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Effects of the freezing rate on viability and fertility of frozen-thawed fowl spermatozoa

Identifieur interne : 000807 ( Istex/Corpus ); précédent : 000806; suivant : 000808

Effects of the freezing rate on viability and fertility of frozen-thawed fowl spermatozoa

Auteurs : F. Seigneurin ; E. Blesbois

Source :

RBID : ISTEX:F57B15BCBA625F48E0BDC2EE763B020C42DC6B70

Abstract

An improved method for the freezing and thawing of fowl semen was developed using glycerol as a cryoprotectant. The effect of the freezing rate was observed on the motility, viability plus morphology of spermatozoa and the fertility rate, as assessed on Days 2, 3 and 4 post insemination. Overall 5 to 6 twice-weekly successive inseminations were performed. In experiment 1, freezing rates of −1, −5, −10 and −15 °C/min from +5 to −35 °C, were tested for the above 4 parameters. The best results were obtained with freezing rates of −5 and −10 °C/min. In Experiment 2, the freezing rates of −5, −7 and −10 °C were tested for the fertilizing ability of the spermatozoa. The best freezing rate was −7 °C/min. The fertilizing ability of pooled frozen-thawed spermatozoa was very promising (76% fertilized oocytes). We conclude that even without the selection of parent stock animals (for fertilizing or laying ability) and without any selection of semen before freezing or after thawing, it is possible to obtain a high level of fertility and viability with this improved glycerol method following twice-weekly insemination with 300 million sperm cells.

Url:
DOI: 10.1016/0093-691X(95)00119-S

Links to Exploration step

ISTEX:F57B15BCBA625F48E0BDC2EE763B020C42DC6B70

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<ce:title>Effects of the freezing rate on viability and fertility of frozen-thawed fowl spermatozoa</ce:title>
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<ce:author>
<ce:given-name>F.</ce:given-name>
<ce:surname>Seigneurin</ce:surname>
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<ce:sup>1</ce:sup>
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<ce:author>
<ce:given-name>E.</ce:given-name>
<ce:surname>Blesbois</ce:surname>
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<ce:sup>2</ce:sup>
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<ce:textfn>SYSAAF, Station de Recherches Avicoles, 37380 Nouzilly, France</ce:textfn>
</ce:affiliation>
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<ce:label>2</ce:label>
<ce:textfn>INRA, Station de Recherches Avicoles, 37380 Nouzilly, France</ce:textfn>
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<ce:date-received day="1" month="7" year="1994"></ce:date-received>
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<ce:section-title>Abstract</ce:section-title>
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<ce:simple-para>An improved method for the freezing and thawing of fowl semen was developed using glycerol as a cryoprotectant. The effect of the freezing rate was observed on the motility, viability plus morphology of spermatozoa and the fertility rate, as assessed on Days 2, 3 and 4 post insemination. Overall 5 to 6 twice-weekly successive inseminations were performed. In experiment 1, freezing rates of −1, −5, −10 and −15 °C/min from +5 to −35 °C, were tested for the above 4 parameters. The best results were obtained with freezing rates of −5 and −10 °C/min. In Experiment 2, the freezing rates of −5, −7 and −10 °C were tested for the fertilizing ability of the spermatozoa. The best freezing rate was −7 °C/min. The fertilizing ability of pooled frozen-thawed spermatozoa was very promising (76% fertilized oocytes).</ce:simple-para>
<ce:simple-para>We conclude that even without the selection of parent stock animals (for fertilizing or laying ability) and without any selection of semen before freezing or after thawing, it is possible to obtain a high level of fertility and viability with this improved glycerol method following twice-weekly insemination with 300 million sperm cells.</ce:simple-para>
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<ce:section-title>Keywords</ce:section-title>
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<ce:text>fowl semen</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>freezing rate</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>motility</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>viability</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>fertility</ce:text>
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<abstract lang="en">An improved method for the freezing and thawing of fowl semen was developed using glycerol as a cryoprotectant. The effect of the freezing rate was observed on the motility, viability plus morphology of spermatozoa and the fertility rate, as assessed on Days 2, 3 and 4 post insemination. Overall 5 to 6 twice-weekly successive inseminations were performed. In experiment 1, freezing rates of −1, −5, −10 and −15 °C/min from +5 to −35 °C, were tested for the above 4 parameters. The best results were obtained with freezing rates of −5 and −10 °C/min. In Experiment 2, the freezing rates of −5, −7 and −10 °C were tested for the fertilizing ability of the spermatozoa. The best freezing rate was −7 °C/min. The fertilizing ability of pooled frozen-thawed spermatozoa was very promising (76% fertilized oocytes). We conclude that even without the selection of parent stock animals (for fertilizing or laying ability) and without any selection of semen before freezing or after thawing, it is possible to obtain a high level of fertility and viability with this improved glycerol method following twice-weekly insemination with 300 million sperm cells.</abstract>
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<genre>Keywords</genre>
<topic>fowl semen</topic>
<topic>freezing rate</topic>
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<topic>viability</topic>
<topic>fertility</topic>
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