Dairy Sheep Symposium - the Department of Animal Sciences ...
Dairy Sheep Symposium - the Department of Animal Sciences ... Dairy Sheep Symposium - the Department of Animal Sciences ...
longer, but the sale of young male lambs allows the shepherds to start milking the flock relatively early in lactation. In Australia the traditional lamb consumed is the prime lamb (once called fat lamb), a 20-30 kg beast that has been weaned by its mother and has eaten grass. By the time a prime lamb is ready for market its mother has stopped lactating and would be of no use for milking. Therefore, our research effort concentrated on investigating economically viable methods to wean the lambs and markets for milk-fed lambs. Dairy potential of Awassi sheep Our research has shown that first cross Awassi x Merino sheep produce more milk than local Merino sheep (Figure 1). Milk yield (g/day) 800 600 400 200 0 800 600 400 200 0 0 1 2 Merino 3 4 Merino 5 6 7 8 Milked from week 1 Milked from week 4 Awassi x Merino Awassi x Merino 9 10 11 12 13 14 15 16 17 18 19 20 21 Week Figure 1. Lactation curves of Awassi x Merino (n=45) and Merino (n=22) ewes milked immediately after lambing (AxM, n=22; M, n=6) or after four weeks of nursing their own lambs (AxM, n= 23; M, n=16).
Heterosis did not seem to intervene on the milk production of the sheep and the production of Awassi x Merino ewes was intermediate between those of the two parent breeds. For this reason we also compared the production of milk from higher Awassi crosses (Table 1). Table 1. Daily milk production (g/day), total lactation yield (kg) and total lactation length (weeks) of Awassi crossbred ewes. Cross (n) Daily production Lactation yield Lactation length 1/2 (16) 383±26.0 33.4±7.83 21±2.1 3/4 (13) 515±42.9 45.0±12.87 21±2.6 7/8 (11) 557±38.7 50.3±16.06 22±3.4 15/16 (7) 606±56.5 65.3±16.17 25±3.5 Although back-crossing to the Awassi increased milk production, it appears that the years spent in Cyprus under harsh conditions as well as the seven years spent in quarantine in Australia were sufficient to undo all the genetic improvement achieved by the Israeli on the Awassi sheep. After these first experiments we have milked a lot more sheep and the results are still showing that the Awassi that was imported in Western Australia is not capable of the 1000 litres of milk per lactation quoted by Epstein (1982). Anecdotal evidence suggests that the Awassi sheep imported to new South Wales produce more milk that the Western Australian Awassi, but the results are still unpublished. Within each flock we have observed exceptional individuals producing large quantities of milk. Therefore it is possible to recommence selection for dairy production. Currently we are milking East Friesian x Awassi and East Friesian x Merino ewes. Preliminary results indicate that the East Friesian x Awassi ewes produce more milk than Awassi ewes, while the East Friesian x Merino ewes produce less milk than Awassi ewes (Table 2). Table 2. Milk production (g/day) on 20 September 2001, of Awassi, Awassi x Merino, East Friesian x Awassi, East Friesian x Merino Breed (n) Daily production Standard Error Awassi (18) 745 112.0 Awassi x Merino (5) 483 80.1 East Friesian x Awassi (9) 1222 184.9 East Friesian x Merino (15) 525 67.3 Merino (19) 386 55.2
- Page 132 and 133: References Barillet, F., and F. Boc
- Page 134 and 135: Table 1. Least squares means ± SEM
- Page 136 and 137: Table 3. Simulation of parlor throu
- Page 138 and 139: EFFECT OF REDUCING THE FREQUENCY OF
- Page 140 and 141: Individual ewe milk production (mor
- Page 142 and 143: dimanche soir sur les brebis de rac
- Page 144 and 145: A B A Morning milk yield, kg B Adj.
