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Nutrient-Specific Foraging in Invertebrate Predators
Many herbivores and omnivores adjust their food selection behavior to regulate the intake of multiple nutrients. Carnivores, however, are generally assumed to optimize the rate of prey capture ratherExpand
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Value of the Aphid Rhopalosiphum padi as Food for Cereal Spiders
1. Laboratory experiments were carried out to analyse various aspects of spider performance under different diets, focusing mainly on the value of the aphid Rhopalosiphum padi. Aphis fabae and aExpand
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Optimal foraging for specific nutrients in predatory beetles
Evolutionary theory predicts that animals should forage to maximize their fitness, which in predators is traditionally assumed equivalent to maximizing energy intake rather than balancing the intakeExpand
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Protein and carbohydrate composition of larval food affects tolerance to thermal stress and desiccation in adult Drosophila melanogaster.
Larval nutrition may affect a range of different life history traits as well as responses to environmental stress in adult insects. Here we test whether raising larvae of fruit flies, DrosophilaExpand
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Growth, development, and survival of a generalist predator fed single- and mixed-species diets of different quality
Abstract It is often assumed that prey species consumed by generalist predators are largely, though not entirely, equivalent in terms of their value to the predators. In contrast to this expectation,Expand
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Factors influencing cannibalism in the wolf spider Pardosa agrestis (Araneae, Lycosidae)
Abstract Cannibalistic tendencies are well known in spiders and may be a significant factor influencing population size. The wolf spider, Pardosa agrestis, is the dominant non-web-building spider inExpand
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Effects of prey quality and availability on the life history of a trap-building predator
Although generalist predators catch a great diversity of prey species, foraging theory has mostly been concerned with quantitative aspects and neglected questions about the nutrient quality of prey.Expand
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Although spiders in general are polyphagous, indiscriminate feeding is not advantageous because prey vary enormously in quality due to toxicity or nutrient deficiency. Active prey selection serves toExpand
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Behavioral and ecophysiological responses of a generalist predator to single- and mixed-species diets of different quality
Abstract Prey of different quality can be distinguished by their effects on fitness parameters (e.g., survival, growth, development) of the predator. This paper describes a series of experiments withExpand
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Nutrient composition of the prey's diet affects growth and survivorship of a generalist predator
It is well known that secondary chemicals produced at one trophic level may affect organisms at subsequent levels of the food chain. Effects of nutrient supplements may also propagate through trophicExpand
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