Seasonal variation in the reproductive activity of male goats raised under tropical climate conditions

Dias, Júlio César Oliveira; Veloso, Cristina Mattos; Santos, Madriano Christilis da Rocha; Oliveira, Carlos Thiago Silveira Alvim Mendes de; Silveira, Camila; Iglesias, Erick; Maitan, Paula Piccolo; Sanglard, Letícia P

doi:10.1590/s1806-92902017000300003

Cited by 12 publications

(9 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The baseline LH obtained in this study is lower than 2.31±0.06 Miu/ml and 31.38 ± 37.75 Miu/ml reported in Nsuka(Okpe & Anya, 2017) and Abeokuta (Oloye et al, 2017) respectively, both studies were conducted in West African dwarf goats in southern, Nigeria. However, the baseline LH obtained in this study agrees with 0.36±0.17 Miu/ml found in Alpine goats in Brazil(Dias et al, 2017). The baseline TEST level in this study (3.92±6.39 ng/ml) is higher than 1.0±1.21 ng/ml (Oloye et al, 2017), 2.83±0.49 ng/ml reported by Dias et al (2017) and 2.97±0.03 ng/ml reported byOkpe & Anya (2017).…”

supporting

confidence: 90%

Short-term effect of Tramadol injection on the serum levels of Follicle Stimulating Hormone, Luteinizing Hormone and Testosterone in Male Sahel Goats in Maiduguri, Nigeria

Bako

Malami²,

Sadiq³

et al. 2019

IJPT

View full text Add to dashboard Cite

Tramadol is a synthetic analogue of codeine. Its mood elevation property and sex enhancement potentials are the main reason for its abuse. The aim of the study was to determine the short-term effect of tramadol administration on Follicle Stimulating Hormone (FSH), Luteinizing Hormone (LH) and Testosterone (TEST) levels in Male Sahel Goats. This was an experimental study conducted from 1st October 2017 to 12th November 2017 at the Livestock Teaching and Research Farm, University of Maiduguri, Maiduguri, Borno State Nigeria involving 20 Male Sahel Goats. The goats were divided in to 4 groups of 5 each; group 1 served as control and groups 2, 3 and 4 were injected intramuscularly with 4 mg/kg (low dose), 8 mg/kg (medium dose) and 12 mg/kg (high dose) of Tramadol respectively. The injections were given intramuscularly, 3 times a week for 4 weeks. Blood samples were collected to determine the serum levels of FSH, LH and TEST at 0, 1 week, 2 weeks, 3 weeks and 4 weeks of tramadol injections. The Mean±SD of the hormones were computed using SPSS 20. The difference in mean was compared using t test and ANOVA with p < 0.05 set for statistical significance. The baseline levels of FSH, LH and TEST in Male Sahel Goat in Maiduguri were 2.91±5.74 Miu/ml, 0.29±0.72 Miu/ml and 3.92±6.39 ng/ml respectively. Only the goats in group 4 showed a significant increase in serum FSH and LH by the 4th week (P=0.01 and 0.03 respectively) while no significant change was noted in the other groups. The was a decline in the level of Testosterone from 1st week through 4th week in all the experimental group but the level in the control group remain fairly constant throughout the experiment. The decline is inversely proportional to the dose of tramadol injection and most marked in group 4.High dose and prolonged used of Tramadol should be avoided because of side effects of Hypergonadotrophic hypogonadism.

show abstract

supporting

confidence: 90%

Short-term effect of Tramadol injection on the serum levels of Follicle Stimulating Hormone, Luteinizing Hormone and Testosterone in Male Sahel Goats in Maiduguri, Nigeria

Bako

Malami²,

Sadiq³

et al. 2019

IJPT

View full text Add to dashboard Cite

show abstract

“…Dias et al. (2017) declared the highest concentrations of T in summer and autumn. Moreover, Ait et al.…”

Section: Discussionmentioning

confidence: 99%

“…This activity can be actively involved in regulating the reproductive performance of the testis (Carreau et al, 2007). Dias et al (2017) declared the highest concentrations of T in summer and autumn. 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

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.

show abstract

“…However, total acrosome damage was surprisingly lower ( p < 0.05) in samples collected in spring just after washing and after 3 h incubation in control media. This finding could be related to physiological or structural differences of sperm membranes during the non-breeding season [ 37 ], although age and season had no identifiable effect on the acrosome integrity after incubation in IVF media.…”

Section: Discussionmentioning

confidence: 99%

The Re-Addition of Seminal Plasma after Thawing Does Not Improve Buck Sperm Quality Parameters

Ohaneje

Osuagwuh

Álvarez‐Rodríguez

et al. 2021

Animals

View full text Add to dashboard Cite

In order to achieve a higher post-thaw buck sperm quality, an approach in the thawing protocol of cryopreserved sperm doses under in vitro capacitation conditions mimicking the in vivo female environment was studied. Therefore, functional and kinetic characteristics of buck thawed sperm from males of different ages, the season of collection, and melatonin implanted males in the non-breeding season were assessed after 3 h of incubation in an in vitro fertilization (IVF) media with 20% of buck seminal plasma (SP). Previously, fresh ejaculates were collected via artificial vagina from eight males of the Cabra Blanca de Rasquera breed during two consecutive years in breeding and non-breeding periods. Prior to semen collection in non-breeding seasons, males were split into two groups: one group was implanted with melatonin, while the other was not. In each group, semen samples were pooled, centrifuged, and diluted in an extender containing 15% powdered egg yolk and 5% glycerol before freezing. After thawing, sperm were washed and incubated in three different media: (a) control media (modified phosphate-buffered saline (PBS), (b) IVF commercial media, and (c) IVF media + 20% SP. Sperm motility was evaluated by CASA, while plasma and acrosome membrane integrity, mitochondria activity, and DNA fragmentation were analysed by flow cytometer at 0 h and after 3 h incubation. A significant reduction in motility, mitochondrial activity, plasma, and acrosome membrane integrity were observed after incubation in the presence of SP, although similar to that observed in IVF media alone. DNA integrity was not affected under in vitro capacitation conditions, regardless of SP addition. In conclusion, the addition of SP failed to improve post-thaw buck sperm quality under in vitro conditions irrespective of male age, the season of collection, and melatonin implant.

show abstract

Seasonal variation in the reproductive activity of male goats raised under tropical climate conditions

Cited by 12 publications

References 31 publications

Short-term effect of Tramadol injection on the serum levels of Follicle Stimulating Hormone, Luteinizing Hormone and Testosterone in Male Sahel Goats in Maiduguri, Nigeria

Short-term effect of Tramadol injection on the serum levels of Follicle Stimulating Hormone, Luteinizing Hormone and Testosterone in Male Sahel Goats in Maiduguri, Nigeria

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

The Re-Addition of Seminal Plasma after Thawing Does Not Improve Buck Sperm Quality Parameters

Contact Info

Product

Resources

About