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Development and calibration of bioelectrical impedance analysis as a measure of energetic status of arctic grayling (Thymallus arcticus)

Duration

August 2012 - July 2015

Narrative

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. Funding: U.S. Geological Survey Cooperative Units Program.

Research Products and Activities

Presentations

  • Fraley, K. M., Lunde, M. J., Bailey, L. T., Falke, J. A., and A. D. Gryska. 2013. Bioelectrical impedance analysis as a measure of energy density in arctic grayling (Thymallus arcticus). Alaska Chapter American Fisheries Society Annual Meeting, Fairbanks, AK, 7-11 October 2013.
  • 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 Annual Meeting, Juneau, Alaska, 21-24 October 2014.
 

Current Staff

Federal Staff: 102

Masters Students: 247

Phd Students: 163

Post Docs: 55

University Staff: 266

5 Year Summary

Students graduated: 722

Scientific Publications: 1960

Presentations: 4355

 

Personnel

Funding Agencies

  • Cooperative Research Units

Links

Cooperative Research Units Program Headquarters Cooperators