turtles in louisiana - u.s. fish and wildlife service · 2014-07-30 · turtles in louisiana ....
TRANSCRIPT
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TURTLES IN LOUISIANA
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RED-EARED SLIDER – 1988 vs 2009
• 1 some illegal trade • 2 100,000 female RES from wild each year • 3 6 months = tens of thousands trapped for food
– shipped to Asia • 4 trappers must expand areas to trap • 5 declines noted (1984-1988) • 6 trade in RES is widespread and increasing • 7 CITES list would allow data of exact numbers
traded • 8 hatchling turtles carry salmonella1
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TURTLE FARMS
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BANS – TRENDS - DIVERSIFICATION
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LEMIS DATA
• 2003-2008 – 77,841,396 turtles • 68% shipped from New Orleans
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APALONE
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TURTLES AS FOOD • Chelydra + Apalone ferox • $1.25 lb • New Orleans • 171 Chelydra, 423 Apalone/ yr
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NUISANCE TURTLES
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TURTLE SURVEYS
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ALLIGATOR SNAPPING TURTLE
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SURVEY RESULTS
8421 Trap Nights
123 Sites
541 Alligator Snappers
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Demographics
• Seasonality: 0.052 vs 0.070 • Water Body: 0.075 vs 0.045 • Juveniles – 43% • Sex Ratio – 49:51 • Weight – mean 18 kg : 13 kg
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HARVEST HISTORY » Harvest No harvest
• % juveniles ns
• Sex ratio ns
• Weight 12.0 8.9
• Trap rate 0.05 0.07
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Missing cohorts 1997 2007
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MESH SIZE
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TOTAL TURTLES 8421 trap nights
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TEN-YEAR RESURVEY
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BOX TURTLES
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DEMOGRAPHY
• 5 eggs per clutch
• 441 box turtles from 7 sites
• Females mature at 7/8 years at ~12 cm CL
• Sex ratio 58:42
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Harvest effects
• Adult CL ns • Juv CL ns • Sex ratio ns • Juv % ns
• Capture rate • 0.41 vs 0.93
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POPULATION
• ~6.5 adults per acre
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MANAGEMENT
• Area Closures • Seasonal Closures • Size Restrictions • Harvest Quotas • Males Only
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The Take of Turtles