Development and calibration of bioelectrical impedance analysis as a measure of energetic status of Arctic grayling (Thymallus arcticus)
August 2012 - July 2015
- Cooperative Research Units
The energetic status of fishes represents energy stored as protein and lipids and reflects the ability of an individual to reproduce, migrate, and transition through life stages, ultimately influencing survival. However, traditional measurement methods, while highly accurate, are time consuming, expensive, and lethal, and nonlethal methods such as condition factor may not adequately characterize energetic status. Development of non-lethal but precise methods, such as biolelectrical impedance analysis (BIA), to estimate Arctic grayling body condition, as well as baseline data on variation in condition across populations in interior Alaska, is needed. This project was a collaboration between the University of Alaska Fairbanks and USGS. We found the BIA approach to provide rapid, precise, and non-lethal estimates of Arctic grayling body condition, and that fish condition varied by sex, season, and the presence of spawning Pacific salmon across interior Alaska river basins. Such an approach may be useful for future work to characterize Arctic grayling bioenergetics and monitor fish condition under a rapidly changing Arctic environment.
|Research Publications||Publication Date|
|Falke, J.A., Bailey, L.T., Fraley, K.M., Lunde, M.J., and A.D. Gryska. 2019. Energetic status and bioelectrical impedance modeling of Arctic grayling Thymallus arcticus in interior Alaska rivers. Environmental Biology of Fishes. https://doi.org/10.1007/s10641-019-00910-6||September 2019|
|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.||October 2014|
|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.||October 2013|