Seasonal variation of plasma testosterone levels in Algerian male Arabia goats

Amrane, A. Ait; Hammoudi, S. M.; Belhamiti, B. T.; Selles, Sidi Mohammed Ammar; Redha, Benia Ahmed; Kaidi, Rachid

doi:10.5897/ajb2013.12131

Cited by 5 publications

(1 citation statement)

References 16 publications

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“…Moreover, Ait et al. (2013) suggested that plasma T concentrations of Arab goats were significantly higher in autumn (6.15 ± 3.81 ng/ml) compared to spring season (0.90 ± 1.27 ng/ml).…”

Section: Discussionmentioning

confidence: 99%

Relative expression of aromatase in the male goat reproductive organs during different seasons

Sobhani

Vaziry

Farzinpour

et al. 2022

Reprod Domestic Animals

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Aromatase, a member of the cytochrome P450 superfamily (encoded by CYP19), is the enzyme responsible for the aromatization of androgens into estrogens which is the last step of estrogen biosynthesis. It plays an important role in reproduction and sexual development. The aromatase expression in many tissues and organs of different species is shown in the last two decades’ investigation. This study was conducted to determine the relative seasonal expression of aromatase mRNA in testis, epididymis, vas deferens, prostate and seminal vesicle of a male goat. The aromatase expression of 16 male goat reproductive organs, slaughtered in the different seasons (n = 4 each season), were determined by quantitative real‐time polymerase chain reaction (qRT‐PCR). Results showed that during the autumn, aromatase mRNA expression of the testis was found to be significantly higher (p < .05) as compared to the spring and summer seasons. Higher aromatase mRNA expression was also found in the epididymis and seminal vesicle organs during the autumn and summer seasons. Interestingly, prostate and vas deferens aromatase mRNA expression during the summer was higher than in other seasons. The aromatase mRNA level analysis revealed that aromatase is expressed in all the examined reproductive organs in which a strong expression signal was detected in the testis and epididymis tissues. This study shows the expression of the aromatase in the goat reproductive organs in the breeding season which resembles other mammals with continuous breeding.

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“…Moreover, Ait et al. (2013) suggested that plasma T concentrations of Arab goats were significantly higher in autumn (6.15 ± 3.81 ng/ml) compared to spring season (0.90 ± 1.27 ng/ml).…”

Section: Discussionmentioning

confidence: 99%

Relative expression of aromatase in the male goat reproductive organs during different seasons

Sobhani

Vaziry

Farzinpour

et al. 2022

Reprod Domestic Animals

View full text Add to dashboard Cite

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Evaluation of male reproductive hormones of Kalahari Red and Kalawad goat bucks as affected by age and season under tropical conditions

Odeyemi,

Shittu,

Odeyemi

et al. 2024

Trop Anim Health Prod

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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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Seasonal variation of plasma testosterone levels in Algerian male Arabia goats

Cited by 5 publications

References 16 publications

Relative expression of aromatase in the male goat reproductive organs during different seasons

Relative expression of aromatase in the male goat reproductive organs during different seasons

Evaluation of male reproductive hormones of Kalahari Red and Kalawad goat bucks as affected by age and season under tropical conditions

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

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