Behavioral context of call production by eastern North Pacific blue whales

We assessed the behavioral context of calls produced by blue whales Balaenoptera mus- culus off the California coast based on acoustic, behavioral, and dive data obtained through acoustic recording tags, sex determination from tissue sampling, and coordinated visual and acoustic obser- vations. Approximately one-third of 38 monitored blue whales vocalized, with sounds categorized into 3 types: (1) low-frequency pulsed A and tonal B calls, in either rhythmic repetitive song sequences or as intermittent, singular calls; (2) downswept D calls; and (3) highly variable amplitude- or frequency-modulated calls. Clear patterns of behavior, sex, and group size are evident for some call types. Only males were documented producing AB calls, with song produced by lone, traveling blue whales, and singular AB calls were more typically produced by whales in pairs; D calls were heard from both sexes during foraging, commonly from individuals within groups. The sex bias evi- dent in AB callers suggests that these calls probably play a role in reproduction, even though the calls are produced year-round. All calls are produced at shallow depth, and calling whales spend more time at shallow depths than non-calling whales, suggesting that a cost may be incurred during D call- ing, as less time is spent feeding at deeper depths. This relationship between calling and depth may predict the traveling behavior of singing blue whales, as traveling whales do not typically dive to deep depths and therefore would experience little extra energetic cost related to the production of long repetitive song bouts while moving between foraging areas.

[1]  D. Croll,et al.  High feeding costs limit dive time in the largest whales. , 2002, The Journal of experimental biology.

[2]  John A. Hildebrand,et al.  Biogeographic characterisation of blue whale song worldwide: using song to identify populations , 2023, J. Cetacean Res. Manage..

[3]  Christopher G. Fox,et al.  Diel variation in blue whale calls recorded in the eastern tropical Pacific , 2005, Animal Behaviour.

[4]  Peter L. Tyack,et al.  A digital acoustic recording tag for measuring the response of wild marine mammals to sound , 2003 .

[5]  M. Mcdonald DIFAR HYDROPHONES APPLIED TO WHALE RESEARCH , 2009 .

[6]  Mark A. McDonald Difar hydrophone usage in whale research , 2004 .

[7]  W. Watkins,et al.  Activities and underwater sounds of fin whales [Balaenoptera physalus] , 1981 .

[8]  P. O. Thompson,et al.  20-Hz pulses and other vocalizations of fin whales, Balaenoptera physalus, in the Gulf of California, Mexico. , 1990, The Journal of the Acoustical Society of America.

[9]  M. Bérubé,et al.  INTERACTIONS OF SINGING HUMPBACK WHALES WITH OTHER MALES , 2001 .

[10]  K. Stafford TWO TYPES OF BLUE WHALE CALLS RECORDED IN THE GULF OF ALASKA , 2003 .

[11]  J. Hildebrand,et al.  Blue and fin whales observed on a seafloor array in the northeast pacific. , 1995, The Journal of the Acoustical Society of America.

[12]  John Calambokidis,et al.  MOVEMENTS OF NORTH PACIFIC BLUE WHALES DURING THE FEEDING SEASON OFF SOUTHERN CALIFORNIA AND THEIR SOUTHERN FALL MIGRATION1 , 1999 .

[13]  S. F. H.,et al.  The Blue Whale , 1925, Nature.

[14]  E. Brinton VERTICAL MIGRATION AND AVOIDANCE CAPABILITY OF EUPHAUSIIDS IN THE CALIFORNIA CURRENT , 1967, Limnology and oceanography.

[15]  K. Stafford,et al.  Geographic and seasonal variation of blue whale calls in the North Pacific , 2023, J. Cetacean Res. Manage..

[16]  H. E. Winn,et al.  The song of the humpback whale Megaptera novaeangliae in the West Indies , 1978 .

[17]  D. Webb,et al.  ORIENTATION BY MEANS OF LONG RANGE ACOUSTIC SIGNALING IN BALEEN WHALES * , 1971, Annals of the New York Academy of Sciences.

[18]  P. Clapham,et al.  HUMPBACK WHALE SONGS AS INDICATORS OF MIGRATION ROUTES , 1990 .

