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JPR Advance Access originally published online on November 22, 2004
Journal of Plankton Research 2005 27(1):129-134; doi:10.1093/plankt/fbh157
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Journal of Plankton Research Vol. 27 No. 1 © Oxford University Press 2004; all rights reserved

SHORT COMMUNICATION

Application of autonomous underwater vehicle and image analysis for detecting the three-dimensional distribution of freshwater red tide Uroglena americana (Chrysophyceae)

Kanako Ishikawa1,*, Michio Kumagai1 and Ross F. Walker2

1 Lake Biwa Research Institute, 1-10 Uchidehama, OTSU 520-0806, Japan and 2 Ritsumeikan University, Kusatsu, Japan

* Corresponding Author: ishikawa{at}lbri.go.jp

Received June 11, 2004; accepted in principle September 17, 2004; accepted for publication October 29, 2004; published online 22 November, 2004

The spatial structure of Uroglena americana was detected using an autonomous underwater vehicle equipped with a submersible microscope, video recording system and water quality monitoring sensors. Uroglena americana colonies were enumerated via image analysis and pattern recognition methods. This quantitative technique is useful for understanding plankton assemblages, distributions and their potential to become nuisance algal blooms.


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