Seasonal variation in sperm characteristics of boars in southern Uruguay

Revista Brasileira de Zootecnia

Petrocelli, Hugo²  Gosálvez, Jaime¹  Batista, Carlos² 

[1] Universidad Autónoma de Madrid, Madrid, España;Universidad de la República, Montevideo, Uruguay

关键词: boar;    natural photoperiod;    season;    semen qualityIntroductionThe reproductive output of pigs depends on many factors affecting both females and males;   

DOI  :  10.1590/S1806-92902015000100001

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this study was to evaluate the effects of season, natural photoperiod, and room temperature at the housing facility on boar semen characteristics in Uruguay (34º66'S; 56º29'W). For this purpose, 117 ejaculates, obtained from eight adult males collected through 12 consecutive months, were assessed for sperm viability, DNA integrity, abnormalities (total, primary, and secondary), ejaculate volume, and sperm concentration. Viability, total and primary abnormalities, volume, and sperm concentration were affected by season. Sperm viability, volume, and sperm concentration were affected by natural photoperiod. In general, autumn and the decreasing photoperiod had a negative impact on most of the semen characteristics, except for volume. Housing temperature did not affect semen characteristics. In boars living in temperate climates, semen quality is negatively affected during autumn and is related to photoperiod changes; however, the effects of temperature changes in housingdo not affect these seminal characteristics. In this scenario, seasonal differences in semen quality may have a negative effect on sow fertilization. Consequently, semen quality control especially during autumn is imperative for the best boar selection to be used for insemination purposes. Seasonal differences in semen quality may have a negative effect on sow reproductive performance. This issue will be addressed in a future investigation.

【 授权许可】

Unknown