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JPR Advance Access published online on November 22, 2004
Journal of Plankton Research, doi:10.1093/plankt/fbh157
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Received June 11, 2004
Accepted October 29, 2004

Short communication

Application of autonomous underwater vehicle and image analysis for detecting the 3D distribution of freshwater red-tide Uroglena americana (Chrysophyceae)

Kanako Ishikawa 1*, Michio Kumagai 1, and Ross F. Walker 2

1 Lake Biwa Research Institute, 1-10 Uchidehama, Otsu 520-0806, Japan
2 Faculty of Information Science and Engineering, Ritsumeikan University, Kusatsu, Japan

* To whom correspondence should be addressed.
Kanako Ishikawa, E-mail: ishikawa{at}lbri.go.jp


  Abstract

The spatial structure of Uroglena americana was detected using an AUV equipped with a submersible microscope, video recording system and water quality monitoring sensors. U. 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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