Development and calibration of bioelectrical impedance analysis as a measure of energetic status of arctic grayling

Project Description

The objective of this research is to develop methods to accurately characterize the energetic condition of Arctic grayling. In doing so, we will further refine bioelectrical impedance analysis (BIA), a non-lethal method by which fish energy content is estimated in the field. Currently, proximate analysis is the most reliable means of estimating energy content. Under this method, fish are sacrificed, homogenized, and composition (lipid, protein, carbohydrates, water, and ash) is determined through chemical analysis. Before BIA can be employed extensively, statistical models specific to Arctic grayling must be developed which describe the relationship between BIA readings and estimates of energy content derived from proximate analysis. Development of BIA models for grayling will allow for rapid, precise, and non-lethal measures of individual energy density in lab or field situations. This pilot work will serve as a critical step towards future research on the biology and ecology of Arctic grayling.

Project Funding

U.S. Geological Survey Cooperative Research Units
Start Date: 0000-00-00
End Date: 0000-00-00


Publications and products

Bailey, L. T., and J. A. Falke. (2014). "Development and calibration of bioelectric impedance analysis as a measure of energetic status of Arctic grayling (Thymallus arcticus)". Alaska Chapter American Fisheries Society Meeting. October 24, 2014. Juneau, AK.


Research Team

Jeffrey Falke

Principal Investigator


  • Freshwater fish ecology and conservation biology
  • Landscape and spatial ecology of freshwater systems
  • Ecology and evolutionary biology of salmonids
  • Climate change impacts on aquatic systems
  • Impacts of introducted species on native aquatic fauna

Research Staff

Lauren Bailey