Digital Ocean Abstracts
Long-range
acoustic detection and tracking of the humpback whale Hawaii-Alaska
migration
Abileah, R.
Martin, D.
Lewis, S.D.
Gisiner, B.
SRI Int., Menlo Park, CA;
This paper appeared in: OCEANS
'96. MTS/IEEE. 'Prospects for the 21st Century'. Conference Proceedings
Meeting Date: 09/23/1996
-09/26/1996
Publication Date: 23-26 Sep 1996
Location: Fort Lauderdale, FL
, USA
On page(s): 373-377 vol.1
Volume: 1,
References Cited: 7
Number of Pages: 4 vol. (1564+vii+145)
INSPEC Accession Number: 5527088
Abstract:
In recent years the Navy has provided the
scientific community with increased access to the long-range underwater Sound
Surveillance System (SOSUS). One of the first applications of this system was to
monitor the migratory behavior of acoustically active pelagic whales (e.g.,
blue, humpback, finback). In 1995 the authors compared SOSUS detections of
humpback whales with the positions of satellite telemetry-tagged humpbacks. The
results suggest that SOSUS can reliably track whale migratory patterns by remote
and non-intrusive real-time coverage of large areas of ocean that would be
impossible to monitor by any other means. They also discuss the possibility of
using SOSUS to estimate whale populations by “turnstile” monitoring of whales
passing through a selected portion of the migratory path
Monitoring high-seas fisheries with long-range passive acoustic sensors
Abileah, R.
Lewis, D.
SRI Int., Menlo Park, CA;
This paper appeared in: OCEANS
'96. MTS/IEEE. 'Prospects for the 21st Century'. Conference Proceedings
Meeting Date: 09/23/1996
-09/26/1996
Publication Date: 23-26 Sep 1996
Location: Fort Lauderdale, FL
, USA
On page(s): 378-382 vol.1
Volume: 1,
References Cited: 1
Number of Pages: 4 vol. (1564+vii+145)
INSPEC Accession Number: 5527089
Abstract:
The decline of the world's major fisheries
has spurred international conservation efforts. Toward this goal, various
technological means of monitoring fishing have been implemented. The authors
report on experiments with passive acoustic listening, using the US Navy's Sound
Surveillance System (SOSUS). They describe some of the results obtained in a
series of experiments over the 1992-1995 period on driftnet fishing (now banned
by international treaty), salmon poaching in the North Pacific, and trawlers in
the Bering Sea “Donut Hole”
Use of high resolution space
imagery to monitor the abundance, distribution, and migration patterns of
marine mammal populations
Abileah, R.
SRI Int., Menlo Park, CA;
This paper appeared in: OCEANS,
2001. MTS/IEEE Conference and Exhibition
Meeting Date: 11/05/2001
-11/08/2001
Publication Date: 2001
Location: Honolulu, HI
, USA
On page(s): 1381-1387 vol.3
Volume: 3,
References Cited: 8
Number of Pages: 4 vol.(lxv+lxi+2714)
INSPEC Accession Number: 7231325
Abstract:
Aerial surveys are routinely used to study
marine mammal populations. The resolution of imagery from commercial satellites
has improved to the point where individual marine mammals can be detected. It
may therefore be possible to perform remote sensing of marine mammal populations
from space. This paper presents an initial assessment of detectability. A simple
signal and noise model is developed to predict the signal-to-noise ratio (SNR)
for a whale-like target. SNR is calculated for three cases: detection limited by
sensor quantization noise ("best case"); detection in real noise, using one
spectral band image; and detection in real noise, using a two-band noise
reduction technique. An Ikonos satellite image was used for a realistic noise
spectrum. The calculations show that a canonical target of length =14 in and
average spectral reflectivity can be detected up to a depth of 24 m. Thus a case
can be made for using satellites to monitor marine mammal abundance and
geographical distributions, and to observe migratory patterns in remote areas