@conference {41746,
	title = {Effects of experimentally induced and treated Streptococcus uberis mastitis early in the dry period on production in the subsequent lactation},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {67},
	year = {2007},
	month = {Jan},
	pages = {303-306},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Wanaka},
	abstract = {The effect of experimentally induced clinical mastitis in the early dry period (EDPCM) upon the milk production in the subsequent lactation was examined. Animals with low somatic cell counts at herd test (n=165) were experimentally exposed to Streptococcus uberis in their early dry period in an efficacy study of two external teat sealants. Animals that developed EDPCM after challenge (n=127) were treated with an antibiotic after observation of clinical mastitis. Total lactation yields of milk, fat, protein and milk solids were analysed with respect to treatment group (fixed effect) and the covariables: calving week (linear), parity (linear and quadratic) and proportion of Holstein-Friesian genes (linear). For animals that suffered EDPCM and those that did not, there was no difference in production (milk yield; 5126 vs. 5010 litres, fat yield; 267 vs. 264 kg, protein yield; 182 vs. 179 kg). It was concluded that promptly treated EDPCM due to S uberis, did not affect production in the subsequent lactation.},
	issn = {1176-5283},
	author = {Petrovski KR and Williamson NB and Fernandez C and Grinberg A and Lopez-Villalobos N and Parkinson TJ}
}
@conference {40722,
	title = {The effect of stocking rate and breed on the period of postpartum anoestrum in grazing dairy cattle},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {55},
	year = {1995},
	month = {Jan},
	pages = {236-238},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The effects of stocking rate (low, L; and high, H), breed (Jersey, J; and  Friesian, F) and age (2, 3, >3 years old) on the intervals from calving to first  ovulation and to first oestrus were assessed in pasture grazed dairy cattle  using a 2 x 2 design. Cows in the FH herd had longer intervals from calving  to first postpartum ovulation (C-ovn1; 49.2 vs 24.7, 31.1 and 29.4 days) and  C-hl (47.1 vs 32.5 days) intervals than older cows, with 3 year old cows  intermediate. The high stocking rate herds had reduced CS, liveweight and  milk production compared to the low stocking rate herds. Condition score  and milksolids production were inversely related to the C-ovnl and/or C-hl  intervals. Increased stocking rates were associated with longer periods of  postpartum anoestrum.  },
	issn = {1176-5283},
	author = {McDougall S and Burke CR and Williamson NB and Macmillan KL}
}
@conference {40572,
	title = {Some effects of feeding pasture silage as a supplement to pasture on reproductive performance in lactating dairy cows},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {54},
	year = {1994},
	month = {Jan},
	pages = {95-98},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Supplementation of a ryegrass/white clover pasture diet with pasture  
silage is a common management practice in New Zealand dairy herds.  The  
effect of this supplementation during early lactation on reproductive  
performance has not been investigated.  Five herds of 20 cows were formed  
before calving commenced on June 1 1992.  From August 5 to September 4,  
two of these herds were fed 5 kg dry matter/cow/day of pasture silage in  
addition to the ryegrass/white clover pasture offered to all herds.  Pasture  
silage supplementation did not alter the intervals from calving to first  
ovulation, first oestrus, or to conception.  However, it reduced the first  
service conception rate(37.5\% vs 53.3\%; (sed = {\textpm} 10.0\%), for pasture and  
silage and pasture only cows; respectively). 
 
A positive effect on reproductive performance of pasture silage  
supplementation was not demonstrated in this trial},
	issn = {1176-5283},
	author = {McDougall S and Clark DA and Macmillan KL and Williamson NB}
}
@conference {40465,
	title = {A case control study of anoestrum in New Zealand dairy cows},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {53},
	year = {1993},
	month = {Jan},
	pages = {101-104},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Clumps of mammary secretory epithelial cells were isolated from a lactating sheep udder and their mammary function in vitro was evaluated.  Initially, the cells synthesized and secreted significant amounts of casein, },
	issn = {1176-5283},
	author = {McDougall S and Leijnse P and Day AM and Macmillan KL and Williamson NB}
}
@conference {40402,
	title = {The effect of pretreatment with progesterone on the oestrous response to oestradiol-17Beta benzoate in the post-partum dairy cow},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {52},
	year = {1992},
	month = {Jan},
	pages = {157-160},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Crossbreeding with Booroola Merino rams was initiated in 1986 in  Israel to transfer the FecB allele to the Awassi (Aw) and the Assaf (As)  dairy breeds to increase their prolificacy. The prolificacy of the F1  ewes was higher by about 0.6 lambs/ewe lambing (P<0.05) over the  prolificacy of Aw and As ewes. Growth rate up to 150 days of age did not  differ between As, },
	issn = {1176-5283},
	author = {McDougall S and Burke CR and Macmillan KL and Williamson NB}
}
