Eptesicus Fuscus Research Papers - Academia.edu (original) (raw)

... Patches in the Roosting and Foraging Ecology ... of isolated forest patches were not used as often as edges of forest patches close to mature forest, and the close adherence of northern long-earedbats and Indiana bats to hedgerows... more

... Patches in the Roosting and Foraging Ecology ... of isolated forest patches were not used as often as edges of forest patches close to mature forest, and the close adherence of northern long-earedbats and Indiana bats to hedgerows while commuting suggests that ...

Clayoquot Sound on the west coast of Vancouver Island, B.C. is an area of high-profile land-use conflict. In 1995, local scientific and management groups recognized bats as an important component of forest ecosystems. With almost no... more

Clayoquot Sound on the west coast of Vancouver Island, B.C. is an area of high-profile land-use conflict. In 1995, local scientific and management groups recognized bats as an important component of forest ecosystems. With almost no existing bat information for this area, we began studies of the bat community, with the goal of inventorying the bat community and identifying critical

Neurons in the inferior colliculus (IC) of the awake big brown bat, Eptesicus fuscus, were examined for joint frequency and latency response properties which could register the timing of the bat's frequency-modulated (FM) biosonar echoes.... more

Neurons in the inferior colliculus (IC) of the awake big brown bat, Eptesicus fuscus, were examined for joint frequency and latency response properties which could register the timing of the bat's frequency-modulated (FM) biosonar echoes. Best frequencies (BFs) range from 10 kHz to 100 kHz with 50% tuning widths mostly from 1 kHz to 8 kHz. Neurons respond with one discharge per 2-ms tone burst or FM stimulus at a characteristic latency in the range of 3–45 ms, with latency variability (SD) of 50 μs to 4–6 ms or more. BF distribution is related to biosonar signal structure. As observed previously, on a linear frequency scale BFs appear biased to lower frequencies, with 20–40 kHz overrepresented. However, on a hyperbolic frequency (linear period) scale BFs appear more uniformly distributed, with little overrepresentation. The cumulative proportion of BFs in FM1 and FM2 bands reconstructs a scaled version of the spectrogram of FM broadcasts. Correcting FM latencies for absolute BF latencies and BF time-in-sweep reveals a subset of IC cells which respond dynamically to the timing of their BFs in FM sweeps. Behaviorally, Eptesicus perceives echo delay and phase with microsecond or even submicrosecond accuracy and resolution, but even with use of phase-locked FM and tone-burst stimuli the cell-by-cell precision of IC time-frequency registration seems inadequate by itself to account for the temporal acuity exhibited by the bat.

Install bat houses on the south, southeast, or southwest side of a building, where they will be exposed to sunlight more than seven hours per day. Cover the exterior of the house, or the exterior top half, with dark or medium shades of... more

Install bat houses on the south, southeast, or southwest side of a building, where they will be exposed to sunlight more than seven hours per day. Cover the exterior of the house, or the exterior top half, with dark or medium shades of water-based, exterior-grade paint or stain, or tar paper to increase the house’s ability to trap radiant energy. While male bats occupy cooler houses, females need the heat provided by sunlight to maintain warm nurseries for their pups. Place several bat houses in a variety of areas, such as all four sides of an infrequently used barn to increase the likelihood of occupancy. Avoid placing bat houses on tree trunks, as shade will reduce the exposure of the house to sunlight and increase vulnerability to climbing predators, such as raccoons and housecats.