- Page 146 and 147: Background and History: Most sheep
- Page 148 and 149: Percent 100 80 60 40 20 0 87 Effect
- Page 150 and 151: Fall Lambing Percentage 100 90 80 7
- Page 152 and 153: THE EFFECT OF GROWTH RATE ON MAMMAR
- Page 154 and 155: After puberty, the mammary gland re
- Page 156 and 157: Many trials have examined the mamma
- Page 158 and 159: From these results the authors conc
- Page 160 and 161: Onset of Puberty and Reproductive P
- Page 162 and 163: Similarly, calves, heifers, and cow
- Page 164 and 165: McCann, M. A., Goode, L., Harvey, R
- Page 166 and 167: DISCUSSION Stability of Frozen Raw
- Page 168 and 169: analyzed for titratable acidity, sy
- Page 170: 411-416. Wendorff, W.L. 1998. Updat
- Page 175 and 176: Recent Outbreaks involving Cheddar
- Page 177 and 178: testing on raw milk at the farm. Th
- Page 179 and 180: THE AUSTRALIAN SHEEP DAIRY INDUSTRY
- Page 181: The University of Western Australia
- Page 185 and 186: Lambs The problem of weaning lambs
- Page 187 and 188: GROUP BREEDING SCHEME: A FEASIBLE S
- Page 189 and 190: Where: h = square root of heritabil
- Page 191 and 192: Second step. All members enroll in
- Page 193 and 194: The structure and movement of anima
- Page 195 and 196: CAN THE OVARY INFLUENCE MILK PRODUC
- Page 197 and 198: dividing the amount of milk obtaine
- Page 199 and 200: the CL there were significant diffe
- Page 201 and 202: etween milkings. Finally, this woul
- Page 203 and 204: Table 1. Least squares means ± SEM
- Page 205 and 206: A Daily milk yield (kg) A B Milk fl
- Page 207 and 208: Progesterone (ng/ml) 8 6 4 2 0 CLY:
- Page 209 and 210: milk volume within the cistern (Mar
- Page 211 and 212: Results Treatment milk yield increa
- Page 213 and 214: Reports in dairy cattle concerning
- Page 215 and 216: Muir, D.D., D.S. Horne, A.J.R. Law,
- Page 217 and 218: Milk yield (kg) 1.4 1.2 1.0 0.8 0.6
- Page 219 and 220: A Milk protein (%) A A Milk protein
- Page 221 and 222: TAPPE FARM TOUR Jon & Kris Tappe, T
- Page 223: a little special attention every da
longer, but <strong>the</strong> sale <strong>of</strong> young male lambs allows <strong>the</strong> shepherds to start milking <strong>the</strong> flock relatively<br />
early in lactation. In Australia <strong>the</strong> traditional lamb consumed is <strong>the</strong> prime lamb (once called fat<br />
lamb), a 20-30 kg beast that has been weaned by its mo<strong>the</strong>r and has eaten grass. By <strong>the</strong> time a<br />
prime lamb is ready for market its mo<strong>the</strong>r has stopped lactating and would be <strong>of</strong> no use for<br />
milking.<br />
Therefore, our research effort concentrated on investigating economically viable methods to<br />
wean <strong>the</strong> lambs and markets for milk-fed lambs.<br />
<strong>Dairy</strong> potential <strong>of</strong> Awassi sheep<br />
Our research has shown that first cross Awassi x Merino sheep produce more milk than local<br />
Merino sheep (Figure 1).<br />
Milk yield<br />
(g/day)<br />
800<br />
600<br />
400<br />
200<br />
0<br />
800<br />
600<br />
400<br />
200<br />
0<br />
0<br />
1<br />
2<br />
Merino<br />
3<br />
4<br />
Merino<br />
5<br />
6<br />
7<br />
8<br />
Milked from<br />
week 1<br />
Milked from<br />
week 4<br />
Awassi x Merino<br />
Awassi x Merino<br />
9 10 11 12 13 14 15 16 17 18 19 20 21<br />
Week<br />
Figure 1. Lactation curves <strong>of</strong> Awassi x Merino (n=45) and Merino (n=22) ewes<br />
milked immediately after lambing (AxM, n=22; M, n=6) or after four<br />
weeks <strong>of</strong> nursing <strong>the</strong>ir own lambs (AxM, n= 23; M, n=16).
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