Predation ofApochthonius minimus (Pseudoscorpionida: Chthoniidae) onFolsomia canadida (Collembola: Isotomidae) |
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Authors: | Dan L. Johnson W. G. Wellington |
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Affiliation: | (1) Institute of Animal Resource Ecology, University of British Columbia, Vancouver, B. C., Canada |
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Abstract: | Summary We investigated the functional response of the predaceous pseudoscorpion,Apochthonius minimus, to density of the springtail,Folsomia candida, as well as the effects of temperature and prey size on handling time and attack rate. Temperature slightly altered the overall rise in response. Both the rise and shape of the response differed for two prey sizes. The changes in number of prey eaten over a 48-hour period were also examined, and the attack and feeding behaviour ofA. minimus was described and discussed in relation to the predation experiments. The pseudoscorpion preferred young adultF. candida, 0.8–1.2 mm in length, when offered prey in the range, 0.2–1.5 mm. |
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Keywords: | Functional Response Attack Rate Prey Density Prey Size Handling Time |
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