A pelleted ration was fed limited or ad libiturn to two groups of seven Shetland 8month-old ponies for 117 days. During the last 56 days, gelatin was added to the diets of four animals in each of the two intake groups. Gelatin was added at levels of 30 and 90 g per 100 kg body weight for the first and second 28-day periods, respectively. Ponies fed the diet ad libitum consumed 180% more feed, h...

The effect of dietary fat, energy restriction, and exercise on N-nitrosomethylurea (NMU:CAS:684-93-5)-induced mammary tumorigenesis in female F344 rats was investigated. Rats were fed the NIH-07 diet until N-nitrosomethylurea administration on Day 50 of age, when they were transferred to six treatment groups. Three sedentary groups were fed either high-fat (20%, w/w), medium-fat (10%), or low-f...

1. A group of rats were given ad lib. a diet with a protein-energy: total energy (P: E) value of 0.03. Other animals received the same protein intake (g/kg body-weight per d) as this group, but had their energy consumption reduced lo either 90, 80. 70, 60 or SO% of the ad lib. value. 2. The restricted growth rate of rats fed on the P:E -0.03 diet ad lib. has been shown to be due entirely to the...

The purpose of this study was to determine the influence of diethylstilbestrol (DES) and differing nutritional regimens on respiratory and heart rates, electrocardiogram (EKG) patterns, rectal temperature and blood lactic acid values of steers. Sixteen Angus steers were fed a 75% concentrate diet ad ffbitum for a 28-day standardization period. Eight steers were then fed 20 mg DES per steer per ...

1. A group of rats were given ad lib, a diet with a protein-energy: total energy (P:E) value of 0 . 03. Other animals received the same protein intake (g/kg body-weight per d) as this group, but had their energy consumption reduced to either 90, 80, 70, 60 or 50% of the ad lib. value. 2. The restricted growth rate of rats fed on the P:E--0 . 03 diet ad lib. has been shown to be due entirely to ...

Species that display seasonal variation in sickness intensity show the most intense response in the season during which they have the highest body mass, suggesting that sickness intensity may be limited by an animal's energy stores. Siberian hamsters (Phodopus sungorus) display lower body masses and less intense sickness when housed in short, winter-like days as opposed to long, summer-like day...

The effect of 30% caloric restriction on azoxymethane (AOM)-induced colon carcinogenesis was investigated in male F344 rats. Starting at 5 weeks of age, groups of animals were fed ad libitum a high-fat (23.5%) semipurified diet. At 7 weeks of age, all animals except the vehicle-treated groups were s.c. injected with AOM (15 mg/kg body wt, once weekly for 2 weeks). Four days after the second AOM...

The effect of moderate food restriction on pregnancy-associated changes in weight gain, body composition, and circulating insulin-like growth factors (IGF) I and II and IGF-binding proteins (IGFBP)-1 through -4 and their relationship was determined in the guinea pig. Pregnancy did not stimulate weight gain but reduced fat deposition in ad libitum-fed animals and increased weight gain and fat de...

The melanocortin receptor (MC3-R and MC4-R) antagonist, agouti-related protein (AGRP), is a potent stimulant of food intake. We examined the effect of chronic intracerebroventricular (ICV) AGRP treatment on energy metabolism and pituitary function in ad libitum fed rats and rats administered AGRP and then pair-fed to a saline control group. Chronic ICV AGRP (83-132) administration (1 nmol/day f...

Weanling mice were fed on a control diet ad lib., a vitamin A-deficient diet ad lib. or pair-fed to the intake of the vitamin A-deficient group. Vitamin A deficiency was induced by 63-70 d of age. On day 77 mice were given 30 microliters rotavirus/mouse orally and examined histologically 1 week later. There were no changes in relative liver weight in any of the groups, but following infection a...