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6 results for “diet complementation”
Carbohydrates complement high protein diets to maximize the growth of an actively hunting predator
<p>In nature, food is often variable in composition and availability. As a consequence, predators may need to seek non-prey food sources. Some predators are known to feed on nectar when food is limited. Nectar and other carbohydrate resources could also be beneficial when prey are more abundant if it helps predators balance protein-biased diets. We tested if an actively hunting predator, the jumping spider, <em>Phidippus audax</em>, benefited from liquid carbohydrates when prey were not limited. We also tested if the benefit of carbohydrates varied with the nutrient content of prey (i.e., from protein to lipid-biased). Spiders were reared on one of six live prey, <em>Drosophila melanogaster</em>, treatments that ranged from high protein to high lipid. Half of the spiders were given access to a 20% sucrose solution. After two months, we measured spider mass, cephalothorax width, instar duration, percent body fat, survival, and estimated number of prey eaten. Spiders reared on high protein diets with carbohydrates were larger and heavier than spiders on other treatments. Access to carbohydrates also increased percent body fat and survival across prey treatments. Our results suggest that carbohydrates may be a valuable component of spider diets, especially when prey have high protein and low lipid content as is commonly observed in prey in the field. Our results highlight the importance of diet balancing for predators, and that liquid carbohydrates can be an important nutrient to supplement a diet of prey rather than just being an energy supplement during periods of starvation.</p>
Carbohydrates complement high protein diets to maximize the growth of an actively hunting predator
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Data from: Diet complementation as a frequency‐dependent mechanism conferring advantages to rare plants via dispersal
1. We used an agent-based model to test the hypothesis that diet complementation by frugivores can promote the persistence of rare plant species in communities (DCH). 2. Models simulated bird movement, frugivory, seed-dispersal, and plant recruitment on landscapes that differed in their degree of fragmentation and in their degree of fruiting species mixing at the scale of frugivores' foraging decisions. 3. Diet complementation promoted the dispersal of rare-species without the need of a priori preference from birds. The effects of landscape structure on the dispersal of rare plants were small (<5%) compared to positive effects of diet complementation because birds tracked the nutrients contained in rare fruits to balance their diets. However, resource-tracking of rare fruits increased foraging costs up to 20% of net energy intakes. 4. During post-dispersal stages, density-dependent mortality only conferred advantages to rare plants when located within hetero-specific plant patches. Still, thanks to rare-biased dispersal, rare plants showed the highest seed dispersal effectiveness irrespectively of landscape configuration. 5. Our theoretical approach presents a behavioral mechanism by which fruit choice can act as a frequency-dependent mechanism conferring rare-species advantages as important as classic post-dispersal density-dependent processes. 6. We hope that this study stimulates future work aimed at evaluating the importance of diet complementation in structuring the composition and spatial patterning of plant communities.
Data from: Diet complementation as a frequency‐dependent mechanism conferring advantages to rare plants via dispersal
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Protein Complementation of Plant-based Diets.
ClinicalTrials.gov study NCT07151625. IPD Sharing: NO. Countries: 1. Publications: 0.
Moderated-fat Diet Complemented With Green Tea Reduces oxLDL and Fat Mass in Obese Women
ClinicalTrials.gov study NCT01628705. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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