Heard Island Toothfish Fishery Overview
The Heard Island Toothfish Fishery operated by Austral Fisheries Pty Ltd involves longline fishing with a history dating back to the late 1990s. The fishery has seen changes in vessel types, catch quantities, and depredation issues involving sperm whales. Mitigation measures were introduced in 2013 in response to whale sightings during the fishing season, highlighting efforts towards sustainable fishing practices.
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Presentation Transcript
COLTO Depredation Workshop March 2016 Rhys Arangio Austral Fisheries Heard Island Toothfish Fishery: Background and Depredation Summary Austral Fisheries Pty Ltd | Level 4, 50 Oxford Close, West Leederville, WA, 6007 | +61 (08) 9217 0100 austral@australfisheries.com.au | australfisheries.com.au | facebook.com/australfisheries
Heard Island Toothfish Fishery Austral Fisheries Pty Ltd | Level 4, 50 Oxford Close, West Leederville, WA, 6007 | +61 (08) 9217 0100 austral@australfisheries.com.au | australfisheries.com.au | facebook.com/australfisheries
Heard Island Toothfish Fishery - History Two major quota holders - Austral Fisheries and Australian Longline 2 trawl vessels only, until 2003 Transition to longline finalised in 2014, with only minor trawl catch from RSTS and bycatch from Icefish fishery Currently 3 longliners, plus 1 dual purpose longliner-trawler 2016 TAC 3405t. Expect all longline except RSTS Heard Island Toothfish Removals 9,000 8,000 7,000 6,000 5,000 Tonnes 4,000 3,000 2,000 1,000 - 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016* IUU RSTS Trawl Longline Trap TAC
Heard Island Toothfish Fishery Depredation History Began 2011 Sperm whales only Groups of 1 to 6. Seasonal: April to July only Linked to expanding longline fleet and season? Saw 1 Killer whale in 2014, and 1 pod in 2015 no depredation noticed Whale sighting rate relatively stable Have not calculated depredation rate or quantity Kerguelen fishery so close yet bigger problem Heard Island Season length Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Trawl / Traps Core Longline Extended Longline Austral Fisheries Pty Ltd | Level 4, 50 Oxford Close, West Leederville, WA, 6007 | +61 (08) 9217 0100 austral@australfisheries.com.au | australfisheries.com.au | facebook.com/australfisheries
Heard Island Toothfish Fishery Whale sighting rate (Longline season) # LL vessels % LL catch 2 2 3 3 5 52% 50% 78% 97% 97% * *Mitigation - In 2013, industry began voluntary move on measures upon whale sightings. Austral Fisheries Pty Ltd | Level 4, 50 Oxford Close, West Leederville, WA, 6007 | +61 (08) 9217 0100 austral@australfisheries.com.au | australfisheries.com.au | facebook.com/australfisheries
Heard Island Toothfish Fishery Depredation data records Began photo ID in 2013 comparing with French ID catalogue. No matches to date. AFMA Observer records: date, spp, position, number, dep evidence Geographic mapping early results indicate possible: West to East movement from April to July? Preference for deeper slopes of plateau? What next? Listening stations to detect presence/absence? Austral Fisheries Pty Ltd | Level 4, 50 Oxford Close, West Leederville, WA, 6007 | +61 (08) 9217 0100 austral@australfisheries.com.au | australfisheries.com.au | facebook.com/australfisheries
Thank you Thanks to Dirk Welsford, Australian Antarctic Division, for summarising fishery-wide data Austral Fisheries Pty Ltd | Level 4, 50 Oxford Close, West Leederville, WA, 6007 | +61 (08) 9217 0100 austral@australfisheries.com.au | australfisheries.com.au | facebook.com/australfisheries
