Vol. 57, 2018 (update: 2018.03.19; 03.30) The Swimming Behavior of the Calanoid Copepod Calanus sinicus Under Different Food ConcentrationsMing-Ren Chen and Jiang-Shiou Hwang* doi:10.6620/ZS.2018.57-13
Institute of Marine Biology, National Taiwan Ocean University, Keelung, 202, Taiwan (Received 23 August 2017; Accepted 5 March
2018; Communicated by Benny K.K. Chan) Ming-Ren
Chen and Jiang-Shiou Hwang (2018) Calanus sinicus
is a calanoid copepod and dominant zooplankton species in the coastal
waters of the western North Pacific rim. We examined the effects of
different food concentrations on the swimming behavior of this species.
Adults were video-recorded at 30 frames/s using video equipment that
allowed us to follow each freely swimming individual continuously in 1L
containers (10 × 10 × 10 cm) with 30 PSU salinity filtered seawater at
20℃. Several behavioral parameters such as swimming trajectories and
speed showed distinct changes under different food conditions. The
dynamics of swimming states were assessed by the statistical properties
of their trajectories. Slow swimming was generally the dominant
behavior. Swimming path trajectory decreased at high food
concentrations and swimming path entropy decreased when the food
concentrations increased. Key words: Small-scale, Behavior, NDGR,
Entropy, Trajectory, Trophic ecology, Feeding strategy. *Correspondence: Tel: +886-935289642. Fax:
+886-2-24629464. E-mail: jshwang@mail.ntou.edu.tw |