Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size
Abstract For efficient production of Japanese eel Anguilla japonica eggs, knowledge of the status of the sexual maturity of potential broodstock females is important because this status directly influences the time required to produce mature eggs by successive hormone doses. Here we apply an eye ind...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Okamura, Akihiro [verfasserIn] Oka, Hideo P. [verfasserIn] Horie, Noriyuki [verfasserIn] Utoh, Tomoko [verfasserIn] Yamada, Yoshiaki [verfasserIn] Mikawa, Naomi [verfasserIn] Tanaka, Satoru [verfasserIn] Tsukamoto, Katsumi [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2008 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Aquaculture international - Dordrecht [u.a.] : Springer Science + Business Media B.V, 1993, 17(2008), 1 vom: 28. Feb., Seite 91-99 |
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| Übergeordnetes Werk: |
volume:17 ; year:2008 ; number:1 ; day:28 ; month:02 ; pages:91-99 |
| Links: |
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| DOI / URN: |
10.1007/s10499-008-9172-z |
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| Katalog-ID: |
SPR010517618 |
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| 245 | 1 | 0 | |a Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size |
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| 520 | |a Abstract For efficient production of Japanese eel Anguilla japonica eggs, knowledge of the status of the sexual maturity of potential broodstock females is important because this status directly influences the time required to produce mature eggs by successive hormone doses. Here we apply an eye index (relative eye size) to evaluate the gonadal status of feminized A. japonica, which were induced by administration of estradiol-17β. Examination of gonad somatic and eye indexes of 267 feminized eels, cultivated for 12–56 months, revealed a significant correlation between these two indexes. Artificial maturation of 35 feminized eels showed that the number of hormone injections administered before ovulation was significantly lower as the eye index score increased, indicating availability of this noninvasive method of predicting sexual maturity of feminized eel. There was no correlation between eye index and fertilization rate, hatching rate, or larval survival rate, suggesting that sexual maturity before hormonal treatment does not affect egg quality. | ||
| 650 | 4 | |a Estradiol-17β |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Eye index |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a GSI |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Induced maturation |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Fertilization |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Hatching |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Survival |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Oka, Hideo P. |e verfasserin |4 aut | |
| 700 | 1 | |a Horie, Noriyuki |e verfasserin |4 aut | |
| 700 | 1 | |a Utoh, Tomoko |e verfasserin |4 aut | |
| 700 | 1 | |a Yamada, Yoshiaki |e verfasserin |4 aut | |
| 700 | 1 | |a Mikawa, Naomi |e verfasserin |4 aut | |
| 700 | 1 | |a Tanaka, Satoru |e verfasserin |4 aut | |
| 700 | 1 | |a Tsukamoto, Katsumi |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Aquaculture international |d Dordrecht [u.a.] : Springer Science + Business Media B.V, 1993 |g 17(2008), 1 vom: 28. Feb., Seite 91-99 |w (DE-627)306314045 |w (DE-600)1496000-X |x 1573-143X |7 nnns |
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10.1007/s10499-008-9172-z doi (DE-627)SPR010517618 (SPR)s10499-008-9172-z-e DE-627 ger DE-627 rakwb eng 630 640 ASE 48.68 bkl Okamura, Akihiro verfasserin aut Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size 2008 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract For efficient production of Japanese eel Anguilla japonica eggs, knowledge of the status of the sexual maturity of potential broodstock females is important because this status directly influences the time required to produce mature eggs by successive hormone doses. Here we apply an eye index (relative eye size) to evaluate the gonadal status of feminized A. japonica, which were induced by administration of estradiol-17β. Examination of gonad somatic and eye indexes of 267 feminized eels, cultivated for 12–56 months, revealed a significant correlation between these two indexes. Artificial maturation of 35 feminized eels showed that the number of hormone injections administered before ovulation was significantly lower as the eye index score increased, indicating availability of this noninvasive method of predicting sexual maturity of feminized eel. There was no correlation between eye index and fertilization rate, hatching rate, or larval survival rate, suggesting that sexual maturity before hormonal treatment does not affect egg quality. Estradiol-17β (dpeaa)DE-He213 Eye index (dpeaa)DE-He213 GSI (dpeaa)DE-He213 Induced maturation (dpeaa)DE-He213 Fertilization (dpeaa)DE-He213 Hatching (dpeaa)DE-He213 Survival (dpeaa)DE-He213 Oka, Hideo P. verfasserin aut Horie, Noriyuki verfasserin aut Utoh, Tomoko verfasserin aut Yamada, Yoshiaki verfasserin aut Mikawa, Naomi verfasserin aut Tanaka, Satoru verfasserin aut Tsukamoto, Katsumi verfasserin aut Enthalten in Aquaculture international Dordrecht [u.a.] : Springer Science + Business Media B.V, 1993 17(2008), 1 vom: 28. Feb., Seite 91-99 (DE-627)306314045 (DE-600)1496000-X 1573-143X nnns volume:17 year:2008 number:1 day:28 month:02 pages:91-99 https://dx.doi.org/10.1007/s10499-008-9172-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 48.68 ASE AR 17 2008 1 28 02 91-99 |
