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épartition alvéolaire et citernale. Ann. Zootech. 45:159-172. Levy, H. R. 1964. The effects of weaning and milk on mammary fatty acid synthesis. Biochim. Biophys. Acta. 84:229-238. Marnet, P.G., and J.F. Combaud. 1995. Pharmacological evidence for an oxytocin-like hormone in early pregnancy corpus luteum in sheep. Pages 545-555 in Oxytocin: cellular and molecular approaches in medicine and research. R. Ivell and J.A. Russell, ed. Plenum Press, New York. Marnet, P.G., J.A. Negrão, and J. Labussière. 1998. Oxytocin release and milk ejection parameters during milking of dairy ewes in and out of natural season of lactation. Small Rum. Res. 28:183-191. McKusick, B.C., Y.M. Berger, and D.L. Thomas. 1999a. Effects of three weaning and rearing systems on commercial milk production and lamb growth. Pages 16-31 in Proc. Fifth Great Lakes Dairy Sheep Symp., Univ. Wisconsin, Madison, Dept. Anim. Sci. and Univ. Vermont, Burlington, Cntr. Sustainable Agric. McKusick, B.C., Y.M. Berger, and D.L. Thomas. 1999b. Preliminary results: Effect of udder morphology on commercial milk production of East Friesian crossbred ewes. Pages 81-92 in Proc. Fifth Great Lakes Dairy Sheep Symp., Univ. Wisconsin, Madison, Dept. Anim. Sci. and Univ. Vermont, Burlington, Cntr. Sustainable Agric. Murdoch, W.J., and E.A. Van Kirk, E.A. 1998. Luteal dysfunction in ewes induced to ovulate early during the follicular phase. Endocrinology. 139:3480-3484. Ollivier-Bousquet, M., and R. Courrier, R. 1976. Effet de l’ocytocine in vitro sur le transit intracellulaire de la sécrétion des protéines du lait. C.R. Acad. Sc. Paris, t.282, série D-1433, 13-18. Peaker, M., and D.R. Blatchford, D.R. 1988. Distribution of milk in the goat mammary gland and its relation o the rate and control of milk secretion. J. Dairy Res. 55:41-48. Rasmussen, F.E., M.C. Wiltbank, J.O. Christensen, and R.R. Grummer. 1996. Effects of fenprostalene and estradiol-17_ benzoate on parturition and retained placenta in dairy cows and heifers. J. Dairy Sci. 79:227-234. SAS User’s Guide: Statistics, Version 8 Edition. 1999. SAS Inst., Inc., Cary, NC. Schams, D., A. Lahlou-Kassi, and P. Glatzel, P. 1982. Oxytocin concentrations in peripheral blood during the oestrous cycle and after ovariectomy in two breeds of sheep with low and high fecundity. J. Endocrinol. 92:9-13. Smith, L.W., and E.K. Inskeep, E.K. 1970. Effect of progestins on lactation in the ewe. J. Anim. Sci. 30:957-959. Wilde, C. J., D.T. Calvert, A. Daly, and M. Peaker. 1987. The effect of goat milk fractions on synthesis of milk constituents by rabbit mammary explants and on milk yield in vivo. Biochem. J. 242:285-288. Williamson, D. H., V. Ilic, and P., Lund. 1995. A role for medium-chain fatty acids in the regulation of lipid synthesis in milk stasis? Pages 239-251 in Intercellular Signaling in the Mammary Gland. C.J. Wilde et al., ed. Plenum Press, NY. Young, W.S., E. Shepard, J. Amico, L. Hennighausen, K.U. Wagner, M.E. LaMarca, C. McKinney, and E.I. Ginns. 1996. Deficiency in mouse oxytocin prevents milk ejection, but not fertility or parturition. J. Endocrinol. 8:847- Zamiri, M.J., A. Qotbi, and J. Izadifard. 2001. Effect of daily oxytocin injection on milk yield and lactation length in sheep. Sm. Rum. Res. 40:179-
Table 1. Least squares means ± SEM for lactation traits and serum progesterone for the treatment x period combinations. Trait Milk yield, kg/d Milk flow rate, ml/min Milk fat, % Milk fat, g/d Milk protein, % Milk protein, g/d Serum progesterone, ng/ml corpora lutea. 853. 185. Treatment 2 Experimental period 1 pre-treatment treatment post-treatment CLY 1.42 ± 0.03 b CLN 1.47 ± 0.03 b CLY 206 ± 11 b CLN 219 ± 11 b CLY 6.46 ± 0.12 a CLN 5.75 ± 0.12 c CLY 87.0 ± 2.6 ab CLN 81.3 ± 2.6 b CLY 5.69 ± 0.06 a CLN 5.53 ± 0.06 ab CLY 79.6 ± 1.7 ab CLN 77.7 ± 1.7 bc CLY 2.3 ± 0.2 c CLN 2.0 ± 0.2 c 1.56 ± 0.01 a 1.44 ± 0.01 b 244 ± 6 a 208 ± 6 b 6.14 ± 0.06 b 5.73 ± 0.06 c 92.2 ± 1.3 a 81.1 ± 1.3 b 5.44 ± 0.03 b 5.53 ± 0.03 ab 83.7 ± 0.8 a 77.5 ± 0.8 bc 5.3 ± 0.2 a 2.9 ± 0.2 b a,b,c,d Within a trait, means with different superscripts differ (P < 0.05). 1 Pre-treatment: d 0 to 5; treatment: d 6 to 18; and post-treatment: d 19 to 25. 2 Treatment during d 6 to 18: CLY = ewes with corpora lutea; CLN = ewes without 1.35 ± 0.02 c 1.25 ± 0.02 d 212 ± 9 b 169 ± 9 c 6.68 ± 0.16 a 6.33 ± 0.16 ab 82.9 ± 3.7 ab 70.2 ± 3.7 c 5.60 ± 0.08 ab 5.63 ± 0.08 ab 70.8 ± 2.4 c 60.9 ± 2.4 d 0.7 ± 0.2 d 0.8 ± 0.2 d
Page 1 and 2:
Proceedings of the 7 th Great Lakes
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ORGANIZING COMMITTEE 7 TH GREAT LAK
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Thursday, November 1 Noon Registrat
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SPEAKERS Dr. Juan-José Arranz, Dpt
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Table of Contents (continued) Lates
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eeding and were created to have hig
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Disease in the U.K. and subsequentl
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sheep production conditions in Wisc
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Pinelli, F., P. A. Oltenacu, G. Ian
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Bucket milking and elevated platfor
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Throughputs in different parlors No
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1 - Stand up as straight as possibl
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Roques J.L.. 1997. Traite des brebi
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Grade B milk quality is as follows:
