Sexual Activity and Sperm Production of Charolais and Ile-De-France Rams in Different Seasons of the Year

Мамонтова, Тетяна Василівна

doi:10.15389/agrobiology.2021.4.752eng

Cited by 6 publications

(9 citation statements)

References 29 publications

(34 reference statements)

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“…At the same time, objectivity requires emphasizing that the Ile‐de‐France rams had fairly high values of ejaculate volume both in breeding and in non‐breeding season, and its variability was insignificant, unlike the other three breeds. Similar results were obtained in the Mamontova study et al (2021).…”

Section: Resultssupporting

confidence: 92%

“…For instance, rams are sexually active throughout the year. However, semen quality and quantity, as indicators of reproductive efficiency in male small ruminants, are affected dramatically by the environment in temporary and permanent ways, which include ambient temperature, period of daylight, age, feeding, conditions during semen collection and management (Kulaksız et al, 2019; Mamontova et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal changes in testis size, testosterone levels and sperm production quality in meat rams

Aibazov

Trukhachev

Selionova

et al. 2022

Reprod Domestic Animals

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The aim of the present study was to evaluate seasonal changes in testes size, serum testosterone (T) levels and sperm production characteristics of 24 adult (2-3 years old) rams of meat breeds: Charollais (n = 6), Ile de France (n = 6), Dorset (Polled) (n = 5) and Dorper (Dorper, n = 7). Semen was collected with artificial vagina using a female in spontaneous oestrus (September-November, breeding season, BS) or a female with induced oestrus (March-July, non-breeding season, NBS). A total of 672 ejaculates were examined. Jugular vein blood was collected to determine testosterone levels during BS and NBS, and serum was extracted. Results of the present study indicate that there was no significant change in parameters such as body weight (kg) and testes length, both right and left, during BS and NBS, irrespective of the breed. The remaining metrics of testes differ in varying degrees between breeds of rams (with the exception of the Dorper breed) between BS and NBS. No significant variation in these parameters was found in Dorper rams. For all breeds, season had a statistically significant effect on important parameters such as total sperm count and progressive sperm motility after thawing. There was also significant seasonal variation in ejaculate volume across the three breeds, excluding il-de-France rams. The most constant was the sperm concentration, which was unchanged in BS and NBS in the three breeds, excluding Dorset rams, which showed a slightly significant decrease in this indicator in the non-breeding season. The serum content of the major male hormone testosterone (T) in rams of all breeds showed significant changes between BS and NBS, decreasing by a highly significant amount in the non-breeding season.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Seasonal changes in testis size, testosterone levels and sperm production quality in meat rams

Aibazov

Trukhachev

Selionova

et al. 2022

Reprod Domestic Animals

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“…In addition to that, semen concentration was not significantly different Table (1). This result was supported by [30,31] but disagreed with [11,23]. The semen concentration of current results was in accordance with the normal concentration range (1.6-6.0 ) 109 sperm/ml [32].…”

Section: Effect Of Genetics Group On Semen Physical Traitsmentioning

confidence: 37%

Effect of Breeds on some Semen Characteristics of Awassi Ram and Its Crossbreed

Al-Janabi,

Habeeb,

Al-Qasimi

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Ram fertility is important for herd productivity. However, low fertility of local Awassi sheep is present. The objective of this study was to study the effect of Awassi, Krishi, and its crossbreed on some physical and chemical semen characteristics. Twelve rams were used in the study, including (4) Awassi, (4) Krishi, and (4) Crossbreed (Awassi X Krishi). Semen was collected from all rams. Samples were evaluated immediately following collection. Volume, concentration, mass activity, individual motility, live and dead sperm (%), abnormal sperm (%), pH, Aspartate aminotransferase (G.O.T), alanine aminotransferase (G.P.T), and alkaline phosphatase (ALP) were evaluated in this study. The results indicated that the mass activity and individual motility were significantly greater (P<0.01) in (Awassi X Krishi) compared to Awassi and Krishi, respectively. Also, life sperm was significantly greater in (Awassi X Krishi) compared to Krishi but not Awassi Ram. In addition, dead and abnormal sperm was significantly reduced in (Awassi X Krishi) compared to Krashi but did not differ from Awassi. However, volume, concentration, pH, G.O.T, G.P.T, and ALP were not significantly different among groups. In conclusion, ram semen characteristics differed between breeds. This research brings new promising results regarding crossbreeding (Krishi X Awassi) on sperm parameters. An additional study is prepared to evaluate the effect of breed on antioxidant parameters.

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“…On the other hand, with regard to the physiological differences that may exist between hair and wool rams from a reproductive point of view, it should be mentioned that the reproductive seasonality is longer and more pronounced in wool rams, and they show a longer seasonality due to their greater body weight, with each breed responding to the photoperiod depending on the latitude at which they are commercially exploited ( Ungerfeld, 2012 ). In this case, woolly males show seasonal variations in semen quality and sexual activity, the duration of which is less pronounced compared to ewes ( Mamontova et al, 2021 ; Aibazov et al, 2022 ). Consequently, woolly sheep breeds are characterised by different photoreactivity, where the effect of seasonality and circadian variations on sexual behaviour and semen quality in rams has been studied from tropical latitudes to both poles of the earth ( Godfrey et al, 1998 ; Mamontova et al, 2021 ).…”

Section: Reproductive Seasonality Of Ramsmentioning

confidence: 89%

Systematic review of hormonal strategies to improve fertility in rams

Garza-Brenner,

Sánchez-Dávila,

Mauleón-Tolentino

et al. 2024

Anim. Reprod.

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Sexual Activity and Sperm Production of Charolais and Ile-De-France Rams in Different Seasons of the Year

Cited by 6 publications

References 29 publications

Seasonal changes in testis size, testosterone levels and sperm production quality in meat rams

Seasonal changes in testis size, testosterone levels and sperm production quality in meat rams

Effect of Breeds on some Semen Characteristics of Awassi Ram and Its Crossbreed

Systematic review of hormonal strategies to improve fertility in rams

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