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JPR Advance Access published online on January 23, 2008
Journal of Plankton Research, doi:10.1093/plankt/fbm108
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© The Author 2008. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

A rapid analysis of copepod feeding using FlowCAM

Keiichiro Ide*, Kazutaka Takahashi, Akira Kuwata, Miwa Nakamachi and Hiroaki Saito

Tohoku National Fisheries Research Institute, Fisheries Research Agency, 3-27-5 Shinhama-cho, Shiogama, Miyagi 985-0001, Japan

* Corresponding author: keiichir{at}affrc.go.jp

Received on November 4, 2007; revised on November 29, 2007; accepted on December 3, 2007


  Abstract

This study addressed the usefulness and reliability of using a new plankton image analyzer, FlowCAM, for rapid analysis of copepod feeding by comparison with the conventional microscopic analysis. We carried out bottle incubation experiments with two copepod species in the Oyashio region, and analyzed the prey abundance prior to and after the incubation with a FlowCAM. From the volume-specific fluorescence intensity of particles, the FlowCAM successfully distinguished between zooplankton and phytoplankton, and allowed an adequate evaluation of the copepod feeding on zooplankton and phytoplankton. The analysis time for one plankton sample was about 10 minutes, which was <1/10 of the time required for microscopic enumeration. The FlowCAM is considered to be an efficient tool for rapid analysis of copepod feeding particularly in studies of omnivory.

Key Words: feeding • zooplankton • omnivorous • Neocalanus cristatus • Metridia pacifica

Communicating Editor: R.P. Harris


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