| spelling |
10.1007/s10499-008-9172-z doi (DE-627)SPR010517618 (SPR)s10499-008-9172-z-e DE-627 ger DE-627 rakwb eng 630 640 ASE 48.68 bkl Okamura, Akihiro verfasserin aut Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size 2008 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract For efficient production of Japanese eel Anguilla japonica eggs, knowledge of the status of the sexual maturity of potential broodstock females is important because this status directly influences the time required to produce mature eggs by successive hormone doses. Here we apply an eye index (relative eye size) to evaluate the gonadal status of feminized A. japonica, which were induced by administration of estradiol-17β. Examination of gonad somatic and eye indexes of 267 feminized eels, cultivated for 12–56 months, revealed a significant correlation between these two indexes. Artificial maturation of 35 feminized eels showed that the number of hormone injections administered before ovulation was significantly lower as the eye index score increased, indicating availability of this noninvasive method of predicting sexual maturity of feminized eel. There was no correlation between eye index and fertilization rate, hatching rate, or larval survival rate, suggesting that sexual maturity before hormonal treatment does not affect egg quality. Estradiol-17β (dpeaa)DE-He213 Eye index (dpeaa)DE-He213 GSI (dpeaa)DE-He213 Induced maturation (dpeaa)DE-He213 Fertilization (dpeaa)DE-He213 Hatching (dpeaa)DE-He213 Survival (dpeaa)DE-He213 Oka, Hideo P. verfasserin aut Horie, Noriyuki verfasserin aut Utoh, Tomoko verfasserin aut Yamada, Yoshiaki verfasserin aut Mikawa, Naomi verfasserin aut Tanaka, Satoru verfasserin aut Tsukamoto, Katsumi verfasserin aut Enthalten in Aquaculture international Dordrecht [u.a.] : Springer Science + Business Media B.V, 1993 17(2008), 1 vom: 28. Feb., Seite 91-99 (DE-627)306314045 (DE-600)1496000-X 1573-143X nnns volume:17 year:2008 number:1 day:28 month:02 pages:91-99 https://dx.doi.org/10.1007/s10499-008-9172-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 48.68 ASE AR 17 2008 1 28 02 91-99 |
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10.1007/s10499-008-9172-z doi (DE-627)SPR010517618 (SPR)s10499-008-9172-z-e DE-627 ger DE-627 rakwb eng 630 640 ASE 48.68 bkl Okamura, Akihiro verfasserin aut Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size 2008 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract For efficient production of Japanese eel Anguilla japonica eggs, knowledge of the status of the sexual maturity of potential broodstock females is important because this status directly influences the time required to produce mature eggs by successive hormone doses. Here we apply an eye index (relative eye size) to evaluate the gonadal status of feminized A. japonica, which were induced by administration of estradiol-17β. Examination of gonad somatic and eye indexes of 267 feminized eels, cultivated for 12–56 months, revealed a significant correlation between these two indexes. Artificial maturation of 35 feminized eels showed that the number of hormone injections administered before ovulation was significantly lower as the eye index score increased, indicating availability of this noninvasive method of predicting sexual maturity of feminized eel. There was no correlation between eye index and fertilization rate, hatching rate, or larval survival rate, suggesting that sexual maturity before hormonal treatment does not affect egg quality. Estradiol-17β (dpeaa)DE-He213 Eye index (dpeaa)DE-He213 GSI (dpeaa)DE-He213 Induced maturation (dpeaa)DE-He213 Fertilization (dpeaa)DE-He213 Hatching (dpeaa)DE-He213 Survival (dpeaa)DE-He213 Oka, Hideo P. verfasserin aut Horie, Noriyuki verfasserin aut Utoh, Tomoko verfasserin aut Yamada, Yoshiaki verfasserin aut Mikawa, Naomi verfasserin aut Tanaka, Satoru verfasserin aut Tsukamoto, Katsumi verfasserin aut Enthalten in Aquaculture international Dordrecht [u.a.] : Springer Science + Business Media B.V, 1993 17(2008), 1 vom: 28. Feb., Seite 91-99 (DE-627)306314045 (DE-600)1496000-X 1573-143X nnns volume:17 year:2008 number:1 day:28 month:02 pages:91-99 https://dx.doi.org/10.1007/s10499-008-9172-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 48.68 ASE AR 17 2008 1 28 02 91-99 |
