Reproductive parameters of miniature stallions

Paccamonti, D.; Buiten, Azuwerus van; Parlevliet, J. M.; Colenbrander, B.

doi:10.1016/s0093-691x(99)00078-3

Cited by 25 publications

(21 citation statements)

References 2 publications

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“…These findings are similar to earlier studies on full-size horses like Thoroughbred stallions and Tori breed stallions (Kavak et al 2003). It has earlier been demonstrated that DSO is lower and is reached earlier in Light horse breed⁄miniature stallions Paccamonti et al 1999;Kavak et al 2003) than in full-size horses Kavak et al 2003). In the present study, the overall percentages of morphologically normal spermatozoa in ejaculates collected on days 2, 5 and 10 were above 70% among the stallions, being significantly lower in ejaculate 2 (68.6%) compared with ejaculates 5 and 10 (72.9% and 75.3% respectively).…”

Section: Discussionsupporting

confidence: 91%

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Sperm Production and Sperm Morphology of Swedish Warmblood Stallions

Einarsson¹,

Dalin²,

Lundeheim

2009

Reprod Domestic Animals

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The present study investigated daily sperm output and sperm morphology of fresh semen in eight Swedish Warmblood stallions aged 5-8 years. They were used for artificial insemination, and their fertility during the breeding season of semen collection exceeded 60% per cycle. One ejaculate of semen was collected daily for 10 consecutive days from each stallion. The gel-free volume was measured, and the sperm concentration was assessed with a Bürker chamber. The volume of gel-free fraction was multiplied by the sperm concentration to give the total number of spermatozoa (TSN). Sperm morphology was examined in ejaculates collected on days 2, 5 and 10. An aliquot from each ejaculate was fixed in 1 ml formol-saline immediately after collection and examined under a phase-contrast microscope (magnification 1000x) to assess morphological abnormalities. Furthermore smears were prepared and stained according to Williams (carbolfuchsin-eosin) for a more detailed examination of the sperm heads under a light microscope (magnification 1000x). Analysis of variance was applied to data. Total spermatozoa number decreased progressively during the first 8 days of collection, and daily sperm output (DSO) was calculated as mean TSN of collections on days 8-10, being 6.4 x 10(9) spermatozoa. The overall percentages of morphologically normal spermatozoa in ejaculates collected on days 2, 5 and 10 were above 70%, being significantly lower in ejaculate 2 (68.6%) compared with ejaculates 5 and 10 (72.9% respectively 75.3%).

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Section: Discussionsupporting

confidence: 91%

“…It has earlier been demonstrated that DSO is lower and is reached earlier in Light horse breed/miniature stallions (Thompson et al. 1979; Paccamonti et al. 1999; Kavak et al.…”

Section: Discussionmentioning

confidence: 93%

Sperm Production and Sperm Morphology of Swedish Warmblood Stallions

Einarsson¹,

Dalin²,

Lundeheim

2009

Reprod Domestic Animals

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“…Testicular size and volume are direct measures of the amount of testicular parenchyma present, which in turn determines potential sperm production (Thompson et al 1979). Studies aimed to work out models for evaluation of breeding soundness evaluation have been performed both in full‐size stallions (Kenney et al 1983) and miniature stallions (Paccamonti et al 1999). Both breed and age influence testicular size in stallions (Thompson et al 1979; Pickett et al 1987).…”

Section: Introductionmentioning

confidence: 99%

Testicular Measurements and Daily Sperm Output of Tori and Estonian Breed Stallions

Kavak

Lundeheim

Aidnik

et al. 2003

Reprod Domestic Animals

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Kavak A, Lundeheim N, Aidnik M, Einarsson S: Sperm morphology in Estonian and Tori Breed stallions. Acta vet. scand. 2004, 45, 11-18.-The standard procedure for assessing the breeding potential of a stallion includes the parameter total number of spermatozoa classified as morphologically normal. This study investigated sperm morphology of fresh semen in randomly chosen Estonian (E, n=8) and Tori (T, n=7) breed stallions with proven fertility. Two ejaculates were examined from each stallion. An aliquot from each ejaculate was fixed in 1 mL formol-saline immediately after collection and examined with phase-contrast microscope at a magnification 1000x for all types of morphological abnormalities. Furthermore smears were prepared and stained according to Williams (carbolfuchsin-eosin) for a more detailed examination of the sperm heads with light microscope at a magnification 1000x. Analysis of variance was applied to the data, and results are presented as LSmeans (±SE). One T stallion that had a disturbance in the spermatogenesis and one 22-year-old E stallion were not included in the analyses. The T stallions had on average 57.5±4.1% and the E-stallions 74.4±3.8% morphologically normal spermatozoa (p=0.012). In 4 of 7 T stallions and 7 of 8 E stallions both ejaculates had >50% morphologically normal spermatozoa. There was a significant difference between breeds in mean percentage of proximal droplets (17.3± 2.7% and 2.9±2.5% for T and E stallions, respectively; p=0.003). semen; sperm morphology; horse.

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“…In verschiedenen Studien konnte gezeigt werden, dass die Rasse des Hengstes einen signifikanten Einfluss auf die Spermaqualität hat (Dowsett und Pattie 1982, Rousset et al 1987, Dowsett und Knott 1996, Paccamonti et al 1999. So sind bei Miniaturhengsten geringere Gesamtspermienzahlen zu erwarten als bei Hengsten großwüchsiger Rassen (Paccamonti et al 1999).…”

Section: Introductionunclassified

“…So sind bei Miniaturhengsten geringere Gesamtspermienzahlen zu erwarten als bei Hengsten großwüchsiger Rassen (Paccamonti et al 1999). Ähnliche Ergebnisse erzielten auch Dowsett and Knott (1996), die bei Ponies und Shetland Ponies im Vergleich zu 7 weiteren Rassen eine geringere Gesamtspermienzahl feststellten.…”

Section: Introductionunclassified

Semen traits of Hanoverian commercial stud stallions

Gottschalk¹,

Sieme²,

Martinsson³

et al. 2015

PHK

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Semen traits of Hanoverian commercial stud stallionsIn the present study, the semen quality traits gel-free volume, sperm concentration, total number of sperm, progressive motility and total number of motile sperm of 106 Hanoverian stallions of the National Stud Celle were investigated. In total 13.855 fresh semen reports of the years 2009 and 2010 were used for analysis. Mixed linear models were employed to estimate significance for the fixed effects of year, month, breeding station and age class of the stallion as well as the random effect of the stallion. The systematic effects of month, breeding station and age class of the stallion were significant for all semen traits. The year of semen collection showed significant influence on all semen traits but gel-free volume. Except for the sperm concentration the highest values for the semen traits were shown in the months June to August, the highest sperm concentration was in January to March. The random effect of the stallion accounted for 43 to 63 % on the total variance of the semen traits. An extended model with the interactions of stallion by year, month and breeding station increased the relative proportions of stallion specific effects to 55 -65 %. The interaction effects among stallion and year amounted to 6 -14 %, the interaction effects among stallion and breeding station to 8 -15 % and among stallion and month to 3 -8 %. In conclusion, semen quality is mainly determined by the stallion and in addition, significant interactions among stallions and environmental factors contribute to variations in semen traits.

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Reproductive parameters of miniature stallions

Cited by 25 publications

References 2 publications

Sperm Production and Sperm Morphology of Swedish Warmblood Stallions

Sperm Production and Sperm Morphology of Swedish Warmblood Stallions

Testicular Measurements and Daily Sperm Output of Tori and Estonian Breed Stallions

Semen traits of Hanoverian commercial stud stallions

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