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Flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey
Bioluminescence, which occurs in approximately 80% of the world's mesopelagic fauna, can take the form of a low-intensity continuous glow (e.g. for counter-illumination or signalling) or fast repetitions of brighter anti-predatory flashes. The southern elephant seal (SES) is a major consumer of...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Company of Biologists Ltd
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7322542/ https://www.ncbi.nlm.nih.gov/pubmed/32430464 http://dx.doi.org/10.1242/jeb.222810 |
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author | Goulet, Pauline Guinet, Christophe Campagna, Claudio Campagna, Julieta Tyack, Peter Lloyd Johnson, Mark |
author_facet | Goulet, Pauline Guinet, Christophe Campagna, Claudio Campagna, Julieta Tyack, Peter Lloyd Johnson, Mark |
author_sort | Goulet, Pauline |
collection | PubMed |
description | Bioluminescence, which occurs in approximately 80% of the world's mesopelagic fauna, can take the form of a low-intensity continuous glow (e.g. for counter-illumination or signalling) or fast repetitions of brighter anti-predatory flashes. The southern elephant seal (SES) is a major consumer of mesopelagic organisms, in particular the abundant myctophid fish, yet the fine-scale relationship between this predator's foraging behaviour and bioluminescent prey remains poorly understood. We hypothesised that brief, intense light emissions should be closely connected with prey strikes when the seal is targeting bioluminescent prey that reacts by emitting anti-predator flashes. To test this, we developed a biologging device containing a fast-sampling light sensor together with location and movement sensors to measure simultaneously anti-predator bioluminescent emissions and the predator's attack motions with a 20 ms resolution. Tags were deployed on female SES breeding at Kerguelen Islands and Península Valdés, Argentina. In situ light levels in combination with duration of prey capture attempts indicated that seals were targeting a variety of prey types. For some individuals, bioluminescent flashes occurred in a large proportion of prey strikes, with the timing of flashes closely connected with the predator's attack motion, suggestive of anti-predator emissions. Marked differences across individuals and location indicate that SES do exploit bioluminescent organisms but the proportion of these in the diet varies widely with location. The combination of wideband light and acceleration data provides new insight into where and when different prey types are encountered and how effectively they might be captured. |
format | Online Article Text |
id | pubmed-7322542 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Company of Biologists Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-73225422020-07-01 Flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey Goulet, Pauline Guinet, Christophe Campagna, Claudio Campagna, Julieta Tyack, Peter Lloyd Johnson, Mark J Exp Biol Research Article Bioluminescence, which occurs in approximately 80% of the world's mesopelagic fauna, can take the form of a low-intensity continuous glow (e.g. for counter-illumination or signalling) or fast repetitions of brighter anti-predatory flashes. The southern elephant seal (SES) is a major consumer of mesopelagic organisms, in particular the abundant myctophid fish, yet the fine-scale relationship between this predator's foraging behaviour and bioluminescent prey remains poorly understood. We hypothesised that brief, intense light emissions should be closely connected with prey strikes when the seal is targeting bioluminescent prey that reacts by emitting anti-predator flashes. To test this, we developed a biologging device containing a fast-sampling light sensor together with location and movement sensors to measure simultaneously anti-predator bioluminescent emissions and the predator's attack motions with a 20 ms resolution. Tags were deployed on female SES breeding at Kerguelen Islands and Península Valdés, Argentina. In situ light levels in combination with duration of prey capture attempts indicated that seals were targeting a variety of prey types. For some individuals, bioluminescent flashes occurred in a large proportion of prey strikes, with the timing of flashes closely connected with the predator's attack motion, suggestive of anti-predator emissions. Marked differences across individuals and location indicate that SES do exploit bioluminescent organisms but the proportion of these in the diet varies widely with location. The combination of wideband light and acceleration data provides new insight into where and when different prey types are encountered and how effectively they might be captured. The Company of Biologists Ltd 2020-05-19 /pmc/articles/PMC7322542/ /pubmed/32430464 http://dx.doi.org/10.1242/jeb.222810 Text en © 2020. Published by The Company of Biologists Ltd http://creativecommons.org/licenses/by/4.0This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. |
spellingShingle | Research Article Goulet, Pauline Guinet, Christophe Campagna, Claudio Campagna, Julieta Tyack, Peter Lloyd Johnson, Mark Flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey |
title | Flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey |
title_full | Flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey |
title_fullStr | Flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey |
title_full_unstemmed | Flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey |
title_short | Flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey |
title_sort | flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7322542/ https://www.ncbi.nlm.nih.gov/pubmed/32430464 http://dx.doi.org/10.1242/jeb.222810 |
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