@conference {40847,
	title = {Effect of lamb shearing on fine wool Merino hogget performance},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {56},
	year = {1996},
	month = {Jan},
	pages = {328-331},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The effect on hogget productivity and wool processing performance of  shearing Merinos for the first time as lambs was investigated. A flock of 200  fine wool Merino lambs were randomly separated into two lines. One line  was shorn as lambs in late summer and both lines were shorn the following  spring as hoggets. There were no differences in live weight at hogget  shearing or in flystrike incidence and internal parasite levels. Total wool  production was greater from the twice shorn hoggets compared to those  shorn only once, with the hoggets shorn twice producing about 0.4 kg more  wool. However the differences in hogget wool quality, processing and  product performance when lamb wool was removed and the extra wool  production did not cover the discounted wool values due to shorter wool  staple length and the extra costs of shearing. At current price relativities  justification for first shearing Merinos as lambs must relate to management  advantages pertaining to individual properties. },
	issn = {1176-5283},
	author = {Newman S-AN and Maddever DC and Sumner RMW}
}
@conference {40589,
	title = {The processing of different staple strength wools},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {54},
	year = {1994},
	month = {Jan},
	pages = {159-162},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Wool from lines of Romney sheep selected for high and low staple  
strength and a randomly selected control line were processed into worsted yarn  
for handknitting (ewe hogget fleeces) and semi-worsted yarn for carpets (adult  
ewe fleeces).  Separate lots of wool were created for each line with the fleeces  
chosen to ensure that the lots had similar mean fibre diameter, staple length 
and medullation.  Hogget wool yarns were knitted into panels and the adult ewe  
wool yarns were tufted into carpet. 
 
In the hogget wool processing trial, increased staple strength was associated  
with greater mean length after carding and higher combing yields, with small  
improvements in yarn tenacity and in knitted panel abrasion and pilling test  
results. 
 
The adult ewe wool processing trial also produced a significant difference in  
length after carding.  At high spindle speeds the high strength line performed  
better in spinning, producing fewer "end-breaks". 
 
The trials indicate there are real advantages for worsted and semi-worsted  
processing and product performance, warranting premiums for high strength  
wools. 
 },
	issn = {1176-5283},
	author = {Maddever DC and Scobie D and Bray A}
}
@conference {40515,
	title = {Textile Evaluation of Texel Wools},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {53},
	year = {1993},
	month = {Jan},
	pages = {311-314},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Evidence for multiple anthelmintic resistance has emerged rapidly. The need to investigate innovative alternatives to maximise nematode control is significantly more critical. Selection of sheep with above average natural or acquired resistance to infection is one such option that is being studied. Progeny testing for faecal nematode egg count (FEC) has been evaluated following natural infection. Research involving 104 sires used on 4 commercial Romney studies over the last 2-5 years demonstrated considerable genetic variation. Heritability estimates for FEC ranged from 0.17 to 0.27.  Moderate to strong positive genetic correlations (0.38-0.75) between FEC1 and FEC2 were observed. Furthermore, genetic correlations between FEC1 or FEC2 and production traits, including weaning weight, later liveweights and fleece weight were moderate. Breeders face a philosophical dilemma whether to become involved in selection for nematode resistance or not in the face of the many unanswered questions, including why and how to undertake the work. Results to date indicate that breeders can adopt and apply a screening protocol to add to breeding trait records.},
	issn = {1176-5283},
	author = {Maddever DC and Wuliji T}
}
@conference {40339,
	title = {Effect of selecting Perendale hoggets for loose wool bulk on fleece characteristics and wool end-product performance},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {51},
	year = {1991},
	month = {Jan},
	pages = {347-352},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Hoggets from the Massey University fleeceweight-selected (FW)  line were previously shown to have lower sulphur (S) concentrations in  midside wool than control (C) hoggets at 14 months of age. This study  involved two experiments. The first examined wool S concentrations at  different body positions in 14-month hoggets and the second examined  midside wool S concentration and blood parameters in young lambs. In  Experiment 1, 16 FW hoggets and 16 C hoggets were wool sampled at 11  positions over the body. The wool S concentration of FW hoggets was  found to be significantly (P<0.01) lower than that of C hoggets (2.77\%  vs 2.94\%). Discriminant analysis was used to classify hoggets to their  respective lines based on wool S measurements. The combination of sites  which most correctly classified the hoggets was the midside plus base of  the tail. In the Experiment 2, 40 FW and 40 C lambs were wool sampled  on the midside at 28 day intervals from 21 November (1 week before  weaning) to 13 February. FW lambs had significantly (P<0.05) lower  midside wool S concentrations of urea, but not of creatinine, than C  lambs. Results suggest that wool S concentration and plasma urea  concentrations may be useful genetic markers for high fleece production  but that the ability to discriminate between animals of high versus low  genetic merit for fleece weight on the basis of wool S will depend on  the sampling position and age of animals.  },
	issn = {1176-5283},
	author = {Sumner RMW and Maddever DC and Clarke JN}
}
@conference {40337,
	title = {Relative economic values of wool processing parameters},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {51},
	year = {1991},
	month = {Jan},
	pages = {333-338},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Seasonal wool growth pattern and fleece characteristics of  Doreset x Romney ewes lambing in either autumn or spring and rearing 0,  1 or 2 lambs were measured over 2 years. The ewes were shorn twice-  yearly in March and October.   Season of lambing influenced the seasonal pattern of wool growth.  Autumn lambing ewes did not show as marked a seasonal decline in wool  growth during the winter. March shorn fleeces were coarser (2.5 um),  stronger (20 N/ktex), and yellower (1.1 Y-Z units) than October shorn  fleeces of October shorn spring lambing ewes. On the basis of price  trends over the last 5 years, net wool returns from autumn lambing ewes  would exceed those from spring lambing ewes by approximately  80c/ewe/year.  },
	issn = {1176-5283},
	author = {Maddever DC and Carnaby GA and Ross DA}
}
