| imidacloprid toxicity impairs spatial memory of echolocation bats through neural apoptosis in hippocampal ca1 and medial entorhinal cortex areas. | it has been reported that the decimation of honey bees was because of pesticides of imidacloprid. the imidacloprid is a wildly used neonicotinoid insecticide. however, whether imidacloprid toxicity interferes with the spatial memory of echolocation bats is still unclear. thus, we compared the spatial memory of formosan leaf-nosed bats, hipposideros terasensis, before and after chronic treatment with a low dose of imidacloprid. we observed that stereotyped flight patterns of echolocation bats tha ... | 2016 | 26966783 |
| hibernation in warm hibernacula by free-ranging formosan leaf-nosed bats, hipposideros terasensis, in subtropical taiwan. | the subtropical formosan leaf-nosed bats, hipposideros terasensis (hipposideridae), show little activity during winter. it has never been determined whether in winter they exhibit hibernation and multi-day periods of low body temperature. the objectives of this study were to understand the winter activity pattern of h. terasensis and to examine whether it enters hibernation during winter. we monitored the skin temperature (t (sk)) of nine free-ranging h. terasensis by attaching temperature-sensi ... | 2011 | 20714727 |
| roost selection by formosan leaf-nosed bats (hipposideros armiger terasensis). | patterns of roost use by formosan leaf-nosed bats (hipposideros armiger terasensis) were studied from november 1998 to april 2000. structural characteristics, microclimates, and disturbance levels of 17 roosts used by h. a. terasensis and 15 roosts either used by other bat species (2) or not occupied by any bat species were compared. roosts used by these bats were significantly larger in size and had greater areas covered by water compared to unused roosts. entrances of active roosts were more l ... | 2003 | 12951409 |
| hypothermic neuroprotections in the brain of an echolocation bat, hipposideros terasensis. | the present study aimed to investigate how bats protect their brain in a hypothermic situation. formosan leaf-nosed bats (hipposideros terasensis) were used in this study and treated under three conditions: room temperature (25±1°c), low temperature (4±1°c), and hibernation. the reactive oxygen species (ros) levels in the blood and apoptosis-related proteins in the brain tissue were assessed and then compared among those bats under three conditions. our results showed that the blood ros levels o ... | 2017 | 28914739 |
| effects of imidacloprid, a neonicotinoid insecticide, on the echolocation system of insectivorous bats. | imidacloprid, a widely used neonicotinoid insecticide, has led to a decline in the honey bee population worldwide. an invertebrate insect prey with neonicotinoid toxicity can adversely affect insectivores, such as echolocating bats. the aim of the current study was to examined whether imidacloprid toxicity may interfere echolocation system such as vocal, auditory, orientation, and spatial memory systems in the insectivorous bat. by comparing the ultrasound spectrum, auditory brainstem-evoked pot ... | 2020 | 31973875 |
| echolocation and flight behavior of the bat hipposideros armiger terasensis in a structured corridor. | in this study, the echolocation and flight behaviors of the taiwanese leaf-nosed bat (hipposideros armiger terasensis), which uses constant-frequency (cf) biosonar signals combined with a frequency-modulated (fm) sweep, are compared with those of the big brown bat (eptesicus fuscus), which uses fm signals alone. the cf-fm bat flew through a corridor bounded by vertical poles on either side, and the inter-pole spacing of the walls was manipulated to create different echo flow conditions. the bat' ... | 2018 | 30180698 |
| doppler-shift compensation in the taiwanese leaf-nosed bat (hipposideros terasensis) recorded with a telemetry microphone system during flight. | biosonar behavior was examined in taiwanese leaf-nosed bats (hipposideros terasensis; cf-fm bats) during flight. echolocation sounds were recorded using a telemetry microphone mounted on the bat's head. flight speed and three-dimensional trajectory of the bat were reconstructed from images taken with a dual high-speed video camera system. bats were observed to change the intensity and emission rate of pulses depending on the distance from the landing site. frequencies of the dominant second harm ... | 2005 | 16419835 |
| intra-individual variation in the vocalized frequency of the taiwanese leaf-nosed bat, hipposideros terasensis, influenced by conspecific colony members. | we examined the intra-individual variation in resting frequency of the constant-frequency component of the second harmonic of the pulse (f (rest)) over 4 years in a laboratory colony of the taiwanese leaf-nosed bat (hipposideros terasensis). patterns of change in f (rest) were observed when individuals were added to or removed from the colony so that we investigated whether f (rest) was affected by neighboring colony members. f (rest) of each bat continually showed a long-term gradual change thr ... | 2006 | 16538514 |