SLIDE 1
Outline
- Background
– Greenland Halibut – Current fisheries, global and Canadian – Working assumptions (connectivity, habitat use)
- Ongoing telemetry research
- Incorporation into fishery management
I WONDER WHERE THAT FISH HAS GONE; APPLICATION OF ACOUSTIC - - PowerPoint PPT Presentation
I WONDER WHERE THAT FISH HAS GONE; APPLICATION OF ACOUSTIC - - PowerPoint PPT Presentation
I WONDER WHERE THAT FISH HAS GONE; APPLICATION OF ACOUSTIC TELEMETRY TO GREENLAND HALIBUT ( REINHARDTIUS HIPPOGLOSSOIDES ) FISHERY MANAGEMENT Kevin J. Hedges, Nigel E. Hussey, Amanda N. Barkley, Margaret A. Treble, Iva Peklova and Aaron T.
SLIDE 2
SLIDE 3
Greenland Halibut
- Pan-Arctic
distribution
Hedges et al. 2017. In State of the Arctic Marine Biodiversity Report
SLIDE 4
Greenland Halibut
- Peak spawning
– November to January in Norway – February to March in Davis Strait
- Extended spawning
– September to March
- Mesopelagic eggs
- Settle when 65-70 mm, roughly in July
- 50% maturity at 59-65 cm
SLIDE 5
Greenland Halibut
- Commercial
fisheries active in most areas
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Greenland Halibut Fisheries
- Canadian
commercial fisheries in Arctic
– Established fisheries – Exploratory fisheries
Baffin Bay/ Davis Strait Cumberland Sound Pond Inlet Clyde River Qikiqtarjuaq
SLIDE 7
Stock Structure
- Cytochrome-b – homogeneous
– Vis et al. 1997. Can. J. Fish. Aquat. Sci.
- Microsatellites – panmixia
– Roy et al. 2014. Can. J. Fish. Aquat. Sci.
SLIDE 8
Stock Structure
- snp analysis showed
possible barrier in the Atlantic.
– Westgaard et al.
- 2017. Can. J. Fish.
- Aquat. Sci.
SLIDE 9
Telemetry Network 2017 Tremblay Sound Scott Inlet Broughton Island Baffin Island shelf break
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Cumberland Sound 2011-2012
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Cumberland Sound 2014-2016
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Hussey et al. 2017. Ecological Applications
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Scott Inlet 2012-2017
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Transients Residents Mysterious
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Qikiqtarjuaq 2015-2017
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Large Scale Movements
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Fishery Management Cumberland Sound Turbot Management Area
- Community-based
- Winter longlines
– Ice-based
- Separate management area and quota
– Sink population supported by Baffin Bay – No emmigration – No local reproductiong
- Developing open water season
SLIDE 19
Fishery Management Cumberland Sound Turbot Management Area
- Catches better in
deeper water Historically best winter catches High open water catches
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Fishery Management Cumberland Sound Turbot Management Area
- Request revision of
boundary to allow quota to be fished throughout Cumberland Sound
– Extend to Nunavut Settlement Area Boundary
- Provisional change to
facilitate fishery
– Dependent on completion
- f a tracking study
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Fishery Management Cumberland Sound Turbot Management Area
- Electronic tagging in
2010, 2011, 2014
- Tracking 2010-2012,
2014-2016
SLIDE 22
Fishery Management Stock Connectivity
SLIDE 23
Conclusions
- Local-scale tracking revealing seasonal movement
patterns and behavioural types
– Movements related to ice conditions? – Movements related to marine mammals?
- Broad-scale tracking revising understanding of
connectivity
– Provides context for genetic analyses
- Telemetry can effectively inform fisheries
management
– Area and stock definitions – Seasonal behaviours
SLIDE 24
Acknowledgements
- Government of Nunavut
- Pangnirtung HTO
- Clyde River HTO
- Qikiqtarjuaq HTO
- Pond Inlet HTO
- Fishing Industry
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