Chlorophyll a conversion and gut passage time for the pelagic
Abstract. We determined the chlorophyll (Chi) a conversion efficiency, defined as the conversion of Chi a into pheopigments and non-fluorescent products, for the cold-water appendicularian Oikopleura vanhoeffeni using M Ge as conservative tracer. In both laboratory experiments and in freshly collect...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.319.6654 2023-05-15T17:22:16+02:00 Chlorophyll a conversion and gut passage time for the pelagic Er B. Bochdansky Don Deibel Elizabeth A. Hatfield The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.319.6654 http://plankt.oxfordjournals.org/content/20/11/2179.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.319.6654 http://plankt.oxfordjournals.org/content/20/11/2179.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://plankt.oxfordjournals.org/content/20/11/2179.full.pdf text ftciteseerx 2016-09-04T00:14:53Z Abstract. We determined the chlorophyll (Chi) a conversion efficiency, defined as the conversion of Chi a into pheopigments and non-fluorescent products, for the cold-water appendicularian Oikopleura vanhoeffeni using M Ge as conservative tracer. In both laboratory experiments and in freshly collected animals, there was enough undegraded Chi a present in the gut to provide an index of feeding activity for individual animals. In laboratory experiments with diatoms, Chi a conversion efficiency was predictable with an average of 79%. The mean gut passage time (0.8 h) determined using corn starch and diatoms as markers was not influenced by food concentration or animal size over a trunk length range of 1.8-5 mm. When experimentally determined Chi a conversion efficiency and gut passage times were applied to O.vanhoeffeni from Logy Bay (Newfoundland), the estimated clearance rates were in close agreement with previously published values using several different techniques. We therefore suggest that the modified gut pigment technique is a useful tool to assess in situ ingestion rates of O.vanhoeffeni. Text Newfoundland Unknown |
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Open Polar |
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ftciteseerx |
language |
English |
description |
Abstract. We determined the chlorophyll (Chi) a conversion efficiency, defined as the conversion of Chi a into pheopigments and non-fluorescent products, for the cold-water appendicularian Oikopleura vanhoeffeni using M Ge as conservative tracer. In both laboratory experiments and in freshly collected animals, there was enough undegraded Chi a present in the gut to provide an index of feeding activity for individual animals. In laboratory experiments with diatoms, Chi a conversion efficiency was predictable with an average of 79%. The mean gut passage time (0.8 h) determined using corn starch and diatoms as markers was not influenced by food concentration or animal size over a trunk length range of 1.8-5 mm. When experimentally determined Chi a conversion efficiency and gut passage times were applied to O.vanhoeffeni from Logy Bay (Newfoundland), the estimated clearance rates were in close agreement with previously published values using several different techniques. We therefore suggest that the modified gut pigment technique is a useful tool to assess in situ ingestion rates of O.vanhoeffeni. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Er B. Bochdansky Don Deibel Elizabeth A. Hatfield |
spellingShingle |
Er B. Bochdansky Don Deibel Elizabeth A. Hatfield Chlorophyll a conversion and gut passage time for the pelagic |
author_facet |
Er B. Bochdansky Don Deibel Elizabeth A. Hatfield |
author_sort |
Er B. Bochdansky |
title |
Chlorophyll a conversion and gut passage time for the pelagic |
title_short |
Chlorophyll a conversion and gut passage time for the pelagic |
title_full |
Chlorophyll a conversion and gut passage time for the pelagic |
title_fullStr |
Chlorophyll a conversion and gut passage time for the pelagic |
title_full_unstemmed |
Chlorophyll a conversion and gut passage time for the pelagic |
title_sort |
chlorophyll a conversion and gut passage time for the pelagic |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.319.6654 http://plankt.oxfordjournals.org/content/20/11/2179.full.pdf |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
http://plankt.oxfordjournals.org/content/20/11/2179.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.319.6654 http://plankt.oxfordjournals.org/content/20/11/2179.full.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766108783870738432 |