scholarly journals Echolocation behaviour of the big brown bat (Eptesicus fuscus) in an obstacle avoidance task of increasing difficulty

2014 ◽  
Vol 217 (16) ◽  
pp. 2876-2884 ◽  
Author(s):  
S. Sandig ◽  
H.-U. Schnitzler ◽  
A. Denzinger
Keyword(s):  
Obstacle Avoidance ◽  
Eptesicus Fuscus ◽  
Avoidance Task ◽  
Big Brown Bat

Visual cues enhance obstacle avoidance in echolocating bats

2021 ◽  
pp. jeb.241968
Author(s):  
Te K. Jones ◽  
Cynthia F. Moss
Keyword(s):  
Obstacle Avoidance ◽  
Visual Information ◽  
Visual Cues ◽  
Behavioral Responses ◽  
Avoidance Task ◽  
Auditory Cues ◽  
Avoidance Behaviors ◽  
Big Brown Bat ◽  
Sensory Modalities

Studies have shown that bats are capable of using visual information for a variety of purposes, including navigation and foraging, but the relative contributions of visual and auditory modalities in obstacle avoidance has yet to be fully investigated, particularly in laryngeal echolocating bats. A first step requires a characterization of behavioral responses to different combinations of sensory cues. Here we quantify the behavioral responses of the insectivorous big brown bat, Eptesicus fuscus, in an obstacle avoidance task offering different combinations of auditory and visual cues. To do so, we utilize a new method that eliminates the confounds typically associated with testing bat vision and precludes auditory cues. We find that the presence of visual and auditory cues together enhances bats’ avoidance response to obstacles compared to cues requiring either vision or audition alone. Analysis of flight and echolocation behaviors, such as speed and call rate, did not vary significantly under different obstacle conditions, and thus are not informative indicators of a bat's response to obstacle stimulus type. These findings advance the understanding of the relative importance of visual and auditory sensory modalities in guiding obstacle avoidance behaviors.

scholarly journals Formation Tracking Control and Obstacle Avoidance of Unicycle-Type Robots Guaranteeing Continuous Velocities

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4374
Author(s):  
Jose Bernardo Martinez ◽  
Hector M. Becerra ◽  
David Gomez-Gutierrez
Keyword(s):  
Obstacle Avoidance ◽  
Tracking Control ◽  
Global Coordinate System ◽  
Avoidance Task ◽  
Time Varying ◽  
Control Laws ◽  
Formation Tracking ◽  
Control Scheme ◽  
First Time ◽  
Hierarchical Scheme

In this paper, we addressed the problem of controlling the position of a group of unicycle-type robots to follow in formation a time-varying reference avoiding obstacles when needed. We propose a kinematic control scheme that, unlike existing methods, is able to simultaneously solve the both tasks involved in the problem, effectively combining control laws devoted to achieve formation tracking and obstacle avoidance. The main contributions of the paper are twofold: first, the advantages of the proposed approach are not all integrated in existing schemes, ours is fully distributed since the formulation is based on consensus including the leader as part of the formation, scalable for a large number of robots, generic to define a desired formation, and it does not require a global coordinate system or a map of the environment. Second, to the authors’ knowledge, it is the first time that a distributed formation tracking control is combined with obstacle avoidance to solve both tasks simultaneously using a hierarchical scheme, thus guaranteeing continuous robots velocities in spite of activation/deactivation of the obstacle avoidance task, and stability is proven even in the transition of tasks. The effectiveness of the approach is shown through simulations and experiments with real robots.

Eptesicus fuscus (Big brown bat)

1970 ◽  
pp. 45-47
Author(s):  
T. C. Hsu ◽  
Kurt Benirschke
Keyword(s):  
Eptesicus Fuscus ◽  
Big Brown Bat

Seasonal and Sexual Variation in Metabolism, Thermoregulation, and Hormones in the Big Brown Bat (Eptesicus fuscus)

2018 ◽  
Vol 91 (1) ◽  
pp. 705-715 ◽  
Author(s):  
Christopher S. Richardson ◽  
Tim Heeren ◽  
Thomas H. Kunz
Keyword(s):  
Eptesicus Fuscus ◽  
Sexual Variation ◽  
Big Brown Bat

scholarly journals Experimental challenge of a North American bat species, big brown bat ( Eptesicus fuscus ), with SARS‐CoV‐2

2020 ◽  
Author(s):  
Jeffrey S. Hall ◽  
Susan Knowles ◽  
Sean W. Nashold ◽  
Hon S. Ip ◽  
Ariel E. Leon ◽  
...  
Keyword(s):  
North American ◽  
Eptesicus Fuscus ◽  
Big Brown Bat ◽  
Experimental Challenge

Disproportionate Sex Ratio in the Big Brown Bat (Eptesicus fuscus)

1980 ◽  
Vol 104 (2) ◽  
pp. 367 ◽  
Author(s):  
Allen Kurta ◽  
John O. Matson
Keyword(s):  
Sex Ratio ◽  
Eptesicus Fuscus ◽  
Big Brown Bat
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