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Scanning for PIT-tagged flatfish in a coastal area using a sledge equipped with an RFID antenna
C R Sparrevohn1, K Aarestrup, C Stenberg
1Technical University of Denmark, National Institute of Aquatic Resources, Charlottenlund Castle, Jaegersborg Allé 1, DK-2920 Charlottenlund, Denmark; Danish Pelagic Producers Organisation, H.C. Andersens Boulevard 37, DK-1553 Copenhagen V, Denmark.
Abstract:
A radio frequency identification (RFID) antenna system, build into a sledge that can be towed behind a vessel like a trawl and thereby has the potential to detect the position of a passive inductor technology (PIT)-tagged fish in a wide variety of habitats, is presented. By scanning for hatchery-reared PIT-tagged turbot Psetta maxima released into a natural habitat, the performance of the system was compared to a standard juvenile trawl and results suggested that the efficiency of the sledge was five times that of the trawl, which in absolute values corresponds to 75% of P. maxima lying in the pathway of the sledge.
