Stable isotope analyses document intraguild predation in wolf spiders (Araneae: Lycosidae) and underline beneficial effects of alternative prey and microhabitat structure on intraguild prey survival

Article Abstract:

A study investigates whether tracing stable isotopes would allow distinction between different types of predation and confirmation of intraguild predation (IGP). Results reveal that stable isotope analysis serves as a proven powerful tool to investigate animal behavior without direct observation, and allows disentangling predator feeding behavior when more than one type of prey is present.

Germany, Food and nutrition, Food chains (Ecology), Food chains, Spiders, Isotope shift

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Assessing differential prey selection patterns between two sympatric large carnivores

Article Abstract:

Wolf and puma populations appeared to prefer older prey and elf calves, yet varied in significant details. Wolf kills tended to reflect the entire study habitat, while the primary factor in cougar prey selection seemed to be limited by size.

Analysis, Wolves, Ecological research, Pumas, Puma, Arctic wolf

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