Effect of season and age on scrotal circumference, testicular parameters and endocrinological profiles in mithun bulls

Perumal, P.; Savino, Nicola; Sangma, C.T.R.; Chang, Sukkum Ngullie; Sangtam, Tzt; KHAN, M H; Singh, Gyanendra; Kumar, Brijesh; Yadav, Dushyant; Srivastava, N.

doi:10.1016/j.theriogenology.2017.04.049

Cited by 24 publications

(20 citation statements)

References 47 publications

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“…This is because semen quality is highly affected by testicular volume (Gündoğan, 2007) as mentioned above and scrotal circumference (Badi et al, 2018). Regardless of that, the effect of season in semen quality has been reported even in stallions (Janett et al, 2003), goats (Kumar et al, 2014) and Bulls (Perumal et al, 2017). Furthermore, although testosterone is not part of the current study, its high concentration during summer can explain these seasonal variations (Mallick et al, 2016).…”

Section: Discussionmentioning

confidence: 60%

Seasonal Variations in Semen Parameters of Zulu Rams Preserved at 10°C for 72 H During Breeding and Non-Breeding Season

Ngcobo

Nephawe

Maqhashu

et al. 2020

American Journal of Animal and Veterinary Sciences

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The study was conducted to evaluate the seasonal variations in semen parameters of Zulu rams preserved at 10°C for 72 h. The study site was the Agricultural Research Council (ARC) Irene, during the breeding season and the non-breeding season. Zulu rams (n = 6, age = 3 years and average weight = 35 kg ±2.29) were used in this study. Semen was collected with the aid of artificial vagina. Macroscopic (volume and pH), microscopic (sperm concentration, progressions, velocities and velocity ratios and morphology) semen parameters were evaluated immediately after semen collection. Data were analyzed using General Linear Model (GLM) in Minitab 17®. Semen volume was higher during breeding season (0.97±0.25 mL) than non-breeding season (0.72±0.5 mL). Total sperm motility was higher (92.01±1.40%) at 24h during breeding season than non-breeding season (88.69±1.40%), thereafter declined drastically in both seasons. However, non-breeding season yielded a high progressive motility (50.86±1.63%, 33.77±1.63% and 27.56±1.63%) after 24, 48 and 72 h than breeding season (21.32±1.63%, 11.89±1.63% and 10.29±1.63%). It was concluded that, semen parameters from Zulu rams does vary with seasons. Nevertheless, despite seasonal variations observed, Zulu rams' semen quality is acceptable in both breeding and non-breeding season hence can breed throughout the year. Notwithstanding, studies involving fertility are recommended and the nutrition effect of lambing during dry period should be considered.

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Section: Discussionmentioning

confidence: 60%

Seasonal Variations in Semen Parameters of Zulu Rams Preserved at 10°C for 72 H During Breeding and Non-Breeding Season

Ngcobo

Nephawe

Maqhashu

et al. 2020

American Journal of Animal and Veterinary Sciences

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“…Various factors such as vaccination (Perumal et al, 2013a;Perumal et al, 2013b;Perumal, 2014a;Perumal, 2014b;Perumal, 2018a), seasons (Perumal et al, 2015;Rajoriya et al, 2016;Perumal et al, 2017a;Perumal et al, 2017b), pathological condition of reproductive system (Perumal, 2013;Perumal et al, 2013c;Perumal et al, 2016a), inclusion of additives (Perumal et a., 2012a;Perumal et al, 2012b), glycerol (Baruah et al, 2016) and hereditary and congenital causes (Perumal et al, 2012c) are affect the semen production and its quality. Season/climatic factors/photoperiod and temperature humidity index is one of the most important factors that have effect on the variation in semen quality parameters and fertility rate (Perumal et al, 2017a). Heat tolerance as well as disease resistance capability of the indigenous cattle (Bos indicus) is better than Bos taurus exotic cattle bulls, characterized by lower percentage total sperm abnormalities (Rajoriya et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Melatonin in Semen Extender Improves Freezability in Mithun

