Effects of interspecific competition, predation, and their interaction on survival and development time immature Anopheles quadrimaculatus

Tiffany M. Knight, Jonathan M. Chase, Charles W. Goss, Jennifer J. Knight

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

We examined the effect of predation by the backswimmer (Notonecta undulata; Hemiptera: Notonectidae), competition by zooplankton and snails, and both predation and competition on the survival and development time of larval Anopheles quadrimaculatus mosquitoes in experimental mesocosms. We found that both predation and interspecific competition greatly reduced the survivorship of larvae and the number of larvae emerging into adulthood. Treatments with both predators and competitors had fewer larvae transitioning among instars and into adulthood but not in an additive way. In addition, mosquito larvae in the presence of predators and competitors took two days longer to emerge than where predators and competitions were absent. Our work provides evidence that biotic interactions, such as predation and competition, can strongly regulate the number of mosquito larvae by reducing the number of larvae that survive through instars and to emergence and by increasing the generation time.

Original languageEnglish
Pages (from-to)277-284
Number of pages8
JournalJournal of Vector Ecology
Volume29
Issue number2
StatePublished - Dec 1 2004

Keywords

  • Anopheles quadrimaculatus
  • Development time
  • Interspecific competition
  • Notonecta undulata
  • Predation
  • Survival
  • Zooplankton

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