Scrotal Circumference at Puberty and its Relationship to Testes Mass in Three Genotypes of Beef Cattle
| Data(s) |
2000
|
|---|---|
| Resumo |
Scrotal circumference (SC) is a simple, non-invasive measurement commonly used to evaluate bull breeding potential although its validity as a predictor of fertility is questionable (Holroyd, 1998). SC is highly heritable but varies with breed and animal factors such as condition, live weight and age. As an indicator of fertility, recommended SC values range broadly from 30cm to 38cm (Miller, 1992). It is assumed that SC accurately reflects testes mass (TM) which may be related to direct measures of fertility such as spermatogenesis (Entwistle, 1992). The SC measurements made here test the assumption that SC, used to estimate testes volume (TV), is directly related to TM. Miller (1992) reported a value of 261mm as the SC threshold for puberty. We have studied serial SC measurements so as to devise a more accurate means of using SC to determine puberty. |
| Formato |
application/pdf |
| Identificador |
Gazzola, C. and Hill, R.A. and Jeffery, M.R. and O’Neill, C.J. and Reid, D.A. and White, D.H. and Burns, B.M. (2000) Scrotal Circumference at Puberty and its Relationship to Testes Mass in Three Genotypes of Beef Cattle. In: Animal Production for a Consuming World. AAAP-ASAP Conference, 2nd - 7th July, Sydney, Australia. |
| Publicador |
AAAP and ASAP |
| Relação |
http://era.daf.qld.gov.au/583/2/GazzolaScrotal-SEC.pdf http://era.daf.qld.gov.au/583/ |
| Palavras-Chave | #Breeding and breeds #Cattle |
| Tipo |
Conference or Workshop Item PeerReviewed |
