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Government of Western Australia - Department of Fisheries
Tuesday 26 April 2022

Shark depredation science update

Recent studies into shark depredation have been published in our Shark depredation science update.

Shark depredation (or bite-offs) occur when a shark partially or completely consumes a fisher’s catch before it can be brought on deck.

Recreational, charter and commercial fishers in WA are reporting significant increases in shark depredation, particularly in the Gascoyne and Pilbara.

Our researchers have participated in a number of studies to better understand and address shark depredation. Some recent findings include:

  • the probability of sharks taking fish is reduced by 65 per cent when using deterrents (electronic, magnetic, acoustic were tested);
  • sharks arrive within 15-30 minutes of fishing commencing, so moving spots helps decrease bite-offs; and
  • depredation rates are higher in areas where more people are fishing, for example, close to boat ramps.

Developing measures against shark bite-offs is complex, and there is no easy solution. Check out the update​ to find out more.​

Last modified: 26/04/2022 6:33 PM

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