Effect of the primary cooling rate on the motility and fertility of frozen-thawed rabbit spermatozoa
<p<In the present study, we examined the effect of primary cooling rates on the motility and fertility of frozen-thawed rabbit spermatozoa. Rabbit semen diluted with an egg-yolk acetamide extender was cooled from room temperature to 5°C at four different rates (-0.1, -0.2, -0.4, -0.8°C/min) as...
Ausführliche Beschreibung
Autor*in: |
Tatsuhiro Maeda [verfasserIn] Enqi Liu [verfasserIn] Kazutoshi Nishijima [verfasserIn] Shinji Yamaguchi [verfasserIn] Masatoshi Morimoto [verfasserIn] Teruo Watanabe [verfasserIn] Jianglin Fan [verfasserIn] Shuji Kitajima [verfasserIn] |
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E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2012 |
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Schlagwörter: |
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Übergeordnetes Werk: |
In: World Rabbit Science - Universitat Politècnica de València, 2020, 20(2012), 2, Seite 65-70 |
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Übergeordnetes Werk: |
volume:20 ; year:2012 ; number:2 ; pages:65-70 |
Links: |
Link aufrufen |
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DOI / URN: |
10.4995/wrs.2012.1080 |
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Katalog-ID: |
DOAJ035538562 |
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10.4995/wrs.2012.1080 doi (DE-627)DOAJ035538562 (DE-599)DOAJ4e5494cbcd964cfb8570a058f9157219 DE-627 ger DE-627 rakwb eng SF1-1100 SF600-1100 Tatsuhiro Maeda verfasserin aut Effect of the primary cooling rate on the motility and fertility of frozen-thawed rabbit spermatozoa 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<In the present study, we examined the effect of primary cooling rates on the motility and fertility of frozen-thawed rabbit spermatozoa. Rabbit semen diluted with an egg-yolk acetamide extender was cooled from room temperature to 5°C at four different rates (-0.1, -0.2, -0.4, -0.8°C/min) as a primary cooling step, then semen was frozen in liquid nitrogen vapour. After thawing, sperm cooled at -0.1°C/min showed the highest motility (40.7 ± 7.3%); there were no significant differences between the motilities of the -0.1, -0.2, and -0.4°C/min groups. The motility of frozen-thawed sperm cooled at -0.8°C/min (29.2 ± 6.8%) was significantly lower than that of sperm cooled at -0.1 and -0.2°C/min. The viability (-0.1°C/min, 38.1 ± 4.0%; -0.8°C/min, 24.3 ± 7.3%) of frozen-thawed sperm was closely related to its motility (-0.1°C/min, 36.7 ± 7.2%; -0.8°C/min, 22.3 ± 4.7%). Quality of post-thaw motile sperm cooled at different rates was estimated by comparing the fertilisation ability of the -0.1 and -0.8°C/min groups following artificial insemination. There were no significant differences in pregnancy rates and mean litter sizes. These data suggest that cooling rabbit semen at rates ranging from -0.1 to -0.8°C/min affects the viability but not the fertilisation capacity of motile spermatozoa after thawing.</p< cryopreservation cooling rate motility spermatozoa Animal culture Veterinary medicine Enqi Liu verfasserin aut Kazutoshi Nishijima verfasserin aut Shinji Yamaguchi verfasserin aut Masatoshi Morimoto verfasserin aut Teruo Watanabe verfasserin aut Jianglin Fan verfasserin aut Shuji Kitajima verfasserin aut In World Rabbit Science Universitat Politècnica de València, 2020 20(2012), 2, Seite 65-70 (DE-627)737292687 (DE-600)2705011-7 19898886 nnns volume:20 year:2012 number:2 pages:65-70 https://doi.org/10.4995/wrs.2012.1080 kostenfrei https://doaj.org/article/4e5494cbcd964cfb8570a058f9157219 kostenfrei http://polipapers.upv.es/index.php/wrs/article/view/1080 kostenfrei https://doaj.org/toc/1257-5011 Journal toc kostenfrei https://doaj.org/toc/1989-8886 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 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_4367 GBV_ILN_4700 AR 20 2012 2 65-70 |
