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Dealing with marine mammal bycatch in small pelagic fisheries: case studies from Australia


Lyle, J and Ward, T, Dealing with marine mammal bycatch in small pelagic fisheries: case studies from Australia, Abstracts from the 144th American Fisheries Society Meeting, 17-21 August 2014, Quebec, Canada, pp. 1. (2014) [Conference Extract]

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Concern over interactions between marine mammals and fishing operations in Australia’s major small pelagic fisheries have not only focussed public attention on the issue but have significant implications for their management and future development. Two case studies are discussed; an established purse seine fishery and a developing mid-water trawl fishery. In the South Australian Sardine Fishery encirclement and mortality of dolphins in purse seine nets has been addressed through an industry code of practice that, since its introduction, has seen the number of dolphin mortalities fall by about 97%. In the Commonwealth Small Pelagic Fishery efforts to reduce bycatch of dolphins and seals in mid-water trawls have involved a voluntary CoP and use of exclusion grids. Monitoring by trawl-mounted underwater video cameras has established that a three-fold reduction in lethal interactions was achieved by simply enlarging the size of the escape hole. Nonetheless, mortality rates associated with mid-water trawling remain high by comparison with other Australian trawl fisheries and concern over marine mammal bycatch was a major contributing factor in justifying a moratorium being placed on factory trawler operations. Addressing this issue represents a major challenge for industry if the fishery is to be allowed to develop.

Item Details

Item Type:Conference Extract
Keywords:marine mammal bycatch, small pelagic fisheries
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Fisheries sciences not elsewhere classified
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Fisheries - wild caught not elsewhere classified
UTAS Author:Lyle, J (Associate Professor Jeremy Lyle)
ID Code:99428
Year Published:2014
Deposited By:IMAS Research and Education Centre
Deposited On:2015-03-24
Last Modified:2015-03-24

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