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New Zealand Veterinary Journal Volume 55, 2007 - Issue 6
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Short Communication

Effect of the ratio of teaser rams used prior to breeding on the reproductive performance of ewe hoggets

PR Kenyon Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
,
PCH Morel Institute of Food, Nutrition and Human Health, Massey University, Palmerston North, New Zealand
,
ST Morris Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
,
DL Burnham Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
&
DM West Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
Pages 342-345 | Received 04 May 2007, Accepted 27 Jul 2007, Published online: 18 Feb 2011

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 .

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