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Development of a Mobile Mitochondrial Physiology Laboratory for Measuring Mitochondrial Energetics in the Field

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A framework to unlock marine bird energetics.

Ruth E Dunn^1,2, James Duckworth³, Jonathan A Green³

¹Lancaster Environment Centre, Lancaster University, Lancaster, Lancashire, LA1 4YQ, UK.

The Journal of Experimental Biology

|November 22, 2023

Summary

This study presents a new framework to estimate marine bird energy expenditure using accessible data, aiding ecological role assessments. It offers quantitative insights for data-deficient species and their ecosystem influence.

Keywords:

Energy expenditure Field metabolic rate Great auk Sea ducks Seabirds Time budget

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Area of Science:

Ecological Energetics
Avian Ecology
Marine Biology

Background:

Assessing animal ecological roles traditionally requires extensive physiological data, which is difficult to obtain for marine species.
A need exists for a framework to estimate energy expenditure using readily available data for marine birds.

Purpose of the Study:

To present a comprehensive framework for modeling marine bird energetics.
To estimate the energetic costs of key behaviors across diverse marine bird families and ecological guilds.
To demonstrate the framework's utility with a case study on the extinct great auk (Pinguinus impennis).

Main Methods:

Compiled data on time- and energy-intensive behaviors for nine marine bird families and nine ecological guilds.
Developed a predictive model for energy expenditure based on available data.
Applied the model to estimate the year-round energy expenditure of the great auk under various migration scenarios.

Main Results:

Quantified energetic costs for significant behaviors across multiple marine bird groups.
Successfully demonstrated the framework's capacity to predict energetics for a data-deficient species (great auk).
Highlighted the potential for novel, quantitative insights into the ecological influence of marine birds.

Conclusions:

The developed framework provides a valuable tool for understanding marine bird energetics, especially for data-limited species.
This approach enables more accurate assessments of the ecological roles and impacts of marine birds.
The study underscores the power of energetics modeling in advancing ecological research for marine ecosystems.