Semen quality of postpubertal boars during increasing and decreasing natural photoperiods

Sancho, S.; Pinart, E.; Briz, M.; García-Gil, N.; Badía, E.; Bassols, Judit; Kádár, Elisabet; Pruneda, A.; Bussalleu, E; Yeste, Marc; Coll, M.; Bonet, Sergi

doi:10.1016/j.theriogenology.2004.01.003

Cited by 78 publications

(79 citation statements)

References 25 publications

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“…Autumn was significantly worse than the other seasons, whereas winter was the best. This finding is in contrast with an earlier experiment, where no differences in viability were found between seasons (Sancho et al, 2004;Rivera et al, 2005).…”

Section: Discussioncontrasting

confidence: 99%

“…Kozdrowski and Dubiel (2004) suggested that the functioning of the reproductive organs of the boar is seasonal, controlled by photoperiod, as is the case with the wild pigs. However, this is not conclusive, since other observations have not revealed a clear effect of the photoperiod on domestic boars (Sancho et al, 2004).…”

Section: Discussionmentioning

confidence: 67%

“…Volume was the only characteristic that was higher during the decreasing period, in agreement with the studies of Trudeau and Sanford (1986) and Knecht et al (2013), who studied photoperiod. However, they contrast with Greenberg and Mahone (1981) and Sancho et al (2004), who, working with an artificially induced photoperiod, observed an increased volume with increasing day length. The greater ejaculate volume may be explained by the same reasons mentioned above for the autumn.…”

Section: Discussionmentioning

confidence: 70%

“…Despite these differences, sperm quality was similar and correlated with the photoperiod in a manner similar to that in our study. The decreasing photoperiods during autumn, but not the increasing photoperiods of spring, impaired testicular function (Sancho et al, 2004). Some authors observed that decreasing day length was the main environmental factor affecting the testicular function of boars from temperate climates (Schopper et al, 1984).…”

Section: Discussionmentioning

confidence: 99%

“…It is suggested that photoperiod may play an important role, especially in temperate climates, due to the significant differences in day length over the year (Kunavongkrit et al, 2005 Sperm volume and concentration are lowest in the spring; they gradually increase during the summer, and reach a peak in late autumn (Trudeau and Sanford, 1986;Borg et al, 1993;Kozdrowski and Dubiel, 2004). Changes in the photoperiod cause variations in semen production (Mazzarri et al, 1970) and volume, and spermatozoa abnormalities (Sancho et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal variation in sperm characteristics of boars in southern Uruguay

2015

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-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.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 67%

Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seasonal variation in sperm characteristics of boars in southern Uruguay

2015

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Development of a protocol for multiple staining with fluorochromes to assess the functional status of boar spermatozoa

Bussalleu

Pinart

Yeste

et al. 2005

Microsc. Res. Tech.

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The aim of this study was to design a simple and reliable method for the simultaneous evaluation of the nucleus, the acrosome, and the mitochondrial sheath of boar spermatozoa. Sperm samples coming from healthy and sexually mature Pietrain boars were incubated with two nuclear fluorochromes--bis-benzamide specific for viable cells, and propidium iodide specific for nonviable cells--the fluorochrome Mitotracker Green FM specific for functional mitochondria, and the lectin Trypsin inhibitor from Soybean (SBTI) conjugated with the fluorochrome Alexa Fluor 488 specific for proacrosin. The results obtained from assessing the functional status of the spermatozoa using fluorochromes were compared with the conventional sperm parameters of sperm vitality using the eosin exclusion test (EE test), and sperm motility and morphology using the computer-assisted semen analyzer SCA 2002Producció. Applying the multiple staining test, it was found that the frequency of viable spermatozoa with intact acrosome and intact mitochondria was not different from the frequency of viable spermatozoa obtained with the EE test, and also correlated positively with the frequency of motile spermatozoa and the frequency of mature spermatozoa. Therefore, this technique is useful to characterize the status of boar spermatozoa by assessing the nuclear, acrosomal, and mitochondrial integrity. Moreover, it provides reliable diagnostic information about the fertility potential of boars.

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Factors Affecting Boar Reproduction, Testis Function, and Sperm Quality

Pinart

Puigmulé

2013

Boar Reproduction

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Semen quality of postpubertal boars during increasing and decreasing natural photoperiods

Cited by 78 publications

References 25 publications

Seasonal variation in sperm characteristics of boars in southern Uruguay

Seasonal variation in sperm characteristics of boars in southern Uruguay

Development of a protocol for multiple staining with fluorochromes to assess the functional status of boar spermatozoa

Factors Affecting Boar Reproduction, Testis Function, and Sperm Quality

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