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10.4995/wrs.2012.1080 doi (DE-627)DOAJ035538562 (DE-599)DOAJ4e5494cbcd964cfb8570a058f9157219 DE-627 ger DE-627 rakwb eng SF1-1100 SF600-1100 Tatsuhiro Maeda verfasserin aut Effect of the primary cooling rate on the motility and fertility of frozen-thawed rabbit spermatozoa 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<In the present study, we examined the effect of primary cooling rates on the motility and fertility of frozen-thawed rabbit spermatozoa. Rabbit semen diluted with an egg-yolk acetamide extender was cooled from room temperature to 5°C at four different rates (-0.1, -0.2, -0.4, -0.8°C/min) as a primary cooling step, then semen was frozen in liquid nitrogen vapour. After thawing, sperm cooled at -0.1°C/min showed the highest motility (40.7 ± 7.3%); there were no significant differences between the motilities of the -0.1, -0.2, and -0.4°C/min groups. The motility of frozen-thawed sperm cooled at -0.8°C/min (29.2 ± 6.8%) was significantly lower than that of sperm cooled at -0.1 and -0.2°C/min. The viability (-0.1°C/min, 38.1 ± 4.0%; -0.8°C/min, 24.3 ± 7.3%) of frozen-thawed sperm was closely related to its motility (-0.1°C/min, 36.7 ± 7.2%; -0.8°C/min, 22.3 ± 4.7%). Quality of post-thaw motile sperm cooled at different rates was estimated by comparing the fertilisation ability of the -0.1 and -0.8°C/min groups following artificial insemination. There were no significant differences in pregnancy rates and mean litter sizes. These data suggest that cooling rabbit semen at rates ranging from -0.1 to -0.8°C/min affects the viability but not the fertilisation capacity of motile spermatozoa after thawing.</p< cryopreservation cooling rate motility spermatozoa Animal culture Veterinary medicine Enqi Liu verfasserin aut Kazutoshi Nishijima verfasserin aut Shinji Yamaguchi verfasserin aut Masatoshi Morimoto verfasserin aut Teruo Watanabe verfasserin aut Jianglin Fan verfasserin aut Shuji Kitajima verfasserin aut In World Rabbit Science Universitat Politècnica de València, 2020 20(2012), 2, Seite 65-70 (DE-627)737292687 (DE-600)2705011-7 19898886 nnns volume:20 year:2012 number:2 pages:65-70 https://doi.org/10.4995/wrs.2012.1080 kostenfrei https://doaj.org/article/4e5494cbcd964cfb8570a058f9157219 kostenfrei http://polipapers.upv.es/index.php/wrs/article/view/1080 kostenfrei https://doaj.org/toc/1257-5011 Journal toc kostenfrei https://doaj.org/toc/1989-8886 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 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_4367 GBV_ILN_4700 AR 20 2012 2 65-70 |
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10.4995/wrs.2012.1080 doi (DE-627)DOAJ035538562 (DE-599)DOAJ4e5494cbcd964cfb8570a058f9157219 DE-627 ger DE-627 rakwb eng SF1-1100 SF600-1100 Tatsuhiro Maeda verfasserin aut Effect of the primary cooling rate on the motility and fertility of frozen-thawed rabbit spermatozoa 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<In the present study, we examined the effect of primary cooling rates on the motility and fertility of frozen-thawed rabbit spermatozoa. Rabbit semen diluted with an egg-yolk acetamide extender was cooled from room temperature to 5°C at four different rates (-0.1, -0.2, -0.4, -0.8°C/min) as a primary cooling step, then semen was frozen in liquid nitrogen vapour. After thawing, sperm cooled at -0.1°C/min showed the highest motility (40.7 ± 7.3%); there were no significant differences between the motilities of the -0.1, -0.2, and -0.4°C/min groups. The motility of frozen-thawed sperm cooled at -0.8°C/min (29.2 ± 6.8%) was significantly lower than that of sperm cooled at -0.1 and -0.2°C/min. The viability (-0.1°C/min, 38.1 ± 4.0%; -0.8°C/min, 24.3 ± 7.3%) of frozen-thawed sperm was closely related to its motility (-0.1°C/min, 36.7 ± 7.2%; -0.8°C/min, 22.3 ± 4.7%). Quality of post-thaw motile sperm cooled at different rates was estimated by comparing the fertilisation ability of the -0.1 and -0.8°C/min groups following artificial insemination. There were no significant differences in pregnancy rates and mean litter sizes. These data suggest that cooling rabbit semen at rates ranging from -0.1 to -0.8°C/min affects the viability but not the fertilisation capacity of motile spermatozoa after thawing.