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 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.
Institute of Life and Environmental Sciences, University of Iceland, Sturlugata 7, 101, Reykjavík, Iceland.
H
H
Bardarson
B J
BJ
McAdam
G
G
Petursdottir
G
G
Marteinsdottir
D000269:Adhesives; D000818:Animals; D016000:Cluster Analysis; D016002:Discriminant Analysis; D005583:Fourier Analysis; D048389:Gadus morhua / Q000033:anatomy & histology*; D010037:Otolithic Membrane / Q000033:anatomy & histology*
D000269:Adhesives
Fourier analysis; cluster analysis; gluing; morphology; otolith archives; shape measurements