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Related Experiment Videos

Effect of congeneric chemical signals of different ages on foraging response and food choice in the field by golden

A Dobly1, F M Rozenfeld, A Haim

  • 1Behavioural Biology of Mammals, Free University of Brussels (ULB), Belgium. adobly@ulb.ac.be

Journal of Chemical Ecology
|November 17, 2001
PubMed
Summary
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Semiochemical signals from common spiny mice (Acomys dimidiatus) influence golden spiny mice (Acomys russatus) foraging behavior. Fresh scents reduce feeding efficiency, supporting temporal segregation in these coexisting desert rodents.

Area of Science:

  • Ecology
  • Animal Behavior
  • Chemical Ecology

Background:

  • Acomys dimidiatus and Acomys russatus coexist in arid Israeli Rift Valley.
  • These species exhibit temporal segregation: A. dimidiatus is nocturnal, A. russatus is diurnal.
  • Semiochemicals from A. dimidiatus affect A. russatus's daily rhythms.

Purpose of the Study:

  • To investigate the field response of Acomys russatus to semiochemicals of varying ages from Acomys dimidiatus.
  • To understand the role of olfactory cues in mediating interspecific interactions and resource partitioning.

Main Methods:

  • Field experiments comparing feeding and behavioral variables in A. russatus.
  • Exposure of A. russatus to fresh and aged urine and feces from A. dimidiatus.
  • Observation of foraging efficiency and sensory behaviors.

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Main Results:

  • Fresh semiochemical signals from A. dimidiatus significantly decreased feeding efficiency in A. russatus.
  • A. russatus exhibited an increased rate of smelling from a distance when exposed to fresh signals.
  • These responses suggest an avoidance behavior triggered by predator or competitor cues.

Conclusions:

  • Semiochemicals, particularly fresh ones in urine and feces, play a crucial role in maintaining temporal segregation between A. dimidiatus and A. russatus.
  • Olfactory communication mediates coexistence by influencing foraging behavior and potentially predator avoidance.