Antarctic krill (Euphausia superba) acquire a UV-absorbing mycosporine-like amino acid from dietary algae
We hypothesised that Antarctic krill acquire UV-absorbing mycosporine-like amino acids (MAAs) from dietary algae, which produce MAAs in response to ultraviolet (UV) irradiation. To test this hypothesis, we grew cultures of Phaeocystis antarctica that had been grown under either photosynthetically ac...
Published in: | Journal of Experimental Marine Biology and Ecology |
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Online Access: | https://doi.org/10.1016/S0022-0981(00)00293-8 http://ecite.utas.edu.au/19163 |
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ftunivtasecite:oai:ecite.utas.edu.au:19163 2023-05-15T13:59:07+02:00 Antarctic krill (Euphausia superba) acquire a UV-absorbing mycosporine-like amino acid from dietary algae Newman, SJ Dunlap, WC Nicol, S Ritz, DA 2000 https://doi.org/10.1016/S0022-0981(00)00293-8 http://ecite.utas.edu.au/19163 en eng Elsevier-Science-BV http://dx.doi.org/10.1016/S0022-0981(00)00293-8 Newman, SJ and Dunlap, WC and Nicol, S and Ritz, DA, Antarctic krill (Euphausia superba) acquire a UV-absorbing mycosporine-like amino acid from dietary algae, Journal of Experimental Marine Biology and Ecology, 255, (1) pp. 93-110. ISSN 0022-0981 (2000) [Refereed Article] http://ecite.utas.edu.au/19163 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 2000 ftunivtasecite https://doi.org/10.1016/S0022-0981(00)00293-8 2019-12-13T21:01:54Z We hypothesised that Antarctic krill acquire UV-absorbing mycosporine-like amino acids (MAAs) from dietary algae, which produce MAAs in response to ultraviolet (UV) irradiation. To test this hypothesis, we grew cultures of Phaeocystis antarctica that had been grown under either photosynthetically active radiation (PAR, 400-750 nm) plus UV irradiation (UVR, 280-400 nm), or else PAR-only. Algae grown under PAR-only produced high concentrations of porphyra-334, whereas additional UVR caused formation of high concentrations of mycosporine-glycine:valine and lower concentrations of porphyra-334. Krill were fed with either of these two cultures on eight occasions over 63 days. A third group was starved for the duration of the experiment. Animals were analysed after 36 and 63 days for MAA content. Remaining animals from all treatments were starved for a further 35 days and analysed to examine MAA retention characteristics. Our findings are that krill acquired different MAAs from dietary algae depending on the light conditions under which the algae were grown. Specifically, krill fed algae grown under PAR-only had higher concentrations of porphyra-334 than starved krill. Conversely, krill fed algae grown under PAR with additional UVR had high body concentrations of mycosporine-glycine:valine. MAA concentrations in starved krill remained static throughout the experiment. However, long term starvation (35 days) caused levels of certain acquired MAAs to decline. From this we can infer that MAA concentrations in krill are dependent on the MAA content of phytoplankton, and therefore the algae's response to UV exposure. This has implications for transfer of MAAs through marine trophic webs. (C) 2000 Elsevier Science B.V. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba eCite UTAS (University of Tasmania) Antarctic Journal of Experimental Marine Biology and Ecology 255 1 93 110 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Newman, SJ Dunlap, WC Nicol, S Ritz, DA Antarctic krill (Euphausia superba) acquire a UV-absorbing mycosporine-like amino acid from dietary algae |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
We hypothesised that Antarctic krill acquire UV-absorbing mycosporine-like amino acids (MAAs) from dietary algae, which produce MAAs in response to ultraviolet (UV) irradiation. To test this hypothesis, we grew cultures of Phaeocystis antarctica that had been grown under either photosynthetically active radiation (PAR, 400-750 nm) plus UV irradiation (UVR, 280-400 nm), or else PAR-only. Algae grown under PAR-only produced high concentrations of porphyra-334, whereas additional UVR caused formation of high concentrations of mycosporine-glycine:valine and lower concentrations of porphyra-334. Krill were fed with either of these two cultures on eight occasions over 63 days. A third group was starved for the duration of the experiment. Animals were analysed after 36 and 63 days for MAA content. Remaining animals from all treatments were starved for a further 35 days and analysed to examine MAA retention characteristics. Our findings are that krill acquired different MAAs from dietary algae depending on the light conditions under which the algae were grown. Specifically, krill fed algae grown under PAR-only had higher concentrations of porphyra-334 than starved krill. Conversely, krill fed algae grown under PAR with additional UVR had high body concentrations of mycosporine-glycine:valine. MAA concentrations in starved krill remained static throughout the experiment. However, long term starvation (35 days) caused levels of certain acquired MAAs to decline. From this we can infer that MAA concentrations in krill are dependent on the MAA content of phytoplankton, and therefore the algae's response to UV exposure. This has implications for transfer of MAAs through marine trophic webs. (C) 2000 Elsevier Science B.V. |
format |
Article in Journal/Newspaper |
author |
Newman, SJ Dunlap, WC Nicol, S Ritz, DA |
author_facet |
Newman, SJ Dunlap, WC Nicol, S Ritz, DA |
author_sort |
Newman, SJ |
title |
Antarctic krill (Euphausia superba) acquire a UV-absorbing mycosporine-like amino acid from dietary algae |
title_short |
Antarctic krill (Euphausia superba) acquire a UV-absorbing mycosporine-like amino acid from dietary algae |
title_full |
Antarctic krill (Euphausia superba) acquire a UV-absorbing mycosporine-like amino acid from dietary algae |
title_fullStr |
Antarctic krill (Euphausia superba) acquire a UV-absorbing mycosporine-like amino acid from dietary algae |
title_full_unstemmed |
Antarctic krill (Euphausia superba) acquire a UV-absorbing mycosporine-like amino acid from dietary algae |
title_sort |
antarctic krill (euphausia superba) acquire a uv-absorbing mycosporine-like amino acid from dietary algae |
publisher |
Elsevier-Science-BV |
publishDate |
2000 |
url |
https://doi.org/10.1016/S0022-0981(00)00293-8 http://ecite.utas.edu.au/19163 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba |
op_relation |
http://dx.doi.org/10.1016/S0022-0981(00)00293-8 Newman, SJ and Dunlap, WC and Nicol, S and Ritz, DA, Antarctic krill (Euphausia superba) acquire a UV-absorbing mycosporine-like amino acid from dietary algae, Journal of Experimental Marine Biology and Ecology, 255, (1) pp. 93-110. ISSN 0022-0981 (2000) [Refereed Article] http://ecite.utas.edu.au/19163 |
op_doi |
https://doi.org/10.1016/S0022-0981(00)00293-8 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
255 |
container_issue |
1 |
container_start_page |
93 |
op_container_end_page |
110 |
_version_ |
1766267504776183808 |