Lipid storage consumption and feeding ability of Calanus glacialis Jaschnov, 1955 males
Calanus is one of the best studied genera of Arctic zooplankton, but still we know very little about the males since they are short-lived and mainly present in winter. Their short life-span compared to females is assumed to be a combination of high mating activity, no feeding and consequential deple...
Published in: | Journal of Experimental Marine Biology and Ecology |
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Online Access: | https://hdl.handle.net/11250/2657877 https://doi.org/10.1016/j.jembe.2019.151226 |
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ftnorduniv:oai:nordopen.nord.no:11250/2657877 2023-05-15T15:18:54+02:00 Lipid storage consumption and feeding ability of Calanus glacialis Jaschnov, 1955 males Hatlebakk, Maja Karoline Viddal Graeve, Martin Boissonnot, Lauris Søreide, Janne 2019 application/pdf https://hdl.handle.net/11250/2657877 https://doi.org/10.1016/j.jembe.2019.151226 eng eng Elsevier Norwegian Research Council: 244319 Norwegian Research Council: 227438 Norwegian Research Council: 226417 Norwegian Research Council: 246747 Norwegian Research Council: 216537 Hatlebakk, M., Graeve, M., Boissonnot, L. & Søreide, J. E. (2019). Lipid storage consumption and feeding ability of Calanus glacialis Jaschnov, 1955 males. Journal of Experimental Marine Biology and Ecology, 521:151226. doi: urn:issn:1879-1697 https://hdl.handle.net/11250/2657877 https://doi.org/10.1016/j.jembe.2019.151226 cristin:1746062 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2019 The Author(s) CC-BY 10 521 Journal of Experimental Marine Biology and Ecology VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Peer reviewed Journal article 2019 ftnorduniv https://doi.org/10.1016/j.jembe.2019.151226 2021-07-13T18:13:13Z Calanus is one of the best studied genera of Arctic zooplankton, but still we know very little about the males since they are short-lived and mainly present in winter. Their short life-span compared to females is assumed to be a combination of high mating activity, no feeding and consequential depletion of lipid stores. In this study we tested 1) if the life span of male Calanus glacialis is limited by their lipid storage reserves and 2) if males are capable of feeding and utilize food if present. We ran two separate experiments from January to March; one on starvation and one on feeding. In the 39-days long starvation experiment we followed the lipid sac size of individually incubated males until their time of death. On average the total lipid (TL) content decreased by 2.6 to 4.5 μg day−1, but despite this males had substantial amounts of lipids left (131.4 μg, SD 44.0) when they died. This strongly suggests that the depletion of lipid reserves is not the main reason for males' short life span which in this study was measured to be up to 73 days. In the feeding experiment, we fed both C. glacialis males and females ad libitum with 13C labelled microalgae. Both males and females were capable of feeding and assimilate the diatom monoculture, but females responded faster to the sudden favourable food conditions, and produced more and larger fecal pellets than the males. Assimilation of 13C labelled 20:5(n-3), an essential polyunsaturated fatty acid (PUFA), from the diatom diet was traceable in both males and females on day 21, and then with a higher enrichment in females than males. Morphological investigations of the feeding appendages showed some differences between sexes, suggesting males to be more omnivorous than females. In conclusion, lipid storage depletion is not the cause of death for male C. glacialis, and males may even compensate for some of the mating energy costs by feeding. In future, we recommend further studies on the role of essential fatty acids (FA) for sperm formation and aging as determining factors for males' relatively short life span. publishedVersion Article in Journal/Newspaper Arctic Calanus glacialis Zooplankton Open archive Nord universitet Arctic Journal of Experimental Marine Biology and Ecology 521 151226 |
institution |
Open Polar |
collection |
Open archive Nord universitet |
op_collection_id |
ftnorduniv |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Hatlebakk, Maja Karoline Viddal Graeve, Martin Boissonnot, Lauris Søreide, Janne Lipid storage consumption and feeding ability of Calanus glacialis Jaschnov, 1955 males |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 |
description |
Calanus is one of the best studied genera of Arctic zooplankton, but still we know very little about the males since they are short-lived and mainly present in winter. Their short life-span compared to females is assumed to be a combination of high mating activity, no feeding and consequential depletion of lipid stores. In this study we tested 1) if the life span of male Calanus glacialis is limited by their lipid storage reserves and 2) if males are capable of feeding and utilize food if present. We ran two separate experiments from January to March; one on starvation and one on feeding. In the 39-days long starvation experiment we followed the lipid sac size of individually incubated males until their time of death. On average the total lipid (TL) content decreased by 2.6 to 4.5 μg day−1, but despite this males had substantial amounts of lipids left (131.4 μg, SD 44.0) when they died. This strongly suggests that the depletion of lipid reserves is not the main reason for males' short life span which in this study was measured to be up to 73 days. In the feeding experiment, we fed both C. glacialis males and females ad libitum with 13C labelled microalgae. Both males and females were capable of feeding and assimilate the diatom monoculture, but females responded faster to the sudden favourable food conditions, and produced more and larger fecal pellets than the males. Assimilation of 13C labelled 20:5(n-3), an essential polyunsaturated fatty acid (PUFA), from the diatom diet was traceable in both males and females on day 21, and then with a higher enrichment in females than males. Morphological investigations of the feeding appendages showed some differences between sexes, suggesting males to be more omnivorous than females. In conclusion, lipid storage depletion is not the cause of death for male C. glacialis, and males may even compensate for some of the mating energy costs by feeding. In future, we recommend further studies on the role of essential fatty acids (FA) for sperm formation and aging as determining factors for males' relatively short life span. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hatlebakk, Maja Karoline Viddal Graeve, Martin Boissonnot, Lauris Søreide, Janne |
author_facet |
Hatlebakk, Maja Karoline Viddal Graeve, Martin Boissonnot, Lauris Søreide, Janne |
author_sort |
Hatlebakk, Maja Karoline Viddal |
title |
Lipid storage consumption and feeding ability of Calanus glacialis Jaschnov, 1955 males |
title_short |
Lipid storage consumption and feeding ability of Calanus glacialis Jaschnov, 1955 males |
title_full |
Lipid storage consumption and feeding ability of Calanus glacialis Jaschnov, 1955 males |
title_fullStr |
Lipid storage consumption and feeding ability of Calanus glacialis Jaschnov, 1955 males |
title_full_unstemmed |
Lipid storage consumption and feeding ability of Calanus glacialis Jaschnov, 1955 males |
title_sort |
lipid storage consumption and feeding ability of calanus glacialis jaschnov, 1955 males |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://hdl.handle.net/11250/2657877 https://doi.org/10.1016/j.jembe.2019.151226 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Calanus glacialis Zooplankton |
genre_facet |
Arctic Calanus glacialis Zooplankton |
op_source |
10 521 Journal of Experimental Marine Biology and Ecology |
op_relation |
Norwegian Research Council: 244319 Norwegian Research Council: 227438 Norwegian Research Council: 226417 Norwegian Research Council: 246747 Norwegian Research Council: 216537 Hatlebakk, M., Graeve, M., Boissonnot, L. & Søreide, J. E. (2019). Lipid storage consumption and feeding ability of Calanus glacialis Jaschnov, 1955 males. Journal of Experimental Marine Biology and Ecology, 521:151226. doi: urn:issn:1879-1697 https://hdl.handle.net/11250/2657877 https://doi.org/10.1016/j.jembe.2019.151226 cristin:1746062 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2019 The Author(s) |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.jembe.2019.151226 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
521 |
container_start_page |
151226 |
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1766349062347423744 |