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Acoustic pingers, Fumunda F3 (2.7 kHz) for humpback whales and F10 (10 kHz) for dolphins, were used on sharks nets within the Queensland Shark Control Program.  Sound from the acoustic pingers was present for around 1.5 km beyond the nets. Humpback whales and dugons were able to hear the F3 pinger 90 m from the net and its two harmonic overtones (5.4 and 8.1 kHz) 10 and 210 m from the net respectively. The F10 pinger was audible to both species up to 130 m from the net. Dolphins could hear the F3 pinger 45 m from the net and it's two overtones 10 and 110 m from the net.

A study was conduceted to test the effect of SaveWave acoustic deterrent devices on target fish catch and bottlenose dolphins in the North Carolina Spanish mackerel gillnet fishery. Observations were carried out on commercial vessels and focal visual and acoustic follows of dolphins were conducted. Fish catches were significantly lower when dolphins were observed interacting with gillnets. The SaveWave device did not affect fish catch. Dolphins were less likely to interact with gillnets and more likely to echolocate when SaveWaves were present.

Gear modifications to the Loligo squid trawl net were developed to reduce scup bycatch.  Two extension modifications, vee and ring excluders, were developed to aid in reducing scup bycatch when large schools are encountered.  These extensions were based on the grid/gate design but made flexible enough to be wound up. The extensions work as an obstruction device and are flanked by fisheyes, which allow the fish to escape.  Previous trawl net modifications were unable to reduce scup bycatch when large schools entered the gear.