Squid behavior was assessed using seven visual traits, namely: 1) position of squid around the visual field of the camera, 2) vertical distance from the camera (altitude), 3) posture-pitch, 4) posture-yaw, 5) color patterns, 6) escape reaction, and 7) swimming mode.
The last two attributes, escape reaction and swimming mode, were analyzed directly in the extracted video segments, which were repeatedly observed to a) classify the type of escape reaction (see results), b) record swimming time in front of the camera (in seconds), and c) record the frequency of flaps of the tail fin.
argentinus may exhibit such high speeds as an emergency escape reaction, and therefore sustains it only for a short period.
include running hard and then burrowing into the thickest, darkest bush available--and bears often live in wet, steep, densely foliaged thickets where visibility is nil.
Dr Bates said: "With any scent of Masai present, fear and escape reactions
seem to dominate anything else."
It may be presumed to have similar giant fibers involved in escape reactions elsewhere in its nervous system, as do other copepods (Lowe, 1935; Park, 1966; Lenz et al., 2000).
This calls into question the same central motor pattern generator being involved in both escape reactions. An increase in response vigor at the highest stimulus intensity was found in the present studies, but was not clearly apparent in our earlier work on mechanically evoked escape (Buskey et al., 2002).
Escape reactions of zooplankton: avoidance of a pursuing siphon tube.
of zooplankton: effects of light and turbulence.