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A transformative approach to ageing fish otoliths using Fourier transform near infrared spectroscopy: a case study of eastern Bering Sea walleye pollock (Gadus chalcogrammus)
- Source :
- Canadian Journal of Fisheries and Aquatic Sciences. 76:780-789
- Publication Year :
- 2019
- Publisher :
- Canadian Science Publishing, 2019.
-
Abstract
- We investigated the use of Fourier transform near infrared spectroscopy (FT-NIRS), which is a method of measuring light absorbance signatures, to derive ages from eastern Bering Sea walleye pollock (Gadus chalcogrammus) otoliths. This approach is based on a predictive model between near infrared spectra in the otolith and fish age, which is calibrated and validated. The advantage of FT-NIRS over traditional methods is the speed and repeatability with which age estimates are generated. The application of FT-NIRS to walleye pollock otoliths yielded r2 values between 0.91 and 0.95 for the calibration models and good validation performance (between 0.82 and 0.93). This approach can be expected to predict fish age within ±1.0 year of age 67% of the time. When comparing approaches, the FT-NIRS had as good or slightly better precision (75% agreement) than the traditional ageing (66% agreement) and showed little or no bias at age before 12 years of age. Once the predictive FT-NIR model is calibrated and validated, age estimates using FT-NIRS can be done at 10 times the rate compared to traditional methods.
- Subjects :
- 0106 biological sciences
Light absorbance
biology
010604 marine biology & hydrobiology
Near-infrared spectroscopy
04 agricultural and veterinary sciences
Aquatic Science
biology.organism_classification
01 natural sciences
Pollock
symbols.namesake
Fourier transform
Oceanography
040102 fisheries
symbols
0401 agriculture, forestry, and fisheries
Environmental science
Fish
Gadus chalcogrammus
Ecology, Evolution, Behavior and Systematics
Subjects
Details
- ISSN :
- 12057533 and 0706652X
- Volume :
- 76
- Database :
- OpenAIRE
- Journal :
- Canadian Journal of Fisheries and Aquatic Sciences
- Accession number :
- edsair.doi...........a2458e87deab25dc53682ac68bf4bf75
- Full Text :
- https://doi.org/10.1139/cjfas-2018-0112