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Semen Characteristics of Breeding Bulls at the Central Cattle Breeding and Dairy Farm of Bangladesh

ME Hossain
Department of Animal Science and Nutrition, Chittagong Veterinary and Animal Sciences University, Chittagong 4202, Bangladesh;

MM Khatun
Strengthening of Support Services for Combating Avian Influenza Project, District Livestock Office, Dhaka, Bangladesh;

MM Islam
Department of Animal Science and Nutrition, Chittagong Veterinary and Animal Sciences University, Chittagong 4202, Bangladesh;

OF Miazi
Department of Genetics and Animal Breeding, Chittagong Veterinary and Animal Sciences University, Chittagong 4202, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted on 97 breeding bulls at the central cattle breeding and dairy farm, Savar, Dhaka to find out the physical and chemical properties of different bull semen. Out of 97 bulls, 9 were Local (L), 9 were Friesian (F), 13 were Sahiwal (SL), 12 were Local×Friesian (L×F), 10 were Sahiwal×Friesian (SL×F), 26 were Local×Friesian×Friesian (LF1×F), 18 were Local×Friesian× Friesian×Friesian (LF2×F) bulls. The semen of different crossbred and local bulls was examined for ejaculate volume, concentration, pH and motility percent of sperm before and after freezing. It was observed that, the maximum average ejaculate was obtained from SL×F and the mean value was 12.9 ml. However, the minimum average ejaculate was obtained from LF×F and the mean value was 7.4 ml. Before freezing, the maximum average sperm concentration was obtained from SL and the mean value was 1858.4 million/ml. The minimum average sperm concentration was obtained from LF1×F and the mean value was 1286.6 million/ml. The maximum average pH was obtained from LF2×F and the mean value was 6.5. The maximum average motility was obtained from SL and the mean value was 68.8%. However, the minimum average motility was obtained from L×F and the mean value was 63.7%. After freezing, sperm concentration, pH and motility reduced substantially irrespective of type of breed. It could therefore be inferred that freezing of semen should be undertaken with special care to maintain optimum semen quality.

Keywords: Bull semen, Ejaculate volume, Sperm concentration, pH, Motility

Location: Central Cattle Breeding Station and Dairy Farm, Savar, Dhaka.

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Cattle

Objectives:

To observe the physical and chemical properties of different bull semen and to compare sperm motility with storage condition.

Methodology:

The experiment was carried out on 97 breeding bull at the Central Cattle Breeding Station and Dairy Farm, Savar, Dhaka. The farm was situated adjacent to the Dhaka Aricha highwayand 30 km northwest side from Dhaka city. The farm was surrounded by plain land with plenty of green vegetation. The highest and lowest ambient temperature of the experimental area was recorded as 37-380C and 15-210C, respectively. Average humidity was 76.6%.Among 254 breeding bulls of the AI section, 97 were selected according to quality and quantity of semen production. Out of 97 bulls, 9 were Local (L), 9 were Friesian (F), 13 were Sahiwal (SL), 12 were Local×Friesian (L×F), 10 were Sahiwal×Friesian (SL×F), 26 were Local× Friesian×Friesian (LF1×F), 18 were Local× Friesian×Friesian×Friesian (LF2×F) bulls. Bulls were given ad libitum green grass supplemented with concentrate mixture prepared with maizegrain, wheat bran, khesari, soybean meal and common saltThe semen was collected by artificial vagina (Arthur et al. 1982). Prior to collection of semen, all parts of artificial vagina (AV) set were cleaned, sterilized and assembled. The inner liner was put into the cylinder and both ends of inner liner were reflected over the cylinder forming water like space between them. The cone along with vial was slipped over one of the ends of the cylinder and then tightened with rubber band. Two third of the outer jacket of vagina was filled with warm water. The temperature inside the artificial vagina was 1100-1150F. An air screw was used for blowing air between two layers to create desired pressure. Required amount of lubricant was applied inside the artificial vagina with a glass rod. When the bull was sufficiently excited to jump over the dummy, the penis of the bull was directed into the artificial vagina by holding the sheath to collect the semen in a vial. After collection, the vial containing semen was put into hot water at 110⁰ F for preventing cold shock. It was closed with cotton and labeled (Almaquist et al. 1978).

Source of Information: Bang. J. Anim. Sci. 2012. 41 (1): 1-5

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Semen characteristics of 97 different types of breeding bulls at central cattle breeding and dairy farm, Savar, Dhaka have been discussed. It was evident that ejaculate volume,concentration, pH and motility of sperm were substantially influenced by freezing and the type of breed. Semen characteristics were better in Sahiwal followed by local and sahiwal Friesian crosses. It could therefore be summarized that, a certain part of the local cattle could be upgraded by pure Sahiwal and Friesian breeds.

Knowledge Management: Journal