The Development of Chemosensory Attractants for Brown Tree Snakes

Abstract

Concern that the brown tree snake (Boiga irregularis) may be inadvertently transported in cargo shipments from Guam has resulted in management programs aimed at limiting the likelihood of snake stowaways. A primary tool used to capture snakes is a trap within which is a live mouse lure. Because using live mice presents logistical problems and concerns about animal care and use, it is desirable to develop an effective inanimate lure. Previous studies indicate that brown tree snakes are attracted to carrion odors. Here, we present the results of several pilot studies examining the attractiveness of cadaverine, dimethylamine, dimethyl disulfide, dimethyl sulfide, ethanethiol, trimethylamine, and putrescine (all components of carrion odor) to brown tree snakes. Results indicate that the major components of carrion odor, as defined by human perception, are not necessarily salient odors to brown tree snakes. We encourage a more systematic approach to the isolation of specific brown tree snake attractants by testing serial fractions of carrion odor for bioactivity.