Fig. 1. Schematic drawing of the image acquisition setup. A, Krypton laser; B,
optical fibre; C, optical probe; D, experimental vessel with seeded seawater
and laser light sheet; E, micromanipulator with mounted pipette; F,
desiccator; G, high-resolution video camera; H, video recorder; I,
computerized image analysis system.
Fig. 3. Velocity vector diagram of the flow around a foraging copepod. Dorsal view
(XY plane). (A) Animal in plane of focus, (B) plane of focus 0.25 mm
to the ventral side of the copepod, (C) plane of focus 0.50 mm to the ventral
side of the copepod, (D) plane of focus 0.75 mm to the ventral side of the
copepod.
Fig. 4. Velocity vector diagram of the flow around a foraging copepod. Lateral view
(XZ plane). (A) Animal in plane of focus, (B) plane of focus 0.25 mm
to the lateral side of the copepod, (C) plane of focus 0.50 mm to the lateral
side of the copepod, (D) plane of focus 0.75 mm to the lateral side of the
copepod.
Fig. 5. Colour-coded plot of vorticity field (A-D) and the discriminant of complex
eigenvalues d (E-H) around foraging copepod in parallel XZ
planes. (A,E) Animal in plane of focus; (B,F) plane of focus 0.25 mm to the
lateral side of the copepod; (C,G) plane of focus 0.50 mm to the side of the
copepod; (D,H) plane of focus 0.75 mm to the side of the copepod.
Fig. 6. Colour-coded plot of shear field around foraging copepod. (A) Dorsal view
(XY plane), animal in plane of focus; (B) lateral view (XZ
plane), animal in plane of focus; (C) lateral view 0.25 mm to the side of the
animal. Black circle indicates position of the first antenna. (D) As in C, 0.5
mm to the side of the animal, (E) as in C, 0.75 mm to the side of the animal.
The first antennae do not reach into this plane.
