Hydrodynamically effective area for traps and nets

Abstract

Method for estimation of hydrodynamically effective area for fishing traps and nets is presented. Fish can detect hydrodynamic excessive pressure and water flow turbulence on the distance that depends on its lateral line sensitivity and swiftness of perception, but also on the flow velocity, drag resistance of fishing gear, fit coefficients for its covering, and type of the covering. The latter dependencies are considered. Algorithm for calculation of the effective area for flat netting gears is derived.

Keywords

• hydrodynamic pressure
• flow velocity
• hydrodynamic field
• field of food bait
• netting gear