Fat-borne volatiles and sheepmeat odour.

The effects of lamb age and diet on volatiles from fat are described. Rendered fat from ram lambs raised on ewe's milk then a corn-based diet was compared with that from lambs raised on milk and a pasture of grass/clover, six treatments in all. An additional treatment comprised very old ewes maintained on pasture.

Effects of a chronic GRF treatment on lambs having low or normal birth weight.

The effects of a long term treatment with human GRF(1-29)NH2 on plasma growth hormone (GH), somatomedin C (Sm-C), histomorphometric parameters of bone growth and body composition were investigated in normal and low birthweight male lambs. The animals were divided into two groups according to their birthweight: 24 normal birthweight (NBW) lambs weighing more than 4 kg and 22 low birthweight (LBW) lambs weighing less than 2.5 kg at birth.

[Effects of GRF 1-29 in normal and hypotrophic lambs].

Injections of hGRF rapidly stimulated GH secretion in lamb and this response was significantly higher in hypotrophic than in normal lambs. The treatment had an effect on body composition reducing the retention of lipids and the energy level and increasing calcium and phosphorus content. The results showed that GRF affected both metabolism and skeletal growth of ruminants, stimulating specially the production of Sm-C and proliferation of chondrocytes.

[Estimation in vivo of the body composition of the ewe by measuring the diffusion space of heavy water].

Relationships for estimating body lipids, energy and proteins from the deuterium-oxide (D2O) diffusion space have been determined using 38 dry, pregnant or lactating ewes. The animals were fed as usual and had free access to water up to slaughter. They were injected with deuterium-oxide in the morning, half an hour to 3 hours after being fed the whole daily ration or half of it.

[Protein retention in ruminants: changes with body weight and variation with breed, sex and feeding level].

Using a great amount of published and unpublished data, this paper analyzes changes in the protein content of the empty body of growing cattle and sheep (appendices 1, 2). Protein content (p. 100 of empty body weight) usually increased from 6-7 p.