Respiration and Deep Diving in the Bottlenose Porpoise
- S. Ridgway, B. Scronce, J. Kanwisher
- Environmental ScienceScience
- 26 December 1969
A bottlenose porpoise was trained to dive untethered in the open ocean and to exhale into an underwater collecting funnel before surfacing from prescribed depths down to 300 meters. The animal was…
Cetacean sleep: An unusual form of mammalian sleep
- O. Lyamin, P. Manger, S. Ridgway, L. Mukhametov, J. Siegel
- Biology, PsychologyNeuroscience and Biobehavioral Reviews
- 1 October 2008
Dolphin lung collapse and intramuscular circulation during free diving: evidence from nitrogen washout.
- S. Ridgway, R. Howard
- BiologyScience
- 7 December 1979
The bottle-nosed dolphin is not protected by lung collapse from the decompression hazards of dives to depths shallower than 70 meters, so intramuscular nitrogen tensions after a schedule of repetitive ocean dives suggest.
Temporary threshold shift in bottlenose dolphins (Tursiops truncatus) exposed to mid-frequency tones.
- J. Finneran, D. Carder, C. E. Schlundt, S. Ridgway
- PhysicsJournal of the Acoustical Society of America
- 5 October 2005
Hearing thresholds in bottlenose dolphins are measured to suggest that a SEL of 195 dB re 1 microPa2 s is a reasonable threshold for the onset of TTS in dolphins and white whales exposed to midfrequency tones.
Auditory and behavioral responses of bottlenose dolphins (Tursiops truncatus) and a beluga whale (Delphinapterus leucas) to impulsive sounds resembling distant signatures of underwater explosions.
- J. Finneran, C. E. Schlundt, S. Ridgway
- PhysicsJournal of the Acoustical Society of America
- 22 June 2000
No temporary shifts in masked-hearing thresholds (MTTSs) had been observed at the highest impulse level generated, however, disruptions of the animals' trained behaviors began to occur at exposures corresponding to 5kg at 9.3 km and 5 kg at 1.6 km.
DOLPHIN THYROID AND ADRENAL HORMONES: CIRCULATING LEVELS IN WILD AND SEMIDOMESTICATED TURSIOPS TRUNCATUS, AND INFLUENCE OF SEX, AGE, AND SEASON
- D. J. Aubin, S. Ridgway, R. Wells, H. Rhinehart
- Biology
- 1996
Levels of both adrenal hormones were low in semidomesticated dolphins conditioned to present voluntarily their tails for blood sampling, an approach that appears to yield specimens representative of resting values for these constituents.
Can diving-induced tissue nitrogen supersaturation increase the chance of acoustically driven bubble growth in marine mammals?
- D. Houser, R. Howard, S. Ridgway
- Environmental ScienceJournal of Theoretical Biology
- 21 November 2001
It is demonstrated that the diving behavior of cetaceans prior to an intense acoustic exposure may increase the chance of rectified diffusion, and model results suggest that low-frequency rectification diffusion models need to be advanced, and the dive behavior of marine mammals of concern needs to be investigated to identify at-risk animals.
PORPOISE CLICKS FROM A SPERM WHALE NOSE—CONVERGENT EVOLUTION OF 130 KHZ PULSES IN TOOTHED WHALE SONARS?
- P. Madsen, D. Carder, K. Bedholm, S. Ridgway
- Biology
- 1 January 2005
Data is presented showing that the distantly related, and larger pygmy sperm whale Kogia breviceps (Kogiidae), that is a deep-diving, cephalopod-eating toothed whale, produce narrow-banded high frequency (NBHF) clicks identical to those of Phocoena and Cephalorhynchus, but the apparent functional convergence does not relate to anatomical or niche similarity.
Temporary shift in masked hearing thresholds in odontocetes after exposure to single underwater impulses from a seismic watergun.
- J. Finneran, C. E. Schlundt, Randall L. Dear, D. Carder, S. Ridgway
- PhysicsJournal of the Acoustical Society of America
- 4 June 2002
A behavioral response paradigm was used to measure masked underwater hearing thresholds in a bottlenose dolphin and a white whale before and after exposure to single underwater impulsive sounds produced from a seismic watergun to determine if a temporary shift in masked hearing thresholds occurred.
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