Extreme diving of beaked whales
- P. Tyack, Mark Johnson, N. A. Soto, A. Sturlese, P. Madsen
- Environmental ScienceJournal of Experimental Biology
- 1 November 2006
Using current models of breath-hold diving, it is inferred that beaked whales' natural diving behaviour is inconsistent with known problems of acute nitrogen supersaturation and embolism, and possible decompression problems are more likely to result from an abnormal behavioural response to sonar.
Ultra-High Foraging Rates of Harbor Porpoises Make Them Vulnerable to Anthropogenic Disturbance
- D. Wisniewska, Mark Johnson, P. Madsen
- Environmental ScienceCurrent Biology
- 6 June 2016
Behaviour and kinematics of continuous ram filtration in bowhead whales (Balaena mysticetus)
- M. Simon, Mark Johnson, P. Tyack, P. Madsen
- Environmental ScienceProceedings of the Royal Society B: Biological…
- 7 November 2009
It is concluded that a food niche of dense, slow-moving zooplankton prey has led balaenids to evolve locomotor and filtering systems adapted to work against a high drag at swimming speeds of less than 0.07 body length s−1 using a continuous fluking gait very different from that of nekton-feeding, aquatic predators.
Binary Switching of Calendar Cells in the Pituitary Defines the Phase of the Circannual Cycle in Mammals
- S. Wood, H. Christian, A. Loudon
- BiologyCurrent Biology
- 19 October 2015
Calling under pressure: short-finned pilot whales make social calls during deep foraging dives
- F. Jensen, Jacobo Marrero Pérez, Mark Johnson, N. A. Soto, P. Madsen
- Environmental ScienceProceedings of the Royal Society B: Biological…
- 22 October 2011
Energy content of calls is lower at depths where lungs are collapsed and where the air volume available for sound generation is limited by ambient pressure, showing that social calls may be important to maintain social ties for foraging animals, but may be impacted adversely by vessel noise.
Narrow Acoustic Field of View Drives Frequency Scaling in Toothed Whale Biosonar
- F. Jensen, Mark Johnson, M. Ladegaard, D. Wisniewska, P. Madsen
- PhysicsCurrent Biology
- 1 December 2018
Beaked whales
- P. Madsen, N. A. Soto, P. Tyack, Mark Johnson
- BiologyCurrent Biology
- 18 August 2014
Cognitive control of heart rate in diving harbor porpoises
- Siri L. Elmegaard, Mark Johnson, P. Madsen, B. I. McDonald
- BiologyCurrent Biology
- 21 November 2016
Anthropogenic noise causes body malformations and delays development in marine larvae
- N. A. de Soto, N. Delorme, J. Atkins, Sunkita Howard, James Williams, Mark Johnson
- Environmental ScienceScientific Reports
- 3 October 2013
First evidence that noise exposure during larval development produces body malformations in marine invertebrates is provided, suggesting that abnormalities and growth delays may also result from lower sound levels or discrete exposures during the D-stage, increasing the potential for routinely-occurring anthropogenic noise sources to affect recruitment of wild scallop larvae in natural stocks.
Deep-diving beaked whales dive together but forage apart
- Jesús Alcázar-Treviño, Mark Johnson, N. Aguilar de Soto
- PhysicsProceedings of the Royal Society B
- 6 January 2021
It is concluded that the close diving and vocal synchronization of beaked whale groups that quantitatively reduces predation risk has little impact on foraging performance.
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