We are pleased to announce the publication of the following article: Bowles, A.E., D.M. Grebner, W.B. Musser, J.S. Nash, and J.L. Crance. 2015. Disproportionate emission of bubble streams with killer whale biphonic calls: perspectives on production and function. JASA Express Letters 137(2): EL165-170. Abstract: Stereotyped pulsed calls were attributed to 11 killer whales (Orcinus orca) with and without synchronous bubble streams in three datasets collected from two facilities from 1993 to 2012. Calls with and without synchronous bubble streams and divergent overlapping high frequency components ("biphonic" vs "monophonic") were compared. Subjects produced bubbles significantly more often when calls had divergent high frequency components. However, acoustic features in one biphonic call shared by five subjects provided little evidence for an acoustic effect of synchronous bubble flow. Disproportionate bubbling supported other evidence that biphonic calls form a distinct category, but suggested a function in short-range communication. Ann E. Bowles, PhD Hubbs-SeaWorld Research Institute <mailto:abowles@hswri.org>abowles@hswri.org 50th_Logo.PNG Ann E. Bowles, PhD | Program Leader, Bioacoustics Hubbs-SeaWorld Research Institute 2595 Ingraham Street | San Diego | CA 92109 Phone: (619) 226-3870 | Fax: (619) 226-3944 <mailto:abowles@hswri.org>abowles@hswri.org | www.hswri.org The information transmitted (including attachments) is covered by the Electronic Communications Privacy Act, 18 U.S.C. 2510-2521, is intended only for the person(s) or entity/entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient(s) is prohibited. If you received this in error, please contact the sender and delete the material from any computer.