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19832
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Subject: Animal Reproduction, Gynaecology and Obstetrics × End date: 1989 × Start date: 1983 × Type: Thesis ×
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    ThesisItemOpen Access
    Effect of frequency of ejaculation on semen characteristics and libido in cross-bred bucks
    (Department of Animal Reproduction, College of Veterinary and animal Sciences, Mannuthy, 1983) Metilda, Joseph; KAU; Prabhakaran, Nair K
    The objective of the study was to find out the optimum number of collections per day which can be taken from adult cross – bred bucks without adversely affecting their libido and semen quality. Ejaculation frequencies of once, twice and thrice daily for a continuous period of three months were adopted for the study. Epididymal sperm reserves and Daily Sperm Production were estimated to assess the sperm reserves of bucks. While colour, density, mass activity, concentration and MBR time were found to be influenced by ejaculation frequencies, volume, pH, percentage of dead sperms, percentage of abnormal sperms and sperm vialbility were unaffected. Frequency of ejaculation was not found to affect the libido of bucks. Bucks within group were found to influence all seminal attributes except mass activity, percentage of dead sperms and MBR time. Similarly all the seminal attributes with the exception of proximal and distal protoplasmic droplets were influenced by months within groups. A positive correlation between sperm viability at 46.50C for 30 minutes and preservation at 6 to 80C for 96 hrs.was observed. While in group II bucks only density, mass activity, pH, concentration and MBR time showed significant difference between ejaculates, in group 111, all seminal attributes except percentage of dead sperms were observed to be significantly different between ejaculates. The Daily Sperm Production per buck (X 109), per gram of testis (X 106), Daily Sperm Output (X 109) and dpididymal Sprem reserves (X 109) were respectively 3.7949 + 0.2032, 22.1974 + 0.3775, 1.2680 and 25.72 + 1.95. The average transit time of spermatozoa through epididymis was found to be 6.78 days. Increasing the frequency of collection from once daily to twice or thrice daily resulted in a significant drop in spermatozoan concentration, thus affecting seminal attributes such as colour, density, mass activity and MBR time. The very fact that other important seminal attributes such as volume, pH, motility, percentage of abnormal sperms, percentage of dead sperms, percentage of proximal and distal protoplasmic droplets and spermatozoan viability were unaffected, clearly points out that there is no deterioration of semen quality with increasing collection frequency. Similarly there was no deterioration in the sex libido and fertility of bucks even with three collections daily. However, there dose not seem to be any definite advantage in increasing collection frequency from 2 to 3 times daily, as the total harvest of sperms from group 11 and group 111 were almost same. But increasing the frequency of collection from one to two times daily has definite advantage, as it yields more spermatozoa for artificial insemination and hence is recommended for adoption.
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    ThesisItemOpen Access
    Effect of different dietary levels on the postpartum reproductive performance of cross-bred cows
    (Department of Animal Reproduction, College of Veterinary and animal Sciences, Mannuthy, 1983) Alexander, M I; KAU; Prabhakaran, Nair K
    The object of the present study was to asses the influence of higher dietary levels on the postpartum re productive performance of cross-bred cows. The meterials consisted of 30 crossbred cows in advanced stage of gestation. They were weighed on 270th day of gestation and on the day of calving and were randomly allotted to control, treatments 1st and 2nd . the control received ration based on Sen and Ray standard whereas, treatments 1 st and 2nd received 115 and 130 precent of control ration. The weight of the cows was recorded at 15 days interval from calving to oestrum.serum inorganic phosphorous, protein, glucose and haemoglobin percentage of 5 cows from each group was estimated. A decline of body weight wad observed in the first fortnight in all the three groups. This trend continued upto 30 days in the control whereas, in the treatment an increasing trend was observed from fifteenth day. Cows in all three groups showed postpartum oestrum, while there was in gain in body weight. The postpartum oestrous interval of control ,treatment 1st and treatment 2nd were 62.1+4.63, 56.60+5.53 and 53.22+3.75 days respectively and these values did not very significantly. However, postpartum oestrous interval of treatments 1st snd 2d was significantly less than that of the herd. Serum in organic phosphorous was significantly higher on the day of oestrum in control and treatment II. There was significant difference in serum protein values between groups at certain time intervals. It was also significantly more on the day of oestrum in both control and treatment I. Similarly blood glucose and haemoglobin were significantly higher on the day of oestrum in treatment I. Results of this study indicated that Sen and Ray ration is adequate to meet the requirement for both production and reproduction of cross- bred cows.