Habitat use by Myotis yumanensis and Tadarida brasiliensis mexicana in south San Francisco Bay wetlands: An acoustic study

摘要: HABITAT USE BY Myotis yumanensis AND Tadarida brasiliensis mexicana IN SOUTH SAN FRANCISCO BAY WETLANDS: AN ACOUSTIC STUDY By Theresa Marie Brickley Research on bat habitat use within coastal estuaries is limited. The purposes of my study were to determine whether Yuma myotis (Myotis yumanensis) and Mexican free-tailed bats (Tadarida mexicana) differentiate between open water marsh saline brackish habitats examine climatic factors are correlated with general activity tidal height foraging the two species. I recorded echolocation sequences over 30 survey nights in Alviso, California. Two Anabat II ® detectors randomly deployed each night salt or marsh. identified M. T. b. four feeding buzzes Additionally, logged air temperature wind speed per hour, percent moonlight visibility night, at 15-min intervals. 1,896 sequences, 845 from 983 mexicana. For both species, there was a significant difference frequency occurrence mean number versus for but not habitats. Furthermore, demonstrated greater preference than water. Although call increased higher lower visibility, presence/absence calls species could be predicted three variables. Mean did differ without results increase our knowledge about provide important information enhance conservation wetlands.