SHORT COMMUNICATION THE EFFECTS OF ARTIFICIAL LIGHT ON THE DISTRIBUTION OF CATCHES OF SILVER EEL, ANGUILLA ANGUILLA (L.), ACROSS THE KILLALOE EEL WEIR IN THE

Nocturnal migrations of silver eels were investigated daily at the Killaloe eel weir in the lower River Shannon during the silver eel fishing seasons of 1992–3 and 1993–4. Variations in the catches made in a series of coghill nets fished across the weir were analysed with regard to the total daily catch and the catch at different locations across the weir. The use of artificial lighting at a navigation arch in the eel weir was shown to reduce catches in nets placed at the arch