Rapid and reliable multivariate discrimination for two cryptic Eteline snappers using otolith morphometry

C.B. Wakefield; A.J. Williams; S.J. Newman; M. Bunel; C.E. Dowling; C.A. Armstrong; T.J. Langlois

doi:10.1016/j.fishres.2013.10.011

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Rapid and reliable multivariate discrimination for two cryptic Eteline snappers using otolith morphometry

Journal article

Peer reviewed

Rapid and reliable multivariate discrimination for two cryptic Eteline snappers using otolith morphometry

C.B. Wakefield, A.J. Williams, S.J. Newman, M. Bunel, C.E. Dowling, C.A. Armstrong and T.J. Langlois

Fisheries Research, Vol.151, pp.100-106

2014

DOI: https://doi.org/10.1016/j.fishres.2013.10.011

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Abstract

Previously unaccounted cryptic speciation requires revaluating species identification, particularly for fisheries assessment purposes. We describe a rapid and reliable method for distinguishing between phenotypically similar species that utilizes simple otolith morphometry (length, width, thickness and weight) with or without fish length, within a traditional canonical discriminant analysis (CDA). Data were subject to CDA in order to differentiate between the cryptic Etelis carbunculus (ruby snapper) and E. marshi (pygmy ruby snapper). A very high allocation success rate was achieved using otolith morphometry and fork length (99.6% for E. carbunculus and 100% for E. marshi) or otolith morphometry only (98.8% for E. carbunculus and 100% for E. marshi), which indicated the high discriminatory power of this method. The CDA successfully grouped samples of the same species collected from different locations in the eastern central Indian and South Pacific Oceans, indicating the robustness of this technique to discriminate between species, irrespective of their geographic range. This technique can be applied to archived otolith collections to confirm teleost species identification, and likely has broader applications for species identification involving extractive, diet or video-based studies.

Details

Title: Rapid and reliable multivariate discrimination for two cryptic Eteline snappers using otolith morphometry
Authors/Creators: C.B. Wakefield (Author/Creator) - Government of Western Australia
A.J. Williams (Author/Creator) - Pacific Community
S.J. Newman (Author/Creator) - Government of Western Australia
M. Bunel (Author/Creator) - Pacific Community
C.E. Dowling (Author/Creator) - Government of Western Australia
C.A. Armstrong (Author/Creator) - Curtin University
T.J. Langlois (Author/Creator) - The University of Western Australia
Publication Details: Fisheries Research, Vol.151, pp.100-106
Publisher: Elsevier BV
Identifiers: 991005544426207891
Copyright: © 2014 Elsevier B.V.
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.2 Marine Biology; 3.2.92 Fisheries Ecology
Web Of Science research areas: Fisheries
ESI research areas: Plant & Animal Science