Lip-reading in remote subjects: An attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals
A new mandibular sensor is presented here based on the use of a Hall sensor, attached to one mandible, opposite a magnet, attached to the other mandible. Changes in sensor voltage, proportional to magnetic field strength, and thus inter-mandibular angle, are recorded in a logger. This system was tes...
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Format: | Article in Journal/Newspaper |
Language: | English |
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2002
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Online Access: | https://oceanrep.geomar.de/id/eprint/3813/ https://oceanrep.geomar.de/id/eprint/3813/1/art_10.1007_s002270100659.pdf https://doi.org/10.1007/s002270100659 |
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ftoceanrep:oai:oceanrep.geomar.de:3813 2024-09-15T18:31:41+00:00 Lip-reading in remote subjects: An attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals Wilson, Rory P. Steinfurth, Antje Ropert-Coudert, Y. Kato, A. Kurita, M. 2002 text https://oceanrep.geomar.de/id/eprint/3813/ https://oceanrep.geomar.de/id/eprint/3813/1/art_10.1007_s002270100659.pdf https://doi.org/10.1007/s002270100659 en eng Springer https://oceanrep.geomar.de/id/eprint/3813/1/art_10.1007_s002270100659.pdf Wilson, R. P., Steinfurth, A., Ropert-Coudert, Y., Kato, A. and Kurita, M. (2002) Lip-reading in remote subjects: An attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals. Marine Biology, 140 . pp. 17-27. DOI 10.1007/s002270100659 <https://doi.org/10.1007/s002270100659>. doi:10.1007/s002270100659 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2002 ftoceanrep https://doi.org/10.1007/s002270100659 2024-09-04T05:04:40Z A new mandibular sensor is presented here based on the use of a Hall sensor, attached to one mandible, opposite a magnet, attached to the other mandible. Changes in sensor voltage, proportional to magnetic field strength, and thus inter-mandibular angle, are recorded in a logger. This system was tested on seven captive Adélie penguins (Pygoscelis adeliae) and three gentoo penguins (Pygoscelis papua) during: (1) feeding trials on land, where birds were given known quantities and types of food; and (2) trials in water where birds were allowed to swim and dive freely. In addition, six free-living Magellanic penguins (Spheniscus magellanicus) were equipped with the system for single foraging trips. Angular signatures were looked for in instances when both captive and free-living birds might open their beaks, and it was discovered that five major behaviours could be identified: ingestion, breathing, calling, head shaking and preening. Captive feeding trials showed that prey mass could be determined with reasonable accuracy (r 2=0.92), and there was some indication that prey type could be resolved if recording frequency were high enough. Vocalisations in Adélie penguins (arc calls) took <0.7 s for mean maximum beak angles of 4.2° (SD 1.3), and were distinguished by their relatively gradual change in beak angle and by their high degree of symmetry. Beak shakings were distinguishable by their short duration (multiple peaks of <0.5 s) and minimal maximum angle (<0.5°). Preening behaviour was apparent due to multiple decreasing peaks (angles <8°). Breathing could be subdivided into that during porpoising, where a characteristic double peak in beak angle was recorded, and that during normal surface rests between dives. During porpoising, only the primary peak (mean maximum beak angle 25.1°, SD 4.7) occurred when the bird was out of the water (mean maximum for second peak 5.9°, SD 4.1). During normal surface rests in free-living birds, breaths could be distinguished as a series of beak openings and closures, ... Article in Journal/Newspaper Pygoscelis adeliae Pygoscelis papua OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Marine Biology 140 1 17 27 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
A new mandibular sensor is presented here based on the use of a Hall sensor, attached to one mandible, opposite a magnet, attached to the other mandible. Changes in sensor voltage, proportional to magnetic field strength, and thus inter-mandibular angle, are recorded in a logger. This system was tested on seven captive Adélie penguins (Pygoscelis adeliae) and three gentoo penguins (Pygoscelis papua) during: (1) feeding trials on land, where birds were given known quantities and types of food; and (2) trials in water where birds were allowed to swim and dive freely. In addition, six free-living Magellanic penguins (Spheniscus magellanicus) were equipped with the system for single foraging trips. Angular signatures were looked for in instances when both captive and free-living birds might open their beaks, and it was discovered that five major behaviours could be identified: ingestion, breathing, calling, head shaking and preening. Captive feeding trials showed that prey mass could be determined with reasonable accuracy (r 2=0.92), and there was some indication that prey type could be resolved if recording frequency were high enough. Vocalisations in Adélie penguins (arc calls) took <0.7 s for mean maximum beak angles of 4.2° (SD 1.3), and were distinguished by their relatively gradual change in beak angle and by their high degree of symmetry. Beak shakings were distinguishable by their short duration (multiple peaks of <0.5 s) and minimal maximum angle (<0.5°). Preening behaviour was apparent due to multiple decreasing peaks (angles <8°). Breathing could be subdivided into that during porpoising, where a characteristic double peak in beak angle was recorded, and that during normal surface rests between dives. During porpoising, only the primary peak (mean maximum beak angle 25.1°, SD 4.7) occurred when the bird was out of the water (mean maximum for second peak 5.9°, SD 4.1). During normal surface rests in free-living birds, breaths could be distinguished as a series of beak openings and closures, ... |
format |
Article in Journal/Newspaper |
author |
Wilson, Rory P. Steinfurth, Antje Ropert-Coudert, Y. Kato, A. Kurita, M. |
spellingShingle |
Wilson, Rory P. Steinfurth, Antje Ropert-Coudert, Y. Kato, A. Kurita, M. Lip-reading in remote subjects: An attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals |
author_facet |
Wilson, Rory P. Steinfurth, Antje Ropert-Coudert, Y. Kato, A. Kurita, M. |
author_sort |
Wilson, Rory P. |
title |
Lip-reading in remote subjects: An attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals |
title_short |
Lip-reading in remote subjects: An attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals |
title_full |
Lip-reading in remote subjects: An attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals |
title_fullStr |
Lip-reading in remote subjects: An attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals |
title_full_unstemmed |
Lip-reading in remote subjects: An attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals |
title_sort |
lip-reading in remote subjects: an attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals |
publisher |
Springer |
publishDate |
2002 |
url |
https://oceanrep.geomar.de/id/eprint/3813/ https://oceanrep.geomar.de/id/eprint/3813/1/art_10.1007_s002270100659.pdf https://doi.org/10.1007/s002270100659 |
genre |
Pygoscelis adeliae Pygoscelis papua |
genre_facet |
Pygoscelis adeliae Pygoscelis papua |
op_relation |
https://oceanrep.geomar.de/id/eprint/3813/1/art_10.1007_s002270100659.pdf Wilson, R. P., Steinfurth, A., Ropert-Coudert, Y., Kato, A. and Kurita, M. (2002) Lip-reading in remote subjects: An attempt to quantify and separate ingestion, breathing and vocalisation in free-living animals. Marine Biology, 140 . pp. 17-27. DOI 10.1007/s002270100659 <https://doi.org/10.1007/s002270100659>. doi:10.1007/s002270100659 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s002270100659 |
container_title |
Marine Biology |
container_volume |
140 |
container_issue |
1 |
container_start_page |
17 |
op_container_end_page |
27 |
_version_ |
1810473425371660288 |