Scheme of the count method using the Distance Sampling method.

Abstract

<p>IL = imaginary line. X^1-2 = perpendicular distances of solitary individuals to the transect line. X³ = perpendicular distance of a school of fishes to the perpendicular line. The equipment (Fig 2) is illustrated above divers, like at the surface. Inset: The Tracked Roaming Transect equipment. A = Waterproof case for GPS. B = Body Board Slate. C = Diving reel. D = Weight.</p