Productivity of Boran cattle and their Friesian crosses at Abernossa ranch, rift valley of Ethiopia. I. Reproductive performance and pre-weaning mortality

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cg.coverage.countryEthiopia
cg.coverage.iso3166-alpha2ET
cg.coverage.regionAfrica
cg.coverage.regionEastern Africa
cg.identifier.doihttps://doi.org/10.1007/bf02250878en
cg.isijournalISI Journalen
cg.issn0049-4747en
cg.issn1573-7438en
cg.issue4en
cg.journalTropical Animal Health and Productionen
cg.species.breedBORANen
cg.subject.ilriANIMAL BREEDINGen
cg.subject.ilriCATTLEen
cg.volume25en
dc.contributor.authorHaile-Mariam, M.en
dc.contributor.authorBanjaw, K.en
dc.contributor.authorGebre-Meskel, T.en
dc.contributor.authorKetema, H.en
dc.date.accessioned2015-06-05T12:17:58Zen
dc.date.available2015-06-05T12:17:58Zen
dc.identifier.urihttps://hdl.handle.net/10568/66843
dc.titleProductivity of Boran cattle and their Friesian crosses at Abernossa ranch, rift valley of Ethiopia. I. Reproductive performance and pre-weaning mortalityen
dcterms.abstractData collected on number of services per conception (NSC), age at first calving, (AFC), calving interval and calf pre-weaning mortality rate of Boran cattle and their Friesian crosses were evaluated. The NSC was 1.81, 1.61 and 1.69 for Boran, F1 Boran-Friesian and three-quarter Friesian heifers respectively. The AFC varied from 31.5 month in the F1 crosses to 46.8 months in the Boran heifers artificially inseminated with Friesian semen. The mean calving intervals were 465, 552, 525 and 487 days for Boran cows naturally mated to Boran and Friesian bulls, Boran and F1 cows artificially inseminated with Friesian semen, respectively. The pre-weaning calf mortality rate was 3.4% and was significantly influenced by parity, sex and interaction of breed with year of birth. Year as well as season had in general significant effects on the traits considered. However, the variation between mating or breeding groups was also large and it was in favor of the F1 crosses.en
dcterms.accessRightsLimited Access
dcterms.bibliographicCitationHaile-Mariam, M., Banjaw, K, Gebre-Meskel, T and Ketema, H. 1993. Productivity of Boran cattle and their Friesian crosses at Abernossa ranch, rift valley of Ethiopia. I. Reproductive performance and pre-weaning mortality. Tropical Animal Health and Production 25: 239-248.en
dcterms.extentp. 239-248en
dcterms.issued1993-12
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherSpringeren
dcterms.subjectreproductionen
dcterms.subjectcattleen
dcterms.subjectmortalityen
dcterms.subjectproductivityen
dcterms.subjectcrossbredsen
dcterms.typeJournal Article

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