Rapid and reliable assessment of fish physiological condition for fisheries research and management using Fourier transform near-infrared spectroscopy

Details

• Journal Title:
  Frontiers in Marine Science
• Personal Author:
  Goldstein, Esther D. ; Helser, Thomas E. ; Vollenweider, Johanna J. ; Sreenivasan, Ashwin ; Sewall, Fletcher F.
• NOAA Program & Office:
  NMFS (National Marine Fisheries Service) ; AFSC (Alaska Fisheries Science Center)
• Description:
  Measuring fish population responses to climate change requires timely ecological information, warranting innovative approaches to data collection in fisheries research and management. Fourier transform near-infrared (FT-NIR) spectroscopy is a promising tool to efficiently and cost-effectively obtain multiple types of fisheries data including fish physiological health and energetics that can provide indicators of stock status and environmental change. We tested the applicability of FT-NIR spectroscopy to determine fish physiological state and condition by developing calibration models for morphometric indices of body condition [Fulton’s K and hepatosomatic index (HSI)], biochemical measurements of tissue composition (lipid content and energy density), and a nucleic acid-based index of recent growth (RNA:DNA) of juvenile Pacific cod (Gadus macrocephalus). Calibration models had the best predictive ability for lipid content followed by HSI and energy density, whereas spectral data had weak relationships with Fulton’s K and RNA:DNA. For lipid content, energy density, and HSI, informative spectral regions were primarily associated with carbon-hydrogen bonds in lipid molecules. Additionally, FT-NIR spectroscopy calibration models better predicted lipid content than morphometric measurements that are often used as proxies for measuring energy reserves, indicating that FT-NIR spectroscopy might serve as a more informative index of body condition and energy stores than other rapid methods. Efficient sample analysis by FT-NIR spectroscopy can supplement traditional metrics of body condition and be especially useful for ensuring the availability of monitoring data in support of fisheries research and management.
• Source:
  Front. Mar. Sci. 8:690934
• DOI:
  https://doi.org/10.3389/fmars.2021.690934
• Document Type:
  Journal Article
• Rights Information:
  CC BY
• Compliance:
  Submitted
• Main Document Checksum:
  urn:sha256:7c774c4caa46631c832e84a5d9046daaf4b26a919978d8305e7f85ec37dbbd09
• Download URL:
  https://repository.library.noaa.gov/view/noaa/44344/noaa_44344_DS1.pdf
• File Type:
  [PDF - 15.26 MB ]