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Studies on long-term preservation of cock semen of medium-heavy breeds in liquid nitrogen using the straw method



Studies on long-term preservation of cock semen of medium-heavy breeds in liquid nitrogen using the straw method



Monatshefte fur Veterinarmedizin 30(24): 941-944



60 cocks and approx. 1200 hens belonging to the White Rock and New Hampshire breeds were used. 119 mixed semen samples were prepared from over 1500 ejaculates. The freezing method of Watanabe et al. was used. The forward motility of spermatozoa frozen by this method, and stored for 11-271 days, ranged from 13.21 to 40.17% when glycerol was used as a cryoprotectant, and from 18.75 to 36.31% when ethylene glycol was used instead.

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Accession: 000510854

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