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How does the environment affect fighting? The interaction between extrinsic fighting ability and resource value

Sarah M Lane1, Mark Briffa2

  • 1Marine Biology and Ecology Research Centre, Plymouth University, Drake Circus, Plymouth, Devon PL4 8AA, UK sarah.lane@plymouth.ac.uk.

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Environmental factors significantly impact an animal's fighting ability and contest outcomes. These external influences, such as dissolved oxygen levels, can be more critical than intrinsic traits in determining competitive behavior.

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Area of Science:

  • Behavioral Ecology
  • Animal Behavior
  • Environmental Science

Background:

  • Fighting performance depends on both capacity and willingness to compete.
  • Capacity is often viewed as intrinsic, but environmental factors can influence it.
  • Animals in variable environments face rivals with differing environmental exposures.

Purpose of the Study:

  • To investigate the role of extrinsic factors in fighting ability and contest dynamics.
  • To determine the relative importance of environmental conditions versus intrinsic traits in competitive interactions.
  • To examine how resource value and opponent's fighting ability interact to influence contest escalation.

Main Methods:

  • Manipulated extrinsic fighting ability via dissolved oxygen concentration in beadlet sea anemones (Actinia equina).
  • Adjusted resource value using seawater flow rate during simulated fights.
  • Assessed contest dynamics and escalation patterns under controlled environmental conditions.

Main Results:

  • Extrinsic fighting ability of both opponents significantly influenced contest escalation.
  • Environmental factors (dissolved oxygen) and resource value (flow rate) interacted to shape fight outcomes.
  • External drivers of fighting capacity proved more influential than commonly studied intrinsic traits.

Conclusions:

  • Environmental conditions play a crucial role in shaping an animal's fighting ability and competitive behavior.
  • A holistic understanding of contest dynamics requires integrating both intrinsic states and extrinsic environmental factors.
  • Future research should prioritize the influence of environmental heterogeneity on animal interactions.