Influence of arrival weight, season and calf supplier on survival in Holstein beef calves on a calf ranch in California, USA
| Autor: | William M. Sischo, Charles A. Holmberg, David M Festa, E. Robert Atwill, James P. Reynolds, Dale A. Moore |
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| Rok vydání: | 2002 |
| Předmět: |
Male
Veterinary medicine Birth weight Body Weight Cattle Diseases Biology Animal husbandry Body weight Survival Analysis California Animal science Animals Newborn Food Animals Risk Factors parasitic diseases Animals Colostrum Cattle Animal Science and Zoology Calf mortality Seasons Animal Husbandry Management practices |
| Zdroj: | Preventive Veterinary Medicine. 53:103-115 |
| ISSN: | 0167-5877 |
| Popis: | On a yearly basis, large calf ranches rear thousands of neonatal cattle for replacement heifers, veal or dairy beef. Dairy beef ranches obtain bull-calves from multiple sources and with questionable colostrum intake histories. Such ranches accumulate large amounts of data that could be used to help them with calf purchasing and on-farm management practices to avoid losses. Our purpose was to describe some calf purchase factors associated with mortality in neonatal calves raised on a single large calf ranch. Computerized records describing 120,197 bull-calves purchased between January 1997 and November 1998 were used in a survival analysis. Risk factors for mortality within the first 4 weeks after arrival on the ranch included body weight on arrival, month of arrival, and the calf supplier. The strength of the effects was conditional on the week after arrival to the ranch. |
| Databáze: | OpenAIRE |
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