Effects of a Brief Elevation of Scrotal Temperature on the Post‐thaw Viability of Bull Semen

Januškauskas, Aloyzas; Gil, J.; Rodriguez‐Martinez, Heriberto; Söderquist, L.; Lundeheim, N.

doi:10.1111/j.1439-0531.1995.tb00624.x

Cited by 17 publications

(18 citation statements)

References 26 publications

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“…Possible reasons might be the severe testicular dysfunction of permanent nature in the poor grade semen producer bulls, since it was evident with consistently higher occurrences of both primary and secondary or major and minor sperm morphological abnormalities in their ejaculates in younger as well as at older age. Higher percentage of proximal cytoplasmic droplets was reported to be associated with epididymal dysfunction when induced by thermal insult to mimic the environmental stress (Wildeus and Entwistle, 1983;Januskauskas et al, 1995). In non-freezing grade semen producer Frieswal bulls have higher prevalence of proximal and distal cytoplasmic droplets both at younger and older age suggested for epididymal dysfunctions too.…”

Section: Discussionmentioning

confidence: 97%

Effect of age on spermiogram of Holstein Friesian × Sahiwal crossbred bulls

Mandal

Kumar

Tyagi

2010

Animal

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This study was conducted on 94 Frieswal (5/8 Holstein Friesian 3/8 Sahiwal) crossbred bulls of three different grades, categorized based on their semen freezability visualising Group 1 (consistently freezable semen producer bulls, N 5 11), Group 2 (inconsistent freezable, N 5 16) and Group 3 (Non freezable, N 5 67). Each group was further divided into two classes that is young (up to 30 months) and adult (31 to 70 months) bulls depending upon their age. Sperm morphology was studied by using the eosin-nigrosin staining technique. Bulls age significantly (P , 0.01) affected semen quality and sperm morphology. In adult bulls, semen volume, mass activity and sperm concentration were 36%, 17.56% and 19.6%, respectively, higher than young. Initial progressive motility (%) and livability showed significant (P , 0.01) improvement with the advancement of age (43.37 6 1.21 and 67.71 6 1.11, respectively, in young; 53.02 6 1.11 and 74.17 6 1.03, respectively, in adult). In young bulls, sperm head, mid piece, tail abnormality and total abnormal sperm percent (12.38 6 0.92, 4.87 6 0.24, 11.01 6 0.60 and 28.26 6 1.34, respectively) were 1.85, 1.27, 1.20 and 1.44 folds higher than that of their mature stage (6.69 6 0.64, 3.82 6 0.32, 9.14 6 0.64 and 19.66 6 1.31, respectively). Significant reduction (P , 0.01) in micro cephalic sperm, free heads, bent mid piece, looped mid piece and proximal protoplasmic droplets were observed at mature age as compared with their younger stage. In bulls of consistent freezing category, abnormal sperm heads significantly decreased from 4.40 6 0.31% to 3.28 6 0.02% on maturity. Similarly, in inconsistent freezing grade bulls sperm head abnormality (9.28 6 0.75% to 5.13 6 1.20%) and total abnormal sperm percent (24.89 6 1.43 to 18.73 6 3.40) was decreased over the age. On the contrary, in non-freezing category bulls' sperm morphology did not show significant (P . 0.05) improvement with age advancement, rather some abnormalities like long slender head, under developed/deformed head, abaxial implantation of mid piece, double mid piece, stump tail and distal protoplasmic droplets tend to increased significantly (P , 0.05) with age of bulls. Results indicated that in potential Frieswal bulls semen quality and sperm morphology were improved from young to mature stage, where as, in poor quality (non-freezing) semen producer bulls neither the morphology nor the semen quality showed any improvement with maturity. It was recommended that crossbred bulls producing more than 25% morphologically abnormal sperms in young age (below 30 months) along with poor progressive motility (,50%) and low sperm concentration (,1000 million/ml) need immediate culling with out any expectation of further improvement in semen quality with age advancement.Keywords: Sperm abnormality, Frieswal crossbred bull, Sperm morphology, Bos indicus 3 Bos taurus Implication Assessment of sperm morphology is one of the most important aspects for semen evaluation and successful fertilisation. High percentage of morphologically abnormal spe...

