caa a22 4500 469127317 CHVBK 20180323133154.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF02359616 doi (NATIONALLICENCE)springer-10.1007/BF02359616 Reproduction in female cattle in a communal farming area of Zimbabwe [Elektronische Daten] [N. Honhold, F. Hill, D. Knottenbelt, B. Perry, D. Morton] Summary: Cattle in a communal farming area of Zimbabwe were identified and examined in the late dry and mid wet season of 1985/86. Ovarian activity rates were 17·9% and 38·6% in the dry and wet season respectively. Pregnancy rates were 16·1% and 24·6% respectively. A major limitation to reproduction was the percentage of anoestrous females. There was no evidence of a seasonal calving pattern. Median body condition score was 2·0 in the dry season and 1·5 in the wet season. Adult females of body condition score 2·5 and above had ovarian activity rates of 41·9% and pregnancy rates of 41·9 per cent. Those with a body condition score below 2·5 had rates of 26·8% and 16·4% respectively. Serum progesterone levels in pregnant animals were positively related to body condition score, with some animals having progesterone levels similar to non-pregnant animals. Metabolic profiles suggested that the major limiting nutrient in both seasons was nitrogen, although other micronutrients might also be involved in low reproductive rates. Centre for Tropical Veterinary Medicine, University of Edinburgh, 1992 Honhold N. Facultad de Medicina, Universidad Autonoma de Yucata, Merida, Apdo Postal 4-116, Yucatan, Mexico aut Hill F. Faculty of Veterinary Science, University of Zimbabwe, Harare, Zimbabwe aut Knottenbelt D. Division of Equine Studies, Department of Veterinary Clinical Science, University of Liverpool, Leahurst, Neston, Wirral, Merseyside, England aut Perry B. ILRAD, PO Box 30709, Nairobi, Kenya aut Morton D. Department of Pharmacy, University of Zimbabwe, Harare, Zimbabwe aut Tropical Animal Health and Production Kluwer Academic Publishers 24/3(1992-09-01), 183-191 0049-4747 24:3<183 1992 24 11250 https://doi.org/10.1007/BF02359616 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02359616 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Honhold N. Facultad de Medicina, Universidad Autonoma de Yucata, Merida, Apdo Postal 4-116, Yucatan, Mexico aut NATIONALLICENCE 700 1- Hill F. Faculty of Veterinary Science, University of Zimbabwe, Harare, Zimbabwe aut NATIONALLICENCE 700 1- Knottenbelt D. Division of Equine Studies, Department of Veterinary Clinical Science, University of Liverpool, Leahurst, Neston, Wirral, Merseyside, England aut NATIONALLICENCE 700 1- Perry B. ILRAD, PO Box 30709, Nairobi, Kenya aut NATIONALLICENCE 700 1- Morton D. Department of Pharmacy, University of Zimbabwe, Harare, Zimbabwe aut NATIONALLICENCE 773 0- Tropical Animal Health and Production Kluwer Academic Publishers 24/3(1992-09-01), 183-191 0049-4747 24:3<183 1992 24 11250 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer