Aging Pacific cod (Gadus macrocephalus) from otoliths using Fourier‐transformed near‐infrared spectroscopy
Abstract For decades, age‐structured stock assessments have been a key component to managing fishery resources worldwide. Fisheries management systems have been under increasing demand to generate a greater volume and quality of age estimates. Traditional aging techniques, which require physical pre...
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ftdoajarticles:oai:doaj.org/article:40527a38154a41d9a988776a5c04f666 2023-05-15T15:43:57+02:00 Aging Pacific cod (Gadus macrocephalus) from otoliths using Fourier‐transformed near‐infrared spectroscopy Jordan Healy Thomas E. Helser Irina M. Benson Luke Tornabene 2021-08-01T00:00:00Z https://doi.org/10.1002/ecs2.3697 https://doaj.org/article/40527a38154a41d9a988776a5c04f666 EN eng Wiley https://doi.org/10.1002/ecs2.3697 https://doaj.org/toc/2150-8925 2150-8925 doi:10.1002/ecs2.3697 https://doaj.org/article/40527a38154a41d9a988776a5c04f666 Ecosphere, Vol 12, Iss 8, Pp n/a-n/a (2021) age estimation chemometrics fisheries management near‐infrared spectroscopy Pacific cod partial least squares regression Ecology QH540-549.5 article 2021 ftdoajarticles https://doi.org/10.1002/ecs2.3697 2022-12-31T07:16:29Z Abstract For decades, age‐structured stock assessments have been a key component to managing fishery resources worldwide. Fisheries management systems have been under increasing demand to generate a greater volume and quality of age estimates. Traditional aging techniques, which require physical preparation followed by microscopic examination of fish otoliths, are labor‐intensive, expensive, and inherently subjective among individual analysts, making repeatability and precision a challenge. Here we investigated an innovative approach to aging fish from their otoliths using Fourier‐transformed near‐infrared spectroscopy and partial least squares regression models. Models were fit to and validated on spectra and used to microscopically estimate ages of Pacific cod from three years of fishery‐independent otolith data out of the Bering sea. Calibrated and validated models for each year, as well as on an ensemble of the three years, yielded high precision for the multiyear model (R2 = 0.869, RMSE = 0.614, PA = 63%, CV = 7.412), and independent year models (R2 = 0.844–0.891, RMSE = 0.555–0.615, PA = 65%, CV = 6.313–6.775). These metrics of model performance were highly comparable to precision from the traditional microscopic aging approach (R2 = 0.763–0.869, RMSE = 0.639–0.737, PA = 63%–70%, CV = 5.671–6.698). In all cases, a two‐sided Kolmogorov–Smirnov test showed no significant difference between reference and model estimated age distributions. Our results illustrate how Fourier‐transformed near‐infrared spectroscopy can be utilized on otoliths to predict age estimates with substantially greater efficiency, good precision, high repeatability, and no loss in data integrity compared to the traditional microscopic method for aging Pacific cod. Article in Journal/Newspaper Bering Sea Directory of Open Access Journals: DOAJ Articles Bering Sea Pacific Ecosphere 12 8 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
age estimation chemometrics fisheries management near‐infrared spectroscopy Pacific cod partial least squares regression Ecology QH540-549.5 |
spellingShingle |
age estimation chemometrics fisheries management near‐infrared spectroscopy Pacific cod partial least squares regression Ecology QH540-549.5 Jordan Healy Thomas E. Helser Irina M. Benson Luke Tornabene Aging Pacific cod (Gadus macrocephalus) from otoliths using Fourier‐transformed near‐infrared spectroscopy |
topic_facet |
age estimation chemometrics fisheries management near‐infrared spectroscopy Pacific cod partial least squares regression Ecology QH540-549.5 |
description |
Abstract For decades, age‐structured stock assessments have been a key component to managing fishery resources worldwide. Fisheries management systems have been under increasing demand to generate a greater volume and quality of age estimates. Traditional aging techniques, which require physical preparation followed by microscopic examination of fish otoliths, are labor‐intensive, expensive, and inherently subjective among individual analysts, making repeatability and precision a challenge. Here we investigated an innovative approach to aging fish from their otoliths using Fourier‐transformed near‐infrared spectroscopy and partial least squares regression models. Models were fit to and validated on spectra and used to microscopically estimate ages of Pacific cod from three years of fishery‐independent otolith data out of the Bering sea. Calibrated and validated models for each year, as well as on an ensemble of the three years, yielded high precision for the multiyear model (R2 = 0.869, RMSE = 0.614, PA = 63%, CV = 7.412), and independent year models (R2 = 0.844–0.891, RMSE = 0.555–0.615, PA = 65%, CV = 6.313–6.775). These metrics of model performance were highly comparable to precision from the traditional microscopic aging approach (R2 = 0.763–0.869, RMSE = 0.639–0.737, PA = 63%–70%, CV = 5.671–6.698). In all cases, a two‐sided Kolmogorov–Smirnov test showed no significant difference between reference and model estimated age distributions. Our results illustrate how Fourier‐transformed near‐infrared spectroscopy can be utilized on otoliths to predict age estimates with substantially greater efficiency, good precision, high repeatability, and no loss in data integrity compared to the traditional microscopic method for aging Pacific cod. |
format |
Article in Journal/Newspaper |
author |
Jordan Healy Thomas E. Helser Irina M. Benson Luke Tornabene |
author_facet |
Jordan Healy Thomas E. Helser Irina M. Benson Luke Tornabene |
author_sort |
Jordan Healy |
title |
Aging Pacific cod (Gadus macrocephalus) from otoliths using Fourier‐transformed near‐infrared spectroscopy |
title_short |
Aging Pacific cod (Gadus macrocephalus) from otoliths using Fourier‐transformed near‐infrared spectroscopy |
title_full |
Aging Pacific cod (Gadus macrocephalus) from otoliths using Fourier‐transformed near‐infrared spectroscopy |
title_fullStr |
Aging Pacific cod (Gadus macrocephalus) from otoliths using Fourier‐transformed near‐infrared spectroscopy |
title_full_unstemmed |
Aging Pacific cod (Gadus macrocephalus) from otoliths using Fourier‐transformed near‐infrared spectroscopy |
title_sort |
aging pacific cod (gadus macrocephalus) from otoliths using fourier‐transformed near‐infrared spectroscopy |
publisher |
Wiley |
publishDate |
2021 |
url |
https://doi.org/10.1002/ecs2.3697 https://doaj.org/article/40527a38154a41d9a988776a5c04f666 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
Ecosphere, Vol 12, Iss 8, Pp n/a-n/a (2021) |
op_relation |
https://doi.org/10.1002/ecs2.3697 https://doaj.org/toc/2150-8925 2150-8925 doi:10.1002/ecs2.3697 https://doaj.org/article/40527a38154a41d9a988776a5c04f666 |
op_doi |
https://doi.org/10.1002/ecs2.3697 |
container_title |
Ecosphere |
container_volume |
12 |
container_issue |
8 |
_version_ |
1766378159979102208 |