An Assessment of the Breeding Maturity of Insemination Boars Based on Ejaculate Quality Changes

Banaszewska, Dorota; Kondracki, Stanisław

doi:10.3409/fb60_34.151162

Cited by 32 publications

(27 citation statements)

References 30 publications

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“…The effect of daylight within photoperiod interval is in agreement with the research of Knecht et al (2013), in which a significant effect of photoperiod was determined on the variability of ejaculate volume. There is a trend of increase in the volume of ejaculate with the increase in boar age, which is consistent with the investigations of Wolf and Smital (2009), Banaszewska and Kondracki (2012), and Savić et al (2013). The increase in ejaculate volume with aging also agrees with the results of Kondracki et al (2013), who showed that in boar, the volume increased at the beginning of utilisation, after three months and after six months of exploitation (221.72, 251.14, and 269.20 mL).…”

Section: Discussionsupporting

confidence: 91%

Effect of photoperiod on sexual activity of boar

Savić

Petrović

2015

R. Bras. Zootec.

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-The main objective of this study was to assess the effect of photoperiod on sexual activity of three breeds of boars: Swedish Landrace (n=34), Large White (n=38), and Duroc (n=32). Boar sexual activity was analysed based on the libido index and intensity of ejaculation. The libido index was calculated as the ratio between the duration of ejaculation and time of preparation until ejaculation. The intensity of ejaculation was the volume of ejaculate (mL) secreted in the unit of time (min). The effect of photoperiod was analysed as the effect of duration of daylight (<12 h and >12 h) within photoperiod intervals (increasing and decreasing). Impact assessment was carried out by applying the General Linear Model procedure. Libido and intensity of ejaculation varied under the impact of photoperiod and the breed of boars. With the increase in age, the boar libido weakened, while the volume of ejaculate and intensity of ejaculation increased. Boars manifested better libido when the daylight lasted longer than 12 h in both photoperiod intervals. Different from libido, the volume of ejaculate and intensity of ejaculation were highest when the daylight was shorter than 12 h, but only in the decreasing photoperiod interval. Swedish Landrace boars manifested best libido, while in the production of sperm the Duroc boars were inferior compared with Swedish Landrace and Large White. The phenotypic relationship among libido, ejaculate volume, and ejaculation intensity ranges from very low to high; however, the coefficients were positive, which indicates the possibility of simultaneous improvement of these traits.

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Section: Discussionsupporting

confidence: 91%

Effect of photoperiod on sexual activity of boar

Savić

Petrović

2015

R. Bras. Zootec.

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“…An additional difficulty in diagnosing fertility is the fact that microscopic analysis of sperm shows that sperm morphology is highly heterogeneous, as sperm cells with many different shapes, sizes, and forms are observed in one ejaculate (5,16). This has led scientists to identify and describe the morphological characteristics of well-shaped sperm cells.…”

Section: Discussionmentioning

confidence: 99%

“…In the case of diagnosis of human semen, preparation of samples by the Papanicolaou staining method is often preferred (36). To evaluate animal semen, a simple staining method using a complex of eosin with gentian stain is common (5,26), while SpermBlue ® stain is used for the analysis of both human and animal semen (48). Accurate assessment of sperm morphology depends on meticulous preparation, fixation, and staining of sperm cells, as this affects the morphometry of the sperm head and of the entire cell (34).…”

Section: Introductionmentioning

confidence: 99%

Morphometric dimensions of the stallion sperm head depending on the staining method used

Banaszewska¹,

Czubaszek

Walczak-Jędrzejowska

et al. 2015

Bulletin of the Veterinary Institute in Pulawy

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Semen was collected from Polish Halfbred stallions. Twenty individuals from 3 to 4 years of age were selected for the study. At least one ejaculate from each stallion was collected and assessed. Sperm morphology was evaluated using Papanicolaou stain, SpermBlue ® , and a complex of eosin and gentian stain, whereas unstained slides were used as control samples. Morphometric measurements were performed on 100 randomly selected sperm heads in each ejaculate. The length, width, perimeter, and surface area of the sperm head were measured. The frequency of nuclear vacuoles was determined as well. Tygerberg's strict criteria, which most precisely characterise the sperm head, were used in the morphological evaluation of the sperm. The results obtained indicate that in the case of staining with SpermBlue ® and with eosin+gentian complex, the morphometry of the sperm head seems to be most similar to that observed in unstained smears. It also seems that neither shrinking nor swelling is uniform in the various staining techniques (Papanicolaou stain). Moreover, it appears that in comparison with unstained sperm, all methods caused the width of the head to increase as a result of swelling.

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“…Among the environmental factors, the most important are the rearing conditions coupled with an appropriate nutrition strategy. Currently, boars of sire breeds (lines) selected for commercial use as AI sires are subjected to reproductive, fattening and slaughter evaluation.Recently, there have been reports of problems related to the deterioration of boar reproductive traits, such as reduced sexual activity and poor semen quality (2,18,19,35). There could be many reasons for that, e.g.…”

mentioning

confidence: 99%

“…Recently, there have been reports of problems related to the deterioration of boar reproductive traits, such as reduced sexual activity and poor semen quality (2,18,19,35). There could be many reasons for that, e.g.…”

mentioning

confidence: 99%

Variability of semen in boars treated with vitamin C in food ration

Lechowski¹,

Kasprzyk²,

Trawińska³

2018

Medycyna Weterynaryjna

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The main criterion for keeping a boar at an insemination station is the production of boar ejaculates containing a high quantity of spermatozoa with a high fertilization potential. The production of boar semen is affected by the biological value of the boar (22,44) and by environmental factors (4, 46). As far as the biological value is concerned, the breed of the boar is considered to be of paramount importance (17,36,39,45) as it has critical influence on most semen traits. The age of the animal also plays a role (20,32,38,44). Among the environmental factors, the most important are the rearing conditions coupled with an appropriate nutrition strategy. Currently, boars of sire breeds (lines) selected for commercial use as AI sires are subjected to reproductive, fattening and slaughter evaluation.Recently, there have been reports of problems related to the deterioration of boar reproductive traits, such as reduced sexual activity and poor semen quality (2,18,19,35). There could be many reasons for that, e.g. excessive physiological burden associated with the fast growth rate resulting from intensive selection based on fattening and slaughter traits. The process of spermatogenesis can be affected deleteriously by other environmental factors, such as pesticides, exogenous female hormones and heavy metals, while positive effects may come from feed supplementation with, among others, carnitine, arginine, selenium and vitamin E. Administration of vitamins B12, B6 and PP contributes to increased sperm cell counts and improves their motility (23). Importantly, the effectiveness of

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An Assessment of the Breeding Maturity of Insemination Boars Based on Ejaculate Quality Changes

Cited by 32 publications

References 30 publications

Effect of photoperiod on sexual activity of boar

Effect of photoperiod on sexual activity of boar

Morphometric dimensions of the stallion sperm head depending on the staining method used

Variability of semen in boars treated with vitamin C in food ration

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