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Related Concept Videos

Convergent Evolution01:54

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.The structures that arise from convergent evolution are called analogous structures. They are similar in function even if they are dissimilar in structure. Further, structures can be analogous while also...
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Click-based echolocation in bats: not so primitive after all.

Yossi Yovel1, Maya Geva-Sagiv, Nachum Ulanovsky

  • 1Department of Neurobiology, Weizmann Institute of Science, Rehovot, 76100, Israel.

Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
|April 6, 2011
PubMed
Summary
This summary is machine-generated.

Bat echolocation using tongue clicks is not rudimentary. This study shows click-based echolocation performs similarly to laryngeal echolocation in bats, challenging previous assumptions about biosonar capabilities.

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Area of Science:

  • Bioacoustics
  • Animal Behavior
  • Sensory Ecology

Background:

  • Echolocating bats, particularly *Rousettus* (genus), use tongue clicks (lingual echolocation).
  • These clicks were previously thought to be crude due to perceived long durations, now identified as artifacts.
  • Recent findings reveal *Rousettus* clicks are short (~50-100 μs), comparable to dolphin vocalizations.

Purpose of the Study:

  • To compare the performance of lingual echolocation in *Rousettus aegyptiacus* with laryngeal echolocation in *Eptesicus fuscus*.
  • To investigate the sophistication of click-based biosonar systems.
  • To evaluate the potential of click-based echolocation in target ranging and Doppler tolerance.

Main Methods:

  • Experimental comparison of landing and object detection tasks between lingual and laryngeal echolocators.
  • Observation and description of biosonar beam steering strategies in bats using tongue clicks.
  • Theoretical analysis of signal design using autocorrelations and wideband ambiguity functions.

Main Results:

  • Click-based echolocation enables performance comparable to laryngeal echolocation in accurate landing and object detection.
  • A sophisticated behavioral strategy for biosonar beam steering was identified in clicking bats.
  • Theoretical analyses predict click-based echolocation may excel in target ranging and Doppler tolerance.

Conclusions:

  • Click-based echolocation in bats is a viable and sophisticated strategy, not rudimentary.
  • Lingual echolocation performance is similar to laryngeal echolocation, challenging prior beliefs.
  • This finding aligns click-based bat echolocation with the biosonar used by most marine mammals.