Comparisons of body composition and energy utilization between Merino and fixed halfbred (Border Leicester × Merino) wethers

Searle, TW; Graham, NM

doi:10.1071/ar9720339

Cited by 18 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recent New Zealand work has, however, established breed differences in the relative growth of muscle, protein, and water (Fourie et al 1970;McConnell & Iagusch 1972;Kirton et al 1974b). The effects of different growth rates on the deposition of carcass fat, and to a lesser extent protein + water, suggested by multiple regression analysis in our experiment have previously been shown by Boccard & Duplan (1961), Seebeck (966) and Searle & Graham (1972). Boccard & Duplan (1961) suggested that slower-growing twin lambs could have advantages by virtue of their lower subcutaneous fat levels.…”

Section: Carcass Fat Carcass Protein Units (Kg)mentioning

confidence: 75%

“…The results from our experiment suggest that there is scope for the use of carcass qualities as well. Their use would become a more practical proposition once in vivo estimates of carcass composition (Pearson 1963;Panaretto 1964;Kirton 1964;Searle & Graham 1972) have been better developed and the prediction relationships for different genotypes clearly established.…”

Section: Carcass Fat Carcass Protein Units (Kg)mentioning

confidence: 99%

See 1 more Smart Citation

Carcass growth and development of Romney, Corriedale, Dorset, and crossbred sheep

Geenty¹

1979

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

Carcass growth and development of 195 Romney, Corriedale, Dorset, and crossbred wethers were studied in a serial slaughter experiment in which animals were killed between 3 and 48 weeks of age. Purebred Dorset wethers were on average 16 %, and Corriedale 9 %, heavier than Romneys from 6 to 48 weeks of age; crossbreds were 6% heavier than purebreds during the same period. Carcass yields (i.e., hot carcass weight adjusted for fasted body weight) were 3% higher for crossbred than purebred wethers, and Dorset-sired progeny had 3% higher values than those sired by Romneys. Allometric growth coefficients based on logarithmic regression relationships for carcass components showed no breed differences, the pooled values being 1.62, 0.92, and 0.82 for fat, protein, and water respectively. Breed means adjusted for carcass weight, however, indicated that lambs sired by Dorset rams had "blockier" carcasses with 83 % of the chemical fat weight of Romney-sired lambs. Lambs with Dorset or Corriedale genes partitioned more fat to internal depots than Romneys. The calculation of multiple regressions indicated a positive association between growth rate and fat deposition. An examination of the uses of physical measurements as predictors of chemical carcass components showed that within sire and dam breed groups internal fat depots provided the best estimates of carcass fat, while breed effects in carcass composition were not accounted for by differences in these depots.

show abstract

Section: Carcass Fat Carcass Protein Units (Kg)mentioning

confidence: 75%

Section: Carcass Fat Carcass Protein Units (Kg)mentioning

confidence: 99%

Carcass growth and development of Romney, Corriedale, Dorset, and crossbred sheep

Geenty¹

1979

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

show abstract

“…Differences in fatness between other breeds and crosses have been shown by Searle and Graham (1972) and Searle and Griffiths (1976) and these authors have suggested that an animal of small mature size has a higher proportion of its body as fat at any given weight than an animal of large mature size.…”

Section: Discussionmentioning

confidence: 88%

Long-Term Effects of Feeding Protected Sunflower Seed Supplement on the Composition of Body Fat in Growing Sheep

Mills¹,

Searle²,

Evans³

1979

Aust. Jnl. Of Bio. Sci.

Self Cite

View full text Add to dashboard Cite

Fifty-one Southdown crossbred and 37 Suffolk crossbred wether lambs were fed for 31 weeks a diet containing 6·6 % by weight linoleic acid derived from a formaldehyde-treated casein-sunflower seed supplement. Serial biopsy samples of subcutaneous fat were obtained during this time and over the following 49 weeks when no supplement was given. Samples of omental, perirenal and subcutaneous fat were obtained from 16 sheep slaughtered 17 weeks after supplementation ceased and the proportion of linoleic acid determined in all samples. Total body fat was estimated from tritiated water space on five occasions during supplementation.The proportion of linoleic acid reached a maximum value of 25 % after 16 weeks and then remained constant while the supplement was being fed. Subsequent changes were related to changes in Iiveweight. Weight loss, either slow or rapid, resulted in only a slight decrease in linoleic acid while weight gain caused a rapid decrease. There was no difference between fat depots, nor was there any breed difference evident in the proportion of linoleic acid at any given time.The Southdown crossbred sheep grew more slowly than the Suffolk crosses and when compared at the same Iiveweight had more total fat and linoleic acid.

show abstract

Influence of metabolizable energy content of the diet and of feeding level on lamb performances. I. growth and body composition

Thériez¹,

Villette²,

Castríllo³

1982

Livestock Production Science

View full text Add to dashboard Cite

Comparisons of body composition and energy utilization between Merino and fixed halfbred (Border Leicester × Merino) wethers

Cited by 18 publications

References 0 publications

Carcass growth and development of Romney, Corriedale, Dorset, and crossbred sheep

Carcass growth and development of Romney, Corriedale, Dorset, and crossbred sheep

Long-Term Effects of Feeding Protected Sunflower Seed Supplement on the Composition of Body Fat in Growing Sheep

Influence of metabolizable energy content of the diet and of feeding level on lamb performances. I. growth and body composition

Contact Info

Product

Resources

About