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How Some Insects Detect and Avoid Being Eaten by Bats: Tactics and Countertactics of Prey and Predator
The aim with this review is to present the complex interactions between echolocating bats and insects with bat-detecting ears and show how these interactions may be advantageous for predator or prey.
Underwater noise from three types of offshore wind turbines: estimation of impact zones for harbor porpoises and harbor seals.
- J. Tougaard, O. D. Henriksen, L. Miller
- Environmental ScienceThe Journal of the Acoustical Society of America
- 4 June 2009
Underwater noise was recorded from three different types of wind turbines in Denmark and Sweden during normal operation and noise is considered incapable of masking acoustic communication by seals and porpoises.
Echolocation by two foraging harbour porpoises (Phocoena phocoena)
The lag time in the search and the initial part of the approach phase seems to be long enough for the porpoise to process echo information before emitting the next click (pulse mode), however, it is assumed that during the buzz lag times are too short for pulse mode processing.
Sperm whale clicks: directionality and source level revisited.
- B. Møhl, M. Wahlberg, P. Madsen, L. Miller, A. Surlykke
- PhysicsThe Journal of the Acoustical Society of America
Previously published properties of sperm whale clicks underestimate the capabilities of the sound generator and therefore cannot falsify the Norris and Harvey theory.
Arctiid moth clicks can degrade the accuracy of range difference discrimination in echolocating big brown bats, Eptesicus fuscus
- L. Miller
- BiologyJournal of Comparative Physiology A
- 1 May 1991
Four big brown bats born and raised in captivity were trained using the Yes/No psychophysical method to report whether a virtual sonar target was at a standard distance or not, and clicks presented for the very first time could startle naive bats to different degrees depending on the individual.
Ultra-High Foraging Rates of Harbor Porpoises Make Them Vulnerable to Anthropogenic Disturbance
Echolocation signals of the bat Eptesicus serotinus recorded using a vertical microphone array: effect of flight altitude on searching signals
- M. E. Jensen, L. Miller
- Physics, Environmental ScienceBehavioral Ecology and Sociobiology
- 3 December 1999
It is demonstrated that flight altitude significantly influences the structure of sonar signals from E. serotinus and is cautioned the use of ground recordings to fully describe the echolocation signals of high-flying bats.
Biosonar, dive, and foraging activity of satellite tracked harbor porpoises (Phocoena phocoena)
This study presents bioacoustic recordings in combination with movements and diving behavior of three free-ranging harbor porpoises in Danish waters to show behavioral adaptability necessary for survival in a complex coastal environment and confirm that wildbors use more intense clicks than captive animals.
THE CLICK‐SOUNDS OF NARWHALS (MONODON MONOCEROS) IN INGLEFIELD BAY, NORTHWEST GREENLAND
We studied the sounds of narwhals (Monodon monoceros) foraging in the open waters in Northwest Greenland. We used a linear, vertical array of three hydrophones (depth 10 m, 30 m, 100 m) with a fourth…
Echolocation in two very small bats from Thailand Craseonycteris thonglongyai and Myotis siligorensis
- A. Surlykke, L. Miller, B. Møhl, B. B. Andersen, J. Christensen-Dalsgaard, Morten Buhl Jørgensen
- PhysicsBehavioral Ecology and Sociobiology
- 1 July 1993
It is argued that the signal resemblance is due to the similarity in size and hunting behavior of the two bats both hunting insects in open areas, and that the sweep rate in this frequency range may now increase to twice the maximum rate that the vocal cords can produce directly.