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We investigated more than 8 thousand ejaculates collected from 112 boars. The investigation involved all the ejaculates collected and qualified for insemination during a four- -year period at a sow insemination centre. Semen was manually collected from the boars twice weekly, in the morning, after the first feeding. The collected ejaculates were evaluated according to a methodology used at Polish...
The experimental material consisted of 75 ejaculates collected form 8 Duroc boars. The ejaculates were divided into three groups according to sperm concentration in an ejaculate. An ejaculate was obtained from each boar monthly and it was used to make microscopic preparations to examine spermatozoa morphology. In each preparation morphometric measurements were taken of fifteen randomly selected spermatozoa...
A study was carried out of 30, 160 ejaculate samples collected from 81 boars of the wbp (Polish Large White) breed and 182 boars of the pbz (Polish Landrace) breed. The ejaculate was collected manually with the sampling frequency of 4 - 5 days. An assessment of the ejaculate has been done with regard to the following physical properties: ejaculate volume, sperm cells concentration, percentage of sperm...
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