Short-Term Movements of Young Sandbar Sharks, Carcharhinus Plumbeus (Pisces, Carcharhinidae)
Abstract:Using tethered floats on 20 sharks and ultrasonic telemetry on 3 others, the short-term movements of young Carcharhinus plumbeus were investigated in the area of Chincoteague, Virginia. The general pattern of movement was predominately in the direction of tidal current flow at a horizontal rate approximately equal to current speed. Movement not in the direction of tidal flow occurred rarely and was associated with slow current speed and the proximity of large schools of menhaden, Brevoortia tyrannus. Rate and magnitude of change in swimming direction increased during slack water periods and upon movement into areas with negligible current flow. No day-night, flood current-ebb current, sex, or size effects were found for locomotor activity. Results suggest that tidal current flow is a major factor influencing the movements of young sandbar sharks in this area.
Document Type: Research Article
Publication date: January 1, 1983
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