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Preliminary results from an inexpensive motion analyzer for free‐swimming zooplankton
Author(s) -
Ramcharan Charles W.,
Sprules W. Gary
Publication year - 1989
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1989.34.2.0457
Subject(s) - zooplankton , distortion (music) , motion (physics) , spectrum analyzer , software , lens (geology) , oceanography , environmental science , physics , computer science , geology , optics , computer vision , telecommunications , amplifier , bandwidth (computing) , programming language
Mirrors are used to reflect two orthogonal views of a small aquarium into the lens of a single video camera, thus creating distortion‐free, three‐dimensional images. Zooplankton motion is quantified with computer software that categorizes different zooplankton behaviors and measures parameters such as distance, duration, angle of movement, and overall swimming speed. Using this system, we have found a strong behavioral response of Diaptomus minutus to the presence of conspecifics; Diaptomus greatly increases swimming speed and frequency of jumps under moderately crowded conditions.