Curiel, P</au><au>Antonio-Estrada, C</au><au>Moreno-de la Torre, R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Feminization of the Nile tilapia Oreochromis niloticus by estradiol-17β Effects on growth, gonadal development and body composition</atitle><jtitle>Hidrobiológica</jtitle><addtitle>Hidrobiológica</addtitle><date>2015-01-01</date><risdate>2015</risdate><volume>25</volume><issue>2</issue><spage>275</spage><epage>283</epage><pages>275-283</pages><issn>0188-8897</issn><eissn>2448-7333</eissn><abstract>Abstract Conditions for the feminization of undifferentiated XY fry of Nile tilapia (Oreochromis niloticus) fed on a diet supplemented with estradiol-17β (E2) were investigated in order to produce functional phenotypical females (genetic males). Different E2 concentrations (60 and 120 mg kg-1) were tested over a period of 30 days in a closed recirculating system. Fry were fed ad libitum at 1-h intervals. The effects on growth, gonadal development and body composition were evaluated at sexual maturity. Sex-reversed females were produced in both E2 treatments. The proportion of males was significantly lower (p < 0.05) in both E2 treatments compared to the control group. Fish with atypical papilla and normal ovaries were produced in both E2 concentrations. These fish were considered sex-reversed females. Growth was significantly higher (p < 0.05) in the males compared to both the females and the sex-reversed ones in all groups analyzed. No testicular tissue was observed in any of the ovaries of the sex-reversed females analyzed. The percentage of fat in muscle increased and that of protein decreased significantly (p < 0.05) in the sex-reversed females compared to that observed in the control group. Identified sex-reversed females will be used in the production of YY males through mating with normal males, as part of a developing breeding program to produce a male genetic population in the southern region of Mexico.</abstract><cop>Mexico City</cop><pub>UAM, Unidad Iztapalapa</pub><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Body condition Fish culture Marine Marine & Freshwater Biology Oreochromis niloticus Sex hormones Sex reversal |
| title | Feminization of the Nile tilapia Oreochromis niloticus by estradiol-17β Effects on growth, gonadal development and body composition |
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