Maline Daase: How much for the night? - Energetic costs of overwintering for the Arctic copepod Calanus glacialis
The copepod Calanus glacialis comprises up to 80% of the zooplankton biomass in Arctic shelf seas and plays a key role in Arctic marine ecosystems. It is primarily a grazer, accumulating essential polyunsaturated fatty acids from its algal diet as well as converting low-energy carbohydrates and prot...
Main Authors: | , , , , , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2014
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/37307/ http://www.mare-incognitum.no/files/downloads_mnight/Arctic_Change_Ottawa_2014_MalinDaase.pdf https://hdl.handle.net/10013/epic.44996 |
id |
ftawi:oai:epic.awi.de:37307 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:37307 2024-09-15T17:50:19+00:00 Maline Daase: How much for the night? - Energetic costs of overwintering for the Arctic copepod Calanus glacialis Soreide, Janne Daase, Malin Freese, Daniela Niehoff, Barbara Boissonnot, Lauris Hatlebakk, Maja Graeve, Martin 2014-12-08 https://epic.awi.de/id/eprint/37307/ http://www.mare-incognitum.no/files/downloads_mnight/Arctic_Change_Ottawa_2014_MalinDaase.pdf https://hdl.handle.net/10013/epic.44996 unknown Soreide, J. , Daase, M. , Freese, D. , Niehoff, B. , Boissonnot, L. , Hatlebakk, M. and Graeve, M. orcid:0000-0002-2294-1915 (2014) Maline Daase: How much for the night? - Energetic costs of overwintering for the Arctic copepod Calanus glacialis , Arctic Change 2014, Ottawa, Canada, 8 December 2014 - 12 December 2014 . hdl:10013/epic.44996 EPIC3Arctic Change 2014, Ottawa, Canada, 2014-12-08-2014-12-12Arcticchange 2014 Conference notRev 2014 ftawi 2024-06-24T04:11:05Z The copepod Calanus glacialis comprises up to 80% of the zooplankton biomass in Arctic shelf seas and plays a key role in Arctic marine ecosystems. It is primarily a grazer, accumulating essential polyunsaturated fatty acids from its algal diet as well as converting low-energy carbohydrates and proteins in algae into high-energy wax ester lipids. It is able to survive long periods without food by descending to depth and lowering its metabolism to a minimum, a state referred to as diapause. Although C. glacialis may be in this physiological state for up to 8 months each year we know very little about the energetic costs required during diapause. We therefore initiated an extensive field campaign in a high-Arctic fjord, sampling the local population monthly from June 2012 to July 2013. Monthly carbon demand was estimated by measuring respiration, image analysis was used to analyse variability in lipid content over the season. The carbon demand during winter differed among C. glacialis CIV, CV, females and males, with CV and adults being active much earlier previously assumed. Lipid reserves in CV and females remain largely untouched throughout autumn but decrease from January on, most likely to fuel moulting and maturation. The C. glacialis population declined steeply from January to May suggesting that individuals may run out of energy stores during winter. Of the verwintering stages, only IV seems to stay in diapause over an extended period, utilizing little of its lipid storage from fall through winter Conference Object Arctic Arctic copepod Calanus glacialis Zooplankton Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The copepod Calanus glacialis comprises up to 80% of the zooplankton biomass in Arctic shelf seas and plays a key role in Arctic marine ecosystems. It is primarily a grazer, accumulating essential polyunsaturated fatty acids from its algal diet as well as converting low-energy carbohydrates and proteins in algae into high-energy wax ester lipids. It is able to survive long periods without food by descending to depth and lowering its metabolism to a minimum, a state referred to as diapause. Although C. glacialis may be in this physiological state for up to 8 months each year we know very little about the energetic costs required during diapause. We therefore initiated an extensive field campaign in a high-Arctic fjord, sampling the local population monthly from June 2012 to July 2013. Monthly carbon demand was estimated by measuring respiration, image analysis was used to analyse variability in lipid content over the season. The carbon demand during winter differed among C. glacialis CIV, CV, females and males, with CV and adults being active much earlier previously assumed. Lipid reserves in CV and females remain largely untouched throughout autumn but decrease from January on, most likely to fuel moulting and maturation. The C. glacialis population declined steeply from January to May suggesting that individuals may run out of energy stores during winter. Of the verwintering stages, only IV seems to stay in diapause over an extended period, utilizing little of its lipid storage from fall through winter |
format |
Conference Object |
author |
Soreide, Janne Daase, Malin Freese, Daniela Niehoff, Barbara Boissonnot, Lauris Hatlebakk, Maja Graeve, Martin |
spellingShingle |
Soreide, Janne Daase, Malin Freese, Daniela Niehoff, Barbara Boissonnot, Lauris Hatlebakk, Maja Graeve, Martin Maline Daase: How much for the night? - Energetic costs of overwintering for the Arctic copepod Calanus glacialis |
author_facet |
Soreide, Janne Daase, Malin Freese, Daniela Niehoff, Barbara Boissonnot, Lauris Hatlebakk, Maja Graeve, Martin |
author_sort |
Soreide, Janne |
title |
Maline Daase: How much for the night? - Energetic costs of overwintering for the Arctic copepod Calanus glacialis |
title_short |
Maline Daase: How much for the night? - Energetic costs of overwintering for the Arctic copepod Calanus glacialis |
title_full |
Maline Daase: How much for the night? - Energetic costs of overwintering for the Arctic copepod Calanus glacialis |
title_fullStr |
Maline Daase: How much for the night? - Energetic costs of overwintering for the Arctic copepod Calanus glacialis |
title_full_unstemmed |
Maline Daase: How much for the night? - Energetic costs of overwintering for the Arctic copepod Calanus glacialis |
title_sort |
maline daase: how much for the night? - energetic costs of overwintering for the arctic copepod calanus glacialis |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/37307/ http://www.mare-incognitum.no/files/downloads_mnight/Arctic_Change_Ottawa_2014_MalinDaase.pdf https://hdl.handle.net/10013/epic.44996 |
genre |
Arctic Arctic copepod Calanus glacialis Zooplankton |
genre_facet |
Arctic Arctic copepod Calanus glacialis Zooplankton |
op_source |
EPIC3Arctic Change 2014, Ottawa, Canada, 2014-12-08-2014-12-12Arcticchange 2014 |
op_relation |
Soreide, J. , Daase, M. , Freese, D. , Niehoff, B. , Boissonnot, L. , Hatlebakk, M. and Graeve, M. orcid:0000-0002-2294-1915 (2014) Maline Daase: How much for the night? - Energetic costs of overwintering for the Arctic copepod Calanus glacialis , Arctic Change 2014, Ottawa, Canada, 8 December 2014 - 12 December 2014 . hdl:10013/epic.44996 |
_version_ |
1810292149455945728 |