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Section: Discussionmentioning

confidence: 97%

Effect of age on spermiogram of Holstein Friesian × Sahiwal crossbred bulls

Mandal

Kumar

Tyagi

2010

Animal

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“…Nevertheless, a short period of mild scrotal insulation is sufficient to affect post‐thaw sperm viability negatively (Vogler et al. 1991; Januskauskas et al. 1995).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Season on Semen Characteristics and Freezability in Bos indicus and Bos taurus Bulls in the Southeastern Region of Brazil

Koivisto

Costa

Perri

et al. 2009

Reprod Domestic Animals

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The objectives of this study were to evaluate the effects of season in southeast of Brazil comparing genotypes on semen characteristics, freezability and peripheral plasma concentrations of testosterone. Ejaculates of five Bos indicus bulls and six Bos taurus bulls were evaluated over a period of 27 months, which was divided into winter (July, August, September), spring (October, November, December), summer (January, February, March) and autumn (April, May, June). Semen was evaluated according to standard procedures for ejaculate volume, sperm concentration, gross-motility, progressive motility and sperm morphology. After preparing and freezing the ejaculates according to commercial procedures, the straws were stored in liquid N(2) until post-thaw evaluation. Ejaculate volume, sperm concentration, gross-motility, progressive sperm motility, vigor and morphological sperm defects were significantly influenced by season and genotype (p < 0.05). Heat tolerance was better in B. indicus bulls than in B. taurus bulls characterized by lower values of sperm abnormalities throughout the observation period. The highest values were recorded for abnormal heads followed by cytoplasmatic droplets in B. taurus bulls. The proportion of ejaculates which were eliminated before freezing for reasons of bad quality was lower in the B. indicus bulls. Temporal changes in peripheral plasma testosterone concentrations were higher in B. indicus bulls than in B. taurus bulls not revealing seasonal influences. The results of this study show clear genotype differences regarding semen quality. Freezability of B. taurus semen varies considerably throughout the year, leading to a high proportion of eliminated ejaculates. Collecting semen from B. taurus bulls during the summer in an artificial insemination centre may not be profitable.

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“…Increase in core body temperature during summer leads to increase in testicular temperature results in epididymal dysfunction and decrease in activity of enzymes responsible for spermatogenesis and impaired the normal process of reproduction. Januskauskas et al (1995) reported that semen quality at any time is likely to reflect the environmental influences upon the sensitive stages of spermatogenesis, which is highly sensitive to even short increases in scrotal temperature, in Bos taurus AI sires kept in temperate regions. In summer, extreme heat stress causes physical exhaustion, which might reduce the eagerness of the bulls and thus, result in higher reaction time and total time for successful ejaculation, thus having an ultimate effect on production of sperms (Mandal et al, 2000).…”

Section: Advances In Animal and Veterinary Sciencesmentioning

confidence: 99%

Effect of Season on Semen Quality of Crossbred (Karan Fries) Bulls

Bhakat¹,

Mohanty²,

Gupta³

et al. 2014

Adv. Anim. Vet. Sci.

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| One hundred and fifty six ejaculates from eight Karan Fries (KF) bull were collected to study the effect of season (summer, rainy and winter) on semen quality parameters at Artificial Breeding Research Centre, NDRI, Karnal, India. The data was analysed using least square analysis. Season had no significant effect on ejaculate volume, mass activity, total sperm output and pH of the semen, whereas it had significant (P<0.05) effect on initial motility, non-eosinophilic count and acrosome integrity of sperms as well as highly significant (P<0.01) effect on HOST, sperm concentration, sperm abnormalities and osmolality of semen in KF bulls. The results clearly indicate that during summer season, the highest values of sperm abnormalities, pH and OSMOL and lowest values of IM, SPC, SPCE, LIVE, HOST and AI was observed. During winter season highest magnitude of MA, IM, SPC, SPCE, LIVE, HOST and AI and lowest value of VOL, sperm abnormalities, pH and OSMOL were observed in KF bulls. It was concluded that the semen qualities were optimal during winter, poor during summer and intermediate during rainy

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Effects of a Brief Elevation of Scrotal Temperature on the Post‐thaw Viability of Bull Semen

Cited by 17 publications

References 26 publications

Effect of age on spermiogram of Holstein Friesian × Sahiwal crossbred bulls

Effect of age on spermiogram of Holstein Friesian × Sahiwal crossbred bulls

The Effect of Season on Semen Characteristics and Freezability in Bos indicus and Bos taurus Bulls in the Southeastern Region of Brazil

Effect of Season on Semen Quality of Crossbred (Karan Fries) Bulls

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