Echolocation activity of harbour porpoises (phocoena phocoena) around an offshore gas-production platform-drilling-rig complex.
Harbour porpoises (Phocoena p. phocoena L.) are vocal animals and their activity can be monitored effectively using underwater, autonomous, passive-acoustic cetacean-click detectors called T-PODs [e.g. 1, 2, 3]. The characteristics of porpoise-echolocation clicks have been described in great depth o...
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ftloughboroughun:oai:figshare.com:article/9549416 2023-05-15T17:59:13+02:00 Echolocation activity of harbour porpoises (phocoena phocoena) around an offshore gas-production platform-drilling-rig complex. V.L.G. Todd I.B. Todd Paul Lepper N.C. Tregenza 2009-01-01T00:00:00Z https://figshare.com/articles/conference_contribution/Echolocation_activity_of_harbour_porpoises_phocoena_phocoena_around_an_offshore_gas-production_platform-drilling-rig_complex_/9549416 unknown 2134/9544 https://figshare.com/articles/conference_contribution/Echolocation_activity_of_harbour_porpoises_phocoena_phocoena_around_an_offshore_gas-production_platform-drilling-rig_complex_/9549416 CC BY-NC-ND 4.0 CC-BY-NC-ND Mechanical Engineering not elsewhere classified untagged Text Conference contribution 2009 ftloughboroughun 2022-01-01T20:41:48Z Harbour porpoises (Phocoena p. phocoena L.) are vocal animals and their activity can be monitored effectively using underwater, autonomous, passive-acoustic cetacean-click detectors called T-PODs [e.g. 1, 2, 3]. The characteristics of porpoise-echolocation clicks have been described in great depth over the last forty years [4-10]; clicks can be emitted singularly or in groups known as “trains”. There is a linear correlation between porpoise-echolocation pulse intervals and target range [11, 12] with a peak in repetition rate as the animal nears the target, analogous to the “terminal buzzes” repeatedly observed in echolocating bats [13]. Determination of a successful prey-capture event in wild echolocating bats has been achieved effectively [e.g. 14] but for wild porpoises, underwater filming of prey-capture attempts is extremely tedious. Moreover, in the wild, without visual confirmation, any correlation between porpoise buzz activity and feeding success cannot be assumed a priori without experimental evidence, because a high buzz rate may simply be associated with increased foraging effort for the same amount of prey. Nonetheless, it is conceivable that by using acoustics alone, a proxy of feeding activity could be surmised by examining the relative incidence of increasing click rates, emitted during range-locking echolocation behaviour, and the associated decreasing interval between clicks, known as “inter-click-intervals (ICI)” [see 2]. A link between feeding and decreasing ICI has been established for foraging Blainville's beaked whales, Mesoplodon densirostris [15] and harbour porpoises [16]. Conference Object Phocoena phocoena Loughborough University: Figshare |
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Loughborough University: Figshare |
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topic |
Mechanical Engineering not elsewhere classified untagged |
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Mechanical Engineering not elsewhere classified untagged V.L.G. Todd I.B. Todd Paul Lepper N.C. Tregenza Echolocation activity of harbour porpoises (phocoena phocoena) around an offshore gas-production platform-drilling-rig complex. |
topic_facet |
Mechanical Engineering not elsewhere classified untagged |
description |
Harbour porpoises (Phocoena p. phocoena L.) are vocal animals and their activity can be monitored effectively using underwater, autonomous, passive-acoustic cetacean-click detectors called T-PODs [e.g. 1, 2, 3]. The characteristics of porpoise-echolocation clicks have been described in great depth over the last forty years [4-10]; clicks can be emitted singularly or in groups known as “trains”. There is a linear correlation between porpoise-echolocation pulse intervals and target range [11, 12] with a peak in repetition rate as the animal nears the target, analogous to the “terminal buzzes” repeatedly observed in echolocating bats [13]. Determination of a successful prey-capture event in wild echolocating bats has been achieved effectively [e.g. 14] but for wild porpoises, underwater filming of prey-capture attempts is extremely tedious. Moreover, in the wild, without visual confirmation, any correlation between porpoise buzz activity and feeding success cannot be assumed a priori without experimental evidence, because a high buzz rate may simply be associated with increased foraging effort for the same amount of prey. Nonetheless, it is conceivable that by using acoustics alone, a proxy of feeding activity could be surmised by examining the relative incidence of increasing click rates, emitted during range-locking echolocation behaviour, and the associated decreasing interval between clicks, known as “inter-click-intervals (ICI)” [see 2]. A link between feeding and decreasing ICI has been established for foraging Blainville's beaked whales, Mesoplodon densirostris [15] and harbour porpoises [16]. |
format |
Conference Object |
author |
V.L.G. Todd I.B. Todd Paul Lepper N.C. Tregenza |
author_facet |
V.L.G. Todd I.B. Todd Paul Lepper N.C. Tregenza |
author_sort |
V.L.G. Todd |
title |
Echolocation activity of harbour porpoises (phocoena phocoena) around an offshore gas-production platform-drilling-rig complex. |
title_short |
Echolocation activity of harbour porpoises (phocoena phocoena) around an offshore gas-production platform-drilling-rig complex. |
title_full |
Echolocation activity of harbour porpoises (phocoena phocoena) around an offshore gas-production platform-drilling-rig complex. |
title_fullStr |
Echolocation activity of harbour porpoises (phocoena phocoena) around an offshore gas-production platform-drilling-rig complex. |
title_full_unstemmed |
Echolocation activity of harbour porpoises (phocoena phocoena) around an offshore gas-production platform-drilling-rig complex. |
title_sort |
echolocation activity of harbour porpoises (phocoena phocoena) around an offshore gas-production platform-drilling-rig complex. |
publishDate |
2009 |
url |
https://figshare.com/articles/conference_contribution/Echolocation_activity_of_harbour_porpoises_phocoena_phocoena_around_an_offshore_gas-production_platform-drilling-rig_complex_/9549416 |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_relation |
2134/9544 https://figshare.com/articles/conference_contribution/Echolocation_activity_of_harbour_porpoises_phocoena_phocoena_around_an_offshore_gas-production_platform-drilling-rig_complex_/9549416 |
op_rights |
CC BY-NC-ND 4.0 |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766167989377302528 |