Key result
Restricted feed intake during the suckling period in pigs did not appreciably change total fat mass at 80 kg, but resulted in lower intramuscular fat due to fewer and smaller cells.
Why the study?
Does restricted feed intake during the suckling period reduce final fat mass in swine?
Does restricted feed intake during the suckling period reduce final fat mass in swine?
Restriction of caloric intake during the suckling period cannot be employed to reduce overall fat content of market swine, although it does reduce intramuscular fat.
Early feed restriction does not reduce total fat mass in market swine; leaves open effects on intramuscular fat for livestock and developmental research.
This project was developed to investigate the possibility of employing early postnatal nutritional manipulation as a means of changing the final fat mass in swine. Restricted feed intake during the suckling period exerted little effect on the adipose cell number and cell size of subcutaneous, viscera and bone fat of the pig, thus giving no appreciable differences in total fat mass between controls and underfed pigs at a constant body weight of 80 kilograms. Restricting nutrition soon after birth did have an effect on the development of intramuscular fat tissue, resulting in lower marbling scores, lower percent ether extractable lipid in muscle and a lesser amount of total intramuscular fat in underfed pigs. This difference was caused by fewer and smaller cells in underfed pigs, indicating that the nutritional manipulation appeared to change the cell population in this particular adipose site of the pig. This differential response of adipose sites to early nutrition led to a postulate that the intramuscular adipose tissue is the latest developing tissue with some portions of preadipocytes differentiating and developing after birth and thus is under the influence of early nutrition to a greater extent than other adipose tissues. From these findings, it is suggested that the restriction of caloric intake during the suckling period cannot be employed to reduce fat content of market swine.
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Lee et al. (1973) studied Swine (pigs). Restricted feed intake during the suckling period vs. Controls was evaluated on Total fat mass and adipose cell number/size. Restricted feed intake during the suckling period in pigs did not appreciably change total fat mass at 80 kg, but resulted in lower intramuscular fat due to fewer and smaller cells.
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