Effects of intragastric loads of xylose, sodium chloride and corn oil on feeding behavior of ponies.
Abstract: This series of experiments was designed to investigate gastrointestinal (GI) stimuli that contribute to the normal control of feed intake in ponies. Osmotic stimuli were tested using intragastric (IG) infusion of .83 osmolar solutions of xylose (250 g) and NaCl (48 g) vs 2-liter water controls. Treatments were given 15 min before ponies were allowed ad libitum access to pelleted feed after a 4-h fast. Both hyperosmotic solutions delayed onset of the first meal (xylose: 72 ± 32 min, P<.05; NaCl: 71 ± 40 min, P<.1), resulting in an immediate reduction (P<.01) in feed intake. No effects were observed 3 to 18 h post-treatment and 24-h intake was not affected. The behavioral responses to the hyperosmotic solutions, however, were different. The xylose-treated ponies displayed normal sequences of satiety behaviors before eating their first meal, whereas the salt infusion caused moderate to severe colic in five of seven of the same animals. Nutrient stimuli were tested using infusions of corn oil (133 g) or mineral oil (133 g) administered 15 min before the ponies were fed after a 4-h fast. Corn oil did not alter the onset of feeding or the size or duration of the first meal relative to control values. The first intermeal interval, however, was prolonged (91 ± 27 vs 29 ± 4 min; P<.05) and feed intake 3 to 18 h post-treatment was reduced (1.00 ± .42 vs 2.01 ± .30 kg; P<.05) by corn oil relative to mineral oil. These results are comparable to those obtained in earlier experiments testing nutrient vs bulk solutions. It appears that nutrients in the gastrointestinal tract of ponies provide stimuli that affect subsequent feeding responses primarily by delaying onset of meals. Osmotic stimuli do not appear to play a major role in the satiety responses.
Publication Date: 1983-02-01 PubMed ID: 6341344DOI: 10.2527/jas1983.562302xGoogle Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov\'t
- Research Support
- U.S. Gov\'t
- Non-P.H.S.
- Research Support
- U.S. Gov\'t
- P.H.S.
Summary
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The research explores the impact of gastrointestinal stimuli such as xylose, sodium chloride and corn oil on the feeding behavior of ponies. The study found that these stimuli affected the timings and amounts of food intake, but not the overall daily intake.
Research Design and Methodology
- The research was designed to investigate the ways in which various substances in the gastrointestinal tract can influence the normal control of feed intake in ponies.
- The researchers carried out a series of experiments involving intragastric infusion solutions of xylose, sodium chloride, and corn oil.
- The experiments were done 15 minutes before the ponies had access to their feed, after a fasting period of four hours.
- The responses of the ponies to these nutrient stimuli were observed and documented.
Key Findings and Observations
- Two hyperosmotic solutions, xylose and sodium chloride, delayed the onset of the first meal and resulted in a reduction in immediate feed intake.
- However, no effects were noticed in the period from 3 to 18 hours post-treatment. Moreover, the overall food intake in 24 hours remained unaffected.
- Interestingly, the behavioral responses to the two hyperosmotic solutions were different. Ponies treated with xylose showed typical patterns of satiety behaviors before starting their meal. In contrast, ponies treated with sodium chloride experienced moderate to severe colic.
- Infusion of corn oil did not change the onset of feeding or the size or duration of the first meal. However, it did lengthen the time between meals and reduced feed intake in the period from 3 to 18 hours post-treatment.
Conclusions and Implications
- Results indicate that nutrients present in the gastrointestinal tract of ponies play a role in subsequent feeding responses, mainly by delaying the onset of meals.
- Osmotic stimuli, on the other hand, may not have a significant role in satiety responses.
- The findings can have implications for managing the dietary habits and health of ponies and potentially other similar animals.
Cite This Article
APA
Ralston SL, Baile CA.
(1983).
Effects of intragastric loads of xylose, sodium chloride and corn oil on feeding behavior of ponies.
J Anim Sci, 56(2), 302-308.
https://doi.org/10.2527/jas1983.562302x Publication
Researcher Affiliations
MeSH Terms
- Animals
- Blood Glucose / metabolism
- Corn Oil
- Dietary Fats / administration & dosage
- Fasting
- Feeding Behavior
- Female
- Horses / physiology
- Insulin / blood
- Intubation, Gastrointestinal / veterinary
- Male
- Oils / administration & dosage
- Osmolar Concentration
- Sodium Chloride / administration & dosage
- Xylose / administration & dosage
- Xylose / blood
Grant Funding
- GM-02051-10 / NIGMS NIH HHS
Citations
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