Effects of prey quality and availability on the life history of a trap-building predator

摘要: 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 prey. Here, we test hypothesis that life history trap-building predator is affected by both availability Under controlled laboratory conditions, orb-weaving spiders (Zygiella x-notata) were raised from hatchlings to maturity on different in amounts. Both had significant but effects many important traits, such as instar duration, number instars used development, body weight at maturation development time. Prey was especially for growth rates whereas most severe juvenile survivorship female fecundity. Furthermore, while low tended reduce induced sex-specific responses numbers. Thus, may be factors shaping evolution traits predators.