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Future Harvest Strategies to Increase Economic Yield and Productivity of Wild Fisheries Caleb Gardner.

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Presentation on theme: "Future Harvest Strategies to Increase Economic Yield and Productivity of Wild Fisheries Caleb Gardner."— Presentation transcript:

1 Future Harvest Strategies to Increase Economic Yield and Productivity of Wild Fisheries Caleb Gardner

2 sustainability is easy, and a low bar FRDC Evaluating the Performance of Australian Marine Capture Fisheries. “Australia-wide, fisheries could increase their economic return by 36%-46% through appropriate management” “fully exploited” ??

3 1.2 Enhanced yields from wild-harvest innovations “Bioeconomic evaluation of commercial scale stock enhancement in abalone”

4 Bioeconomic evaluation of commercial scale stock enhancement in abalone

5

6

7 Release methods

8 Bioeconomic evaluation of commercial scale stock enhancement in abalone Commercialisation targeting profit increase from 6.2 to 10.5 million [ 30 mm juveniles]

9 1.4 Removal or reduction of key production constraints to enhance profitability in selected wild-harvest production “Spatial management of southern rock lobster”

10 Taroona Reserve Anson’s Bay Maria Island (Reidle Bay) King Island Stanley Ketchum Island TASMANIAN TRANSLOCATIONS Whale Head Georges Rock Gull Island Sandy Cape Main translocation experiment: 10 sites, 28025 lobsters

11 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits 12 months

12 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits

13 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits omega-3 long-chain PUFA content increased by 30% in the muscle of translocated lobsters

14 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits

15 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits

16 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits

17 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits

18 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits Male 0 5 10 15 20 25 708090100110120130140150160170180 Increase in length (CL mm/year)

19 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits

20 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits 500,000 lobsters / year ~ 2x profit per potlift by year 10 Does 500,000 seem extreme? Easily sustainable based on stock model Requires ~ 500 vessel days in an area with 7440 vessel days (7%)

21 Spatial management of southern rock lobster 1.Change in market traits colour shape lipid transport survival 2.Do they move back to deep water? 3.Overall effects on egg production 4.Effect on habitat 5.Productivity (survival and growth) 6.Costs vs Benefits Conclusion: opportunity cost of not undertaking translocation = $11 million @ 50K lobsters ($1.1K/unit) = $21 million @ 100K lobsters ($2.0K/unit) = $90 million @ 500K lobsters ($8.4K/unit) Conclusion: opportunity cost of not undertaking translocation = $11 million @ 50K lobsters ($1.1K/unit) = $21 million @ 100K lobsters ($2.0K/unit) = $90 million @ 500K lobsters ($8.4K/unit)

22 Getting support for change….

23 Thank you

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