Cookies Policy
Cookie Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Patch Defence in the Parasitoid Wasp Trissolcus Basalis: When to Begin Fighting?

MyBook is a cheap paperback edition of the original book and will be sold at uniform, low price.

Buy this article

$30.00+ Tax (if applicable)
Add to Favorites

image of Behaviour

Foragers that exploit defendable patches are faced with a trade-off, between exploiting the patch, and defending it against competitors. In insect parasitoids, this trade-off is compounded by the fact that the host resources are not consumed, but remain in the environment after being exploited and therefore are still vulnerable to attack by competitors. The parasitoid wasp Trissolcus basalis (Hymenoptera: Scelionidae) exploits the egg masses of pentatomid bugs, and females are able to monopolise and defend patches of hosts. However, females usually do not begin fighting immediately, but co-exploit the patch without aggression for some time. This paper uses survival analysis to examine their decision-making rules with respect to when to begin defending a patch. The decision to begin fighting was influenced by the size of the patch, the number of offspring previously invested in the patch, the encounter rate with con specifics, and the encounter rate with unparasitised hosts. These factors reflect a balance between defending the resource and defending offspring, and highlight the increasing value of a patch to a female as she invests more offspring in it.

Affiliations: 1: Department of Crop Protection, Waite Campus, University of Adelaide, South Australia, Department of Entomology, Hebrew University of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel;, Email:; 2: Department of Applied Mathematics, University of Adelaide, South Australia


Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Create email alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Behaviour — Recommend this title to your library

    Thank you

    Your recommendation has been sent to your librarian.

  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation