Acrosomal Abnormality in Ram Spermatozoa due to Heat Stress

Rathore, A. K.

doi:10.1016/s0007-1935(17)48252-2

Cited by 11 publications

(11 citation statements)

References 4 publications

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“…Acrosomal damage was similar to that described by Purcel, Johnson & Rampacek (1972) resulting from cold shock. Rathore (1970) and Cameron (1971) also reported acrosomal damage in ram spermatozoa due to heat stress. In general the severity of semen changes was directly related to the duration of exposure to heat, although in some boars the incidence of abnormal sperm heads and tails was related to rectal temperatures, regardless of the total exposure time.…”

Section: Discussionmentioning

confidence: 97%

The effect of elevated ambient temperature on spermatogenesis in the boar

Cameron¹,

Blackshaw²

1980

Reproduction

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Boars were heated for 6 h/day in a climate chamber (mean maximum temperatures, 33.4 +/- 3.1--37.7 +/- 2.0 degrees C, and relative humidities 40--80%) for 4, 5 and 7 days respectively (4 boars/group). Significant increases in the proportion of morphologically abnormal spermatozoa were seen in all groups for the end of Week 2 and up to Week 5 after treatment. Boars exposed for 7 days were, in general, more severely affected. Ejaculate volumes, gel volumes, sperm concentration and daily sperm outputs were not affected significantly in any of the groups, although changes were seen in individual animals. In some boars heat stress early in the treatment period produced an acute rise in body temperature which appeared to have a greater effect on semen quality than did the duration of exposure.

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Section: Discussionmentioning

confidence: 97%

The effect of elevated ambient temperature on spermatogenesis in the boar

Cameron¹,

Blackshaw²

1980

Reproduction

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“…However, the sensitivity of spermatocytes to heat varies depending on the intensity of the insulation. Some spermatocytes degenerate while others continue spermatogenesis, often yielding abnormal spermatozoa (Rathore 1970;Malmgren and Larsson 1989).…”

Section: Discussionmentioning

confidence: 99%

“…Testicular function can be adversely affected by several factors such as malnutrition, infections, and environmental stress, and be disturbed by elevated ambient temperature (Moule and Waites 1963;Skinner and Louw 1966;Rathore 1970;Wettemann and Desjardins 1979;Larsson and Einarsson 1984;Miiller et al 1992), heat applied directly to the scrotum (Chowdhury and Steinberger 1970;Volgmayr et al 1971) or by scrotal insulation (Wildeus and Entwistle 1983;Malmgren 1989;Barth and Bowman 1994). Local heating or insulation of the scrotum for long periods (48 h or more) can result in a reduced sperm output and the production of semen characterized by reduced viability and abnormal morphology (Lagerlof 1934;Chowdhury and Steinberger 1970;Larsson and Einarsson 1984).…”

Section: Introductionmentioning

confidence: 99%

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

Januškauskas

Gil

Rodriguez‐Martinez

et al. 1995

Reprod Domestic Animals

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“…Semen quality depended on the environmental temperature (Alvarez et al, 1996;Bhuiyan & Shamsuddin, 1998;Mathevon et al, 1998a). Ambient temperature normalcy in spermatogenesis and epididymal function can also influence the quality of fresh and preserved semen (Rathore, 1970;Gustafsson et al,1972;Settergren & McEntee, 1992). However, the bulls of the present study were reared under more or less stable environmental conditions and apparently there were no indication of impaired spermatogenesis or epididymal dysfunction during clinical evaluation of fresh semen.…”

Section: Effect Of Ambient Temperaturesmentioning

confidence: 99%

Environment related variations in the semen characteristics of bulls used for Artificial Insemination (AI) programme in Bangladesh

Sarder

1970

Univ. j. zool. Rajshahi Univ.

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Abstract:The present study assessed the semen characteristics of bulls used for Artificial Insemination (AI) programme in Bangladesh with regard to season, ambient temperature and relative humidity. A total of 3720 semen samples from 71 bulls were collected from Central Cattle Breeding Station and Dairy Farm (CCBSDF), Savar, Dhaka, Rajshahi Dairy and Cattle Improvement Farm (RDCIF), Rajabarihat, Rajshahi and District Artificial Insemination Centre (DAIC), Rajshahi during 1995Rajshahi during -2002. Semen was collected by artificial vaginal method once a week. Different seasons viz. spring, summer, autumn and winter had significant effect (P<0.05) on colour, density, mass activity, sperm concentration, sperm motility, total sperm cells/ejaculate, total number of motile sperm cells/ejaculate, number of semen doses per collection and postfreezing motility of sperm. The maximum values of these semen characteristics were found in summer. Ambient temperature groups of <21°C, 21-25°C, 25-29°C and >29°C had significant (P<0.05) effect on all the semen characteristics except for volume of semen. The highest volume of semen was found at >29°C and the lowest at 25-29°C. The total number of sperm cells/ejaculate, total number of motile sperm cells/ejaculate and number of semen doses per collection were found in >29 °C temperature groups. Relative humidity groups of <65%, 65-75%, 75-85% and >85% had significant effect on all the semen characteristics excluding for volume of semen and number of semen doses per collection. The largest volume of semen, colour, mass activity, total sperm cells/ejaculate, total motile sperm cells/ejaculate and number of semen doses/collection were found in >85% relative humidity and the smallest in 65%-75% relative humidity. Finally, this study recommended that, summer season, ambient temperature groups of >29°C and Relative humidity groups of >85% are suitable for excellent semen characteristics.

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Acrosomal Abnormality in Ram Spermatozoa due to Heat Stress

Cited by 11 publications

References 4 publications

The effect of elevated ambient temperature on spermatogenesis in the boar

The effect of elevated ambient temperature on spermatogenesis in the boar

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

Environment related variations in the semen characteristics of bulls used for Artificial Insemination (AI) programme in Bangladesh

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