Current Status of Coqui Frog (Eleutherodactylus coqui) on Maui and an Overview of Approaches to Control
PRESENTER: Abe Vandenberg
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Abe Vandenberg
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anv@hawaii.edu
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Biology and Impacts
Coqui Reproductive Biology
male guards & keeps eggs moist until hatching
Female lays eggs and does not vocalize
Froglets hatch in 14-17 days, mature in 8 months, & may live as long as 4-6 years
In Hawai`i [lab conditions] , mating pairs produce a clutch every 2½ weeks
Native to Puerto Rico, female coqui lay clutches of 34-75 eggs, 4 to 6 times a year
https://www.ctahr.hawaii.edu/coqui/life.asp
Eleutherodactylus
genus of frogs does not have a tadpole stage; hatch as froglets
Potential Coqui Distribution
Open
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Biology and Impacts
Coqui Reproductive Biology
male guards & keeps eggs moist until hatching
Female lays eggs and does not vocalize
Froglets hatch in 14-17 days, mature in 8 months, & may live as long as 4-6 years
In Hawai`i [lab conditions] , mating pairs produce a clutch every 2½ weeks
Native to Puerto Rico, female coqui lay clutches of 34-75 eggs, 4 to 6 times a year
https://www.ctahr.hawaii.edu/coqui/life.asp
Eleutherodactylus
genus of frogs does not have a tadpole stage; hatch as froglets
Potential Coqui Distribution
Barrier
Coqui Barrier Diagram
Guardrails Adapted for Coqui Barrier Infrastructure
Coqui Barrier
Homeowner Experimentation with Different Barrier Materials
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Barrier
Coqui Barrier Diagram
Guardrails Adapted for Coqui Barrier Infrastructure
Coqui Barrier
Homeowner Experimentation with Different Barrier Materials
Strategy
19 Eradicated Coqui Populations
10 Active Coqui Populations
(including Maliko)
Open
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Strategy
19 Eradicated Coqui Populations
10 Active Coqui Populations
(including Maliko)
Citric Acid Control
Crew Truck and Citric Tank/Sprayer
Trucks, Reservoirs, Tractors, Pumps
Unloading Pallets of Citric Acid AnHydrous
Citric Acid Anhydrous
Mixing 12% Citric Acid Solution
12% Citric Acid Transferred to Reservoirs Tanks
PVC Pipeline Placed In Remote Gulch Areas
Rappelling to Install Vertical Pipe from Rim Reservoirs to Gravity Fed Treatment Pipe
Spray Stations Installed for Fire hose Drench Treatments
1" and 1.5" Fire hose Treatment Delivered Through PVC Pipeline
Multiple Crews Treating Gulch Populations from PVC Pipelines
Hoses Carried into Gulches in "Dry Bags"
High Volume Ag Sprinkler Gun Placement
High Volume Pump and Reservoir System
High Volume Ag Sprinklers Spray into Maliko Gulch
In Development
Small Fixed Line, Movable Sprinkler Systems
Open
×
Citric Acid Control
Crew Truck and Citric Tank/Sprayer
Trucks, Reservoirs, Tractors, Pumps
Unloading Pallets of Citric Acid AnHydrous
Citric Acid Anhydrous
Mixing 12% Citric Acid Solution
12% Citric Acid Transferred to Reservoirs Tanks
PVC Pipeline Placed In Remote Gulch Areas
Rappelling to Install Vertical Pipe from Rim Reservoirs to Gravity Fed Treatment Pipe
Spray Stations Installed for Fire hose Drench Treatments
1" and 1.5" Fire hose Treatment Delivered Through PVC Pipeline
Multiple Crews Treating Gulch Populations from PVC Pipelines
Hoses Carried into Gulches in "Dry Bags"
High Volume Ag Sprinkler Gun Placement
High Volume Pump and Reservoir System
High Volume Ag Sprinklers Spray into Maliko Gulch
In Development
Small Fixed Line, Movable Sprinkler Systems
Data Driven Systems
Data Driven Systems
Our Systems Have Developed from Paper Data Forms...
...and Outdated Trimble GPS Units...
...to Galaxy Android Smart Phones Using...
Web Based Online Forms for Crew Data Collection
....Interconnected Operational Data Systems for Field Crews
Locus Map on Android Phones Documents Frog Points (Downward Arrows), Survey Tracks (Yellow), and Treatment Tracks (Blue)
ArcMap GIS is the Final Destination for Spatial Data
Open
×
Data Driven Systems
Data Driven Systems
Our Systems Have Developed from Paper Data Forms...
...and Outdated Trimble GPS Units...
...to Galaxy Android Smart Phones Using...
Web Based Online Forms for Crew Data Collection
....Interconnected Operational Data Systems for Field Crews
Locus Map on Android Phones Documents Frog Points (Downward Arrows), Survey Tracks (Yellow), and Treatment Tracks (Blue)
ArcMap GIS is the Final Destination for Spatial Data
Habitat Reduction
Male Coqui and Eggs in Foliage Habitat
"Cane Grass" Habitat
Coqui in Favorable Habitat
Mowing to Reduce Coqui Habitat
Chipping Overgrown Trees in Infested Areas
Illegal Greenwaste Dumping Spreads Coqui
Coconut Dumping from Coqui Infested Areas to Uninfested Areas
Open
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Habitat Reduction
Male Coqui and Eggs in Foliage Habitat
"Cane Grass" Habitat
Coqui in Favorable Habitat
Mowing to Reduce Coqui Habitat
Chipping Overgrown Trees in Infested Areas
Illegal Greenwaste Dumping Spreads Coqui
Coconut Dumping from Coqui Infested Areas to Uninfested Areas
Community Engagement
Community Meeting with Maui's Mayor
Community Trucks Transporting MISC's 100 Gallon Sprayers for Neighborhood Treatment
Control Work Reported by Public Volunteers
Open
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Community Engagement
Community Meeting with Maui's Mayor
Community Trucks Transporting MISC's 100 Gallon Sprayers for Neighborhood Treatment
Control Work Reported by Public Volunteers