Effect of photoperiod on sexual activity of boar

Savić, Radomir; Petrović, M.

doi:10.1590/s1806-92902015000800002

Cited by 4 publications

(5 citation statements)

References 11 publications

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“…The lack of association between BT compound concentrations and DTS might be explained also by the fact that, in this study, measurement of DTS included also the ejaculation time, which is frequently used as an indicator of libido [ 40 ]. Reports on the duration of ejaculation in the boar vary from 3 to 20 min [ 41 ], so a long ejaculation time, which may be an indicator of good libido [ 42 , 43 ], can lead to increased overall DTS when compared with short ejaculation or no ejaculation.…”

Section: Resultsmentioning

confidence: 99%

Concentrations of Boar Taint Compounds Are Weakly Associated with Sexual Behavior of Young Boars

Boschi

Faggion

Mondin

et al. 2022

Animals

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Strategies to control boar taint (BT) in meat relies on the reduction of skatole, indole, and androstenone concentration. This might have unfavorable effects on the libido of breeding boars. The association between BT compound concentration in backfat and libido was investigated in 391 commercial breeding boars. Six sexual behavior traits (SBT; sexual arousal, salivation, mounting performance, interest in the dummy sow, penis unsheathing, and overall libido score) were scored during the training of the boars with the dummy sow. Variation in SBT was analyzed by proportional-odds cumulative logistic models. Overall, indole, skatole, and androstenone concentrations were weakly associated with libido. Farm of origin, age at training or body weight, and BT compound levels were poor predictors of boar performance (the area under the ROC curve ranged from 0.60 to 0.69). This indicates that BT compound concentrations were weakly associated with libido, even though the probability of observing good SBT scores increased with high levels of androstenone, intermediate or low levels of skatole, and intermediate to high levels of indole. Hence, practices aiming at reducing androstenone, and controlling the concentrations of skatole and indole to intermediate levels are not expected to impair the libido of young boars.

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Section: Resultsmentioning

confidence: 99%

Concentrations of Boar Taint Compounds Are Weakly Associated with Sexual Behavior of Young Boars

Boschi

Faggion

Mondin

et al. 2022

Animals

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“…According to Wysokińska and Kondracki [ 17 ], boars of the Duroc breed need less time to begin ejaculation than Pietrain boars and two-breed crosses. There are studies indicating that male libido may be affected by the season of the year [ 21 , 22 , 23 ], as well as by muscularity and growth rate [ 24 ]. However, the main source of variation seems to be the boar’s individual semen being collected when mounting a phantom and its ability to respond to the phantom.…”

Section: Discussionmentioning

confidence: 99%

“…Data presented by Szostak and Sarzyńska [ 7 ] indicate that the time needed to begin ejaculation has a wide range from 1.99 to 14.65 min, depending on the breed of boar. Savić and Petrović [ 23 ] reported a relatively shorter time needed for boars to begin ejaculation, ranging from 2 to 7 min (120–420 s) depending on the breed and day length. The results of the present study are similar to those reported by Kondracki et al [ 8 ], ranging from 245 to 289 s, depending on the length of the ejaculation period.…”

Section: Discussionmentioning

confidence: 99%

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The Usefulness of Sexual Behaviour Assessment at the Beginning of Service to Predict the Suitability of Boars for Artificial Insemination

Kondracki

Iwanina

Wysokińska

et al. 2021

Animals

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Parameters of sexual activity were determined in 49 young boars used for artificial insemination, four times at three-month intervals. The parameters included the time from entering the arena until mounting the phantom; the time from mounting the phantom until achieving erection; the time from achieving full erection until the start of ejaculation; duration of ejaculation; and the number of times the boar mounted the phantom. Characteristics of the ejaculates were also assessed. The libido parameter associated with the greatest efficacy of artificial insemination was the effectiveness of artificial insemination service, the time from entering the arena until the start of ejaculation. The significance of this trait for predicting ejaculation performance was analysed. The libido characteristics were classified into three categories: boars with a short reaction time to the phantom, boars with an intermediate reaction time, and boars with a long reaction time. For these groups, the characteristics of ejaculates collected at the start of the period during which ejaculates were collected and after three, six and nine months were determined. The sexual experience of boars was not associated with the expression of sexual behaviour because young boars during their first three months of ejaculate collections required less time to initiate ejaculation. The ejaculates with the greatest utility were obtained after six months of service. These ejaculates had the largest volume (255.22 mL), and the most insemination doses could be prepared from these ejaculates. On average, more than 23 insemination doses were prepared from ejaculates collected after six months of semen collections, which is about four doses more than from ejaculates collected at the start of artificial insemination service (p < 0.01).The time from entering the arena to beginning ejaculation can be used to predict a boar’s future libido. A relationship was shown between the level of libido and ejaculate characteristics. The ejaculates of the boars which needed the longest time to begin ejaculation at the start of semen collections had the greatest sperm concentration and number. In group 3, the boars’ejaculates contained about 6–9 × 109 more sperm than the ejaculates of boars from group 1. After six months of the experimental period, the difference was nearly 15 × 109 sperm (p < 0.05), and after nine months, it exceeded 22 × 109 sperm (p < 0.01).

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“…Phenotype relationship of the traits of sexual activity indicates the possibility of simultaneous improvement of these traits (Savić and Petrović, 2015b). A weak relationship (r<0.2000) exists between libido and intensity of ejaculation, but values of coefficients are positive what makes possible simultaneous improvement of both traits.…”

Section: Libidomentioning

confidence: 99%

Fertility of boars - what is important to know

Savić

Ausejo²,

Petrović

et al. 2017

BIOTEC ANIM HUSB

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The most important part in reproductive management is the control of boar fertility. A common division of fertility traits is on the: in vitro (sperm traits) and in vivo (return rate, farrowing rate and litter size traits) fertility. In many studies were found differences between breed in the both groups of fertility traits. Variability of sperm traits of boars during the reproductive exploitation is influenced by various genetic (boar, breed) and paragenetic factors/effects (age, season, intensity of use). Good libido is desirable characteristics in boars, but the knowlegde of the correlation of libido and boar fertility traits are limited. Also, there is no standardised procedure or methods for the estimation of libido of the boars. The permanent ranking of boars according to the reproductive efficiency should be performing. Good reproductive management implies the timely identification of boars with the low fertility (or close to the average).

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Effect of photoperiod on sexual activity of boar

Cited by 4 publications

References 11 publications

Concentrations of Boar Taint Compounds Are Weakly Associated with Sexual Behavior of Young Boars

Concentrations of Boar Taint Compounds Are Weakly Associated with Sexual Behavior of Young Boars

The Usefulness of Sexual Behaviour Assessment at the Beginning of Service to Predict the Suitability of Boars for Artificial Insemination

Fertility of boars - what is important to know

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