Behavioural Studies of Harpalus rufipes De Geer : an Important Weed Seed Predator in Northeastern US Agroecosystems
Joint Authors
Gallandt, Eric R.
Harrison, Sara
Source
International Journal of Ecology
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-02-16
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Biology
Abstract EN
Harpalus rufipes, a member of the Carabidae, is the most common granivorous invertebrate in Maine agroecosystems.
While previous research demonstrated a positive correlation between H.
rufipes activity-density and weed seed predation, little is known about the behaviour of this seed predator.
We conducted mesocosm experiments to examine seed burial, soil surface conditions, and seed mass effects while tracking H.
rufipes movement using a video camera, capture card, and EthoVision software.
H.
rufipes showed a preference (P<0.001), for seeds on the soil surface compared to those half or fully buried.
Species with larger seeds were preferred, but Amaranthus retroflexus, which had the smallest seeds, had the highest feeding efficiency (i.e., seeds eaten per distance travelled).
Undisturbed soil resulted in highest predation rates, presumably because seeds were easier to detect relative to disturbed soil.
Video-tracking measurements of duration within areas of particular seeds, and efficiency of seed predation, indicate that H.
rufipes behaviour is prey dependent.
American Psychological Association (APA)
Harrison, Sara& Gallandt, Eric R.. 2012. Behavioural Studies of Harpalus rufipes De Geer : an Important Weed Seed Predator in Northeastern US Agroecosystems. International Journal of Ecology،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-502903
Modern Language Association (MLA)
Harrison, Sara& Gallandt, Eric R.. Behavioural Studies of Harpalus rufipes De Geer : an Important Weed Seed Predator in Northeastern US Agroecosystems. International Journal of Ecology No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-502903
American Medical Association (AMA)
Harrison, Sara& Gallandt, Eric R.. Behavioural Studies of Harpalus rufipes De Geer : an Important Weed Seed Predator in Northeastern US Agroecosystems. International Journal of Ecology. 2012. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-502903
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-502903