Evasive responses of American shad (Alosa sapidissima) to ultrasonic stimuli
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This study demonstrates that freely swimming, American shad show a variety of behaviors in response to pure tone, ultrasonic stimulation, which depends primarily on stimulus amplitude and, to a lesser degree, on stimulus frequency, direction and duration.Abstract:
Many species of odontocete cetaceans (toothed whales) use high frequency clicks (60–170 kHz) to identify objects in their environment, including potential prey. Behavior and physiological studies have shown that American shad, Alosa sapidissima, can detect ultrasonic signals to at least 180 kHz. This study demonstrates that freely swimming, American shad show a variety of behaviors in response to pure tone, ultrasonic stimulation. This response depends primarily on stimulus amplitude and, to a lesser degree, on stimulus frequency, direction and duration.read more
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References
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The Hawaiian Spinner Dolphin
TL;DR: The authors begin with a description of the spinner dolphin species, its morphology and systematics, and then examines the ocean environment, the organization of dolphin populations, and the way this school-based society of mammals uses shorelines for rest and instruction of the young.
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TL;DR: Costa et al. as discussed by the authors used acoustic modality to detect low-frequency calls of whales at ranges of hundreds and sometimes thousands of kilometers (Costa 1993; Clark 1994b, 1995).
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Ultrasound detection by clupeiform fishes
TL;DR: It is demonstrated, using auditory brainstem response (ABR), that at least one additional species, the gulf menhaden (Brevoortia patronus), is able to detect ultrasound, while several other species including the bay anchovy, scaled sardine, and Spanish sardines only detect sounds to about 4 kHz.
Journal ArticleDOI
Measurement of echolocation signals of the Atlantic bottlenose dolphin, Tursiops truncatus Montagu, in open waters
TL;DR: The echlocation signals of two Atlantic bottlenose dolphins were measured while the animals were involved in a target‐detection experiment conducted in open waters, and the time intervals between successive pulses in a pulse train were found to be highly variable.
Journal ArticleDOI
The physiology of bottlenose dolphins (Tursiops truncatus): heart rate, metabolic rate and plasma lactate concentration during exercise
TL;DR: The energetic profile of the exercising bottlenose dolphin resembles that of a relatively sedentary mammal if the exercise variables defined for terrestrial mammals are used, however, the energetic cost of swimming for this cetacean is low in comparison to that of other aquatic and semi-aquatic mammals.