References
- Dyrmundsson , OR . 1973 . Puberty and early reproductive performance in sheep. 1. Ewe lambs . Animal Breeding Abstracts , 41 : 273 – 289 .
- Dyrmundsson , OR and Lees , JL . 1972 . Effect of rams on the onset of breeding activity in Clun-Forest ewe lambs . Journal of Agricultural Science, Cambridge , 79 : 269 – 271 .
- Edgar , DG and Bilkey , DA . 1963 . The influence of rams on the onset of the breeding season in ewes . Proceedings of the New Zealand Society of Animal Production , 23 : 78 – 87 .
- Kenyon , PR , Perkins , NR , Pinchbeck , GL , Morris , ST and West , DM . 2004 . Identifying factors which maximise the lambing performance of hoggets: a cross sectional study . New Zealand Veterinary Journal , 52 : 371 – 377 .
- Kenyon , PR , Morel , PCH , Morris , ST and West , DM . 2005 . The effect of individual liveweight and use of teaser rams prior to mating on the reproductive performance of ewe hoggets . New Zealand Veterinary Journal , 53 : 340 – 343 .
- Kenyon , PR , Morel , PCH , Morris , ST , Burnham , DL and West , DM . 2006 a . The effect of length of use of teaser rams prior to mating and individual liveweight on the reproductive performance of ewe hoggets . New Zealand Veterinary Journal , 54 : 91 – 95 .
- Kenyon , PR , Morel , PCH , West , DM and Morris , ST . 2006 b . Effect of liveweight and teasing of ewe hoggets prior to breeding on lambing pattern and weight of singleton lambs . New Zealand Journal of Agricultural Research , 49 : 341 – 347 .
- Kenyon , PR , Morel , PCH , Morris , ST and West , DM . 2007 . A note on the effect of vasectomised rams and short-term exposures to entire rams prior to the breeding period on the reproductive performance of ewe lambs . Applied Animal Behaviour Science , doi: doi:10.1016/j.applanim.2007.04.006
- Knight , TW . 1983 . Ram induced stimulation of ovarian and oestrous activity in anoestrous ewes - a review . Proceedings of the New Zealand Society of Animal Production , 43 : 7 – 11 .
- Murtagh , JJ , Gray , SJ , Lindsay , DR and Oldham , CM . 1984 . The influence of the ‘ram effect’ in 10-11-month-old Merino ewes on their subsequent performance when introduced to rams again at 15 months of age . Animal Production in Australia , 15 : 490 – 493 .
- Oldham , CM and Gray , SJ . 1984 . The ‘ram effect’ will advance puberty in 9-10-monthold Merino ewes independent of their season of birth . Animal Production in Australia , 15 : 727
- O'Riordan , EG and Hanrahan , JP . 1989 . Advancing first estrus in ewe lambs . Farm and Food Research , 20 : 25 – 27 .
- Rosa , HJD and Bryant , MJ . 2002 . The ‘ram effect’ as a way of modifying the reproductive activity in the ewe . Small Ruminant Research , 45 : 1 – 16 .
- Schinckel , PG . 1954 . The effect of the ram on the incidence and occurrence of oestrus in ewes . Australian Veterinary Journal , 30 : 189 – 195 .
- Smeaton , DC , Webby , RW and Sheath , GW . 1997 . Use of teaser ram effect to advance lambing date in a farm systems study . Proceedings of the New Zealand Society of Animal Production , 57 : 256 – 257 .