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(c) Not Applicable (d) At least 10
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TOILET AND WATER SUPPLY 7. Toilet (
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(c) Drugs and medicinals shall be l
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FARMSTEAD CHEESE AND MARKETING Stev
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5. Cheese is delivered in person, w
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to participate with us, we are enga
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The key points to this plan were: Y
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Milk is supplied in two major forms
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MANAGEMENT OF A DAIRY SHEEP OPERATI
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4 3.5 3 2.5 2 1.5 1 0.5 Chart 1: Mi
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Facilities and Equipment The requir
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from the ewes at 12 to 24 hours of
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COMPARISON OF EAST FRIESIAN AND LAC
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two-year-olds in 2001. East Friesia
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Reproduction. Table 4 compares the
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six ewes were sired by Lacaune ram
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FACTORS AFFECTING THE QUALITY OF EW
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Sheep Genetic factors breed and gen
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Genetic factors The breed and genot
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Physiological factors affecting she
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Management factors affecting the qu
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sheep with one peak of milk ejectio
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An important aspect of dietary fibr
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References Alais C. (1974). Science
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Bufano G., Dario C. and Laudadio V.
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Cowan R.T., Robinson J.J., McHattie
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Folman Y., Volcani R. and Eyal E. (
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Kalantzopoulos G. (1994). Influence
Page 85 and 86:
McHattie I., Fraser C., Thompson J.
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Peart J.N. (1970). The influence of
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Ranieri M.S. (1993). La variazione
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Treacher T.T. (1970). Effects of nu
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EVALUATION OF SENSORY AND CHEMICAL
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ing, the cheeses were brined for 18
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The FFA concentrations generally in
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Table 1. Composition of pasteurized
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Table 6. Body and texture scores 1
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Present Development of Selection Sc
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Breed Usage in Europe Crossbreeding
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nearly 1. As a consequence this cha
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Table 5. Repeatabilities and phenot
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percentage is not expected to resul
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Improved AI technique Artificial in
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Identifying major genes or QTL rela
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Figure 5. Half-sib families and QTL
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In the case of cheese the problem i
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Emanuelson, U., Danell, B., Philips
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Rothschild, M. F., Soller, M. (1997
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teat placement in dairy ewes (Fern
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that of the average milking time. M
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1988) and active expulsion of fat f
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References Barillet, F., and F. Boc
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Table 1. Least squares means ± SEM
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Table 3. Simulation of parlor throu
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EFFECT OF REDUCING THE FREQUENCY OF
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Individual ewe milk production (mor
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dimanche soir sur les brebis de rac
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A B A Morning milk yield, kg B Adj.
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Background and History: Most sheep
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Percent 100 80 60 40 20 0 87 Effect
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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 and 182: The University of Western Australia
Page 183 and 184: Heterosis did not seem to intervene
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: etween milkings. Finally, this woul
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
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