Morphological and physiological studies on sex change in tropical fish: Sexual plasticity of the ovaries of hermaphroditic and gonochoristic fish
To clarify the role of estrogens in the onset of sex change in fish, estrogen levels were artificially reduced in hermaphroditic and gonochoristic female fish via the treatment with aromatase inhibitors (AIs). AI treatments caused depletion in blood estrogen levels and induced complete sex change fr...
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| Veröffentlicht in: | Galaxea : journal of coral reef studies Journal of Coral Reef Studies, 2022/01/31, Vol.24(1), pp.5-17 |
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| creator | Nakamura, Masaru Nozu, Ryo Nakamura, Shigeo Higa, Mikihiko Bhandari, Ramji K Kobayashi, Yasuhisa Horiguchi, Ryo Komatsu, Toru Kojima, Yutaka Murata, Ryosuke Soyano, Kiyoshi Ogawa, Satoshi Hirai, Toshiaki Matsubara, Hajime Tokumoto, Toshinobu Kobayashi, Tohru Kagawa, Hirohiko Adachi, Shinji Yamauchi, Kohei Nagahama, Yoshitaka |
| description | To clarify the role of estrogens in the onset of sex change in fish, estrogen levels were artificially reduced in hermaphroditic and gonochoristic female fish via the treatment with aromatase inhibitors (AIs). AI treatments caused depletion in blood estrogen levels and induced complete sex change from a female to a male in protogynous three-spotted wrasse and the honeycomb grouper. Opposite-direction sex change of the protandrous yellowtail anemonefish was also induced by AI treatments. Not only in hermaphrodites, AI treatments induced testicular differentiation and, in certain circumstances, a complete sex change in the developing ovaries of the gonochoristic fish: tilapia, medaka, zebrafish, carp and golden rabbitfish. We demonstrated that estrogen depletion induces the female to male sex change in both hermaphroditic and gonochoristic fish. Results suggested that some germ cells in the ovaries of both hermaphroditic and gonochoristic fish maintain sexual bipotentiality, which is the ability to differentiate into both female and male germ cells, throughout the life and that the fate of these germ cells' differentiation depends on the level of endogenous estrogen. Higher levels of circulating estrogen maintain femaleness, while lower levels force their differentiation into males. These studies contribute to the progress of aquaculture. |
| doi_str_mv | 10.3755/galaxea.G2021_S6R |
| format | Article |
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AI treatments caused depletion in blood estrogen levels and induced complete sex change from a female to a male in protogynous three-spotted wrasse and the honeycomb grouper. Opposite-direction sex change of the protandrous yellowtail anemonefish was also induced by AI treatments. Not only in hermaphrodites, AI treatments induced testicular differentiation and, in certain circumstances, a complete sex change in the developing ovaries of the gonochoristic fish: tilapia, medaka, zebrafish, carp and golden rabbitfish. We demonstrated that estrogen depletion induces the female to male sex change in both hermaphroditic and gonochoristic fish. Results suggested that some germ cells in the ovaries of both hermaphroditic and gonochoristic fish maintain sexual bipotentiality, which is the ability to differentiate into both female and male germ cells, throughout the life and that the fate of these germ cells' differentiation depends on the level of endogenous estrogen. Higher levels of circulating estrogen maintain femaleness, while lower levels force their differentiation into males. These studies contribute to the progress of aquaculture.