Evaluation of Factors Affecting Lamb Carcass Characteristics

Cassard, D. W.; Bailey, Curtiss M.; Mcneal, L. G.

doi:10.2527/jas1969.283305x

Cited by 1 publication

(2 citation statements)

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“…We could find no information on maintenance requirements comparing meat and wool breeds of sheep. Cassard et al (1969) reported that Suffolk lambs had greater longissimus muscle area than wool type breeds of sheep, which could indicate a higher lean and a lower fat percentage in Suffolk than in Targhee sheep. Chemical analysis of soft tissue (Dahmen et al, 1985) from racks showed that Suffolk-sired lambs had a higher percentage of protein and a lower percentage of fat than did Lincoln-sired lambs.…”

Section: Periodsmentioning

confidence: 97%

“…Time required for and efficiency with which lambs reach a desired slaughter weight is critical in optimizing lamb profitability. Studies by Cassard et al (1969) and Crouse et al (1981) reported that Rambouillet-sired lambs from fine-wool type ewes required more time on feed to reach slaughter weight than lambs sired by Suffolk rams. Crouse et al (1981) also reported excess carcass fat in fine-wool slaughter lambs compared with Suffolk × fine-wool breeds and Suffolk-sired slaughter lambs (Crouse et al, 1981).…”

Section: Introductionmentioning

confidence: 99%

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Relationships among ewe milk production and ewe and lamb forage intake in Suffolk and Targhee ewes nursing single or twin lambs.

Ramsey

Hatfield

Wallace

1998

Journal of Animal Science

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Suffolk and Targhee ewes (30 each) with single or twin lambs were used in four periods beginning in late gestation and continuing through weaning to evaluate breed differences in milk production, lamb BW, and DMI by ewes and lambs. In Periods 1 (late gestation) and 2 (early lactation), ewes (Period 1) and ewes with lambs (Period 2) were individually penned, fed .45 kg of barley x ewe(-1) x d(-1) and allowed ad libitum access to chopped alfalfa. Ewes and lambs grazed native range in Periods 3 and 4. Grazed forage DMI was estimated using chromic oxide. Estimates of milk production were obtained by handmilking. Average lamb age was 4, 45, and 73 d at the beginning of Periods 2, 3, and 4, respectively. Milk production tended (P = .20) to be greater for Suffolk than for Targhee ewes. Targhee ewes produced 85% more (P = .001) wool than Suffolk ewes. From 33 d prepartum to 89 d postpartum, Suffolk ewes consistently weighed more (P = .001) than Targhee ewes. Suffolk ewe BW loss (-.15 kg/d) was greater (P = .01) than Targhee ewe BW loss (-.02 kg/d) from 33 d prepartum to 6 d postpartum. From 6 to 89 d postpartum BW gain did not differ (P = .69; .05 kg/d) between breeds. From birth to 89 d postpartum, Suffolk lambs consistently weighed more than Targhee lambs (P = .003). From birth to 89 d postpartum, ADG was greater for Suffolk than for Targhee lambs (P = .006). Targhee ewes consumed 25% more (P = .01) feed over the course of the study than did Suffolk ewes. Grazed forage DMI by Targhee lambs was 26% greater (P = .01) than DMI by Suffolk lambs. When meat production is the primary income from sheep, one potential advantage of Suffolks compared with Targhees is more rapid gain with less feed intake.

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Section: Periodsmentioning

confidence: 97%