Ontogenetic Shifts in Carrion Attractiveness to Brown Tree Snakes (Boiga irregularis)

1999 ◽  
Vol 33 (2) ◽  
pp. 334 ◽  
Author(s):  
John A. Shivik ◽  
Larry Clark
Keyword(s):  
Boiga Irregularis ◽  
Ontogenetic Shifts ◽  
Brown Tree Snakes

scholarly journals Potential Economic Damage from Introduction of Brown Tree Snakes, Boiga irregularis (Reptilia: Colubridae), to the Islands of Hawai'i

2010 ◽  
Vol 64 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Stephanie A. Shwiff ◽  
Karen Gebhardt ◽  
Katy N. Kirkpatrick ◽  
Steven S. Shwiff
Keyword(s):  
Economic Damage ◽  
Boiga Irregularis ◽  
Brown Tree Snakes

Cardiopulmonary Effects and Efficacy of Propofol as an Anesthetic Agent in Brown Tree Snakes, Boiga irregularis

1999 ◽  
Vol 9 (2) ◽  
pp. 9-17 ◽  
Author(s):  
Nancy L. Anderson ◽  
Raymund F. Wack ◽  
Liz Calloway ◽  
Thomas E. Hetherington ◽  
Joseph B. Williams
Keyword(s):  
Anesthetic Agent ◽  
Boiga Irregularis ◽  
Brown Tree Snakes

The oral and dermal toxicity of selected chemicals to brown tree snakes (Boiga irregularis)

1998 ◽  
Vol 25 (4) ◽  
pp. 427 ◽  
Author(s):  
Joe E. Brooks ◽  
Peter J. Savarie ◽  
John J. Johnston
Keyword(s):  
Propylene Glycol ◽  
Piperonyl Butoxide ◽  
Boiga Irregularis ◽  
Dermal Toxicity ◽  
Oral Toxicity ◽  
Brown Tree Snakes ◽  
Oral Doses

We evaluated the oral and dermal toxicity of 18 chemicals to brown tree snakes (Boiga irregularis). Chemicals that produced mortality when dosed orally were rotenone, propoxur, natural pyrethrins, allethrin, resmethrin, diphacinone, warfarin, and aspirin. The lowest oral doses that gave 100% mortality were: rotenone, 2.5 mg kg-1; pyrethrins, 40 mg kg-1; propoxur, 40 mg kg-1; diphacinone, 80 mg kg-1; and aspirin, 1280 mg kg-1. Allethrin, resmethrin, and warfarin produced 80% mortality at 40 mg kg-1, the highest dose tested. Materials given orally that produced little mortality were permethrin, fenvalerate, and carbaryl; those giving no mortality were phenothrin, tetramethrin, piperonyl butoxide, propylene glycol, and cholecalciferol. Chemicals that produced mortality when applied dermally at doses of 40 mg kg-1 were rotenone, nicotine, propoxur, natural pyrethrins, allethrin, and resmethrin; those that gave no mortality were permethrin, fenvalerate, phenothrin, tetramethrin, piperonyl butoxide, and diphacinone. Rotenone, at 10 mg kg-1, and nicotine, at 40 mg kg-1, were the most toxic dermally, killing all tested snakes. Piperonyl butoxide enhanced the oral toxicity of allethrin and resmethrin and the dermal activity of resmethrin; it did not enhance the activity of natural pyrethrins either orally or dermally.

scholarly journals Trapping strategies for deterring the spread of Brown Tree Snakes from Guam

1998 ◽  
Vol 4 (4) ◽  
pp. 348 ◽  
Author(s):  
Richard M. Engeman ◽  
Michael A. Linnell
Keyword(s):  
Pacific Islands ◽  
Health Hazard ◽  
Economic Problem ◽  
Planning Tool ◽  
Boiga Irregularis ◽  
Terrestrial Vertebrates ◽  
Brown Tree Snake ◽  
Brown Tree Snakes ◽  
Trap Placement ◽  
Accidental Introduction

The accidental introduction of the Brown Tree Snake Boiga irregularis to Guam has resulted in the extirpation of most of the island's native terrestrial vertebrates, has presented a health hazard to infants and children, and also has produced an economic problem. Prevention of its dispersal through Guam's cargo traffic to other Pacific islands has become a high environmental priority. Trapping around ports and other cargo staging areas is central to an integrated pest management programme designed to deter dispersal of the species. In this study, perimeter trapping of forested plots characteristic of those found in port areas was found to be the most effective trap placement strategy, although trap lines cut through the plot interior or placed along a single plot boundary were also effective. Snake removal potentially can be modelled using an exponential decay over time, providing the manager with a planning tool. Population recovery of Brown Tree Snakes in trapped plots was found to be slow in the fragmented forested habitats found around ports.