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10.1007/s10499-008-9172-z doi (DE-627)SPR010517618 (SPR)s10499-008-9172-z-e DE-627 ger DE-627 rakwb eng 630 640 ASE 48.68 bkl Okamura, Akihiro verfasserin aut Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size 2008 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract For efficient production of Japanese eel Anguilla japonica eggs, knowledge of the status of the sexual maturity of potential broodstock females is important because this status directly influences the time required to produce mature eggs by successive hormone doses. Here we apply an eye index (relative eye size) to evaluate the gonadal status of feminized A. japonica, which were induced by administration of estradiol-17β. Examination of gonad somatic and eye indexes of 267 feminized eels, cultivated for 12–56 months, revealed a significant correlation between these two indexes. Artificial maturation of 35 feminized eels showed that the number of hormone injections administered before ovulation was significantly lower as the eye index score increased, indicating availability of this noninvasive method of predicting sexual maturity of feminized eel. There was no correlation between eye index and fertilization rate, hatching rate, or larval survival rate, suggesting that sexual maturity before hormonal treatment does not affect egg quality. Estradiol-17β (dpeaa)DE-He213 Eye index (dpeaa)DE-He213 GSI (dpeaa)DE-He213 Induced maturation (dpeaa)DE-He213 Fertilization (dpeaa)DE-He213 Hatching (dpeaa)DE-He213 Survival (dpeaa)DE-He213 Oka, Hideo P. verfasserin aut Horie, Noriyuki verfasserin aut Utoh, Tomoko verfasserin aut Yamada, Yoshiaki verfasserin aut Mikawa, Naomi verfasserin aut Tanaka, Satoru verfasserin aut Tsukamoto, Katsumi verfasserin aut Enthalten in Aquaculture international Dordrecht [u.a.] : Springer Science + Business Media B.V, 1993 17(2008), 1 vom: 28. Feb., Seite 91-99 (DE-627)306314045 (DE-600)1496000-X 1573-143X nnns volume:17 year:2008 number:1 day:28 month:02 pages:91-99 https://dx.doi.org/10.1007/s10499-008-9172-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 48.68 ASE AR 17 2008 1 28 02 91-99 |
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10.1007/s10499-008-9172-z doi (DE-627)SPR010517618 (SPR)s10499-008-9172-z-e DE-627 ger DE-627 rakwb eng 630 640 ASE 48.68 bkl Okamura, Akihiro verfasserin aut Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size 2008 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract For efficient production of Japanese eel Anguilla japonica eggs, knowledge of the status of the sexual maturity of potential broodstock females is important because this status directly influences the time required to produce mature eggs by successive hormone doses. Here we apply an eye index (relative eye size) to evaluate the gonadal status of feminized A. japonica, which were induced by administration of estradiol-17β. Examination of gonad somatic and eye indexes of 267 feminized eels, cultivated for 12–56 months, revealed a significant correlation between these two indexes. Artificial maturation of 35 feminized eels showed that the number of hormone injections administered before ovulation was significantly lower as the eye index score increased, indicating availability of this noninvasive method of predicting sexual maturity of feminized eel. There was no correlation between eye index and fertilization rate, hatching rate, or larval survival rate, suggesting that sexual maturity before hormonal treatment does not affect egg quality. Estradiol-17β (dpeaa)DE-He213 Eye index (dpeaa)DE-He213 GSI (dpeaa)DE-He213 Induced maturation (dpeaa)DE-He213 Fertilization (dpeaa)DE-He213 Hatching (dpeaa)DE-He213 Survival (dpeaa)DE-He213 Oka, Hideo P. verfasserin aut Horie, Noriyuki verfasserin aut Utoh, Tomoko verfasserin aut Yamada, Yoshiaki verfasserin aut Mikawa, Naomi verfasserin aut Tanaka, Satoru verfasserin aut Tsukamoto, Katsumi verfasserin aut Enthalten in Aquaculture international Dordrecht [u.a.] : Springer Science + Business Media B.V, 1993 17(2008), 1 vom: 28. Feb., Seite 91-99 (DE-627)306314045 (DE-600)1496000-X 1573-143X nnns volume:17 year:2008 number:1 day:28 month:02 pages:91-99 https://dx.doi.org/10.1007/s10499-008-9172-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 48.68 ASE AR 17 2008 1 28 02 91-99 |
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Enthalten in Aquaculture international 17(2008), 1 vom: 28. Feb., Seite 91-99 volume:17 year:2008 number:1 day:28 month:02 pages:91-99 |
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Estradiol-17β Eye index GSI Induced maturation Fertilization Hatching Survival |
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Okamura, Akihiro @@aut@@ Oka, Hideo P. @@aut@@ Horie, Noriyuki @@aut@@ Utoh, Tomoko @@aut@@ Yamada, Yoshiaki @@aut@@ Mikawa, Naomi @@aut@@ Tanaka, Satoru @@aut@@ Tsukamoto, Katsumi @@aut@@ |
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|
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Okamura, Akihiro |
