Target Detection, Shape Discrimination, and Signal Characteristics of an Echolocationg False Killer Whale (Pseudorca crassidens)
This study demonstrated the ability of a false killer whale (Pseudorca crassidens) to discriminate between two targets and investigated the parameters of the whale's emitted signals for changes related to test conditions. Target detection performance comparable to the bottlenose dolphin's...
Main Authors: | , , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1992
|
Subjects: | |
Online Access: | http://www.dtic.mil/docs/citations/ADA262931 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA262931 |
id |
ftdtic:ADA262931 |
---|---|
record_format |
openpolar |
spelling |
ftdtic:ADA262931 2023-05-15T17:03:28+02:00 Target Detection, Shape Discrimination, and Signal Characteristics of an Echolocationg False Killer Whale (Pseudorca crassidens) Brill, R. L. Pawloski, J. L. Helweg, D. A. Au, W. W. Moore, P. W. NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA 1992-09 text/html http://www.dtic.mil/docs/citations/ADA262931 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA262931 en eng http://www.dtic.mil/docs/citations/ADA262931 Approved for public release; distribution is unlimited. Document partially illegible. DTIC AND NTIS Biology Biological Oceanography Acoustic Detection and Detectors *MARINE BIOLOGY *SONAR *WHALES *DOLPHINS(MAMMALS) TEST AND EVALUATION REPRINTS RATIOS HIGH FREQUENCY PARAMETERS COMPARISON ACOUSTIC SIGNALS TARGET DETECTION TAR AQUATIC ANIMALS TARGET STRENGTH UNDERWATER LEARNING BANDWIDTH DISCRIMINATION NOISE SHAPE ANALYSIS OF VARIANCE ACOUSTIC DETECTION SPHERES ECHOES BROADBAND PSEUDORCA CRASSIDENS TURSIOPS TRUNCATUS PE62435N WUDN688674 Text 1992 ftdtic 2016-02-22T09:38:58Z This study demonstrated the ability of a false killer whale (Pseudorca crassidens) to discriminate between two targets and investigated the parameters of the whale's emitted signals for changes related to test conditions. Target detection performance comparable to the bottlenose dolphin's (Tursiops truncatus) has previously been reported for echolocating false killer whales. No other echolocation capabilities have been reported. A false killer whale, naive to conditioned echolocation tasks, was initially trained to detect a cylinder in a go/no go procedure over ranges of 3 to 8 m. The transition from a detection task was readily achieved by introducing a spherical comparison tar- get. Finally, the cylinder was successfully compared to spheres of two different sizes and target strengths. Multivariate analyses were used to evaluate the parameters of emitted signals. Duncan's multiple range tests showed significant decreases (df = 185, p much much more 0.05) in both source level and bandwidth in the transition from detection to discrimination. Analysis of variance revealed a significant decrease in the number of clicks over test conditions F(5,26) = 5.23, p < 0.0001). These data suggest that the whale relied on cues relevant to target shape as well as target strength, that changes in source level and bandwidth were task-related, that the decrease in clicks was associated with learning experience, and that Pseudorca's ability to discriminate shapes using echolocation may be comparable to that of Tursiops truncatus. Pub. in Jnl. of Acoustical Society of America, v92 n3 p1324-1330 Sep 1992. Text Killer Whale Defense Technical Information Center: DTIC Technical Reports database |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Biology Biological Oceanography Acoustic Detection and Detectors *MARINE BIOLOGY *SONAR *WHALES *DOLPHINS(MAMMALS) TEST AND EVALUATION REPRINTS RATIOS HIGH FREQUENCY PARAMETERS COMPARISON ACOUSTIC SIGNALS TARGET DETECTION TAR AQUATIC ANIMALS TARGET STRENGTH UNDERWATER LEARNING BANDWIDTH DISCRIMINATION NOISE SHAPE ANALYSIS OF VARIANCE ACOUSTIC DETECTION SPHERES ECHOES BROADBAND PSEUDORCA CRASSIDENS TURSIOPS TRUNCATUS PE62435N WUDN688674 |
spellingShingle |
