Marine Aquaculture
description
Transcript of Marine Aquaculture
Marine AquacultureJodie Toft and the Marine NatCap team
InVEST Finfish Aquaculture Model Evaluate how human activities and climate change may
affect production and value of aquacultured finfish
Image courtesy of the BC Salmon Farmers Association
Terrestrial/freshwater model: Tier 1 supporting serviceTerrestrial/freshwater model: Tier 1 that quantifies service
Coastal Vulnerability
Coastal Protection
Overlap Analysis
Renewable Energy
Habitat Risk Assessment; Biodiversity
Reservoir Hydropower Production
Sediment Retention
Managed Timber
Production
Crop Pollination
Water Purification
Marine model: Tier 1 that quantifies serviceMarine model: Tier 0
Marine model: Tier 1 supporting service
InVE
ST M
odel
s & L
inka
ges
AestheticQuality
Recreation
Carbon Storage &
Sequestration
(Blue Carbon)
Agricultural Production
Flood Risk Mitigation
Groundwater Recharge
Fisheries (including
recreational)
AquacultureMarine Water
Quality
Optional model linkage, no sequencingRequired/optional model linkage, sequencing needed
Model coming soon!
Ecosystem Service = Provisioning of Food
What about filtration?
Terrestrial/freshwater model: Tier 1 supporting serviceTerrestrial/freshwater model: Tier 1 that quantifies service
Coastal Vulnerability
Coastal Protection
Overlap Analysis
Renewable Energy
Habitat Risk Assessment; Biodiversity
Reservoir Hydropower Production
Sediment Retention
Managed Timber
Production
Crop Pollination
Water Purification
Marine model: Tier 1 that quantifies serviceMarine model: Tier 0
Marine model: Tier 1 supporting service
InVE
ST M
odel
s & L
inka
ges
AestheticQuality
Recreation
Carbon Storage &
Sequestration
(Blue Carbon)
Agricultural Production
Flood Risk Mitigation
Groundwater Recharge
Fisheries (including
recreational)
AquacultureMarine Water
Quality
Optional model linkage, no sequencingRequired/optional model linkage, sequencing needed
Model coming soon!
VIDEO INTERLUDE.
Weight of fish harvested
Value of fish harvested
InputsFarm locations
Farm operationsNumber of fish, date of outplanting, ideal harvest and dressed wt.
Environmental characteristicsTemperature
EconomicsPrice-per-pound, operating costs, wages
Outputs
Growing an individual fish
Stigebrandt 1999. Turnover of energy and matter by fish – a general model with application to salmon. Fisken og Havet
0123456789
10
0 200 400 600
Wei
ght (
kg)
Days
T = 11CT = 9CT = 13C
Weightt = (aWt-1b * temperature effect) + Wt-1
Outplanting weight
Target harvest weight
Ecosystem service value: 1 growing cycle, 1 farm
Weight of harvested fish = (target harvest weight * # of fish in the net-pen) - mortality
Weight of processed fish = Wt. of harvested fish * fraction remaining after processing
Value of processed fish = Wt. of processed fish * (market price – fraction that is costs)
A complete model run: 1 farm
User-defined length of model run (e.g., 5 years)0 5
0
1
2
3
4
5
6
7
8
0 200 400 600
Wei
ght (
kg)
Days
Value of processed fish
0
1
2
3
4
5
6
7
8
0 200 400 600
Wei
ght (
kg)
Days
Fallowing period
The Model in Action:Salmon netpens in WCVI
Value of salmon harvest (5 years)
Finfish_HarvestValue ($)
0 - 3,397,750
3,397,751 - 6,795,500
6,795,501 - 10,193,250
10,193,251 - 13,591,000
• $240,325,000• 184,811,334 kg
Scenarios1. Baseline: some farms fallow, some don’t2. Scenario A: all farms have 4 month fallowing period, some
farms removed or relocated3. Scenario B: some farms fallow, some farms removed
Baseline
Scenario BScenario A
Baseline Scenario A Scenario B $-
$50,000,000
$100,000,000
$150,000,000
$200,000,000
$250,000,000
$300,000,000 Baseline Scenario A Scenario B
020,000,00040,000,00060,000,00080,000,000
100,000,000120,000,000140,000,000160,000,000180,000,000200,000,000
Harvested biomass (kg)
Net present value ($)
Data Requirements
Application
• What might you use this model for? • For what kinds of questions in what kinds of
decision making?
Hands-on session
The Model in Action: Part 2Shellfish aquaculture in Lemmens Inlet
Floathomes
Shellfish tenures
Value ($)2,209 - 44,640
44,641 - 87,072
87,073 - 129,503
129,504 - 171,935
Floathomes
Shellfish tenures
Value ($)2,209 - 44,640
44,641 - 87,072
87,073 - 129,503
129,504 - 171,935
Ecosystem risk<VALUE>
1.24 - 2.80
2.80 - 4.35
4.35 - 5.91
Float homes and shellfish tenures in Lemmens Inlet
A. Baseline B. Conservation
C. Industry Expansion
FloatHome
sEelgrassRecreationa
lKayaking
IncreasedKayaking
ShellfishAquacultur
e
GeoduckHarvest
CrabHarvest
Guerry et al IJBSESM, in press
What’s next for Aquaculture in InVEST?
Finfish: wastes and sea lice
Finfish: wastes and sea lice
For use by other InVEST models:• Habitat Risk
Assessment• Water Quality• Fisheries
Shellfish!
Who?• Pacific Oyster• Easter Oyster• Blue Mussel• Manila Clam
What?• Quantity, Value
of harvest• Quantity of
Filtration (for use in other models)
Questions?