talk at american cetacean society, april 6, 2005 observing cetaceans from pioneer seamount sfsu...
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Talk at American Cetacean Society, April 6, 2005
Observing Cetaceans from Pioneer Seamount
SFSU Pacific Oceanography ProjectMichael Hoffman, Carl Vuosalo, and Roger Bland, Physics and Astronomy
Department and RTC
Newell Garfield, Geosciences Dept and RTC
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Talk at American Cetacean Society, April 6, 2005
SFSU Pacific Oceanography ProjectMichael Hoffman, Carl Vuosalo, and Roger Bland, Physics and
Astronomy Department and RTCNewell Garfield, Geosciences Dept and RTC
1. History (and Fate) of Pioneer Seamount
2. Looking at the Data
3. Species
4. Results of Blue Whale call measurement.
5. The mystery of the 52 Hz Whale
6. Conclusions
Observing Cetaceans from Pioneer Seamount
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Talk at American Cetacean Society, April 6, 2005
PIONEER SEAMOUNT OBSERVATORY
Talk at American Cetacean Society, April 6, 2005
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Talk at American Cetacean Society, April 6, 2005
MAVERICK’S BREAK
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Talk at American Cetacean Society, April 6, 2005
MISSILE-TRACKING STATION
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Talk at American Cetacean Society, April 6, 2005
MISSILE-TRACKING STATION
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Talk at American Cetacean Society, April 6, 2005
MISSILE-TRACKING STATION
THE RON H. BROWN
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Talk at American Cetacean Society, April 6, 2005
Acoustic Temperature of Ocean Climate (ATOC) Experiment
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Talk at American Cetacean Society, April 6, 2005
ATOC Acoustic Sources
PIONEER SEAMOUNT KAUAI
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Talk at American Cetacean Society, April 6, 2005
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Talk at American Cetacean Society, April 6, 2005
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Talk at American Cetacean Society, April 6, 2005
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Talk at American Cetacean Society, April 6, 2005
Pioneer
Seamount
1 MHz BW
4 analog signals @
1 kHz ea
Pillar Point; digitize, buffer data
Pac Bell ADSL
PMEL NOAA, Newport, Or
internet ftp
2 hrs = 63 MB
SFSU Archive
www.physics.sfsu.edu/
~seamountThe World
20 GB/month
How do we get the sound?
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Talk at American Cetacean Society, April 6, 2005
Raw Data
time0
pres
sure
0
pres
sure
0
10x
3 minutes
1 second
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Talk at American Cetacean Society, April 6, 2005
How do we look at the sound?
• Spectrograms show us the different tones found in a recording of sound.
time0
15 min
freq
uenc
y
500 Hz
0
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Talk at American Cetacean Society, April 6, 2005
Naval Postgraduate School Source Deployments
RAFOS Frequency -Swept Sources
time0
15 min
freq
uenc
y
500 Hz
0
broadband (experimental)
narrowband
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Talk at American Cetacean Society, April 6, 2005
??
0
freq
uenc
y
500 Hz
0
freq
uenc
y
500 Hz
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Talk at American Cetacean Society, April 6, 2005
Earthquakes
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Talk at American Cetacean Society, April 6, 2005
Ship Sounds
1x
10x
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Talk at American Cetacean Society, April 6, 2005
Wind 1x
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Talk at American Cetacean Society, April 6, 2005
Animal Sounds
dolphin frequencies too high for PSM
100 Hz to several kHz
Pioneer S.M. sensitive up to 450 Hz
2 to 50 kHz
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Talk at American Cetacean Society, April 6, 2005
Animal SoundsSCALING: How low can you go?
50 Hz
512 Hz (high C)
10,000 Hz
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Talk at American Cetacean Society, April 6, 2005
10x
1x Can You Name that Whale?
time0
25 min
freq
uenc
y
500 Hz
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Talk at American Cetacean Society, April 6, 2005
Humpback Whales10x
1xMegaptera novaengliea
time0
25 min
freq
uenc
y
500 Hz
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Talk at American Cetacean Society, April 6, 2005
10x Can You Name that Whale?
time0
15 min
freq
uenc
y
500 Hz
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Talk at American Cetacean Society, April 6, 2005
Finback Whales10x
Balaenoptera physalus
time0
15 min
freq
uenc
y
500 Hz
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Talk at American Cetacean Society, April 6, 2005
Whale Zoo at Pioneer Seamount10x
time0 15 min
freq
uenc
y
500 Hz
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Talk at American Cetacean Society, April 6, 2005
Can You Name This Whale?10x
time0 15 min
freq
uenc
y
500 Hz
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Talk at American Cetacean Society, April 6, 2005
Blue Whale
“A” call “B” call
10xBalaenoptera musculus
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Talk at American Cetacean Society, April 6, 2005
The “A” call1x
10x
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Talk at American Cetacean Society, April 6, 2005
The “B” Call1x
10x
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Talk at American Cetacean Society, April 6, 2005
“C” Call10x
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Talk at American Cetacean Society, April 6, 2005
“A-B” Calling Sequence
C C C
A B A B A B A B A B A B A B A B A B A
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Talk at American Cetacean Society, April 6, 2005
Rapid “B” calling10x
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Talk at American Cetacean Society, April 6, 2005
“Maaa Ma”10x
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Talk at American Cetacean Society, April 6, 2005
“D” Calls
• Identified as Blue Whales calls by: Mark A. Mc Donald, John Calambokidis, Arthur Teranishi and John A. Hildebrand, The Acoustic calls of blue whales off California with gender data, Journ. J Acoustic Soc. of Am 109 (4), April 2001.
