title: Use of a gyroscope/accelerometer data logger to identify alternative feeding behaviours in fish.
abstract: We examined whether we could identify the feeding behaviours of the trophic generalist fish Epinephelus ongus on different prey types (crabs and fish) using a data logger that incorporated a three-axis gyroscope and a three-axis accelerometer. Feeding behaviours and other burst behaviours, including escape responses, intraspecific interactions and routine movements, were recorded from six E. ongus individuals using data loggers sampling at 200 Hz, and were validated by simultaneously recorded video images. For each data-logger record, we extracted 5 s of data when any of the three-axis accelerations exceeded absolute 2.0 g, to capture all feeding behaviours and other burst behaviours. Each feeding behaviour was then identified using a combination of parameters that were derived from the extracted data. Using decision trees with the parameters, high true identification rates (87.5% for both feeding behaviours) with low false identification rates (5% for crab-eating and 6.3% for fish-eating) were achieved for both feeding behaviours.
authors.affiliation: Institute for East China Sea Research, Nagasaki University, Taira-machi, Nagasaki 851-2213, Japan yuuki-k@nagasaki-u.ac.jp.
authors.forename: Yuuki
authors.initials: Y
authors.lastname: Kawabata
authors.affiliation: Graduate School of Informatics, Kyoto University, Yoshidahonmachi, Kyoto 606-8501, Japan.
authors.forename: Takuji
authors.initials: T
authors.lastname: Noda
authors.affiliation: Institute for East China Sea Research, Nagasaki University, Taira-machi, Nagasaki 851-2213, Japan.
authors.forename: Yuuki
authors.initials: Y
authors.lastname: Nakashima
authors.affiliation: Research Center for Sub-tropical Fisheries, Seikai National Fisheries Research Institute, Fisheries Research Agency, Fukai-Ota, Ishigaki 907-0451, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nanami
authors.affiliation: Research Center for Sub-tropical Fisheries, Seikai National Fisheries Research Institute, Fisheries Research Agency, Fukai-Ota, Ishigaki 907-0451, Japan.
authors.forename: Taku
authors.initials: T
authors.lastname: Sato
authors.affiliation: Research Center for Sub-tropical Fisheries, Seikai National Fisheries Research Institute, Fisheries Research Agency, Fukai-Ota, Ishigaki 907-0451, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Takebe
authors.affiliation: Graduate School of Informatics, Kyoto University, Yoshidahonmachi, Kyoto 606-8501, Japan.
authors.forename: Hiromichi
authors.initials: H
authors.lastname: Mitamura
authors.affiliation: Graduate School of Informatics, Kyoto University, Yoshidahonmachi, Kyoto 606-8501, Japan.
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Arai
authors.affiliation: Institute for East China Sea Research, Nagasaki University, Taira-machi, Nagasaki 851-2213, Japan Research Center for Sub-tropical Fisheries, Seikai National Fisheries Research Institute, Fisheries Research Agency, Fukai-Ota, Ishigaki 907-0451, Japan.
authors.forename: Tomofumi
authors.initials: T
authors.lastname: Yamaguchi
authors.affiliation: Institute for East China Sea Research, Nagasaki University, Taira-machi, Nagasaki 851-2213, Japan.
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Soyano
mesh_terms: D061725:Accelerometry / Q000295:instrumentation* / Q000379:methods*; D000818:Animals; D009043:Motor Activity / Q000502:physiology; D010473:Perciformes / Q000502:physiology*; D011235:Predatory Behavior / Q000502:physiology*; D013686:Telemetry
keywords: Accelerometer; Angular velocity; Biologging; Forage; Inertial sensor; Telemetry