نتایج جستجو برای: dolphin echolocation
تعداد نتایج: 4021 فیلتر نتایج به سال:
Article history: Received 10 September 2012 Received in revised form 12 March 2013 Accepted 24 March 2013 Available online 23 April 2013
The ability of cetaceans to explore and interpret their world via echolocation has received considerable attention during recent years, and the resulting body of work has revealed a sophisticated cetacean echolocation system. In addition, a number of recent studies suggest that dolphins can relate information that they receive from vision with information that they obtain from echolocation when...
Observations suggest that dolphin sonars function well in the very shallow, reverberant, near-shore region of the ocean, and significantly out-perform man-made systems under such conditions. The echolocation characteristics of many small cetaceans have been measured directly and the high performance of biosonar systems is not in question, but explanations for their resolution, target detection,...
What is a dolphin? When you think of a dolphin you probably picture a bottlenose dolphin, Tursiops truncatus, the familiar star of oceanaria. But bottlenose dolphins are only one among sixtyseven living species in the fully aquatic mammalian order Cetacea and the diverse suborder Odontoceti (‘toothed whales’). In addition to possessing adult teeth, the many types of toothed whale are distinguis...
The probability of detecting echolocating delphinids on a near-seafloor sensor was estimated using two Monte Carlo simulation methods. One method estimated the probability of detecting a single click (cue counting); the other estimated the probability of detecting a group of delphinids (group counting). Echolocation click beam pattern and source level assumptions strongly influenced detectabili...
The causes of dolphin and whale stranding can often be difficult to determine. Because toothed whales rely on echolocation for orientation and feeding, hearing deficits could lead to stranding. We report on the results of auditory evoked potential measurements from eight species of odontocete cetaceans that were found stranded or severely entangled in fishing gear during the period 2004 through...
The present study describes the development and testing of a tool for dolphin research. This tool was able to visualize the dolphin echolocation signals as well as function as an acoustically operated "touch screen." The system consisted of a matrix of hydrophones attached to a semitransparent screen, which was lowered in front of an underwater acrylic panel in a dolphin pool. When a dolphin ai...
Bottlenose dolphin (Tursiops truncatus) echolocation resolution greatly exceeds measured beampattern and conventional hearing model performance. We explore the idea that teeth might aid conventional hearing. Nerve conduction requires neural delay lines, a requisite that might be met by unexplained specialised cell arrangements already reported. Jawbone resonance displays selectivity at 25-35 de...
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