Environmental and Socioeconomic Risks of Shrimp Aquaculture Erin Farrell, Chris Lang, Sarah Von...
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Transcript of Environmental and Socioeconomic Risks of Shrimp Aquaculture Erin Farrell, Chris Lang, Sarah Von...
Environmental and Environmental and Socioeconomic Risks ofSocioeconomic Risks of
Shrimp AquacultureShrimp Aquaculture
Erin Farrell, Erin Farrell, Chris Lang, Chris Lang, Sarah Von LehmanSarah Von LehmanTeam A04-BTeam A04-B
SummarySummary
Environmental and Socio-economic Environmental and Socio-economic Aspects of shrimp aquacultureAspects of shrimp aquaculture Physical environmentPhysical environment Water QualityWater Quality Negative and Positive Socio-economicNegative and Positive Socio-economic
What are the environmental risks What are the environmental risks associated with shrimp aquaculture?associated with shrimp aquaculture?
Problem StatementProblem Statement
Resource intensiveResource intensive High demand for productHigh demand for product Escalation of risksEscalation of risks
Physical Environment: Shift to Physical Environment: Shift to Intensive AquacultureIntensive Aquaculture
Becoming lucrative in early 1980sBecoming lucrative in early 1980s Traditional practicesTraditional practices
One crop per yearOne crop per year 100-500 kg shrimp / hectare100-500 kg shrimp / hectare
Semi-intensive and intensive practicesSemi-intensive and intensive practices 2-3 crops per year2-3 crops per year 1,000-10,000 kg shrimp / hectare1,000-10,000 kg shrimp / hectare
Mangrove Functions & ResourcesMangrove Functions & Resources
Trap sedimentsTrap sediments Process nutrients & organic matterProcess nutrients & organic matter Provide food and habitatProvide food and habitat Protect shorelinesProtect shorelines Provide plant productsProvide plant products
Mangrove DestructionMangrove Destruction
Feed, seed, energy, and fresh waterFeed, seed, energy, and fresh water Lifespan of 5-10 yearsLifespan of 5-10 years 1993-1994 > increase of 200,000 ha of 1993-1994 > increase of 200,000 ha of
shrimp ponds in Asiashrimp ponds in Asia
Water QualityWater Quality
Feed and Gut Passage TimesFeed and Gut Passage Times How fast food is digestedHow fast food is digested
How completely it’s digestedHow completely it’s digested Depends on species and Food ContentDepends on species and Food Content
Uneaten Food, FecesUneaten Food, Feces Eutrophication / AnoxiaEutrophication / Anoxia
Taura Syndrome VirusTaura Syndrome Virus
Shrimp Infected with TSV Healthy Shrimp
Recent studies show possible transferance to mammalian species (including human and monkey)
Other Water Quality IssuesOther Water Quality Issues
Salt water intrusionSalt water intrusion
Nutrient Enrichment (Effluent)Nutrient Enrichment (Effluent) Particulate organic matter (decayed / live plankton)Particulate organic matter (decayed / live plankton) Fertilizers / Insecticides (N and P)Fertilizers / Insecticides (N and P) AntibioticsAntibiotics
Water QualityWater Quality
Turbidity and SedimentationTurbidity and Sedimentation Increasing acreage = soil erosionIncreasing acreage = soil erosion Canals, roads, & other infrastructureCanals, roads, & other infrastructure Plants intolerant of salinityPlants intolerant of salinity
Pond area in production in southern Honduras from 1985 to 2000
Positive Shrimp CulturePositive Shrimp Culture
EconomicEconomic $56.47 Industry 2000$56.47 Industry 2000 Many communities rely on shrimp cultureMany communities rely on shrimp culture
Sustainable methodsSustainable methods
Use less intense shrimp practicesUse less intense shrimp practices Lower stocking densities resulting in Lower stocking densities resulting in
higher survival rateshigher survival rates Less diseasesLess diseases Less inputs into systemLess inputs into system
Land delegationLand delegation
Rotate between shrimp and riceRotate between shrimp and rice Delegate productive rice fieldsDelegate productive rice fields Education is essentialEducation is essential
EducationEducation
Types of shrimpTypes of shrimp Other possibilities for cropsOther possibilities for crops Using currentsUsing currents Dry season feedDry season feed Less intensiveLess intensive
Negative AspectsNegative Aspects
Local farmers can not competeLocal farmers can not compete Cut off from mangrovesCut off from mangroves Government backingGovernment backing
ConclusionsConclusions
Industry expansionIndustry expansion Water quality and environmental impactsWater quality and environmental impacts EducateEducate Move toward sustainabilityMove toward sustainability