Biology Biological Oceanography Acoustic Detection and Detectors *MARINE BIOLOGY *SONAR *WHALES *DOLPHINS(MAMMALS) TEST AND EVALUATION REPRINTS RATIOS HIGH FREQUENCY PARAMETERS COMPARISON ACOUSTIC SIGNALS TARGET DETECTION TAR AQUATIC ANIMALS TARGET STRENGTH UNDERWATER LEARNING BANDWIDTH DISCRIMINATION NOISE SHAPE ANALYSIS OF VARIANCE ACOUSTIC DETECTION SPHERES ECHOES BROADBAND PSEUDORCA CRASSIDENS TURSIOPS TRUNCATUS PE62435N WUDN688674 Brill, R. L. Pawloski, J. L. Helweg, D. A. Au, W. W. Moore, P. W. Target Detection, Shape Discrimination, and Signal Characteristics of an Echolocationg False Killer Whale (Pseudorca crassidens) |
topic_facet |
Biology Biological Oceanography Acoustic Detection and Detectors *MARINE BIOLOGY *SONAR *WHALES *DOLPHINS(MAMMALS) TEST AND EVALUATION REPRINTS RATIOS HIGH FREQUENCY PARAMETERS COMPARISON ACOUSTIC SIGNALS TARGET DETECTION TAR AQUATIC ANIMALS TARGET STRENGTH UNDERWATER LEARNING BANDWIDTH DISCRIMINATION NOISE SHAPE ANALYSIS OF VARIANCE ACOUSTIC DETECTION SPHERES ECHOES BROADBAND PSEUDORCA CRASSIDENS TURSIOPS TRUNCATUS PE62435N WUDN688674 |
description |
This study demonstrated the ability of a false killer whale (Pseudorca crassidens) to discriminate between two targets and investigated the parameters of the whale's emitted signals for changes related to test conditions. Target detection performance comparable to the bottlenose dolphin's (Tursiops truncatus) has previously been reported for echolocating false killer whales. No other echolocation capabilities have been reported. A false killer whale, naive to conditioned echolocation tasks, was initially trained to detect a cylinder in a go/no go procedure over ranges of 3 to 8 m. The transition from a detection task was readily achieved by introducing a spherical comparison tar- get. Finally, the cylinder was successfully compared to spheres of two different sizes and target strengths. Multivariate analyses were used to evaluate the parameters of emitted signals. Duncan's multiple range tests showed significant decreases (df = 185, p much much more 0.05) in both source level and bandwidth in the transition from detection to discrimination. Analysis of variance revealed a significant decrease in the number of clicks over test conditions F(5,26) = 5.23, p < 0.0001). These data suggest that the whale relied on cues relevant to target shape as well as target strength, that changes in source level and bandwidth were task-related, that the decrease in clicks was associated with learning experience, and that Pseudorca's ability to discriminate shapes using echolocation may be comparable to that of Tursiops truncatus. Pub. in Jnl. of Acoustical Society of America, v92 n3 p1324-1330 Sep 1992. |
author2 |
NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA |
format |
Text |
author |
Brill, R. L. Pawloski, J. L. Helweg, D. A. Au, W. W. Moore, P. W. |
author_facet |
Brill, R. L. Pawloski, J. L. Helweg, D. A. Au, W. W. Moore, P. W. |
author_sort |
Brill, R. L. |
title |
Target Detection, Shape Discrimination, and Signal Characteristics of an Echolocationg False Killer Whale (Pseudorca crassidens) |
title_short |
Target Detection, Shape Discrimination, and Signal Characteristics of an Echolocationg False Killer Whale (Pseudorca crassidens) |
title_full |
Target Detection, Shape Discrimination, and Signal Characteristics of an Echolocationg False Killer Whale (Pseudorca crassidens) |
title_fullStr |
Target Detection, Shape Discrimination, and Signal Characteristics of an Echolocationg False Killer Whale (Pseudorca crassidens) |
title_full_unstemmed |
Target Detection, Shape Discrimination, and Signal Characteristics of an Echolocationg False Killer Whale (Pseudorca crassidens) |
title_sort |
target detection, shape discrimination, and signal characteristics of an echolocationg false killer whale (pseudorca crassidens) |
publishDate |
1992 |
url |
http://www.dtic.mil/docs/citations/ADA262931 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA262931 |
genre |
Killer Whale |
genre_facet |
Killer Whale |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA262931 |
op_rights |
Approved for public release; distribution is unlimited. Document partially illegible. |
_version_ |
1766057335169482752 |