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Related Concept Videos

Obedience01:08

Obedience

According to obedience research, we may harm others under the forceful pressures of an authority figure (Milgram, 1974). How about if the inappropriate orders were delivered with less force? The increasing interdependence between nurses and physicians compelled Hofling and his colleagues to explore nurses’ reactions to a potentially harmful medical request made by the perceived authority figure, the doctor (Hofling, Brotzman, Dalrymple, Graves, & Pierce, 1966). In this situation, obedience...
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Cooperative Binding of Transcription Regulators02:13

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Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome.  Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...
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Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome.  Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...
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Related Experiment Video

Updated: May 28, 2026

Operation of the Collaborative Composite Manufacturing (CCM) System
10:09

Operation of the Collaborative Composite Manufacturing (CCM) System

Published on: October 1, 2019

Calling by concluding sentinels: coordinating cooperation or revealing risk?

Linda I Hollén1, Matthew B V Bell, Alexis Russell

  • 1School of Biological Sciences, University of Bristol, Bristol, United Kingdom. linda.hollen@bristol.ac.uk

Plos One
|October 11, 2011
PubMed
Summary

Pied babblers do not use "fast-rate chuck" calls to coordinate sentinel behavior. These vocalizations do not influence sentinel rotation or predator detection, suggesting they serve other functions.

Related Experiment Videos

Last Updated: May 28, 2026

Operation of the Collaborative Composite Manufacturing (CCM) System
10:09

Operation of the Collaborative Composite Manufacturing (CCM) System

Published on: October 1, 2019

Area of Science:

  • Animal behavior
  • Avian communication
  • Ecology

Background:

  • Cooperative behaviors in social animals often involve vocalizations for coordination.
  • Sentinel behavior, where individuals act as lookouts, is a common cooperative strategy in birds and mammals.
  • The function of specific vocalizations in regulating cooperative sentinel systems remains an area of investigation.

Purpose of the Study:

  • To investigate the role of 'fast-rate chuck' calls in regulating cooperative sentinel behavior in pied babblers (Turdoides bicolor).
  • To determine when these calls are given and their effect on the interval between sentinel bouts.

Main Methods:

  • Observational studies of pied babbler sentinel behavior and call usage.
  • Experimental playback of 'fast-rate chuck' calls to assess their impact on sentinel behavior.
  • Analysis of call occurrence in relation to environmental factors like wind and habitat.

Main Results:

  • 'Fast-rate chuck' call utterance was only marginally influenced by wind conditions and not by habitat.
  • Experimental playback demonstrated that these calls have no significant effect on the interval between sentinel bouts.
  • Contrary to expectations, the calls do not appear to coordinate sentinel rotation or regulate predator signaling.

Conclusions:

  • Pied babblers do not utilize 'fast-rate chuck' calls to optimize the efficiency of their cooperative sentinel system.
  • Vocalizations at the end of sentinel bouts may serve to influence individually driven behaviors rather than group coordination.
  • Further research is needed to elucidate the precise function of these calls in pied babbler social interactions.