Development Of A Rapid Response Initiative For Brown Tree Snakes In Texas
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Development Of A Rapid Response Initiative For Brown
Tree Snakes In Texas
M.A. Hall, S.E. Henke, B. Pitman
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• Arboreal, Nocturnal, Rear-Fanged Snake - Mildly Venomous
• Habitat is thick arboreal habitat, adaptable to less dense habitat.
• Diet: wide and varied. The snake will eat anything it can.
• Juveniles – ectothermic prey Adults – endothermic prey
The Brown Tree Snake
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The Brown Tree Snake
Distribution
Native Range is north and eastern Australia through New Guinea and
surrounding islands.
• Density is extremely low
• Malaita, Solomon Islands 0.10/ha
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The Brown Tree Snake
Distribution
Expanded range includes Guam.With sightings on several other
islands.
• Density on Guam 24-120/ha
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KWAJALEINCAROLINE ISLANDS
GUAM
SAIPAN
ROTA
OKINAWAIWO JIMA
PHILIPPINE ISLANDS
NEW GUINEASOLOMON ISLANDS
GUADALCANAL
JAPAN
MARSHALL ISLANDS
CELEBES
OAHU
HAWAIIAN ISLANDS
Area of Enlargement
TEXAS
DIEGO GARCIA
SPAIN
ALASKA
TINIAN
POHNPEI
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The Brown Tree Snake
• ENVIRONMENTAL - The brown tree snake has contributed to the loss of native avian, and reptilian species on Guam.
• ECONOMIC - Snakes in search of prey cause electrical out-ages on power lines. The added cost of control is a burden on the economy.
• HUMAN - The snake poses a limited threat to humans. The bite of the snake can cause some minor irritation. The old and the young are most at risk.
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The Brown Tree Snake
• ENVIRONMENTAL - The brown tree snake has contributed to the loss of native avian, and reptilian species on Guam.
• ECONOMIC - Snakes in search of prey cause electrical out-ages on power lines. The added cost of control is a burden on the economy.
• HUMAN - The snake poses a limited threat to humans. The bite of the snake can cause some minor irritation. The old and the young are most at risk.
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The Brown Tree Snake
• ENVIRONMENTAL - The brown tree snake has contributed to the loss of native avian, and reptilian species on Guam.
• ECONOMIC - Snakes in search of prey cause electrical out-ages on power lines. The added cost of control is a burden on the economy.
• HUMAN - The snake poses a limited threat to humans. The bite of the snake can cause some minor irritation. The old and the young are most at risk.
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Controlling The Brown Tree Snake
Guam Is a shipping and military hub
Multi-Agency EffortPacific Region
USDA-WSUSFWSUSGS
State and local agencies
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Controlling The Brown Tree Snake
• Ecological
• Mechanical
• Chemical
• Biological
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Controlling The Brown Tree Snake
• Ecological
• Mechanical
• Chemical
• Biological
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Controlling The Brown Tree Snake
• Ecological
• Mechanical
• Chemical
• Biological
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Controlling The Brown Tree Snake
• Ecological
• Mechanical
• Chemical
• Biological
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Rapid Response Team•What is it?
•Part of three pronged approach to prevent the spread of the BTS
•Prevention
•Interdiction
•Rapid Response
•New Program (2002)•Limited To Pacific Region
•Primary Goal: Find Reported Snake
•Detect Incipient Populations
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Rapid Response
• How it works:
•Sighting outside of Guam
•Call is made to a hotline
•An investigator conducts an interview
•Search area defined, a search conducted
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Rapid Response
•Secondary Benefits
•Develops a data base of potential prey for future monitoring
•Education of local population
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Rapid Response In Texas
•Major Points of Entry
•Ports•Corpus Christi•Houston
•Major Airports (2)
•Military Bases (18)
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Rapid Response In
Texas1
8 5
3
6
2
4
7
1 – Texas Tech
2 – Tarleton
3 – SF Austin
4 – Angelo State
5 – TAMU
6 – SWT
7 – TAMUK
8 – Sul Ross
Texas schools act as sources for search teams
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Rapid Response In Texas
•Secondary Benefits
•Increase student involvement/awareness of wildlife issues
•Education (Case Study)•Brown Snake (Storeria dekayi)
•Shoebox in Oklahoma
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Similar Programs
•Existing programs that show success:
•Zebra Mussels•Salvinia
•Established groups that monitor certain areas, conduct
information/prevention programs
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Summary
•BTS
•RRT a control method
•Similar Programs
•Benefits to Texas
•Student Participation is the Key
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Acknowledgements
• USFWS
• Dr. Henke
• Students and Staff of the CKWRI
• Photographs courtesy of: USDA, USGS, 100th Meridian, C. Jacano, Scott Williamson
• Maps courtesy of: USGS
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Contact Information
• www.nabtsct.org
• Dr. Henke - [email protected]
• Marc Hall – [email protected]