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Marine InVEST Spiny Lobster Model Katie Arkema, Jodie Toft, Gregg Verutes, Spencer Wood Photo credit: Julie Stockbridge.

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Presentation on theme: "Marine InVEST Spiny Lobster Model Katie Arkema, Jodie Toft, Gregg Verutes, Spencer Wood Photo credit: Julie Stockbridge."— Presentation transcript:

1 Marine InVEST Spiny Lobster Model Katie Arkema, Jodie Toft, Gregg Verutes, Spencer Wood Photo credit: Julie Stockbridge

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3 Food People benefit in many ways from fish Tourism and recreation Jobs and livelihoods Cultural heritage

4 Commercial fishing for Caribbean spiny lobster (Panulirus argus) In ,310 lbs exported $14,808,642 CAPTURE FISHERIES EXPORT IN DOLLARS FOR 2008

5 Coastal zone management questions (examples) What areas are most important for catch of spiny lobster? Where should mangroves and corals be protected in order to maintain lobster catch?

6 InputsOutputs Fishing zone Where do people catch lobster? Habitat Where? How much? Fishing pressure How much do people fish? Catch of spiny lobster (no./m 2 /yr) Market value of catch ($/m 2 /yr) Value of habitats that support lobster

7 Age-structured matrix model (8 classes)

8 Habitat influences survival and recruitment

9 Regulations influence catch Catch limits Fisher limits Seasonal closures

10 Age-structured matrix model (8 classes) Beverton-Holt recruitmentHabitats influence survivorship Regulations influence catch

11 Running the model Fit model to catch and CPUE data to determine historical and present adult biomass Allocate adult biomass to 9 planning regions based on coral cover

12 Model fitting to determine historical and present adult biomass 2 datasets for catch Historical Lobster Production from Ministry of Agriculture and Fisheries, 2008 Annual Report data from fisheries department to CZMAI 3 time series of catch per unit effort data (CPUE) and Carcamo, Jr, R.A Report on the spiny lobster fisheries of Belize. in: Second Workshop on the Management of Caribbean Spiny Lobster Fisheries in the WECAFC Area. FAO Fisheries Report No , Long Term Atoll Monitoring Program (LAMP) fishery independent surveys at SCMR, Glover’s, GSSCMR and LBCNP , we used data from the Glover’s Reef Atoll Fisheries Catch Data Collection Program, which is a fishery-dependent catch-monitoring program of fisher catch in Glover’s Reef General Use Zone.

13 Coastal zone management questions (examples) What areas are most important for catch of spiny lobster? Where should mangroves and corals be protected in order to maintain lobster catch?

14 What areas are important for catch of spiny lobster?

15 What areas are important for catch of spiny lobster?

16 Catch in year 2021 (lbs/km 2 ) What areas are important for catch of spiny lobster?

17 Valuation? Gross export revenue Net revenue – we need better information on fishing and processing costs NPV – need net revenue Do we want to value lobster exported, sold locally, together, separately?

18 What habitat areas are important for catch of spiny lobster? Catch in year 2021 (lbs/km 2 )

19 Loss of habitats decreases catch Current habitat50% reduction in habitat per planning region

20 Questions How should we divide up lobster population? (by coral cover) How should we report catch? (by planning region) What are the most pressing management questions (scenarios in zoning plan)? Do you have feedback on fishing zone?

21 Acknowledgements Marine Team of Natural Capital Project Mary Ruckelshaus, Anne Guerry, CK Kim, Greg Guannel, Joey Bernhardt, Jess Silver


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