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Energetic cost of communication.

Philip K Stoddard¹, Vielka L Salazar

¹Department of Biological Sciences, Florida International University, University Park, Miami, FL 33199, USA. stoddard@fiu.edu

The Journal of Experimental Biology

|December 24, 2010

Summary

Animal communication signals vary in energy cost. Males in sexually selected species may allocate over 50% of energy to costly signals, like those in electric fish, while females do not. Life history strategies influence these energy trade-offs.

Area of Science:

Animal Behavior
Bioenergetics
Neuroethology

Background:

Communication signals incur varying energetic costs, influenced by signal function and system competition.
Males in sexually selected species often produce high-energy advertisement signals to boost detectability and signal quality.
Energy allocation to signaling ranges significantly, exceeding 50% for acoustic signals in some short-lived species.

Purpose of the Study:

To investigate the mechanisms regulating energy allocation to sexual advertisement signals in gymnotiform electric fish.
To examine energy trade-offs between signal production and other metabolic functions in males and females of Brachyhypopomus gauderio.
To explore the relationship between life history strategies and energy allocation trade-offs in animal signaling.

Main Methods:

Related Experiment Videos

Studied dynamical remodeling of excitable membranes in the electric organ of gymnotiform electric fish.
Analyzed metabolic compartment energy allocation in male and female Brachyhypopomus gauderio.
Compared energy expenditure patterns related to signaling between sexes and across different life histories.

Main Results:

Gymnotiform electric fish exhibit mechanisms for regulating energy in sexual advertisement signals via electric organ membrane remodeling.
Male Brachyhypopomus gauderio strategically trade off energy between signal production and other metabolic functions.
Female Brachyhypopomus gauderio do not exhibit energy trade-offs between signaling and other functions.

Conclusions:

Energetically expensive signal production is fueled by a continuum of strategies across diverse life histories.
Understanding life history's role in energy allocation trade-offs is crucial for future research on animal communication.
Sexual dimorphism in energy allocation strategies is evident, with males prioritizing costly signals.