Novel method for shark age estimation using near infrared spectroscopy

Rigby, C.L., Wedding, B.B., Grauf, S., and Simpfendorfer, C.A. (2016) Novel method for shark age estimation using near infrared spectroscopy. Marine and Freshwater Research, 67 (5). pp. 537-545.

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Abstract

Accurate age determination is an important component of assessing and managing fish populations, yet traditional ageing using growth bands is time-consuming and has limitations. In the present study, an alternative approach to shark age estimation using near infrared spectroscopy (NIRS) was investigated using two species. The ages of Sphyrna mokarran and Carcharhinus sorrah vertebrae that had been traditionally aged and validated were successfully predicted up to 10 years of age using NIRS. The correlations between the known ages of the vertebrae and their near infrared spectra were strong, with R2 values of 0.89 and 0.84 for S. mokarran and C. sorrah respectively. The major advantage of the NIRS ageing approach was the rapid speed of age estimation, which could enable large numbers of sharks to be aged quickly. This would offer the fisheries management benefit of improving the reliability of age information for stock and risk assessments.

Item ID: 43457
Item Type: Article (Research - C1)
ISSN: 1448-6059
Keywords: Carcharhinus sorrah, Sphyrna mokarran, vertebrae
Funders: Australian Postgraduate Award, Oceania Chondrichthyan Society Passions of Paradise Student Research Award
Date Deposited: 16 May 2016 22:58
FoR Codes: 06 BIOLOGICAL SCIENCES > 0608 Zoology > 060809 Vertebrate Biology @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 100%
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