Collaborative Projects have their own page ... ...

Current Bat Projects

• Echolocation and behavioral reactions to sudden target movements (Prey removal — Signe+AS and Lutz+Connie)
• Emission of sonar signal through nostrils or mouth in Trachops cirrhosus (Line, AS)
• Analysing a new auditory scene in Eptesicus fuscus (Lasse?, AS, Cindy, Ben)
• Sonar beam directivity as a function of size and call frequency (Lasse, John AS)
• Correlation between habitat and echolocation calls in neo-tropical phyllostomid bats (Signe, AS)
• Head related transfer functions in bats (Ali, John Hallam)
• New models for the correlation between emitted intensity and target in echolocating bats (Ulrik, Signe, AS)
• Biomimetic robots orienting by echolocation (ChiRoPing home page)
• Relating head morphology (ear, mouth, nose) to echolocation features during prey capture in Myotis daubentonii and Noctilio leporinus (AS)
• Bats in pairs (Kayleigh, John)
• Beam shape in horseshoe bats (Rhinolophidae) (John, Kayleigh, AS)

  Related Projects involving bats less directly.

• Auditory brain stem response during echolocation in porpoises in collaboration with Meike Linnenschmidt and Magnus Wahlberg (Rasmus Sloth P.)
• Influence of wing and wind noise on moth hearing (John?, Matt (AS), Line)
• Sound production in moths (Matt, AS?, John)

Past Projects  

New method for estimating sonar beam directivity (Francesco and John H. in collaboration with Lasse, AS).

Guarato F., Hallam J., Jakobsen L., Surlykke, A. and Vanderelst, D. (2011) A method for estimating the orientation of a directional sound source from source directivity and multi-microphone recordings: principles and application. J. Acoust. Soc. Am. 129 (2): 1046—1058.

Significance of frequency alternation in Saccopteryx bilineata (John, Lasse, As)

Ratcliffe J.M., Jakobsen, L., Kalko, E.K.V., Surlykke, A. (2011) Frequency alternation and an offbeat rhythm indicate foraging behavior in the echolocating bat, Saccopteryx bilineata. J. Comp. Physiol. DOI 10.1007/s00359-011-0630-0.

Do fish with ultrasonic hearing react with evasive manoeuvres to dolphin sonar sounds? ( As)

Wilson, M., Schack, H.B., Madsen, P.T., Surlykke, A. Wahlberg, M. (2011) Directional escape behavior and energy detection in allis shad (Alosa alosa) exposed to ultrasonic clicks mimicking an approaching toothed whale. J.Exp.Biol. 214: 22—29. doi:10.1242/jeb.043323.

Directionality of the sonar beam of a nose emitting phyllostomid bat (Signe et al.)

Brinkløv, S., Jakobsen, L., Ratcliffe, J.M., Kalko, E.K.V., Surlykke, A. (2011) Echolocation call intensity and directionality in flying short-tailed fruit bats, Carollia perspicillata (Phyllostomidae) J. Acoust. Soc. Am. 129 (1): 427—435. DOI: 10.1121/1.3519396.

Very quiet ultrasound production in pyralid moths (as)

Takanashi, T., Nakano, R., Surlykke, A., Tatsuta, H., Tabata, J. Ishikawa, Y., Skals, N. (2010) Variation in Courtship Ultrasounds of Three Ostrinia Moths with Different Sex Pheromones. PLoS ONE 5(10): e13144. doi:10.1371/journal.pone.0013144.

Auditory scene analysis in echolocating bats (AS)

Moss, C.F., Surlykke, A. (2010) Probing the Natural Scene by Echolocation Frontiers of Behavioral Neuroscience, Special issue on Neuroethology. doi: 10.3389/fnbeh.2010.00033.

Influence of habitat and clutter on sonar sound intensity (Signe et al.)

Brinkløv, S., Kalko, E.K.V., Surlykke, A. (2010) Dynamic adjustment of biosonar intensity to habitat clutter in the bat Macrophyllum macrophyllum (Phyllostomidae) Behav. Ecol. Sociobiol. 64:1867—1874 DOI 10.1007/s00265-010-0998-9.

Widening the sonar sound beam in the last phases of the pursuit (Lasse AS)

Jakobsen, L., Surlykke, A. (2010) Vespertilionid bats control the width of their biosonar sound beam dynamically during prey pursuit PNAS. 107 (31) 13930—13935; doi:10.1073/pnas.1006630107.

Male moths make sounds to make females "freeze" to facilitate mating (AS)

Nakano, R., Takanashi, T., Skals, N., Surlykke, A., Ishikawa, Y. (2010) To females of a noctuid moth, male courtship songs are nothing more than bat echolocation calls. Biol. Lett. (2010) 6, 582—584. doi:10.1098/rsbl.2010.0058.
Nakano, R., Takanashi, T., Skals, N., Surlykke, A., Ishikawa, Y. (2010) Ultrasonic courtship songs of male Asian corn borer moths assist copulation attempts by making the females motionless. Physiol. Entomol. 35, 76—81.

Quiet sound production is much more common in moths than previously believed (AS)

Nakano, R., Takanashi, T., Fujii, T., Skals, N., Surlykke, A., Ishikawa, Y. (2009) Moths are not silent, but whisper ultrasonic courtship songs. J. Exp. Biol. 212: 4072—4078

Bats scan objects one-by-one by pointing their sonar beam directly at each object sequentially

Surlykke, A., Ghose, K., Moss, C.M. (2009) Acoustic scanning of natural scenes by echolocation in the big brown bat, Eptesicus fuscus. J. Exp. Biol. 212: 1011—1020.

Determination of sonar sound beam shape from bats flying freely in the wild. Revealed link between directivity and intensity

Surlykke, A., Pedersen, S.B., Jakobsen, L. (2009) Echolocating bats emit a highly directional sonar sound beam in the field. Proc. R. Soc. B 276: 853—860.

Emitted intensity in phyllostomid bats.

Brinkløv, S., Kalko, E.K.V., Surlykke, A. (2009) Intense echolocation calls from two "whispering" bats, Artibeus jamaicensis and Macrophyllum macrophyllum (Phyllostomidae). J. Exp. Biol. 212: 11—20.