| The diel activity and nocturnal movements of the American lobster, Homarus americanus, were studied using a fixed hydrophone array tracking system at Broad Cove, Conception Bay, Newfoundland. Twenty lobsters tagged with ultrasonic transmitters were monitored at various times between September, 1987 and August, 1990, providing 291 nights or tracking data of which 246 were complete (i.e. an animal was monitored for the entire period of darkness). Positional information on active lobsters was recorded every two minutes, providing both temporal and spatial information on activity and movements. It was assumed that tagging did not have a pronounced or prolonged effect on the activity or movements of subjects. (Abstract shortened by UMI.)... |