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Okamura, Akihiro ddc 630 bkl 48.68 misc Estradiol-17β misc Eye index misc GSI misc Induced maturation misc Fertilization misc Hatching misc Survival Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size |
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630 640 ASE 48.68 bkl Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size Estradiol-17β (dpeaa)DE-He213 Eye index (dpeaa)DE-He213 GSI (dpeaa)DE-He213 Induced maturation (dpeaa)DE-He213 Fertilization (dpeaa)DE-He213 Hatching (dpeaa)DE-He213 Survival (dpeaa)DE-He213 |
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Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size |
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Okamura, Akihiro Oka, Hideo P. Horie, Noriyuki Utoh, Tomoko Yamada, Yoshiaki Mikawa, Naomi Tanaka, Satoru Tsukamoto, Katsumi |
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assessing sexual maturity of feminized japanese eel anguilla japonica by measuring eye size |
| title_auth |
Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size |
| abstract |
Abstract For efficient production of Japanese eel Anguilla japonica eggs, knowledge of the status of the sexual maturity of potential broodstock females is important because this status directly influences the time required to produce mature eggs by successive hormone doses. Here we apply an eye index (relative eye size) to evaluate the gonadal status of feminized A. japonica, which were induced by administration of estradiol-17β. Examination of gonad somatic and eye indexes of 267 feminized eels, cultivated for 12–56 months, revealed a significant correlation between these two indexes. Artificial maturation of 35 feminized eels showed that the number of hormone injections administered before ovulation was significantly lower as the eye index score increased, indicating availability of this noninvasive method of predicting sexual maturity of feminized eel. There was no correlation between eye index and fertilization rate, hatching rate, or larval survival rate, suggesting that sexual maturity before hormonal treatment does not affect egg quality. |
| abstractGer |
Abstract For efficient production of Japanese eel Anguilla japonica eggs, knowledge of the status of the sexual maturity of potential broodstock females is important because this status directly influences the time required to produce mature eggs by successive hormone doses. Here we apply an eye index (relative eye size) to evaluate the gonadal status of feminized A. japonica, which were induced by administration of estradiol-17β. Examination of gonad somatic and eye indexes of 267 feminized eels, cultivated for 12–56 months, revealed a significant correlation between these two indexes. Artificial maturation of 35 feminized eels showed that the number of hormone injections administered before ovulation was significantly lower as the eye index score increased, indicating availability of this noninvasive method of predicting sexual maturity of feminized eel. There was no correlation between eye index and fertilization rate, hatching rate, or larval survival rate, suggesting that sexual maturity before hormonal treatment does not affect egg quality. |
| abstract_unstemmed |
Abstract For efficient production of Japanese eel Anguilla japonica eggs, knowledge of the status of the sexual maturity of potential broodstock females is important because this status directly influences the time required to produce mature eggs by successive hormone doses. Here we apply an eye index (relative eye size) to evaluate the gonadal status of feminized A. japonica, which were induced by administration of estradiol-17β. Examination of gonad somatic and eye indexes of 267 feminized eels, cultivated for 12–56 months, revealed a significant correlation between these two indexes. Artificial maturation of 35 feminized eels showed that the number of hormone injections administered before ovulation was significantly lower as the eye index score increased, indicating availability of this noninvasive method of predicting sexual maturity of feminized eel. There was no correlation between eye index and fertilization rate, hatching rate, or larval survival rate, suggesting that sexual maturity before hormonal treatment does not affect egg quality. |
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| title_short |
Assessing sexual maturity of feminized Japanese eel Anguilla japonica by measuring eye size |
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https://dx.doi.org/10.1007/s10499-008-9172-z |
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true |
| author2 |
Oka, Hideo P. Horie, Noriyuki Utoh, Tomoko Yamada, Yoshiaki Mikawa, Naomi Tanaka, Satoru Tsukamoto, Katsumi |
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Oka, Hideo P. Horie, Noriyuki Utoh, Tomoko Yamada, Yoshiaki Mikawa, Naomi Tanaka, Satoru Tsukamoto, Katsumi |
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2024-07-03T16:38:22.876Z |
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| score |
7.3985224 |