The copepod Calanus spp. (Calanidae) is repelled by polarized light
Both attraction and repulsion from linearly polarized light have been observed in zooplankton. A dichotomous choice experiment, consisting of plankton light traps deployed in natural waters at a depth of 30 m that projected either polarized or unpolarized light of the same intensity, was used to tes...
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ftpubmed:oai:pubmedcentral.nih.gov:5071912 2023-05-15T17:33:27+02:00 The copepod Calanus spp. (Calanidae) is repelled by polarized light Lerner, Amit Browman, Howard I. 2016-10-20 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5071912/ http://www.ncbi.nlm.nih.gov/pubmed/27762400 https://doi.org/10.1038/srep35891 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5071912/ http://www.ncbi.nlm.nih.gov/pubmed/27762400 http://dx.doi.org/10.1038/srep35891 Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/srep35891 2016-10-30T00:14:43Z Both attraction and repulsion from linearly polarized light have been observed in zooplankton. A dichotomous choice experiment, consisting of plankton light traps deployed in natural waters at a depth of 30 m that projected either polarized or unpolarized light of the same intensity, was used to test the hypothesis that the North Atlantic copepod, Calanus spp., is linearly polarotactic. In addition, the transparency of these copepods, as they might be seen by polarization insensitive vs. sensitive visual systems, was measured. Calanus spp. exhibited negative polarotaxis with a preference ratio of 1.9:1. Their transparency decreased from 80% to 20% to 30% in the unpolarized, partially polarized, and electric (e-) vector orientation domains respectively - that is, these copepods would appear opaque and conspicuous to a polarization-sensitive viewer looking at them under conditions rich in polarized light. Since the only difference between the two plankton traps was the polarization cue, we conclude that Calanus spp. are polarization sensitive and exhibit negative polarotaxis at low light intensities (albeit well within the sensitivity range reported for copepods). We hypothesize that Calanus spp. can use polarization vision to reduce their risk of predation by polarization-sensitive predators and suggest that this be tested in future experiments. Text North Atlantic Copepods PubMed Central (PMC) Scientific Reports 6 1 |
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Article Lerner, Amit Browman, Howard I. The copepod Calanus spp. (Calanidae) is repelled by polarized light |
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Article |
description |
Both attraction and repulsion from linearly polarized light have been observed in zooplankton. A dichotomous choice experiment, consisting of plankton light traps deployed in natural waters at a depth of 30 m that projected either polarized or unpolarized light of the same intensity, was used to test the hypothesis that the North Atlantic copepod, Calanus spp., is linearly polarotactic. In addition, the transparency of these copepods, as they might be seen by polarization insensitive vs. sensitive visual systems, was measured. Calanus spp. exhibited negative polarotaxis with a preference ratio of 1.9:1. Their transparency decreased from 80% to 20% to 30% in the unpolarized, partially polarized, and electric (e-) vector orientation domains respectively - that is, these copepods would appear opaque and conspicuous to a polarization-sensitive viewer looking at them under conditions rich in polarized light. Since the only difference between the two plankton traps was the polarization cue, we conclude that Calanus spp. are polarization sensitive and exhibit negative polarotaxis at low light intensities (albeit well within the sensitivity range reported for copepods). We hypothesize that Calanus spp. can use polarization vision to reduce their risk of predation by polarization-sensitive predators and suggest that this be tested in future experiments. |
format |
Text |
author |
Lerner, Amit Browman, Howard I. |
author_facet |
Lerner, Amit Browman, Howard I. |
author_sort |
Lerner, Amit |
title |
The copepod Calanus spp. (Calanidae) is repelled by polarized light |
title_short |
The copepod Calanus spp. (Calanidae) is repelled by polarized light |
title_full |
The copepod Calanus spp. (Calanidae) is repelled by polarized light |
title_fullStr |
The copepod Calanus spp. (Calanidae) is repelled by polarized light |
title_full_unstemmed |
The copepod Calanus spp. (Calanidae) is repelled by polarized light |
title_sort |
copepod calanus spp. (calanidae) is repelled by polarized light |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5071912/ http://www.ncbi.nlm.nih.gov/pubmed/27762400 https://doi.org/10.1038/srep35891 |
genre |
North Atlantic Copepods |
genre_facet |
North Atlantic Copepods |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5071912/ http://www.ncbi.nlm.nih.gov/pubmed/27762400 http://dx.doi.org/10.1038/srep35891 |
op_rights |
Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
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CC-BY |
op_doi |
https://doi.org/10.1038/srep35891 |
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Scientific Reports |
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