To glue or not to glue? Reassembling broken otoliths for population discrimination

Twenty-five Atlantic cod Gadus morhua otoliths were examined using eight shape measurements along with Fourier analysis of their outlines to test whether discrimination using otolith shape is affected by gluing broken otoliths. Small differences in seven of the eight shape measurements were found be...

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Bibliographic Details
Published in:Journal of Fish Biology
Main Authors: Bardarson, Hlynur, McAdam, Bruce James, Petursdottir, Groa, Marteinsdottir, Gudrun
Other Authors: University of Iceland, Institute of Aquaculture, Marine Research Institute (Hafrannsoknastofnunin), orcid:0000-0001-6117-2437
Format: Article in Journal/Newspaper
Language:English
Published: Wiley-Blackwell 2014
Subjects:
cluster analysis
Fourier analysis
gluing
morphology
otolith archives
shape measurements
atlantic cod
Gadus morhua
Online Access:http://hdl.handle.net/1893/20073
https://doi.org/10.1111/jfb.12390
http://dspace.stir.ac.uk/bitstream/1893/20073/1/Bardarson_et_al_2014_otolith_breaking_JOURNAL_VERSION.pdf
Description
Summary:Twenty-five Atlantic cod Gadus morhua otoliths were examined using eight shape measurements along with Fourier analysis of their outlines to test whether discrimination using otolith shape is affected by gluing broken otoliths. Small differences in seven of the eight shape measurements were found between unbroken otoliths and the same otoliths after breaking and subsequently gluing together; however, none of the Fourier descriptors differed. Cluster analyses indicated that resultant morphological differences will have no impact when applying discriminant analysis.

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