</description><identifier>ISSN: 1883-0838</identifier><identifier>EISSN: 1883-3969</identifier><identifier>DOI: 10.3755/galaxea.G2021_S6R</identifier><language>eng</language><publisher>Tokyo: The Japanese Coral Reef Society</publisher><subject>Aquaculture ; Aromatase inhibitor ; Cells ; Depletion ; Estrogen ; Estrogens ; Females ; Fish ; Freshwater fishes ; Hermaphroditism ; Males ; Marine fishes ; Oestrogens ; Ovaries ; Ovary ; Plasticity ; Polyculture (aquaculture) ; Protandry ; Reproduction ; Sex ; Sex change ; Sex hormones ; Sex reversal ; Testis ; Tropical climate ; Tropical fish ; Tropical fishes ; Whitefish</subject><ispartof>Galaxea, Journal of Coral Reef Studies, 2022/01/31, Vol.24(1), pp.5-17</ispartof><rights>2022 The Japanese Coral Reef Society</rights><rights>Copyright Japan Science and Technology Agency 2022</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c376r-eff4867e6d2fd0f311f676abb85291536f31dac939c1997ea7f5f592b2ea6d923</citedby><cites>FETCH-LOGICAL-c376r-eff4867e6d2fd0f311f676abb85291536f31dac939c1997ea7f5f592b2ea6d923</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,1877,27901,27902</link.rule.ids></links><search><creatorcontrib>Nakamura, Masaru</creatorcontrib><creatorcontrib>Nozu, Ryo</creatorcontrib><creatorcontrib>Nakamura, Shigeo</creatorcontrib><creatorcontrib>Higa, Mikihiko</creatorcontrib><creatorcontrib>Bhandari, Ramji K</creatorcontrib><creatorcontrib>Kobayashi, Yasuhisa</creatorcontrib><creatorcontrib>Horiguchi, Ryo</creatorcontrib><creatorcontrib>Komatsu, Toru</creatorcontrib><creatorcontrib>Kojima, Yutaka</creatorcontrib><creatorcontrib>Murata, Ryosuke</creatorcontrib><creatorcontrib>Soyano, Kiyoshi</creatorcontrib><creatorcontrib>Ogawa, Satoshi</creatorcontrib><creatorcontrib>Hirai, Toshiaki</creatorcontrib><creatorcontrib>Matsubara, Hajime</creatorcontrib><creatorcontrib>Tokumoto, Toshinobu</creatorcontrib><creatorcontrib>Kobayashi, Tohru</creatorcontrib><creatorcontrib>Kagawa, Hirohiko</creatorcontrib><creatorcontrib>Adachi, Shinji</creatorcontrib><creatorcontrib>Yamauchi, Kohei</creatorcontrib><creatorcontrib>Nagahama, Yoshitaka</creatorcontrib><title>Morphological and physiological studies on sex change in tropical fish: Sexual plasticity of the ovaries of hermaphroditic and gonochoristic fish</title><title>Galaxea : journal of coral reef studies</title><addtitle>Galaxea, Journal of Coral Reef Studies</addtitle><description>To clarify the role of estrogens in the onset of sex change in fish, estrogen levels were artificially reduced in hermaphroditic and gonochoristic female fish via the treatment with aromatase inhibitors (AIs). AI treatments caused depletion in blood estrogen levels and induced complete sex change from a female to a male in protogynous three-spotted wrasse and the honeycomb grouper. Opposite-direction sex change of the protandrous yellowtail anemonefish was also induced by AI treatments. Not only in hermaphrodites, AI treatments induced testicular differentiation and, in certain circumstances, a complete sex change in the developing ovaries of the gonochoristic fish: tilapia, medaka, zebrafish, carp and golden rabbitfish. We demonstrated that estrogen depletion induces the female to male sex change in both hermaphroditic and gonochoristic fish. Results suggested that some germ cells in the ovaries of both hermaphroditic and gonochoristic fish maintain sexual bipotentiality, which is the ability to differentiate into both female and male germ cells, throughout the life and that the fate of these germ cells' differentiation depends on the level of endogenous estrogen. Higher levels of circulating estrogen maintain femaleness, while lower levels force their differentiation into males. These studies contribute to the progress of aquaculture.</description><subject>Aquaculture</subject><subject>Aromatase inhibitor</subject><subject>Cells</subject><subject>Depletion</subject><subject>Estrogen</subject><subject>Estrogens</subject><subject>Females</subject><subject>Fish</subject><subject>Freshwater fishes</subject><subject>Hermaphroditism</subject><subject>Males</subject><subject>Marine fishes</subject><subject>Oestrogens</subject><subject>Ovaries</subject><subject>Ovary</subject><subject>Plasticity</subject><subject>Polyculture (aquaculture)</subject><subject>Protandry</subject><subject>Reproduction</subject><subject>Sex</subject><subject>Sex change</subject><subject>Sex hormones</subject><subject>Sex reversal</subject><subject>Testis</subject><subject>Tropical