CAN ROACH (RUTILUS RUTILUS (L.)) BE DEFLECTED BY MEANS OF A FLUORESCENT LIGHT?

摘要

In response to the large number of fish which encroach on power stations, or are damaged at water turbines, an urgent need exists for the development of fish deflection methods to minimise the negative effects of cooling water extraction on fish populations. Behavioural barriers are relatively cheap and easy to install. However, the reaction of fish to such barriers is often species-dependent and they are therefore not always applicable or useful. As a method of nocturnal fish deflection, artificial light sources above or under water show most promise. Roach (Rutilus rutilus) are common fish in temperate fresh waters and large numbers of juveniles encroach upon Power stations during spring and autumn.