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A novel method for the age estimation of Saddletail snapper (Lutjanus malabaricus) using Fourier Transform-near infrared (FT-NIR) spectroscopy

Wedding, B. B. and Forrest, A. J. and Wright, C. and Grauf, S. and Exley, P. and Poole, S. E. (2014) A novel method for the age estimation of Saddletail snapper (Lutjanus malabaricus) using Fourier Transform-near infrared (FT-NIR) spectroscopy. Marine and Freshwater Research, 65 (10). pp. 894-900.

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Article Link(s): http://dx.doi.org/10.1071/MF13244

Abstract

Near infrared (NIR) spectroscopy was investigated as a potential rapid method of estimating fish age from whole otoliths of Saddletail snapper (Lutjanus malabaricus). Whole otoliths from 209 Saddletail snapper were extracted and the NIR spectral characteristics were acquired over a spectral range of 800–2780 nm. Partial least-squares models (PLS) were developed from the diffuse reflectance spectra and reference-validated age estimates (based on traditional sectioned otolith increments) to predict age for independent otolith samples. Predictive models developed for a specific season and geographical location performed poorly against a different season and geographical location. However, overall PLS regression statistics for predicting a combined population incorporating both geographic location and season variables were: coefficient of determination (R2) = 0.94, root mean square error of prediction (RMSEP) = 1.54 for age estimation, indicating that Saddletail age could be predicted within 1.5 increment counts. This level of accuracy suggests the method warrants further development for Saddletail snapper and may have potential for other fish species. A rapid method of fish age estimation could have the potential to reduce greatly both costs of time and materials in the assessment and management of commercial fisheries.

Item Type:Article
Business groups:Crop and Food Science
Keywords:Arafura Sea, fish ageing, otolith increments, saddletail snapper.
Subjects:Technology > Technology (General) > Spectroscopy > NIR (Near Infrared)
Aquaculture and Fisheries > Fisheries > Fishery research
Deposited On:21 Jan 2015 05:19
Last Modified:03 Feb 2015 05:52

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