Indian Journal of Animal Research

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Research Article

Indian Journal of Animal Research, volume 53 issue 11 (november 2019) : 1420-1424

Use of scrotal infrared thermography and ultrasonography to understand thermoregulation of testis and sperm quality in Karan Fries breeding bull

Manish Kumar Kushwaha, Mukesh Bhakat, T.K. Mohanty, Raj Kumar, Ranjana Sinha, Abdul Rahim, Pawan Singh, Kavita Khosla, Nadeem Shah, Ziaullah Danish
1Artificial Breeding Research Centre, ICAR-National Dairy Research Institute, Karnal-132 001, Haryana, India.
Cite article:- Kushwaha Kumar Manish, Bhakat Mukesh, Mohanty T.K., Kumar Raj, Sinha Ranjana, Rahim Abdul, Singh Pawan, Khosla Kavita, Shah Nadeem, Danish Ziaullah (2019). Use of scrotal infrared thermography and ultrasonography to understand thermoregulation of testis and sperm quality in Karan Fries breeding bull. Indian Journal of Animal Research. 53(11): 1420-1424. doi: 10.18805/ijar.B-3682.

ABSTRACT

The present investigation was carried out to study the effect of testicular covering thickness, scrotal circumference and scrotal surface temperature gradient insert semen quality attributes of Karan Fries breeding bull. Six ejaculates were collected from each randomly selected bulls (n=15), and seminal quality attributes were evaluated during peak winter season. Same time scrotal surface temperature gradient (SSTG), the thickness of testicular covering (TTC) and scrotal circumference (SC) of individual bulls were recorded using DarviDTL007 infrared thermography camera, ultrasonography and measuring tape, respectively. Three groups were formed based on  SSTG (Group I- £ 4 ºC, Group II- 4.1 to 6.8 ºC and Group III- ³6.9 ºC), two groups based on  TTC (Group I- 3.03 to 4.85 and Group II- 4.86 to 7.03 mm) and SC (Group I- 32 to 35 and Group II- 36 to 41 cm). Ejaculate rejection rate (ERR) was significantly decreased with the increase of SSTG and SC. ERR was not affected with TTC. The increase of SSTG (from GroupI to Group III), mass activity and non-eosinophilic sperm count were significantly increased, and sperm abnormalities were significantly (p<0.01) decreased. Similarly, with the increase of SSTG and abnormalities were significantly (p<0.01) increased among different groups. Ejaculate volume and non-eosinophilic sperm count were significantly (p<0.01) increased with SC group I and group II. It can be concluded that scrotal surface temperature gradient was a better indicator of semen quality as compared to the thickness of testicular covering and bulls having a higher scrotal surface temperature gradient, scrotal circumference and lower thickness of testicular covering produced better quality semen.

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