The dynamics of occurence of spermatozoa with pathologic changes in relation to quality parameters of ejaculate and to selected biochemical parameters of blood in cockerel of domestic fowl | Dynamika výskytu patologicky změněných spermií ve vztahu k ukazatelům kvality ejakulátu a vybraným biochemickým ukazatelům krve u kohoutů kura domácího
2010
Švábová, L., Mendelova univ., Brno (Czech Republic). Agronomická fakulta, Ústav chovu a šlechtění zvířat | Máchal, L. | Severa, L. | Vágenknechtová, M. | Strapák, P., Slovenská poľnohospodárska univerzita v Nitre (Slovak Republic)
The influence of age of cocks of three initial laying lines on qualitative and quantitative parameters of ejaculate was observed and their relation to selected biochemical parameters of blood in cockerel of domestic fowl was defined. The samples of ejaculate and blood were collected in the age of 173, 239, 315 and 391 days. The basic spermatologic parameters and morphologic examination of spermatozoa were evaluated. The lowest average volume of ejaculate (0.45 square cm) was found at the end of the period; the highest average volume of ejaculate (0.64 square cm) was in the age of 173 days; the volume decreased with increasing age of cocks. Average sperm motility ranged from 53.3% (age of 239 days) to 78.4% (age of 391 days). The highest average concentration of sperms in ejaculate (2.52.106 per square mm) was detected in the age of 173 days. Morphological examination revealed that the highest amount of morphologic changes on spermatozoa was presented on tails (23.6 to 29.8%) and on connecting piece (11.7 to 31.9%). Biochemical blood plasma parameters were defined and the average concentration of glucose was from 11.78 to 14.23 mmol per l, cholesterol from 2.45 to 3.11 mmol per l, creatinin from 49.22 to 56.71 mmol per l, urea from 1.20 to 1.85 mmol per l and mineral substances: the average concentration of calcium (1.86-2.15 mmol per l), phosphorus (2.74-5.61 mmol per l and magnesium (0.98-1.34 mmol per l). Phenotypic correlations between the sperm motility and other spermatologic parameters of ejaculate were negative (rp=-0.28 and rp=-0.31), the correlation between motility and morphologic creation of sperms were calculated as negative (rp=-0.28; P lt 0.01; to 0.12); the occurrence of morphological abnormalities in spermatozoa was decreasing with increasing sperm motility. Mainly positive phenotypic correlations were calculated between concentration of glucose and morphologic creation of sperms (rp=0.12 to 0.27; P lt 0.01).
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