95
Views
4
CrossRef citations to date
0
Altmetric
Short Communication

Can Romney ram lambs whose scrotums had been shortened by the use of a rubber ring be used as an alternative to vasectomised Perendale rams for inducing early breeding activity in Romney ewe lambs?

, &
Pages 326-329 | Received 27 Nov 2007, Accepted 02 Sep 2008, Published online: 18 Feb 2011

References

  • Cohen-Tannoudji , J , Locatelli , A and Signoret , JP . 1986 . Non-pheromonal stimulation by the male of LH release in the anoestrous ewe . Physiology and Behaviour , 36 : 921 – 924 .
  • Dyrmundsson , OR . 1987 . “ Advancement of puberty in male and female sheep ” . In New Techniques in Sheep Production , Edited by: Fayez , I , Marai , M and Owen , JB . 65 – 76 . London, , UK : Butterworths & Co . In
  • Dyrmundsson , OR and Lees , JL . 1973 . Effect of rams on the onset of breeding activity in Clun-Forest ewe lambs . Journal of Agricultural Science , 79 : 269 – 271 .
  • Gelez , H and Fabre-Nys , C . 2004 . The “male effect” in sheep and goats: a review of respective roles of the two olfactory systems . Hormones and Behaviour , 46 : 257 – 271 .
  • Johnson , PL , Kenyon , PR , Burnham , DL and West , DM . 2007 . To wether — short scrotum or leave lambs as entire rams? Revisiting an old question using new genetics . Proceedings of the New Zealand Society of Animal Production , 67 : 44 – 47 .
  • 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 . Effect of the age of rams on reproductive performance of ewe hoggets . New Zealand Veterinary Journal , 55 : 184 – 187 .
  • Kenyon , PR , Morel , PCH , Morris , ST , Burnham , DL and West , DM . 2007 b . Effect of the ratio of teaser rams used prior to breeding on the reproductive performance of ewe hoggets . New Zealand Veterinary Journal , 55 : 342 – 345 .
  • Kenyon , PR , Morel , PCH , Morris , ST and West , DM . 2007 c . A note on the effect of vasectomised rams and short-term exposure to entire rams prior to the breeding period on the reproductive performance of ewe lambs . Animal Behaviour Science , 110 : 397 – 403 .
  • Khalil, , IA , El-Sayed , AI , Abdel-Ghafer , AE and Mousa , ME . 1995 . Plasma testosterone level and histology of testes and epididymes of Ossimi male lambs in relation to age . Annals of Agricultural Science , 33 : 1237 – 1250 .
  • Knight , TW . 1983 . Ram-induced stimulation of ovarian and oestrus activity in anoestrous ewes — a review . Proceedings of the New Zealand Society of Animal Production , 43 : 7 – 11 .
  • Lee , VWK , Cumming , IA , Kretser , DM , de Findlay , JK , Hudson , B and Keogh , EJ . 1975 . Patterns of LH, FSH and testosterone levels in the developing ram . Journal of Reproduction and Fertility , 43 : 378 – 379 .
  • Martin , GB , Rodger , J and Blanche , D . 2004 . Nutritional and environmental effects on reproduction in small ruminants . Reproduction, Fertility and Development , 16 : 491 – 501 .
  • Mellor , DJ and Stafford , KJ . 2000 . Acute castration and/or tailing distress and its alleviation in lambs . New Zealand Veterinary Journal , 48 : 33 – 43 .
  • Probert , AD and Davies , AS . 1986 . A study of short scrotum, castrated and entire ram lambs . Proceedings of the New Zealand Society of Animal Production , 46 : 55 – 58 .
  • Sanford , LM , Palmer , WM and Howland , BE . 1982 . The influence of age and breed on circulating LH, FSH and testosterone levels in the ram . Canadian Journal of Animal Science , 62 : 767 – 776 .
  • Schanbacher , BD and Ford , JJ . 1976 . Luteinizing hormone, testosterone, growth and carcass responses to sexual alteration in the ram . Journal of Animal Science , 43 : 638 – 643 .
  • Tierney , LA and Hallford , DM . 1985 . Mating behaviour, serum testosterone and semen characteristics in vasectomised and short scrotum rams . Theriogenology , 23 : 535 – 545 .
  • Ungerfeld , R , Forsberg , M and Rubianes , E . 2004 . Overview of the response of anoestrous ewes to the ram effect . Reproduction, Fertility and Development , 16 : 479 – 490 .
  • Wellington , GH , Hogue , DE and Foote , RH . 2003 . Growth, carcass characteristics and androgen concentrations of gonad-altered ram lambs . Small Ruminant Research , 48 : 51 – 59 .

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.