Springtail postmolt vulnerability to pseudoscorpion predation: mechanisms and implications

Arthropod prey are expected to be more vulnerable to their predators immediately following molt. The effects of springtail (Isotoma carpenteri) postmolt vulnerability on interactions with a pseudoscorpion predator were examined in the laboratory. Springtails exposed to vials pretreated with pseudosc...

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Bibliographic Details
Published in:Journal of insect behavior 1996-05, Vol.9 (3), p.395-406
Main Authors: Witt, D.L. (Simon Fraser University, Burnaby, B.C., Canada.), Dill, L.M
Format: Article
Language:English
Subjects:
Animal ethology
Apochthonius minimus
Biological and medical sciences
COLLEMBOLA
DEPREDACION
ESCAPE RESPONSES
Fundamental and applied biological sciences. Psychology
HANDLING
handling time
ISOTOMA
Isotoma carpenteri
Isotomidae
MANIPULACION
MANUTENTION
molting delay
MOULTING
MUDA
MUE
PREDATION
PREDATOR PREY RELATIONS
prey choice
Protozoa. Invertebrata
PSEUDOSCORPIONES
Psychology. Psychoanalysis. Psychiatry
RELACIONES PREDATOR PRESA
RELATION PREDATEUR PROIE
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Summary:Arthropod prey are expected to be more vulnerable to their predators immediately following molt. The effects of springtail (Isotoma carpenteri) postmolt vulnerability on interactions with a pseudoscorpion predator were examined in the laboratory. Springtails exposed to vials pretreated with pseudoscorpions (Apochthonius minimus) delayed molting compared to those prey that were exposed to vials pretreated only with springtails. Although their escape ability (measured as distance jumped) was unaffected by molt condition, postmolt springtails were more profitable in terms of reduced predator handling time following capture. Despite this, A. minimus did not distinguish between post-molt and intermolt prey presented at either end of a T-maze.
ISSN:0892-7553
1572-8889
DOI:10.1007/BF02214018