Technologies to reduce seal-fisheries interactions and mortalities

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Citation: Stewardson, C.L. and M.W. Cawthorn, 2004. Technologies to reduce seal-fisheries interactions and mortalities. pp. 81-95 (+ Appendix pp. 96-99), In Australian Fisheries Management Authority and Bureau of Rural Sciences: Final Report of the Special SESSFEAG Meeting: Reducing Seal Interactions and Mortalities in the South East Trawl Fishery, 20-21 November 2003, Can.
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Link: http://affashop.gov.au/PdfFiles/13234_discussion_paper_bycatch_tecnnologies.pdf
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Summary:

Acoustic Harassment Devices were not found to be effective in deterring New Zealand fur seals (Arctocephalus forsteri) from mid-water trawls in the New Zealand hoki fishery.
Sea Lion Escape Devices are undergoing testing in New Zealand??˙s hoki trawl fishery (for fur seals) and the squid trawl fishery (for Hookers??˙s sea lion). Preliminary results indicate squid and fish loss via the escape hatch was minimal; in the hoki fishery, fish loss was confined to fast swimming species, including jack mackerel and warehou.
Field Studies:
Location Fishing gear Reduction technique Bycatch species Effect on bycatch species Catch Effect on target catch Type
New Zealand Trawls Acoustic harassment devices Pinnipeds Did not deter fur seals Hoki In the wild
New Zealand Trawls Excluder devices Pinnipeds Hoki Preliminary tests indicate minimial loss In the wild