Fertility rate of daily collected and cryopreserved fowl semen.
Semen was collected for 4 consecutive d individually from experimental broiler breeder males that had not been massaged for 7 d. The semen was mixed and diluted with the Beltsville Poultry Semen Extender with dimethylsulfoxide (DMSO) as cryoprotectant and cryopreserved. After thawing of the semen, hens were inseminated and fertility over 1 wk after a single insemination with the cryopreserved semen was determined. The overall fertility rate in this experiment (83 to 93%) was high, compared with the generally reported fertility rate of frozen-thawed fowl semen. The fertility rate of the semen collected on Days 3 and 4 was significantly higher than that of semen collected on Day 1 or 2, indicating that frequent collection over the 4-d period enhances the fertility rate of the semen.
Van Voorst
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Institute for Animal Science and Health (ID-DLO) Het Spelderholt, Beekbergen, The Netherlands.
Leenstra
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D000818:Animals; D016922:Cellular Senescence / Q000502:physiology; D002642:Chick Embryo; D002645:Chickens / Q000502:physiology*; D015925:Cryopreservation / Q000662:veterinary*; D005298:Fertility / Q000502:physiology*; D008297:Male; D012661:Semen / Q000502:physiology; D012662:Semen Preservation / Q000662:veterinary*; D013094:Spermatozoa / Q000502:physiology; D013997:Time Factors