Productivity of Blackhead Persian sheep in Tanzania
Weight of lambs weaned (at 150 days) per ewe per year (Index D, per kg liveweight of ewe per year (Index II), per kg metabolic body weight (W0.73) of ewe per year (Index III), and per lifetime of ewe regardless of ewe weight (Index IV), were computed for 3022 ewes at Malya and West Kilimanjaro resea...
| Autores principales: | , , |
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| Formato: | Conference Paper |
| Lenguaje: | Inglés |
| Publicado: |
International Livestock Centre for Africa
1993
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| Acceso en línea: | https://hdl.handle.net/10568/5494 |
| _version_ | 1855515063918526464 |
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| author | Das, S.M. Rege, J.E.O. Shibre, M. |
| author_browse | Das, S.M. Rege, J.E.O. Shibre, M. |
| author_facet | Das, S.M. Rege, J.E.O. Shibre, M. |
| author_sort | Das, S.M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Weight of lambs weaned (at 150 days) per ewe per year (Index D, per kg liveweight of ewe per year (Index II), per kg metabolic body weight (W0.73) of ewe per year (Index III), and per lifetime of ewe regardless of ewe weight (Index IV), were computed for 3022 ewes at Malya and West Kilimanjaro research centres in Tanzania. The data analysed covered a period of 24 years (1965-1988). Least squares means for the four respective indices were 24.6 kg (SE 3.19), 675 g (SE 15.7) 1.8 kg (SE 0.04) and 63 kg (SE 1.6). Year, seasons and location significantly (at least P<0.05) affected all the indices except index IV which was not affected (P=0.59) by season. All indices showed a tendency to decline during most of the study period (1966 through 1981). Indices II and III exhibited a small recovery thereafter but this was not subsequently maintained. Dry season lambing was associated with the higher productivity indicated by index I (P<0.01) and index II (P=0.0). Productivity at Malya was consistently superior (P<0.01) to that at West Kilimanjaro, being 3 kg, 152 g, 0.45 kg and 7.2 kg better, respectively, for the four indices. Although Malya was superior to West Kilimanjaro in lamb weaning weight, a large proportion of the between-station differences in productivity indices was attributed to differential preweaning lamb mortality. |
| format | Conference Paper |
| id | CGSpace5494 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1993 |
| publishDateRange | 1993 |
| publishDateSort | 1993 |
| publisher | International Livestock Centre for Africa |
| publisherStr | International Livestock Centre for Africa |
| record_format | dspace |
| spelling | CGSpace54942023-02-15T13:11:00Z Productivity of Blackhead Persian sheep in Tanzania Das, S.M. Rege, J.E.O. Shibre, M. Weight of lambs weaned (at 150 days) per ewe per year (Index D, per kg liveweight of ewe per year (Index II), per kg metabolic body weight (W0.73) of ewe per year (Index III), and per lifetime of ewe regardless of ewe weight (Index IV), were computed for 3022 ewes at Malya and West Kilimanjaro research centres in Tanzania. The data analysed covered a period of 24 years (1965-1988). Least squares means for the four respective indices were 24.6 kg (SE 3.19), 675 g (SE 15.7) 1.8 kg (SE 0.04) and 63 kg (SE 1.6). Year, seasons and location significantly (at least P<0.05) affected all the indices except index IV which was not affected (P=0.59) by season. All indices showed a tendency to decline during most of the study period (1966 through 1981). Indices II and III exhibited a small recovery thereafter but this was not subsequently maintained. Dry season lambing was associated with the higher productivity indicated by index I (P<0.01) and index II (P=0.0). Productivity at Malya was consistently superior (P<0.01) to that at West Kilimanjaro, being 3 kg, 152 g, 0.45 kg and 7.2 kg better, respectively, for the four indices. Although Malya was superior to West Kilimanjaro in lamb weaning weight, a large proportion of the between-station differences in productivity indices was attributed to differential preweaning lamb mortality. 1993 2011-09-03T18:08:17Z 2011-09-03T18:08:17Z Conference Paper https://hdl.handle.net/10568/5494 en Open Access International Livestock Centre for Africa Das, S.M., Rege, J.E.O. and Shibre, M. 1993. Productivity of Blackhead Persian sheep in Tanzania. In: Lebbie, S.H.B., Rey, B. and Irungu, E.K. 1993. Small ruminant research and development in Africa: Proceedings of the Second Biennial Conference of the African Small Ruminant Research Network, AICC, Arusha, Tanzania, 7-11 December 1992. Addis Ababa, Ethiopia: ILCA and Wageningen, The Netherlands: CTA. |
| spellingShingle | Das, S.M. Rege, J.E.O. Shibre, M. Productivity of Blackhead Persian sheep in Tanzania |
| title | Productivity of Blackhead Persian sheep in Tanzania |
| title_full | Productivity of Blackhead Persian sheep in Tanzania |
| title_fullStr | Productivity of Blackhead Persian sheep in Tanzania |
| title_full_unstemmed | Productivity of Blackhead Persian sheep in Tanzania |
| title_short | Productivity of Blackhead Persian sheep in Tanzania |
| title_sort | productivity of blackhead persian sheep in tanzania |
| url | https://hdl.handle.net/10568/5494 |
| work_keys_str_mv | AT dassm productivityofblackheadpersiansheepintanzania AT regejeo productivityofblackheadpersiansheepintanzania AT shibrem productivityofblackheadpersiansheepintanzania |