</p< cryopreservation cooling rate motility spermatozoa Animal culture Veterinary medicine Enqi Liu verfasserin aut Kazutoshi Nishijima verfasserin aut Shinji Yamaguchi verfasserin aut Masatoshi Morimoto verfasserin aut Teruo Watanabe verfasserin aut Jianglin Fan verfasserin aut Shuji Kitajima verfasserin aut In World Rabbit Science Universitat Politècnica de València, 2020 20(2012), 2, Seite 65-70 (DE-627)737292687 (DE-600)2705011-7 19898886 nnns volume:20 year:2012 number:2 pages:65-70 https://doi.org/10.4995/wrs.2012.1080 kostenfrei https://doaj.org/article/4e5494cbcd964cfb8570a058f9157219 kostenfrei http://polipapers.upv.es/index.php/wrs/article/view/1080 kostenfrei https://doaj.org/toc/1257-5011 Journal toc kostenfrei https://doaj.org/toc/1989-8886 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 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_4367 GBV_ILN_4700 AR 20 2012 2 65-70 |
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10.4995/wrs.2012.1080 doi (DE-627)DOAJ035538562 (DE-599)DOAJ4e5494cbcd964cfb8570a058f9157219 DE-627 ger DE-627 rakwb eng SF1-1100 SF600-1100 Tatsuhiro Maeda verfasserin aut Effect of the primary cooling rate on the motility and fertility of frozen-thawed rabbit spermatozoa 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<In the present study, we examined the effect of primary cooling rates on the motility and fertility of frozen-thawed rabbit spermatozoa. Rabbit semen diluted with an egg-yolk acetamide extender was cooled from room temperature to 5°C at four different rates (-0.1, -0.2, -0.4, -0.8°C/min) as a primary cooling step, then semen was frozen in liquid nitrogen vapour. After thawing, sperm cooled at -0.1°C/min showed the highest motility (40.7 ± 7.3%); there were no significant differences between the motilities of the -0.1, -0.2, and -0.4°C/min groups. The motility of frozen-thawed sperm cooled at -0.8°C/min (29.2 ± 6.8%) was significantly lower than that of sperm cooled at -0.1 and -0.2°C/min. The viability (-0.1°C/min, 38.1 ± 4.0%; -0.8°C/min, 24.3 ± 7.3%) of frozen-thawed sperm was closely related to its motility (-0.1°C/min, 36.7 ± 7.2%; -0.8°C/min, 22.3 ± 4.7%). Quality of post-thaw motile sperm cooled at different rates was estimated by comparing the fertilisation ability of the -0.1 and -0.8°C/min groups following artificial insemination. There were no significant differences in pregnancy rates and mean litter sizes. These data suggest that cooling rabbit semen at rates ranging from -0.1 to -0.8°C/min affects the viability but not the fertilisation capacity of motile spermatozoa after thawing.</p< cryopreservation cooling rate motility spermatozoa Animal culture Veterinary medicine Enqi Liu verfasserin aut Kazutoshi Nishijima verfasserin aut Shinji Yamaguchi verfasserin aut Masatoshi Morimoto verfasserin aut Teruo Watanabe verfasserin aut Jianglin Fan verfasserin aut Shuji Kitajima verfasserin aut In World Rabbit Science Universitat Politècnica de València, 2020 20(2012), 2, Seite 65-70 (DE-627)737292687 (DE-600)2705011-7 19898886 nnns volume:20 year:2012 number:2 pages:65-70 https://doi.org/10.4995/wrs.2012.1080 kostenfrei https://doaj.org/article/4e5494cbcd964cfb8570a058f9157219 kostenfrei http://polipapers.upv.es/index.php/wrs/article/view/1080 kostenfrei https://doaj.org/toc/1257-5011 Journal toc kostenfrei https://doaj.org/toc/1989-8886 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 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_4367 GBV_ILN_4700 AR 20 2012 2 65-70 |
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10.4995/wrs.2012.1080 doi (DE-627)DOAJ035538562 (DE-599)DOAJ4e5494cbcd964cfb8570a058f9157219 DE-627 ger DE-627 rakwb eng SF1-1100 SF600-1100 Tatsuhiro Maeda verfasserin aut Effect of the primary cooling rate on the motility and fertility of frozen-thawed rabbit spermatozoa 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<In the present study, we examined the effect of primary cooling rates on the motility and fertility of frozen-thawed rabbit spermatozoa. Rabbit semen diluted with an egg-yolk acetamide extender was cooled from room temperature to 5°C at four different rates (-0.1, -0.2, -0.4, -0.8°C/min) as a primary cooling step, then semen was frozen in liquid nitrogen vapour. After thawing, sperm cooled at -0.1°C/min showed the highest motility (40.7 ± 7.3%); there were no significant differences between the motilities of the -0.1, -0.2, and -0.4°C/min groups. The motility of frozen-thawed sperm cooled at -0.8°C/min (29.2 ± 6.8%) was significantly lower than that of sperm cooled at -0.1 and -0.2°C/min. The viability (-0.1°C/min, 38.1 ± 4.0%; -0.8°C/min, 24.3 ± 7.3%) of frozen-thawed sperm was closely related to its motility (-0.1°C/min, 36.7 ± 7.2%; -0.8°C/min, 22.3 ± 4.7%). Quality of post-thaw motile sperm cooled at different rates was estimated by comparing the fertilisation ability of the -0.1 and -0.8°C/min groups following artificial insemination. There were no significant differences in pregnancy rates and mean litter sizes. These data suggest that cooling rabbit semen at rates ranging from -0.1 to -0.8°C/min affects the viability but not the fertilisation capacity of motile spermatozoa after thawing.</p< cryopreservation cooling rate motility spermatozoa Animal culture Veterinary medicine Enqi Liu verfasserin aut Kazutoshi Nishijima verfasserin aut Shinji Yamaguchi verfasserin aut Masatoshi Morimoto verfasserin aut Teruo Watanabe verfasserin aut Jianglin Fan verfasserin aut Shuji Kitajima verfasserin aut In World Rabbit Science Universitat Politècnica de València, 2020 20(2012), 2, Seite 65-70 (DE-627)737292687 (DE-600)2705011-7 19898886 nnns volume:20 year:2012 number:2 pages:65-70 https://doi.org/10.4995/wrs.2012.1080 kostenfrei https://doaj.org/article/4e5494cbcd964cfb8570a058f9157219 kostenfrei http://polipapers.upv.es/index.php/wrs/article/view/1080 kostenfrei https://doaj.org/toc/1257-5011 Journal toc kostenfrei https://doaj.org/toc/1989-8886 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 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_4367 GBV_ILN_4700 AR 20 2012 2 65-70 |
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In World Rabbit Science 20(2012), 2, Seite 65-70 volume:20 year:2012 number:2 pages:65-70 |
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In World Rabbit Science 20(2012), 2, Seite 65-70 volume:20 year:2012 number:2 pages:65-70 |
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Effect of the primary cooling rate on the motility and fertility of frozen-thawed rabbit spermatozoa |
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<p<In the present study, we examined the effect of primary cooling rates on the motility and fertility of frozen-thawed rabbit spermatozoa. Rabbit semen diluted with an egg-yolk acetamide extender was cooled from room temperature to 5°C at four different rates (-0.1, -0.2, -0.4, -0.8°C/min) as a primary cooling step, then semen was frozen in liquid nitrogen vapour. After thawing, sperm cooled at -0.1°C/min showed the highest motility (40.7 ± 7.3%); there were no significant differences between the motilities of the -0.1, -0.2, and -0.4°C/min groups. The motility of frozen-thawed sperm cooled at -0.8°C/min (29.2 ± 6.8%) was significantly lower than that of sperm cooled at -0.1 and -0.2°C/min. The viability (-0.1°C/min, 38.1 ± 4.0%; -0.8°C/min, 24.3 ± 7.3%) of frozen-thawed sperm was closely related to its motility (-0.1°C/min, 36.7 ± 7.2%; -0.8°C/min, 22.3 ± 4.7%). Quality of post-thaw motile sperm cooled at different rates was estimated by comparing the fertilisation ability of the -0.1 and -0.8°C/min groups following artificial insemination. There were no significant differences in pregnancy rates and mean litter sizes. These data suggest that cooling rabbit semen at rates ranging from -0.1 to -0.8°C/min affects the viability but not the fertilisation capacity of motile spermatozoa after thawing.</p< |
