J. W. S. Pringle (auth.), Prof. Dr. Hansjochem Autrum, Erwin's Orientierung der Tiere / Animal Orientation: Symposium in PDF

By J. W. S. Pringle (auth.), Prof. Dr. Hansjochem Autrum, Erwin Bünning, Karl v. Frisch, E. Hadorn, A. Kühn, E. Mayr, A. Pirson, J. Straub, H. Stubbe, W. Weidel (eds.)

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Read or Download Orientierung der Tiere / Animal Orientation: Symposium in Garmisch-Partenkirchen 17.–21. 9. 1962 PDF

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Extra info for Orientierung der Tiere / Animal Orientation: Symposium in Garmisch-Partenkirchen 17.–21. 9. 1962

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1313 from the \Voods Hole Oceanographic Institution. 28 JAMES M. MOULTON vibrations which can have any direct biological significance in the normal sense, and then that we learn how that spectrum is perceived - whether through the general integument, through a lateral line, through ears or statocysts, by substrate vibrations or bristle quivering, or by conbinations of all of these. For all of us, the sound production and perception of marine organisms have presented many unanswered questions as to the orientation of marine animals to sound.

Oo(colculoletl) t Olld firs! • - __•. •. ~.. _ •.. ~_~ ••~~ GO "0 . '-""t~ o /lOO ¢OO GOO Time 6'00 TOOO t msec 30 \ -=== 0 ,zoo '''00 ~ ~ ~ msec Fig. 2. Plot of hat's position in time vs. th e pulse-to-pulse interval and th e pulse dura t ion for search , approach , a nd termin a l phases of a yt pica l fruit-fl y pursuit (not the one in fig. I) . 2 msec. Presumably, during this phase, the bat has turned toward its prey. There then follows a terminal phase, leading up to the capture of the insect, which lasts from 150 t o 214 msec in 7 analyzed pursuits consisting of from 27 to 39 pulses.

These data are compatible with the hypotheses of PYE and KAY even though the use of beat notes cannot be implied. References GRIFFIN, D. : Bat sounds under natural conditions, with evidence for echolocation of insect prey. J. expo ZooI. 123,435-466 (1953). - Listening in the dark. : Yale Univ. Press. 1958. - F. A. WEBSTER and C. R. MICHAEL: The echolocation of fiying insects by bats. Animal Behav. 8, 141-151 (1960). , and D. R. GRIFFIN: The sensitivity of echolocation in bats. BioI. Bull. 114, 10-22 (1958).

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