Specialized prey selection behavior of two east african assassin bugs, Scipinnia repax and Nagusta sp. that prey on social jumping spiders

Robert R. Jackson, Kathryn Salm, Ximena J. Nelson

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The prey choice behavior and predatory strategies of two East African assassin bugs, Scipinnia repax (Stl 1961) and Nagusta sp. (Hemiptera: Reduviidae), were investigated in the field and the laboratory. Both of these species are from the subfamily Harpactorinae and specialize in eating spiders. They prey especially often on social jumping spiders (Salticidae) that build nest complexes (nests connected by silk) in vegetation near the shoreline of Lake Victoria. Both reduviid species associate with these nest complexes and prey on the resident salticids. Nagusta sp., but not S. repax, form groups on nest complexes with 23 individuals of Nagusta sometimes feeding together on a single salticid. In addition to social salticids, Nagusta sp. preys on Portia africana, an araneophagic salticid that often invades the same nest complexes. S. repax preys on salticid eggs and also on Nagusta. Although they avoid ants, Nagusta and especially S. repax prey on ant-mimicking salticids, suggesting that sensory modalities other than vision play a dominant role in prey detection.

LanguageEnglish
Article number82
JournalJournal of insect science
Volume10
DOIs
Publication statusPublished - 2010

Fingerprint

Reduviidae
Salticidae
Spiders
Ants
nests
Choice Behavior
Hemiptera
Silk
Victoria
Lakes
Eggs
Eating
Formicidae
Portia
Lake Victoria
silk
Araneae
ingestion
vegetation

Keywords

  • araneophagy
  • intraguild predation
  • myrmecomorphy
  • predatory specialization
  • prey-capture behavior
  • Reduviidae, Salticidae

Cite this

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title = "Specialized prey selection behavior of two east african assassin bugs, Scipinnia repax and Nagusta sp. that prey on social jumping spiders",
abstract = "The prey choice behavior and predatory strategies of two East African assassin bugs, Scipinnia repax (Stl 1961) and Nagusta sp. (Hemiptera: Reduviidae), were investigated in the field and the laboratory. Both of these species are from the subfamily Harpactorinae and specialize in eating spiders. They prey especially often on social jumping spiders (Salticidae) that build nest complexes (nests connected by silk) in vegetation near the shoreline of Lake Victoria. Both reduviid species associate with these nest complexes and prey on the resident salticids. Nagusta sp., but not S. repax, form groups on nest complexes with 23 individuals of Nagusta sometimes feeding together on a single salticid. In addition to social salticids, Nagusta sp. preys on Portia africana, an araneophagic salticid that often invades the same nest complexes. S. repax preys on salticid eggs and also on Nagusta. Although they avoid ants, Nagusta and especially S. repax prey on ant-mimicking salticids, suggesting that sensory modalities other than vision play a dominant role in prey detection.",
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Specialized prey selection behavior of two east african assassin bugs, Scipinnia repax and Nagusta sp. that prey on social jumping spiders. / Jackson, Robert R.; Salm, Kathryn; Nelson, Ximena J.

In: Journal of insect science, Vol. 10, 82, 2010.

Research output: Contribution to journalArticleResearchpeer-review

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