Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord
The trophic position of Calanus finmarchicus in the Trondheim Fjord in 2004 was determined through stable isotope analyses. Wild specimens were sampled monthly in the fjord and δ13C and δ15N signatures of the developmental stages from CIII to adults were measured. There were statistically significan...
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ftoceanrep:oai:oceanrep.geomar.de:6853 2023-05-15T15:47:53+02:00 Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord Saage, Andrea Altin, D. Vadstein, O. Sommer, Ulrich 2008 text https://oceanrep.geomar.de/id/eprint/6853/ https://oceanrep.geomar.de/id/eprint/6853/1/1-s2.0-S1385110107001141-main.pdf https://doi.org/10.1016/j.seares.2007.12.003 en eng Elsevier https://oceanrep.geomar.de/id/eprint/6853/1/1-s2.0-S1385110107001141-main.pdf Saage, A., Altin, D., Vadstein, O. and Sommer, U. (2008) Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord. Journal of Sea Research, 59 . pp. 162-172. DOI 10.1016/j.seares.2007.12.003 <https://doi.org/10.1016/j.seares.2007.12.003>. doi:10.1016/j.seares.2007.12.003 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2008 ftoceanrep https://doi.org/10.1016/j.seares.2007.12.003 2023-04-07T14:53:46Z The trophic position of Calanus finmarchicus in the Trondheim Fjord in 2004 was determined through stable isotope analyses. Wild specimens were sampled monthly in the fjord and δ13C and δ15N signatures of the developmental stages from CIII to adults were measured. There were statistically significant differences in the δ13C and δ15N signatures of three identified groups: overwintered parental generation, developing new generation and new generation preparing for overwintering. C. finmarchicus individuals raised in a laboratory on a pure algal diet (Dunaliella tertiolecta and Isochrysis galbana) provided stable isotope signatures for purely herbivorous copepods. With these signatures as comparison, the trophic position of C. finmarchicus in the Trondheim Fjord in 2004 was determined as trophic level 2.4, thus indicating omnivory under natural conditions. Additionally, our data suggest that seasonal differences in the δ13C signatures of C. finmarchicus are due to the varying lipid content of the different developmental stages. Article in Journal/Newspaper Calanus finmarchicus Copepods OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Journal of Sea Research 59 3 162 172 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
The trophic position of Calanus finmarchicus in the Trondheim Fjord in 2004 was determined through stable isotope analyses. Wild specimens were sampled monthly in the fjord and δ13C and δ15N signatures of the developmental stages from CIII to adults were measured. There were statistically significant differences in the δ13C and δ15N signatures of three identified groups: overwintered parental generation, developing new generation and new generation preparing for overwintering. C. finmarchicus individuals raised in a laboratory on a pure algal diet (Dunaliella tertiolecta and Isochrysis galbana) provided stable isotope signatures for purely herbivorous copepods. With these signatures as comparison, the trophic position of C. finmarchicus in the Trondheim Fjord in 2004 was determined as trophic level 2.4, thus indicating omnivory under natural conditions. Additionally, our data suggest that seasonal differences in the δ13C signatures of C. finmarchicus are due to the varying lipid content of the different developmental stages. |
format |
Article in Journal/Newspaper |
author |
Saage, Andrea Altin, D. Vadstein, O. Sommer, Ulrich |
spellingShingle |
Saage, Andrea Altin, D. Vadstein, O. Sommer, Ulrich Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord |
author_facet |
Saage, Andrea Altin, D. Vadstein, O. Sommer, Ulrich |
author_sort |
Saage, Andrea |
title |
Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord |
title_short |
Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord |
title_full |
Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord |
title_fullStr |
Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord |
title_full_unstemmed |
Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord |
title_sort |
trophic position of calanus finmarchicus (copepoda, calanoida) in the trondheim fjord |
publisher |
Elsevier |
publishDate |
2008 |
url |
https://oceanrep.geomar.de/id/eprint/6853/ https://oceanrep.geomar.de/id/eprint/6853/1/1-s2.0-S1385110107001141-main.pdf https://doi.org/10.1016/j.seares.2007.12.003 |
genre |
Calanus finmarchicus Copepods |
genre_facet |
Calanus finmarchicus Copepods |
op_relation |
https://oceanrep.geomar.de/id/eprint/6853/1/1-s2.0-S1385110107001141-main.pdf Saage, A., Altin, D., Vadstein, O. and Sommer, U. (2008) Trophic position of Calanus finmarchicus (Copepoda, Calanoida) in the Trondheim Fjord. Journal of Sea Research, 59 . pp. 162-172. DOI 10.1016/j.seares.2007.12.003 <https://doi.org/10.1016/j.seares.2007.12.003>. doi:10.1016/j.seares.2007.12.003 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.seares.2007.12.003 |
container_title |
Journal of Sea Research |
container_volume |
59 |
container_issue |
3 |
container_start_page |
162 |
op_container_end_page |
172 |
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1766382843164884992 |