Theses and Dissertations Collection

Permanent URI for this collectionhttp://10.10.97.169:4000/handle/123456789/118

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Browsing Theses and Dissertations Collection by Author "Werema, C. W."

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    Productive and reproductive performance of Friesian cows at Kitulo livestock multiplication unit, Tanzania
    (Tanzania Veterinary Journal, 2015-02-12) Kashoma, I. P.; Mwingira, S. M.; Werema, C. W.; Kessy, B. M.
    Retrospective data were collected to assess reproductive and productive performance of Friesian dairy cows reared at Kitulo Livestock Multiplication Unit, Tanzania. Records of 314 cows within consecutive five productive periods; 2009 - 2014 were analyzed using Statistical Package for SocialScience (SPSS). The overall mean age at first calving (AFC), calving interval (CI), days open (DO), number of services per conception (NSPC), lactation length (LL) and total lactation milk yield (TLMY) were 1151.72±9.63 days, 404.57±1.54 days, 121.82±1.24 days,1.83±0.24, 306.54±5.53 days and 5,042.12±23.73 kg, respectively. CI differed significantly (P < 0.05) as it decreased with increasing parity but did not affect the TLMY. Number of services per conception positively correlated with DO and CI but negatively correlated with parity. Total lactation milk yield was significantly (P < 0.05) influenced by parity and lactation length, but TLMY had no significant (P > 0.05) effect on the average number of services per conception. It is concluded that reproductive and productive performance of Friesian dairy cows in the present study were low to moderate so it is required to improve management practices at the farm for better reproductive and productive performance.
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    Surgical sterilization of the African Giant Pouched Rats
    (Tanzania Veterinary Journal, 2015-08-25) Werema, C. W.; Samson, R.; Ndossi, D. G.; Kashoma, I. P.; Mwakijungu, E.
    Surgical sterilization of rodents is increasing as a result of increased biomedical research centers which employ rodents. In order for them to perform their duties effectively, the rodents have to be sterile to avoid interference from estrus, pregnancy and lactation. Other reasons include control of breeding, treatment of diseases or conditions such as tumors cysts, pyometra, pyometritis, and endometritis. In this study three surgical procedures were performed to African Giant Pouched Rats; 6 females were ovariectomized, 6 females were ovariohysterectomized, and 6 males were Orchidectomized. All eighteen (18) animals in the study recovered well and have returned to APOPO to continue with the training on smelling and detecting landmines and tuberculosis in human sputum samples without any difficulties. Complications from these surgical procedures are rare but comprise anesthetic overdose, dehydration, hypothermia, pulmonary hypostatic congestion, hemorrhage, eviscerations, wound dehiscence, and infections. However, many of these complications can be prevented by careful physical examination and selection of health animals fit for the intended surgical procedure, as well as adherence to all principles of surgery. This study has demonstrated the three surgical procedures for African Giant pouched rats as being useful to veterinarians in public/private practice and/or in biomedical research facilities.