Feeding in dominant Antarctic copepods - does the morphology of the mandibular gnathobases relate to diet?
This study should clarify the importance of morphology and stability of the mandibular gnathobases for the diet of Antarctic copepod species. The gnathobase morphology of the dominant copepod species Calanoides acutus, Calanus propinquus, Ctenocalanus citer, Rhincalanus gigas, Metridia gerlachei, St...
Published in: | Marine Biology |
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Language: | English |
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2005
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Online Access: | https://oceanrep.geomar.de/id/eprint/27073/ https://oceanrep.geomar.de/id/eprint/27073/1/Michels%20%26%20Schnack-Schiel%202005%20MarBiol.pdf https://doi.org/10.1007/s00227-004-1452-1 |
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ftoceanrep:oai:oceanrep.geomar.de:27073 2023-05-15T14:00:07+02:00 Feeding in dominant Antarctic copepods - does the morphology of the mandibular gnathobases relate to diet? Michels, Jan Schnack-Schiel, S. B. 2005 text https://oceanrep.geomar.de/id/eprint/27073/ https://oceanrep.geomar.de/id/eprint/27073/1/Michels%20%26%20Schnack-Schiel%202005%20MarBiol.pdf https://doi.org/10.1007/s00227-004-1452-1 en eng Springer https://oceanrep.geomar.de/id/eprint/27073/1/Michels%20%26%20Schnack-Schiel%202005%20MarBiol.pdf Michels, J. and Schnack-Schiel, S. B. (2005) Feeding in dominant Antarctic copepods - does the morphology of the mandibular gnathobases relate to diet?. Marine Biology, 146 (3). pp. 483-495. DOI 10.1007/s00227-004-1452-1 <https://doi.org/10.1007/s00227-004-1452-1>. doi:10.1007/s00227-004-1452-1 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2005 ftoceanrep https://doi.org/10.1007/s00227-004-1452-1 2023-04-07T15:17:03Z This study should clarify the importance of morphology and stability of the mandibular gnathobases for the diet of Antarctic copepod species. The gnathobase morphology of the dominant copepod species Calanoides acutus, Calanus propinquus, Ctenocalanus citer, Rhincalanus gigas, Metridia gerlachei, Stephos longipes, Microcalanus pygmaeus and Paraeuchaeta antarctica from the Southern Ocean was investigated in detail by means of a scanning electron microscope. The mandibular gnathobases of C. acutus, C. propinquus and C. citer have relatively short and compact teeth. These species feed mainly on diatoms and are able to crack the silicious diatom frustules with their mandibular gnathobases by directed pressure. In contrast the teeth of the mandibular gnathobases of P. antarctica are very long and pointed. The nutrition of this species consists predominantly of other smaller copepod species. The motile prey can be held by skewering, using the gnathobases, and then eventually minced. The mandibular gnathobases of P. antarctica have notably more small bristles than those of the other investigated copepod species. These bristles are probably associated with receptors and could serve to locate the prey. The morphology of the gnathobases of R. gigas and M. gerlachei is between that of P. antarctica on the one side and that of C. acutus, C. propinquus and C. citer on the other. Based on the morphology of its gnathobases the copepod species S. longipes, which has to date been found to feed primarily on phytoplankton, mainly ice algae, must also be considered a zooplankton feeder. The investigation showed that M. pygmaeus has gnathobases with surprisingly long and pointed teeth, indicating that this species very probably feeds both on phyto- and on zooplankton organisms. While the mandibular gnathobases of the males of C. propinquus, R. gigas, M. gerlachei and S. longipes have the same morphology as the females of the respective species, in the other four investigated copepod species the males have reduced (C. acutus, C. ... Article in Journal/Newspaper Antarc* Antarctic Antarctica ice algae Southern Ocean Copepods OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Southern Ocean Marine Biology 146 3 483 495 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
