Behavioral Context of Call Production by Eastern North Pacific Blue Whales
We assessed the behavioral context of calls produced by blue whales Balaenoptera musculus 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 observations. Approxim...
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ftdtic:ADA580707 2023-05-15T15:36:25+02:00 Behavioral Context of Call Production by Eastern North Pacific Blue Whales Oleson, Erin M Calambokidis, John Burgess, William C McDonald, Mark A LeDuc, Carrie A Hildebrand, John A CASCADIA RESEARCH COLLECTIVE OLYMPIA WA 2007-01-25 text/html http://www.dtic.mil/docs/citations/ADA580707 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA580707 en eng http://www.dtic.mil/docs/citations/ADA580707 Approved for public release; distribution is unlimited. DTIC Biological Oceanography Acoustics *AUDIO TONES *BEHAVIOR *WHALES CALIFORNIA CIRCADIAN RHYTHMS COASTAL REGIONS NORTH PACIFIC OCEAN PATTERNS SEX SHALLOW DEPTH BLUE WHALES FORAGING GROUP SIZE SEX BIAS SUCTION CUP TAGS WHALE CALLS WHALE SONGS REPRINTS Text 2007 ftdtic 2016-02-24T11:25:37Z We assessed the behavioral context of calls produced by blue whales Balaenoptera musculus 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 observations. 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 evident 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 calling 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. Published in Marine Ecology Progress Series, v330, p269-284, 25 January 2007. Text Balaenoptera musculus Defense Technical Information Center: DTIC Technical Reports database Lone ENVELOPE(11.982,11.982,65.105,65.105) Pacific |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Biological Oceanography Acoustics *AUDIO TONES *BEHAVIOR *WHALES CALIFORNIA CIRCADIAN RHYTHMS COASTAL REGIONS NORTH PACIFIC OCEAN PATTERNS SEX SHALLOW DEPTH BLUE WHALES FORAGING GROUP SIZE SEX BIAS SUCTION CUP TAGS WHALE CALLS WHALE SONGS REPRINTS |
spellingShingle |
Biological Oceanography Acoustics *AUDIO TONES *BEHAVIOR *WHALES CALIFORNIA CIRCADIAN RHYTHMS COASTAL REGIONS NORTH PACIFIC OCEAN PATTERNS SEX SHALLOW DEPTH BLUE WHALES FORAGING GROUP SIZE SEX BIAS SUCTION CUP TAGS WHALE CALLS WHALE SONGS REPRINTS Oleson, Erin M Calambokidis, John Burgess, William C McDonald, Mark A LeDuc, Carrie A Hildebrand, John A Behavioral Context of Call Production by Eastern North Pacific Blue Whales |
topic_facet |
Biological Oceanography Acoustics *AUDIO TONES *BEHAVIOR *WHALES CALIFORNIA CIRCADIAN RHYTHMS COASTAL REGIONS NORTH PACIFIC OCEAN PATTERNS SEX SHALLOW DEPTH BLUE WHALES FORAGING GROUP SIZE SEX BIAS SUCTION CUP TAGS WHALE CALLS WHALE SONGS REPRINTS |
description |
We assessed the behavioral context of calls produced by blue whales Balaenoptera musculus 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 observations. 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 evident 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 calling 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. Published in Marine Ecology Progress Series, v330, p269-284, 25 January 2007. |
author2 |
CASCADIA RESEARCH COLLECTIVE OLYMPIA WA |
format |
Text |
author |
Oleson, Erin M Calambokidis, John Burgess, William C McDonald, Mark A LeDuc, Carrie A Hildebrand, John A |
author_facet |
Oleson, Erin M Calambokidis, John Burgess, William C McDonald, Mark A LeDuc, Carrie A Hildebrand, John A |
author_sort |
Oleson, Erin M |
title |
Behavioral Context of Call Production by Eastern North Pacific Blue Whales |
title_short |
Behavioral Context of Call Production by Eastern North Pacific Blue Whales |
title_full |
Behavioral Context of Call Production by Eastern North Pacific Blue Whales |
title_fullStr |
Behavioral Context of Call Production by Eastern North Pacific Blue Whales |
title_full_unstemmed |
Behavioral Context of Call Production by Eastern North Pacific Blue Whales |
title_sort |
behavioral context of call production by eastern north pacific blue whales |
publishDate |
2007 |
url |
http://www.dtic.mil/docs/citations/ADA580707 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA580707 |
long_lat |
ENVELOPE(11.982,11.982,65.105,65.105) |
geographic |
Lone Pacific |
geographic_facet |
Lone Pacific |
genre |
Balaenoptera musculus |
genre_facet |
Balaenoptera musculus |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA580707 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766366765485391872 |