Habitat geometry and limited perceptual range affect habitat choice of a trap-building predator

Noa Katz, Inon Scharf*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


By considering various biotic and abiotic factors, organisms are expected to distinguish among suitable habitats of different quality and choose the one that offers them the highest fitness payoff. According to the ideal-free-distribution model, density drives organism choice and ultimately distribution among habitats. However, deviations from the basic model are common, as it does not take into account intrinsic and extrinsic constraints. Two important constraints are those of habitat geometry (e.g. habitat area, habitat shape), and perceptual range. We used a trap-building predator, the wormlion larva, to examine these constraints. We manipulated the geometry of the preferred shaded microhabitat and the distance of individuals from it, and assessed their effect on wormlion habitat choice, distribution patterns, and performance. Habitat geometry affected wormlion microhabitat choice and distribution patterns, measured as distance from the habitat center and spatial pattern type, but had no effect on performance, expressed as the area of the pit-trap constructed. The interaction between habitat geometry and density was inconsistent regarding the distribution patterns, affecting distance from the center but not the spatial pattern type. Furthermore, we found that wormlions demonstrated a low perceptual range, which limited their ability to sense proximate shaded conditions. We highlight the importance of incorporating the interplay between habitat geometry, density, and perceptual range when studying habitat choice and spatial patterns and suggest that spatial patterns should be analyzed in more than a single way.

Original languageEnglish
Pages (from-to)958-964
Number of pages7
JournalBehavioral Ecology
Issue number4
StatePublished - 3 Jul 2018


  • antlion
  • competition
  • habitat selection
  • ideal free distribution
  • pit-building predator
  • spatial pattern
  • wormlion


Dive into the research topics of 'Habitat geometry and limited perceptual range affect habitat choice of a trap-building predator'. Together they form a unique fingerprint.

Cite this