Seasonal variation in seminal parameters, testicular size, and plasma testosterone concentration in Iranian Moghani rams

Zamiri, Mohammad Javad; Khalili, B.; Jafaroghli, M.; Farshad, Abbas

doi:10.1016/j.smallrumres.2010.07.013

Cited by 48 publications

(49 citation statements)

References 15 publications

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“…The semen pH in this current trial may imply that the 10 -15 minute waiting period (to prevent further sperm cell metabolism), is an aspect to be considered and pH is to be measured immediately. The delay in the processing of the fresh undiluted semen has been reported to possibly induce the semen pH to become more acidic, due to degradation of fructose by the sperm cells (Hafez & Hafez, 2000;Zamiri et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…Evans & Maxwell (1987) reported that an ambient temperature of below 10 °C affected sperm quality negatively. High summer temperatures were generally found to affect sperm motility to a lesser degree (Zamiri et al, 2010). Zamiri et al (2010) reported a wide range of percentage live ram sperm in the ejaculates, varying between 60% and 90%.…”

Section: Discussionmentioning

confidence: 99%

“…The collected semen was stored at 32 °C in a water bath, and the evaluation was performed within 10 to 15 minutes of collection (Bester, 2006;Zamiri et al, 2010). Immediately after semen collection, the following parameters were evaluated: semen volume, semen colour, semen pH, semen wave motion, sperm motility, sperm concentration (density), sperm viability (percentage live vs. dead sperm) and sperm morphology (abnormalities).…”

Section: Methodsmentioning

confidence: 99%

“…Low magnification under a phase contrast microscope was used (x40 magnification) for this microscopic evaluation. A total of 100 sperm cells was evaluated for each semen sample, and was classified as motile or non-motile sperm and expressed as a percentage (Zamiri et al, 2010). vi)…”

Section: Methodsmentioning

confidence: 99%

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Seasonal variation in semen quality of Dorper rams using different collection techniques

Malejane¹,

Greyling

Raito

2014

SA J. An. Sci.

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The aim of the study was to evaluate the seasonal variation in semen quality of Dorper rams using different semen collection techniques. The study was carried out from January 2012 to January 2013. A general management programme for health control was followed, with water being provided ad libitum throughout the trial, and all rams being fed a 2.5 kg maintenance diet per day. Eleven mature Dorper rams, recording a mean body weight of 69.6 ± 9.2 kg and mean age of 18 ± 4.7 months, were used in the trial. A group of six rams were trained for semen collection with the aid of the artificial vagina (AV), while in the remaining five rams, semen was collected using the electro ejaculator (EE). Immediately after collection, ejaculates were evaluated macroscopically and microscopically for semen volume, semen colour, semen pH, semen wave motion, sperm motility, sperm cell concentration, sperm viability and morphology. The results of the trial generally showed that semen in Dorper rams may be collected using the AV or EE methods throughout the year. However, an overall significant better semen quality collected by the AV versus the EE collection method was recorded. Generally, semen of significantly higher quality was recorded in summer, autumn and spring (both collection techniques). The tendency in the current trial was that the EE technique of semen collection was the less reliable method. Consequently the AV is recommended as the more acceptable method of semen collection in the Dorper. Winter is not generally recommended for semen collection, especially when using the EE. ______________________________________________________________________________________

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Seasonal variation in semen quality of Dorper rams using different collection techniques

Malejane¹,

Greyling

Raito

2014

SA J. An. Sci.

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“…In relation to male goats, greater knowledge of their reproductive variations during the year can help with breeding and husbandry decisions. Thus, it can define the period of the year during which the semen has the best parameters for cryopreservation (Zamiri et al, 2010), which can consequently increase reproductive indexes while maintaining an adequate male:female proportion and also allow for a decrease in the maintenance costs associated with a reduction in the number of breeding (Roca et al, 1992;Barkawi et al, 2006). Moreover, males with better sexual behaviors in high temperature conditions can be selected for the development of breeds that are adapted to tropical climates (Pacheco and Quirino, 2010).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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-This study analyzed seasonal variations in the testes, the concentration of sex hormones, the parameters of fresh and thawed semen, and the sexual behavior of male Alpine goats from a temperate region in a tropical climate and possible interference with fertility. The maximum and minimum temperature and luminosity were recorded daily, while seminal, hormonal, and behavioral assessments were carried out every fortnight. The maximum and minimum temperature (°C) and luminosity (h) were recorded daily always at 17.00 h. The scrotal circumference (cm), testicular volume (mL), volume (mL), appearance (creamy, milky, aqueous) and coloration (white, white-yellowish, and yellowish) seminal, turbulence or mass movement (0 to 5), progressive spermatic motility (0 to 100%), spermatic force (0 to 5), concentration (spermatozoids/mL), spermatic pathologies, hypoosmotic test (%), serum levels of FSH (mUI/mL), LH (mUI/mL), testosterone (ng/mL), and sexual behaviors were carried out every fortnight. There was a difference between the scrotal circumference evaluated monthly, testicular volume, volume and concentration of fresh semen, sperm vigor of the thawed semen, serum levels of testosterone, FSH and LH, and some sexual behaviors. Thus, the changes that occur in the quantity and quality of sperm, in the hormonal profile, and in sexual behaviors should not be regarded as an impediment to the use of male Alpine goats in tropical climates throughout the year. These variations do not lead to changes in the semen that may compromise the fertility of these animals.

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The influence of dietary sunflower oil, rich in n‐6 polyunsaturated fatty acids, in combination with vitamin C on ram semen parameters, sperm lipids and fertility

et al. 2019

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BACKGROUND Dietary fats, fed to ruminant animals, have been observed to improve reproductive function. Sunflower oil is one of the richest sources of polyunsaturated fatty acids (PUFAs), over 60% of which is linoleic acid (C18:2). With regard to recommendations for increased consumption of PUFAs, special emphasis has been given to the importance of consuming more antioxidants to prevent lipid peroxide formation. This study evaluated the effects of dietary n‐6 PUFAs and vitamin C (VC) in rams – in particular, on semen quality, blood metabolites, sperm lipids and overall fertility. RESULTS Diets supplemented with SFO and VC increased the proportion of motile sperms and their progressive motility improved (P < 0.01). Rams fed a diet containing SFO had an increased proportion of sperms with normal acrosomes in their semen samples (P < 0.01). The highest levels of lactate dehydrogenase activity (LDH) enzyme were found in control rams (2.60 U mL−1). Feeding SFO significantly affected blood triglyceride and cholesterol concentrations (P < 0.05). Diets containing SFO increased the proportion of C18:2c, C20:4, C20:3 and C22 in the sperm lipid composition (P < 0.05). Semen of SFO and VC‐fed rams was more fertile than that of control rams when it was artificially inseminated to ewes. CONCLUSION Feeding rams with supplemental SFO and VC increased semen quality and improved fertility rates. © 2019 Society of Chemical Industry

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Seasonal variation in seminal parameters, testicular size, and plasma testosterone concentration in Iranian Moghani rams

Cited by 48 publications

References 15 publications

Seasonal variation in semen quality of Dorper rams using different collection techniques

Seasonal variation in semen quality of Dorper rams using different collection techniques

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

The influence of dietary sunflower oil, rich in n‐6 polyunsaturated fatty acids, in combination with vitamin C on ram semen parameters, sperm lipids and fertility

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