This study should clarify the importance of morphology and stability of the mandibular gnathobases for the diet of Antarctic copepod species. The gnathobase morphology of the dominant copepod species Calanoides acutus, Calanus propinquus, Ctenocalanus citer, Rhincalanus gigas, Metridia gerlachei, Stephos longipes, Microcalanus pygmaeus and Paraeuchaeta antarctica from the Southern Ocean was investigated in detail by means of a scanning electron microscope. The mandibular gnathobases of C. acutus, C. propinquus and C. citer have relatively short and compact teeth. These species feed mainly on diatoms and are able to crack the silicious diatom frustules with their mandibular gnathobases by directed pressure. In contrast the teeth of the mandibular gnathobases of P. antarctica are very long and pointed. The nutrition of this species consists predominantly of other smaller copepod species. The motile prey can be held by skewering, using the gnathobases, and then eventually minced. The mandibular gnathobases of P. antarctica have notably more small bristles than those of the other investigated copepod species. These bristles are probably associated with receptors and could serve to locate the prey. The morphology of the gnathobases of R. gigas and M. gerlachei is between that of P. antarctica on the one side and that of C. acutus, C. propinquus and C. citer on the other. Based on the morphology of its gnathobases the copepod species S. longipes, which has to date been found to feed primarily on phytoplankton, mainly ice algae, must also be considered a zooplankton feeder. The investigation showed that M. pygmaeus has gnathobases with surprisingly long and pointed teeth, indicating that this species very probably feeds both on phyto- and on zooplankton organisms. While the mandibular gnathobases of the males of C. propinquus, R. gigas, M. gerlachei and S. longipes have the same morphology as the females of the respective species, in the other four investigated copepod species the males have reduced (C. acutus, C. ... |
format |
Article in Journal/Newspaper |
author |
Michels, Jan Schnack-Schiel, S. B. |
spellingShingle |
Michels, Jan Schnack-Schiel, S. B. Feeding in dominant Antarctic copepods - does the morphology of the mandibular gnathobases relate to diet? |
author_facet |
Michels, Jan Schnack-Schiel, S. B. |
author_sort |
Michels, Jan |
title |
Feeding in dominant Antarctic copepods - does the morphology of the mandibular gnathobases relate to diet? |
title_short |
Feeding in dominant Antarctic copepods - does the morphology of the mandibular gnathobases relate to diet? |
title_full |
Feeding in dominant Antarctic copepods - does the morphology of the mandibular gnathobases relate to diet? |
title_fullStr |
Feeding in dominant Antarctic copepods - does the morphology of the mandibular gnathobases relate to diet? |
title_full_unstemmed |
Feeding in dominant Antarctic copepods - does the morphology of the mandibular gnathobases relate to diet? |
title_sort |
feeding in dominant antarctic copepods - does the morphology of the mandibular gnathobases relate to diet? |
publisher |
Springer |
publishDate |
2005 |
url |
https://oceanrep.geomar.de/id/eprint/27073/ https://oceanrep.geomar.de/id/eprint/27073/1/Michels%20%26%20Schnack-Schiel%202005%20MarBiol.pdf https://doi.org/10.1007/s00227-004-1452-1 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica ice algae Southern Ocean Copepods |
genre_facet |
Antarc* Antarctic Antarctica ice algae Southern Ocean Copepods |
op_relation |
https://oceanrep.geomar.de/id/eprint/27073/1/Michels%20%26%20Schnack-Schiel%202005%20MarBiol.pdf Michels, J. and Schnack-Schiel, S. B. (2005) Feeding in dominant Antarctic copepods - does the morphology of the mandibular gnathobases relate to diet?. Marine Biology, 146 (3). pp. 483-495. DOI 10.1007/s00227-004-1452-1 <https://doi.org/10.1007/s00227-004-1452-1>. doi:10.1007/s00227-004-1452-1 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00227-004-1452-1 |
container_title |
Marine Biology |
container_volume |
146 |
container_issue |
3 |
container_start_page |
483 |
op_container_end_page |
495 |
_version_ |
1766269119622021120 |