Argentine ants will do anything for sugar, but they won't do this
When foraging, internal needs for particular nutrients might affect food choice, and external constraints, such as predation risk, might impact tradeoffs between foraging and risk avoidance. Examining both internal and external constraints simultaneously can provide important insights about how animals make decisions. We examined how internal nutritional needs and external cues of mortality risk jointly impact the foraging behavior of ants.
We starved groups of ants for either proteins or carbohydrates and determined the foraging choices that ants made when cues of heterospecifics were present. We found that ants preferentially forage for carbohydrates in high-risk conditions. Furthermore, starvation for carbohydrates increased the ants’ preference for carbohydrates, even when cues of heterospecifics were present at both carbohydrates and protein resources.
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