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Dynamical analysis reveals individuality of locomotion in goldfish
Journal article   Open access   Peer reviewed

Dynamical analysis reveals individuality of locomotion in goldfish

H Neumeister, C J Cellucci, P E Rapp, H Korn and D S Faber
Journal of experimental biology, v 207(Pt 4), pp 697-708
Feb 2004
DOI: https://doi.org/10.1242/jeb.00811
PMID: 14718512
url
http://jeb.biologists.org/content/jexbio/207/4/697.full.pdfView
Published, Version of Record (VoR) Open
url
https://doi.org/10.1242/jeb.00811View
Published, Version of Record (VoR) Open

Abstract

Animals Biomechanical Phenomena Discriminant Analysis Goldfish - physiology Individuality Swimming - physiology
Goldfish swimming was analysed quantitatively to determine if it exhibits distinctive individual spatio-temporal patterns. Due to the inherent variability in fish locomotion, this hypothesis was tested using five nonlinear measures, complemented by mean velocity. A library was constructed of 75 trajectories, each of 5 min duration, acquired from five fish swimming in a constant and relatively homogeneous environment. Three nonlinear measures, the 'characteristic fractal dimension' and 'Richardson dimension', both quantifying the degree to which a trajectory departs from a straight line, and 'relative dispersion', characterizing the variance as a function of the duration, have coefficients of variation less than 7%, in contrast to mean velocity (30%). A discriminant analysis, or classification system, based on all six measures revealed that trajectories are indeed highly individualistic, with the probability that any two trajectories generated from different fish are equivalent being less than 1%. That is, the combination of these measures allows a given trajectory to be assigned to its source with a high degree of confidence. The Richardson dimension and the 'Hurst exponent', which quantifies persistence, were the most effective measures.

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Domestic collaboration
International collaboration
Web of Science research areas
Biology
Zoology
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