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Zmienność międzyrasowa cech fizycznych ejakulatów knurów użytkowanych w Stacji Unasieniania Loch

100%

Muczynska E., Kondracki S., Wysokinska A.

Roczniki Naukowe Zootechniki

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2010

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tom 37

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nr 2

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Season's influence on the properties of male domestic pig semen

88%

Kondracki S., Wysokinska A., Kowalewski D., Muczynska E., Adamiak A.

Rozprawy Naukowe. Państwowa Wyższa Szkoła Naukowa im. Papieża Jana Pawła II w Białej Podlaskiej

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2009

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tom 03

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 cells exhibiting proper motility, total number of sperm cells in the ejaculate and number of insemination doses obtained from one ejaculate. The collected data have been analyzed according to the season criterion with indication of the ejaculate collected in the individual months. It has been revealed that the most suitable ejaculate was collected from the domestic pig boars in November and December whereas in March, April and May the parameters lowered. The ejaculate collected in the springtime is characterized by a lower volume and a lower number of the motile sperm cells than in the other seasons. From the ejaculate collected in the autumn and winter period more insemination doses can be prepared than from those collected in spring and summer. No difference has been found between the boars of the wbp and pbz breeds with regard to their susceptibility to the seasonal factors’ influence.

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Effect of seasonal factors on the ejaculate properties of crossbred Duroc x Pietrain and Pietrain x Duroc boars as well as purebred Duroc and Pietrain boars

88%

Wysokinska A., Kondracki S., Kowalewski D., Adamiak A., Muczynska E.

Bulletin of the Veterinary Institute in Puławy

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2009

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tom 53

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nr 4

The experimental material consisted of 12,285 ejaculates obtained from 93 boars, including 18 Duroc boars, 30 Pietrain boars, 24 ♀Duroc x ♂Pietrain crossbreds and 21 ♀Pietrain x ♂Duroc crossbreds. The boars were utilised for at least 6 months and qualified for insemination from January 1, 1992 to December 31, 2007. Each ejaculate was assessed using standard methods for the following physical traits: volume, sperm concentration, spermatozoon motility, total number of spermatozoa, and number of insemination doses per ejaculate. The data obtained were classified into 12 sub-groups consisting of ejaculates collected in successive months. Ejaculates collected in the summer months had less spermatozoa than in the autumn and winter period. Ejaculates collected in the summer (mainly in July) yielded the least amount of insemination doses. Ejaculates of both types of crossbreds were characterised by greater spermatozoon motility compared with purebred boars, irrespective of the month of ejaculate collection.

Ograniczanie wyników

1 Bulletin of the Veterinary Institute in Puławy

1 Roczniki Naukowe Zootechniki

1 Rozprawy Naukowe. Państwowa Wyższa Szkoła Naukowa im. Papieża Jana Pawła II w Białej Podlaskiej

3 Kondracki S.

3 Muczynska E.

3 Wysokinska A.

2 Adamiak A.

2 Kowalewski D.

1 2010

2 2009

Zmienność międzyrasowa cech fizycznych ejakulatów knurów użytkowanych w Stacji Unasieniania Loch

Season's influence on the properties of male domestic pig semen

Effect of seasonal factors on the ejaculate properties of crossbred Duroc x Pietrain and Pietrain x Duroc boars as well as purebred Duroc and Pietrain boars