climate</subject><subject>Tropical fish</subject><subject>Tropical fishes</subject><subject>Whitefish</subject><issn>1883-0838</issn><issn>1883-3969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp9kctOwzAQRSMEEuXxAewssS7Edm3H7BCCglSExGNtTZNx4iqNg52i9jP4Y9KHsmRje0bnzEi-SXJF0xuuhLgtoYY1ws2UpYyaD_l-lIxolvEx11IfH95pxrPT5CzGRZrKTFM1Sn5ffWgrX_vS5VATaArSVpvohk7sVoXDSHxDIq5JXkFTInEN6YJvd4R1sbojH7he9UVbQ-xc7roN8ZZ0FRL_A2E3wJIKwxLaKvjC9cxuWekbn1c-uK21G3WRnFioI14e7vPk6-nx8-F5PHubvjzcz8Y5VzKM0dpJJhXKgtkitZxSK5WE-TwTTFPBZd8qINdc51RrhaCssEKzOUOQhWb8PLnez22D_15h7MzCr0LTrzRMiYmQimfqX0qyidSCC9FTdE_lwccY0Jo2uCWEjaGp2eZjDvmYIZ_eme6dReygxMGA0P9EjYPBJoZuj8EciD6LYLDhfxE0oqc</recordid><startdate>20220131</startdate><enddate>20220131</enddate><creator>Nakamura, Masaru</creator><creator>Nozu, Ryo</creator><creator>Nakamura, Shigeo</creator><creator>Higa, Mikihiko</creator><creator>Bhandari, Ramji K</creator><creator>Kobayashi, Yasuhisa</creator><creator>Horiguchi, Ryo</creator><creator>Komatsu, Toru</creator><creator>Kojima, Yutaka</creator><creator>Murata, Ryosuke</creator><creator>Soyano, Kiyoshi</creator><creator>Ogawa, Satoshi</creator><creator>Hirai, Toshiaki</creator><creator>Matsubara, Hajime</creator><creator>Tokumoto, Toshinobu</creator><creator>Kobayashi, Tohru</creator><creator>Kagawa, Hirohiko</creator><creator>Adachi, Shinji</creator><creator>Yamauchi, Kohei</creator><creator>Nagahama, Yoshitaka</creator><general>The Japanese Coral Reef Society</general><general>Japan Science and Technology Agency</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>F1W</scope></search><sort><creationdate>20220131</creationdate><title>Morphological and physiological studies on sex change in tropical fish: Sexual plasticity of the ovaries of hermaphroditic and gonochoristic fish</title><author>Nakamura, Masaru ; 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AI treatments caused depletion in blood estrogen levels and induced complete sex change from a female to a male in protogynous three-spotted wrasse and the honeycomb grouper. Opposite-direction sex change of the protandrous yellowtail anemonefish was also induced by AI treatments. Not only in hermaphrodites, AI treatments induced testicular differentiation and, in certain circumstances, a complete sex change in the developing ovaries of the gonochoristic fish: tilapia, medaka, zebrafish, carp and golden rabbitfish. We demonstrated that estrogen depletion induces the female to male sex change in both hermaphroditic and gonochoristic fish. Results suggested that some germ cells in the ovaries of both hermaphroditic and gonochoristic fish maintain sexual bipotentiality, which is the ability to differentiate into both female and male germ cells, throughout the life and that the fate of these germ cells' differentiation depends on the level of endogenous estrogen. Higher levels of circulating estrogen maintain femaleness, while lower levels force their differentiation into males. These studies contribute to the progress of aquaculture.</abstract><cop>Tokyo</cop><pub>The Japanese Coral Reef Society</pub><doi>10.3755/galaxea.G2021_S6R</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 1883-0838 |
| ispartof | Galaxea, Journal of Coral Reef Studies, 2022/01/31, Vol.24(1), pp.5-17 |
| issn | 1883-0838 1883-3969 |
| language | eng |
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| source | J-STAGE (Japan Science & Technology Information Aggregator, Electronic) Freely Available Titles - Japanese; EZB-FREE-00999 freely available EZB journals |
| subjects | Aquaculture Aromatase inhibitor Cells Depletion Estrogen Estrogens Females Fish Freshwater fishes Hermaphroditism Males Marine fishes Oestrogens Ovaries Ovary Plasticity Polyculture (aquaculture) Protandry Reproduction Sex Sex change Sex hormones Sex reversal Testis Tropical climate Tropical fish Tropical fishes Whitefish |
| title | Morphological and physiological studies on sex change in tropical fish: Sexual plasticity of the ovaries of hermaphroditic and gonochoristic fish |
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