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<p<In the present study, we examined the effect of primary cooling rates on the motility and fertility of frozen-thawed rabbit spermatozoa. Rabbit semen diluted with an egg-yolk acetamide extender was cooled from room temperature to 5°C at four different rates (-0.1, -0.2, -0.4, -0.8°C/min) as a primary cooling step, then semen was frozen in liquid nitrogen vapour. After thawing, sperm cooled at -0.1°C/min showed the highest motility (40.7 ± 7.3%); there were no significant differences between the motilities of the -0.1, -0.2, and -0.4°C/min groups. The motility of frozen-thawed sperm cooled at -0.8°C/min (29.2 ± 6.8%) was significantly lower than that of sperm cooled at -0.1 and -0.2°C/min. The viability (-0.1°C/min, 38.1 ± 4.0%; -0.8°C/min, 24.3 ± 7.3%) of frozen-thawed sperm was closely related to its motility (-0.1°C/min, 36.7 ± 7.2%; -0.8°C/min, 22.3 ± 4.7%). Quality of post-thaw motile sperm cooled at different rates was estimated by comparing the fertilisation ability of the -0.1 and -0.8°C/min groups following artificial insemination. There were no significant differences in pregnancy rates and mean litter sizes. These data suggest that cooling rabbit semen at rates ranging from -0.1 to -0.8°C/min affects the viability but not the fertilisation capacity of motile spermatozoa after thawing.</p< |
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<p<In the present study, we examined the effect of primary cooling rates on the motility and fertility of frozen-thawed rabbit spermatozoa. Rabbit semen diluted with an egg-yolk acetamide extender was cooled from room temperature to 5°C at four different rates (-0.1, -0.2, -0.4, -0.8°C/min) as a primary cooling step, then semen was frozen in liquid nitrogen vapour. After thawing, sperm cooled at -0.1°C/min showed the highest motility (40.7 ± 7.3%); there were no significant differences between the motilities of the -0.1, -0.2, and -0.4°C/min groups. The motility of frozen-thawed sperm cooled at -0.8°C/min (29.2 ± 6.8%) was significantly lower than that of sperm cooled at -0.1 and -0.2°C/min. The viability (-0.1°C/min, 38.1 ± 4.0%; -0.8°C/min, 24.3 ± 7.3%) of frozen-thawed sperm was closely related to its motility (-0.1°C/min, 36.7 ± 7.2%; -0.8°C/min, 22.3 ± 4.7%). Quality of post-thaw motile sperm cooled at different rates was estimated by comparing the fertilisation ability of the -0.1 and -0.8°C/min groups following artificial insemination. There were no significant differences in pregnancy rates and mean litter sizes. These data suggest that cooling rabbit semen at rates ranging from -0.1 to -0.8°C/min affects the viability but not the fertilisation capacity of motile spermatozoa after thawing.</p< |
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Effect of the primary cooling rate on the motility and fertility of frozen-thawed rabbit spermatozoa |
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Rabbit semen diluted with an egg-yolk acetamide extender was cooled from room temperature to 5°C at four different rates (-0.1, -0.2, -0.4, -0.8°C/min) as a primary cooling step, then semen was frozen in liquid nitrogen vapour. After thawing, sperm cooled at -0.1°C/min showed the highest motility (40.7 ± 7.3%); there were no significant differences between the motilities of the -0.1, -0.2, and -0.4°C/min groups. The motility of frozen-thawed sperm cooled at -0.8°C/min (29.2 ± 6.8%) was significantly lower than that of sperm cooled at -0.1 and -0.2°C/min. The viability (-0.1°C/min, 38.1 ± 4.0%; -0.8°C/min, 24.3 ± 7.3%) of frozen-thawed sperm was closely related to its motility (-0.1°C/min, 36.7 ± 7.2%; -0.8°C/min, 22.3 ± 4.7%). Quality of post-thaw motile sperm cooled at different rates was estimated by comparing the fertilisation ability of the -0.1 and -0.8°C/min groups following artificial insemination. There were no significant differences in pregnancy rates and mean litter sizes. These data suggest that cooling rabbit semen at rates ranging from -0.1 to -0.8°C/min affects the viability but not the fertilisation capacity of motile spermatozoa after thawing.</p<</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">cryopreservation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">cooling rate</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">motility</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">spermatozoa</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Animal culture</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Veterinary medicine</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Enqi Liu</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield 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