References
- Drymundsson , OR . 1973 . Puberty and early reproductive performance in sheep. 1. Ewe lambs . Animal Breeding Abstracts , 41 : 273 – 289 .
- Drymundsson , 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 .
- 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 .
- Jainudeen , MR , Wahid , H and Hafez , ESE . 2000 . “ Sheep and goats ” . In Reproduction in Farm Animals , 7th Edtn , Edited by: Hafez , ESE and Hafez , B . 172 – 181 . Baltimore, , USA : Lippincott Willams and Wilkins .
- 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 .
- 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 .
- Knight , TW , Oldham , CM , Lindsay , DR and Smith , JF . 1975 . Variation in the fertility of ewes during the joining period and its modification by prior contact with rams . Australian Journal of Agricultural Research , 26 : 577 – 583 .
- McMillan , WH and Moore , RW . 1983 . Capitalizing on hogget oestrus . Proceedings of the 13th Seminar the Society of Sheep and Beef Cattle Veterinarians of the New Zealand Veterinary Association , 13 : 47 – 52 .
- Meyer , HH and French , RL . 1979 . Hogget liveweight-oestrous relationship among sheep breeds . Proceedings of the New Zealand Society of Animal Production , 39 : 56 – 62 .
- O'riordan , EG and Hanrahan , J P . 1989 . Advancing first estrus in ewe lambs . Farm and Food Research , 20 : 25 – 27 .
- Schinckel , PG . 1954 . The effect of the ram on the incidence and occurrence of oestrus in ewes . Australian Veterinary Journal , 30 : 189 – 195 .
- Smith , J F and Knight , TW . 1998 . “ Reproductive management of sheep ” . In Reproductive Management of Grazing Ruminants in New Zealand , Edited by: Fielden , ED and Smith , JF . 113 – 143 . Hamilton, , New Zealand : New Zealand Society of Animal Production .