1x
10x
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Talk at American Cetacean Society, April 6, 2005
Blue Whales Talking?
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Talk at American Cetacean Society, April 6, 2005
10x
time0 15 min
freq
uenc
y
500 Hz
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Talk at American Cetacean Society, April 6, 2005
MATCHED-FILTER DETECTION
)(ts
)( tr
dttrtsc )()()( -10 -5 5 10
-0.2
0.2
0.4
0.6
0.8
1
dttrtsc )()()(
dttrtsc )()()(
Finding Calls Automatically
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Talk at American Cetacean Society, April 6, 2005
Finding Calls Automatically: 6,000
detections
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Talk at American Cetacean Society, April 6, 2005
6 pm PST 6 am PST
Day vs. Night time calling
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Talk at American Cetacean Society, April 6, 2005
Seasonal Variability
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Talk at American Cetacean Society, April 6, 2005
Curve fitting with linear chirp
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Talk at American Cetacean Society, April 6, 2005
Frequency and Slope Results:16.01Hz with 0.1 Hz variation
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Talk at American Cetacean Society, April 6, 2005
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Talk at American Cetacean Society, April 6, 2005
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Talk at American Cetacean Society, April 6, 2005
How Do they Do it?
Graphics from Aroyan, McDonald, Webb, Hildebrand, Clark, Laitman and Reidenberg, “Acoustic Models of Sound Production and Propagation,” in Hearing by Whales and Dolphins, ed. Au, Popper and Fay (Springer,2000) p. 409-469.
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Talk at American Cetacean Society, April 6, 2005
Time between calls: all “B” calls
“A-B” calling:T=128 sec=8 sec
“B-only” calling:T=50 sec=3 sec
T
A A AB B B
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Talk at American Cetacean Society, April 6, 2005
Watkins et al: the “52 Hz whale.
Twelve years of tracking 52-Hz whale calls from a unique source in the North Pacific
Watkins, Daher, George and Rodriguez (Woods Hole), Deep-Sea Research I 51 (2004) 1889
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Talk at American Cetacean Society, April 6, 2005
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Talk at American Cetacean Society, April 6, 2005
52 Hz (n=3)
69 Hz (n=4)
17 Hz (n=1)
35 Hz (n=2)
87 Hz (n=5)
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Talk at American Cetacean Society, April 6, 2005
52 Hz (n=3)
69 Hz (n=4)
17 Hz (n=1)
35 Hz (n=2)
87 Hz (n=5)
11sec
18sec
11sec
17sec
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Talk at American Cetacean Society, April 6, 2005
Rapid “B” calling
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Talk at American Cetacean Society, April 6, 2005
Rapid “B” calling
48.6 Hz (n=3)
64 Hz (n=3)
80 Hz (n=3)
32 Hz (n=3)
16 Hz (n=3)
48.1sec
47.3sec
48.1sec
48.2sec
48.5sec
48.2sec
47.3sec
47.3sec
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Talk at American Cetacean Society, April 6, 2005
The Three “B” Calls
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Talk at American Cetacean Society, April 6, 2005
Watkins et al: the “52 Hz whale.
Tracks of cetaceousperigrinations
You are here.
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Talk at American Cetacean Society, April 6, 2005
PioneerSeamount,
Oct. 11
StartAug. 22
2001
Aug. 30
Oct. 23
Dec. 7
Jan. 13
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Talk at American Cetacean Society, April 6, 2005
Conclusions
• We see a lot of interesting Blue Whale behavior just by listening.
• Blue Whales are better at singing than humans. (perfect pitch)
• They have very precise timing.
• We still know almost nothing about the role of these sounds in their lives.
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Talk at American Cetacean Society, April 6, 2005
Speculations/Questions
• The Whales seem to match their pitch to each other. Is the pitch set by some social-hierarchy?
• This frequency may be getting lower due to the population aging. (Whaling was outlawed in the ~1930’s so these are baby boomer Whales.)
• Whale society may not yet be ready for Finn-Blue intermarriage.
• What do you think?
E=Mc^2
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Talk at American Cetacean Society, April 6, 2005
Thanks!
This work would not have been possible without the help and guidance of the following people :
• The Whales.• The American Cetacean Society- SF Bay esp. Doreen Moser• Jim Mercer and University of Washington group.• Chris Fox, Dave Mellinger and Sharon Nieukirk at PMEL• Ching Sang-Chiu at the Naval Post-Graduate School, Monterey• Mark McDonald • The Physics and Astronomy Department and the Romberg Tiburon Center, San
Francisco State University.• Roger Bland at San Francisco State University. • AND ALL OF YOU !!AND ALL OF YOU !!