No evidence of natal habitat preference induction in juveniles with complex life histories

摘要: Individual variation in physiology and behaviour can have strong effects on ecological evolutionary processes. Natal habitat, one source of individual variation, influence phenotype, fitness through eventual habitat selection. preference induction occurs when individuals match stimuli their selected to those natal habitat. also affect selection its body condition (silver spoon effect). We tested for body-condition-dependent two species with complex life histories, the spotted salamander, Ambystoma maculatum, small-mouthed texanum. reared salamanders from hatchlings mesocosms leaf, grass or control substrate, juvenile behavioural assays. found weak evidence larger having decreased latency sampling more habitats, lending support hypothesis these species. Juveniles preferred litter cues regardless substrate mesocosm, suggesting may not occur histories. propose that histories use simple movement rules, such as moving along gradients, select postnatal a novel environment.