Perumal¹

2019

IJBSM

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Melatonin plays important roles in circadian clock regulation and seasonal reproduction in mammals. It is also a potential antioxidant and anti-apoptotic agent in semen preservation. Season/climatic factors/photoperiod and temperature humidity index is one of the most important factors, effect on the variation in semen quality parameters (SQPs) and fertility rate. The present study was conducted to assess the effect of melatonin (MT) on SQPs at different seasons of the year such as sperm motility, viability, total sperm abnormality, intactness of acrosome, functional plasma membrane and nuclear integrity in mithun. A total numbers of 80 ejaculates (20 ejaculates in each season) were collected twice per week from mithun bulls by transrectal massage method and semen sample was divided into six equal aliquots and diluted with the Tris egg yolk citrate glycerol extender (TEYCGE). Group 1: semen without additives (control), group 2 to 6: semen was diluted with 1, 2, 3, 4 and 5 mM of melatonin, respectively. These SQPs were estimated in frozen thawed semen. Inclusion of melatonin into the diluent resulted in significantly (p<0.05) decreased dead and abnormal spermatozoa percentage and acrosomal abnormalities whereas significant improvement was observed in the sperm motility, viability, plasma membrane and nuclear integrity in treatment as compared to control group at different seasons of the year. The present study result clearly indicated that melatonin protected the post thaw SQPs in different seasons and also semen quality varied from different seasons and was significantly higher in spring and lowest was in summer season.

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“…Semen production and its quality profiles were affected by various factors like vaccination (Perumal et al, 2013a;Perumal et al, 2013b;Perumal, 2014a;Perumal, 2014b;Perumal, 2018a), seasons (Perumal et al, 2015;Rajoriya et al, 2016;Perumal et al, 2017a;Perumal et al, 2017b), pathological condition of reproductive system (Perumal, 2013;Perumal et al, 2013c;Perumal et al, 2016a), inclusion of additives (Perumal et al, 2012a;Perumal et al, 2012b;Perumal et al, 2013e;Perumal, 2019), glycerol (Baruah et al, 2016 and hereditary and congenital causes (Perumal et al, 2012c) are. Photoperiod, temperature and relative humidity are the most important factors influence the semen production, its quality parameters and fertilization capacity (Perumal et al, 2017a). Thermo tolerance and tolerance on disease infection of the indigenous cattle (Bos indicus) is significantly higher exotic bovine species like Bos taurus as characterized by reduced percentage of total sperm abnormalities and higher progressive motility (Rajoriya et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Inclusion of Melatonin in Semen Extender Modulates Post Thaw Motility and Velocity Pa-rameters of Mithun Sperm

Perumal¹

2019

IJBSM

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and circadian clock regulation in the mammals. It also a powerful antioxidant and anti-apoptotic compound in semen cryopreservation. Environmental parameters like daylength, temperature and relative humidity are important factors to determine the variation in semen production, its quality profiles and fertilizing ability of the sperm. Therefore, a study was designed to assess MT effect on mobility and velocity parameters by computer assisted sperm analyser (CASA) at different seasons in mithun. Total of 80 ejaculates (20 ejaculates per season) were collected from mithun twice per week by transrectal massage method and ejaculates were grouped into six equal, processed and diluted with standard Tris-egg yolkcitrate-glycerol-extender (TEYCGE). Gr1: extender without additives (control), Gr 2 to 6: extender extended with MT 1, 2, 3, 4 and 5 mM, respectively. CASA profiles were measured in frozen thawed semen. Addition of MT in the extender has significantly (p<0.05) minimized the static velocity or dead spermatozoa, simultaneously significant improvement was in sperm total motility (TM), forward progressive motility (FPM), average path velocity (VAP), curvilinear velocity (VCL), straight line velocity (VSL), amplitude of lateral head displacement (ALH), beat cross frequency (BCF), straightness (STR), linearity (LIN) and rapid velocity in treatment as compared to control group at different seasons of the year. The present study result clearly indicated that melatonin protected the post thaw CASA parameters in different seasons and also semen quality varied from different seasons and was significantly higher in spring and lowest was in summer season.

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Effect of season and age on scrotal circumference, testicular parameters and endocrinological profiles in mithun bulls

Cited by 24 publications

References 47 publications

Seasonal Variations in Semen Parameters of Zulu Rams Preserved at 10°C for 72 H During Breeding and Non-Breeding Season

Seasonal Variations in Semen Parameters of Zulu Rams Preserved at 10°C for 72 H During Breeding and Non-Breeding Season

Melatonin in Semen Extender Improves Freezability in Mithun

Inclusion of Melatonin in Semen Extender Modulates Post Thaw Motility and Velocity Pa-rameters of Mithun Sperm

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