37117 Document Published / External 30990 PSD- Cetacean Research Program (CRP) Publications Portfolio Project Completed 2017-08-31 Songs are distinct, patterned sounds produced by a variety of animals including baleen whales. Fin whale songs, which consist of short pulses repeated at regular interpulse intervals (IPIs), have been suggested as a tool to distinguish populations. Fin whale songs were analyzed from data collected from 2000-2012 in Southern California and from 2004-2010 in the Gulf of California using autonomous acoustic recorders. IPIs were measured for each identifiable song sequence during two random days of each month with recordings. Four distinct song types were identified: long doublet, short doublet, long triplet, and short triplet. Long and short doublets were the dominant songs in Southern California, while long and short triplets were dominant in the Gulf of California. An abrupt change in song type occurred in both areas during the monitoring period. We argue that each song type is unique to a population and these changes represent a shift in the primary population in the monitoring area. Occasional temporal and spatial song overlap indicated some exchange or visitation among populations. Fin whales appear to synchronize and gradually modify song rhythm over long time scales. A better understanding of the evolutionary and ecological importance of songs to fin whale populations is needed. A. Sirovic, E. M. Oleson, J. Buccowich, A. Rice and A. R. Bayless. Scientific Reports 2017 Vol. 7 Issue 1 DOI: 10.1038/s41598-017-09979-4 10.1038/s41598-017-09979-4 Journal article Acrobat Portable Document Format Published Co-Author 2017 Person Oleson, Erin M erin.oleson@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5712 9:00 a.m. - 5:00 p.m. Co-Author 2017 Person Bayless, Ali R ali.bayless@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5728 Unclassified The data used for the analyses presented in this paper belong to Scripps Institution of Oceanography and were not collected by NOAA. Contact Ana Sirovic (asirovic@ucsd.edu) to request data access. Contact Ana Sirovic (asirovic@ucsd.edu) to request data access. https://www.nature.com/articles/s41598-017-09979-4 gov.noaa.nmfs.inport:37117 Erin Oleson 2017-03-09T18:30:59 SysAdmin InPortAdmin 2022-08-09T17:11:04 2022-05-05 Pacific Islands Fisheries Science Center PIFSC 1845 Wasp Blvd. Honolulu HI 96818 USA 808-725-5300 https://www.pifsc.noaa.gov 8:00 a.m. - 4:30 p.m. 1001 Public No 2022-05-05 1 Year 2023-05-05