What do predators really want? The role of gerbil energetic state in determining prey choice by Barn Owls

Keren Embar, Shomen Mukherjee, Burt P. Kotler

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


In predator-prey foraging games, predators should respond to variations in prey state. The value of energy for the prey changes depending on season. Prey in a low energetic state and/or in a reproductive state should invest more in foraging and tolerate higher predation risk. This should make the prey more catchable, and thereby, more preferable to predators. We ask, can predators respond to prey state? How does season and state affect the foraging game from the predator's perspective? By letting owls choose between gerbils whose states we experimentally manipulated, we could demonstrate predator sensitivity to prey state and predator selectivity that otherwise may be obscured by the foraging game. During spring, owls invested more time and attacks in the patch with well-fed gerbils. During summer, owls attacked both patches equally, yet allocated more time to the patch with hungry gerbils. Energetic state per se does not seem to be the basis of owl choice. The owls strongly responded to these subtle differences. In summer, gerbils managed their behavior primarily for survival, and the owls equalized capture opportunities by attacking both patches equally.

Original languageEnglish
Pages (from-to)280-285
Number of pages6
Issue number2
StatePublished - 1 Jan 2014


  • Allenby's gerbil
  • Barn Owls
  • Coexistence
  • Community ecology
  • Foraging game
  • Gerbillus andersoni allenbyi
  • Predator-prey interactions
  • Tyto alba

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics


Dive into the research topics of 'What do predators really want? The role of gerbil energetic state in determining prey choice by Barn Owls'. Together they form a unique fingerprint.

Cite this