In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland)
We report in situ ingestion rates of individual oikopleurid appendicularians from the Northeast water Polynya (NEW) determined by a modification of the gut pigment technique. Appendicularians were most abundant at ice edge stations and were rare at open water stations in the centre of the polynya. G...
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ftmemorialuniv:oai:research.library.mun.ca:547 2024-09-15T18:09:55+00:00 In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland) Acuna, Jose Luis Deibel, D. Bochdansky, Alexander Boris Hatfield, E. 1999-09-17 application/pdf https://research.library.mun.ca/547/ https://research.library.mun.ca/547/1/in_situ_ingestion.pdf https://research.library.mun.ca/547/3/in_situ_ingestion.pdf http://www.int-res.com/abstracts/meps/v186/p149-160/ en eng Inter-Research https://research.library.mun.ca/547/1/in_situ_ingestion.pdf https://research.library.mun.ca/547/3/in_situ_ingestion.pdf Acuna, Jose Luis <https://research.library.mun.ca/view/creator_az/Acuna=3AJose_Luis=3A=3A.html> and Deibel, D. <https://research.library.mun.ca/view/creator_az/Deibel=3AD=2E_=3A=3A.html> and Bochdansky, Alexander Boris <https://research.library.mun.ca/view/creator_az/Bochdansky=3AAlexander_Boris=3A=3A.html> and Hatfield, E. <https://research.library.mun.ca/view/creator_az/Hatfield=3AE=2E=3A=3A.html> (1999) In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland). Marine Ecology Progress Series, 186. pp. 149-160. ISSN 1616-1599 cc_by_nc QH301 Biology Article PeerReviewed 1999 ftmemorialuniv 2024-07-10T03:16:00Z We report in situ ingestion rates of individual oikopleurid appendicularians from the Northeast water Polynya (NEW) determined by a modification of the gut pigment technique. Appendicularians were most abundant at ice edge stations and were rare at open water stations in the centre of the polynya. Gut passage time (GPT), which was determined in experiments onboard ship, was not related to body size (mean ± SD = 74 ± 23 min). Gut chlorophyll content (GCC) excluding phaeopigments (i.e. GCC = chlorophyll a + b + c), averaged 4.06 ng ind.-1, with quartiles of 1.20 to 4.73 ng ind.-1. There was no evidence of a diel feeding rhythm. GCC was higher and more variable at non-bloom (i.e. at chlorophyll concentrations <0.8 mg m-3) than at bloom stations, and was inversely related to the relative proportion of chlorophyll in particles >5 μm in size. This suggests inhibition of ingestion rates at ice edge stations with diatom blooms. The ingestion rate (IR, ng chlorophyll ind.-1 d-1) of individual appendicularians in the NEW can be predicted by IR = 2.5 BL:BT-0.41 TL2.14 (r2 = 0.43) where BL:BT is the ratio of chlorophyll a in particles >5 μm in diameter to the total chlorophyll biomass, and TL (mm) is the trunk length. Article in Journal/Newspaper Greenland Memorial University of Newfoundland: Research Repository |
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Open Polar |
collection |
Memorial University of Newfoundland: Research Repository |
op_collection_id |
ftmemorialuniv |
language |
English |
topic |
QH301 Biology |
spellingShingle |
QH301 Biology Acuna, Jose Luis Deibel, D. Bochdansky, Alexander Boris Hatfield, E. In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland) |
topic_facet |
QH301 Biology |
description |
We report in situ ingestion rates of individual oikopleurid appendicularians from the Northeast water Polynya (NEW) determined by a modification of the gut pigment technique. Appendicularians were most abundant at ice edge stations and were rare at open water stations in the centre of the polynya. Gut passage time (GPT), which was determined in experiments onboard ship, was not related to body size (mean ± SD = 74 ± 23 min). Gut chlorophyll content (GCC) excluding phaeopigments (i.e. GCC = chlorophyll a + b + c), averaged 4.06 ng ind.-1, with quartiles of 1.20 to 4.73 ng ind.-1. There was no evidence of a diel feeding rhythm. GCC was higher and more variable at non-bloom (i.e. at chlorophyll concentrations <0.8 mg m-3) than at bloom stations, and was inversely related to the relative proportion of chlorophyll in particles >5 μm in size. This suggests inhibition of ingestion rates at ice edge stations with diatom blooms. The ingestion rate (IR, ng chlorophyll ind.-1 d-1) of individual appendicularians in the NEW can be predicted by IR = 2.5 BL:BT-0.41 TL2.14 (r2 = 0.43) where BL:BT is the ratio of chlorophyll a in particles >5 μm in diameter to the total chlorophyll biomass, and TL (mm) is the trunk length. |
format |
Article in Journal/Newspaper |
author |
Acuna, Jose Luis Deibel, D. Bochdansky, Alexander Boris Hatfield, E. |
author_facet |
Acuna, Jose Luis Deibel, D. Bochdansky, Alexander Boris Hatfield, E. |
author_sort |
Acuna, Jose Luis |
title |
In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland) |
title_short |
In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland) |
title_full |
In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland) |
title_fullStr |
In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland) |
title_full_unstemmed |
In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland) |
title_sort |
in situ ingestion rates of appendicularian tunicates in the northeast water polynya (ne greenland) |
publisher |
Inter-Research |
publishDate |
1999 |
url |
https://research.library.mun.ca/547/ https://research.library.mun.ca/547/1/in_situ_ingestion.pdf https://research.library.mun.ca/547/3/in_situ_ingestion.pdf http://www.int-res.com/abstracts/meps/v186/p149-160/ |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
https://research.library.mun.ca/547/1/in_situ_ingestion.pdf https://research.library.mun.ca/547/3/in_situ_ingestion.pdf Acuna, Jose Luis <https://research.library.mun.ca/view/creator_az/Acuna=3AJose_Luis=3A=3A.html> and Deibel, D. <https://research.library.mun.ca/view/creator_az/Deibel=3AD=2E_=3A=3A.html> and Bochdansky, Alexander Boris <https://research.library.mun.ca/view/creator_az/Bochdansky=3AAlexander_Boris=3A=3A.html> and Hatfield, E. <https://research.library.mun.ca/view/creator_az/Hatfield=3AE=2E=3A=3A.html> (1999) In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland). Marine Ecology Progress Series, 186. pp. 149-160. ISSN 1616-1599 |
op_rights |
cc_by_nc |
_version_ |
1810447516434432000 |