Diurnal refuge-site selection by Brown Treesnakes (Boiga irregularis) on Guam

2008 ◽  
Vol 29 (2) ◽  
pp. 284-287 ◽  
Author(s):  
Brad Coupe ◽  
Nancy Anderson ◽  
Thomas Hetherington ◽  
Gad Perry ◽  
Joseph Williams
Keyword(s):  
Site Selection ◽  
Thermal Characteristics ◽  
Boiga Irregularis ◽  
Brown Treesnake ◽  
Data Loggers ◽  
Radio Transmitters ◽  
Natural Range ◽  
Brown Tree Snakes ◽  
Free Ranging ◽  
Arboreal Snakes

Abstract Diurnal refuge-site selection was studied in eleven free-ranging brown tree snakes (Boiga irregularis) in tropical forest on the island of Guam. These nocturnal and mostly arboreal snakes were tracked using implanted radio-transmitters. A vegetation survey of the study site was performed to determine if brown treesnakes non-randomly select certain plants for refuge-sites, and thermal profiles of representative refuge sites were obtained with Hobo data loggers. Brown treesnakes preferentially used Pandanus crowns for refuge-sites. Although Pandanus represents a small proportion (3.6%) of the forest, most snakes used Pandanus most of the time for refuge. The thermal characteristics of Pandanus were comparable to those of other refuge-sites. We speculate that features of Pandanus that provide basking opportunities and moist microhabitats may be important for brown treesnakes. As Pandanus is widely distributed throughout the natural range of the brown treesnake, this genus may represent an important refuge-site for this species.

Venom of the Brown Treesnake, Boiga irregularis: Ontogenetic shifts and taxa-specific toxicity

Toxicon ◽  
2006 ◽  
Vol 47 (5) ◽  
pp. 537-548 ◽  
Author(s):  
Stephen P. Mackessy ◽  
Nicole M. Sixberry ◽  
William H. Heyborne ◽  
Thomas Fritts
Keyword(s):  
Boiga Irregularis ◽  
Ontogenetic Shifts ◽  
Brown Treesnake

Response of brown tree snakes (Boiga irregularis) to human blood

1993 ◽  
Vol 19 (1) ◽  
pp. 91-96 ◽  
Author(s):  
David Chiszar ◽  
Thomas M. Dunn ◽  
Hobart M. Smith
Keyword(s):  
Human Blood ◽  
Boiga Irregularis ◽  
Brown Tree Snakes

Effectiveness of the detector dogs used for deterring the dispersal of Brown Tree Snakes

1998 ◽  
Vol 4 (3) ◽  
pp. 256 ◽  
Author(s):  
Richard M. Engeman ◽  
Daniel S. Vice ◽  
Danny V. Rodriguez ◽  
Kenneth S. Gruver ◽  
William S. Santos ◽  
...  
Keyword(s):  
Health Hazard ◽  
Infants And Children ◽  
Search Pattern ◽  
Economic Losses ◽  
Boiga Irregularis ◽  
Routine Procedure ◽  
Terrestrial Vertebrates ◽  
Brown Tree Snake ◽  
Brown Tree Snakes ◽  
Accidental Introduction

The accidental introduction of the Brown Tree Snake Boiga irregularis to Guam has resulted in the extirpation of most of the island's native terrestrial vertebrates, has created a health hazard to infants and children, and has resulted in economic losses. Cargo inspections using teams of handlers and their detector dogs form a last line of defense for preventing Brown Tree Snake dispersal from Guam. To assess the efficacy of the teams of handlers and their dogs for locating stowed Brown Tree Snakes, we planted Brown Tree Snakes (in escape-proof containers) in cargo without the knowledge of the handlers inspecting the cargo. We found that when an observer attended the inspection to monitor procedures, 80% of the planted snakes were located. Without an attending observer present, 70% of the planted snakes were discovered, but only after such plantings had become a routine procedure. Prior to the routine planting of snakes, efficacy was nearly 50% less (38%). The reasons some planted snakes were missed by the dog teams were split between: an insufficient search pattern by the handler, or the dog giving no discernable indication that a snake was present.

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