[19]  R. Payne,et al.  BEHAVIOR OF BOWHEAD WHALES, BALAENA MYSTICETUS, SUMMERING IN THE BEAUFORT SEA: A DESCRIPTION! , 1985 .

[20]  Robert J. Urick,et al.  Principles of underwater sound , 1975 .

[21]  W A Kuperman,et al.  Matched-field processing, geoacoustic inversion, and source signature recovery of blue whale vocalizations. , 2000, The Journal of the Acoustical Society of America.

[22]  R. Hewitt,et al.  Blue whale habitat and prey in the California Channel Islands , 1998 .

[23]  P. Clapham The social and reproductive biology of Humpback Whales: an ecological perspective , 1996 .

[24]  Peggy L. Edds,et al.  CHARACTERISTICS OF FINBACK BALAENOPTERA PHYSALUS VOCALIZATIONS IN THE ST. LAWRENCE ESTUARY , 1988 .

[25]  C. Clark,et al.  Acoustic monitoring on a humpback whale (Megaptera novaeangliae) feeding ground shows continual singing into late spring , 2004, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[26]  David K. Mellinger,et al.  Ishmael : 1.0 user's guide ; Ishmael : integrated system for holistic multi-channel acoustic exploration and localization , 2002 .

[27]  C. Clark,et al.  Blue whale (Balaenoptera musculus) sounds from the North Atlantic. , 2003, The Journal of the Acoustical Society of America.

[28]  Anil Kumar,et al.  Acoustic communication in birds , 2003 .

[29]  John A. Hildebrand,et al.  Blue Whale (Balaenoptera musculus) Diel Call Patterns Offshore of Southern California , 2005 .

[30]  J Calambokidis,et al.  The acoustic calls of blue whales off California with gender data. , 2001, The Journal of the Acoustical Society of America.

[31]  J. Barlow,et al.  Acoustic detections of singing humpback whales (Megaptera novaeangliae) in the eastern North Pacific during their northbound migration. , 1999, The Journal of the Acoustical Society of America.

[32]  John Calambokidis,et al.  Kinematics of foraging dives and lunge-feeding in fin whales , 2006, Journal of Experimental Biology.

[33]  B. Howe,et al.  Acoustic and satellite remote sensing of blue whale seasonality and habitat in the Northeast Pacific , 2004 .

[34]  David K. Mellinger,et al.  Future directions for acoustic marine mammal surveys : stock assessment and habitat use : report of a workshop held in La Jolla, California, 20-22 November 2002 , 2003 .

[35]  J Calambokidis,et al.  Sink or swim: strategies for cost-efficient diving by marine mammals. , 2000, Science.

[36]  Shannon Rankin,et al.  Vocalisations of Antarctic blue whales, Balaenoptera musculus intermedia, recorded during the 2001/2002 and 2002/2003 IWC/SOWER circumpolar cruises, Area V, Antarctica , 2005 .

[37]  Peter L Tyack,et al.  Sound production by North Atlantic right whales (Eubalaena glacialis) in surface active groups. , 2005, The Journal of the Acoustical Society of America.

[38]  C. Mayo,et al.  Humpback Whale Songs on a North Atlantic Feeding Ground , 1987 .

[39]  D. McSweeney,et al.  NORTH PACIFIC HUMPBACK WHALE SONGS: A COMPARISON OF SOUTHEAST ALASKAN FEEDING GROUND SONGS WITH HAWAIIAN WINTERING GROUND SONGS , 1989 .

[40]  G. J. Marshall,et al.  Crittercam : An animal-borne imaging and data logging system , 1998 .

[41]  John A. Hildebrand,et al.  Acoustic Models of Sound Production and Propagation , 2000 .

[42]  S. Mesnick,et al.  Interfamilial characterization of a region of the ZFX and ZFY genes facilitates sex determination in cetaceans and other mammals , 2005, Molecular ecology.

[43]  David A. Demer,et al.  An integrated approch to the foraging ecology of marine birds and mammals , 1998 .

[44]  R. Payne,et al.  Songs of Humpback Whales , 1971, Science.

[45]  P. O. Thompson,et al.  UNDERWATER SOUNDS OF BLUE WHALES, BALAENOPTERA MUSCULUS, IN THE GULF OF CALIFORNIA, MEXICO , 1996 .