| effects of trapping and subsequent short-term confinement stress on plasma corticosterone in the brown treesnake (boiga irregularis) on guam. | the effects of capture in a live trap and subsequent handling stress on plasma concentrations of corticosterone and other sex steroids were examined in wild male and female brown treesnakes (boiga irregularis), an introduced species on guam that has been implicated in the extirpation or decline of many of that island's vertebrate species. males and females that spent 1 night in a trap had plasma levels of corticosterone about four and two times higher, respectively, than those of the respective ... | 2001 | 11703076 |
| risk assessment of an acetaminophen baiting program for chemical control of brown tree snakes on guam: evaluation of baits, snake residues, and potential primary and secondary hazards. | the brown tree snake (boiga irregularis) is a significant ecological, agricultural, and economic pest on guam. acetaminophen has recently been identified as a promising snake toxicant. subsequent experimentation has shown that acetaminophen-mouse baits are readily consumed by and acutely toxic to browntree snakes. before implementing an island-wide acetaminophen-mouse baiting program for the reducton of brown tree snake populations,the potential risks to nontarget wildlife must be evaluated. qua ... | 2002 | 12322757 |
| aerosolized essential oils and individual natural product compounds as brown treesnake repellents. | chemical irritants useful as repellents for brown treesnakes (boiga irregularis) were identified. exposure to various compounds produced a range of intensities for locomotory behavior in snakes. essential oils comprised of 10 g liter-1 solutions of cedarwood, cinnamon, sage, juniper berry, lavender and rosemary each were potent snake irritants. brown treesnakes exposed to a 2-s burst of aerosol of these oils exhibited prolonged, violent undirected locomotory behavior. in contrast, exposure to a ... | 2002 | 12192901 |
| population boundaries and genetic diversity in the endangered mariana crow (corvus kubaryi). | the mariana crow (corvus kubaryi) is an endangered species that is restricted to the islands of guam and rota in the mariana archipelago. predation by the introduced brown tree snake (boiga irregularis) has decimated bird populations on guam, and the crow population there is the last wild remnant of the endemic forest avifauna. the population on guam is critically endangered and, despite intensive management, the population has continued to decline. additional management options include intermix ... | 1999 | 10434415 |
| risks to infants on guam from bites of the brown tree snake (boiga irregularis). | the brown tree snake, boiga irregularis, is abundant on guam and commonly invades human habitations. data on emergency room visits on guam document a high frequency of snakebites on guam. over 50% of the emergency room visits for snakebite involved children less than 4 years old. records exist of 4 infants, 1, 2, 5, and 10 months old, who displayed significant symptoms after being bitten, while sleeping, by snakes. two infants developed respiratory problems within a few hours and required medica ... | 1990 | 2372089 |
| stimulus control of predatory behavior in the brown tree snake (boiga irregularis). iv. effect of mammalian blood. | brown tree snakes (boiga irregularis) from guam were exposed to mammalian (rattus norvegicus) blood on cotton-tipped applicators. water and other control substances were similarly presented. all trials lasted 60 s, and the dependent variable was the number of tongue flicks emitted by the snake during the trial. in five experiments, b. irregularis responded with greater numbers of tongue flicks to blood than to control substances. this is the first study to reveal an ophidian response to internal ... | 1992 | 1586355 |
| determination of whole-body rotenone residues in the brown tree snake (boiga irregularis). | the brown tree snake (boiga irregularis) is an introduced pest in guam, responsible for extensive agricultural damage, the extinction of several bird species, and severe and frequent electrical power outages. rotenone, a naturally occurring pesticide, has been investigated as a possible chemical control agent. an analytical method was developed to assess whole body rotenone residues ranging in concentration from 0.035 to 250 microg g(-)(1) in snakes. the method employed ethyl acetate extraction ... | 2000 | 10888529 |
| quantitation of pyrethrum residues in brown tree snakes. | a reversed-phase solid-phase extraction-gas chromatography (spe-gc)-electron capture detection method is developed to quantitate individual rethrin residues in pyrethrum-exposed brown tree snakes. aliquots (6 g) of homogenized snake tissue are extracted with 10 ml acetonitrile. the rethrins are recovered from the acetonitrile extract and concentrated using c8 spe. the rethrins are eluted from the spe column with pentane, evaporated to near dryness, and reconstituted to 1 ml with 1-propanol. indi ... | 1999 | 9987852 |