DEGRADATION OF GUT PIGMENT DURING FEEDING BY A SUB-ANTARCTIC COPEPOD - IMPORTANCE OF FEEDING HISTORY AND DIGESTIVE ACCLIMATION
International audience Gut pigment degradation by females of the subantarctic copepod Drepanopus pectinatus was established by measurements of gut fluorescence prior to fecal pellet production. The total amount of pigment lost varied from 0 to 17% while the Chl a unrecovered as pheopigment ranged fr...
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ftsorbonneuniv:oai:HAL:hal-03476517v1 2024-09-15T17:47:48+00:00 DEGRADATION OF GUT PIGMENT DURING FEEDING BY A SUB-ANTARCTIC COPEPOD - IMPORTANCE OF FEEDING HISTORY AND DIGESTIVE ACCLIMATION Mayzaud, P Razouls, S Station Zoologique de Villefranche Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 1992 https://hal.science/hal-03476517 https://doi.org/10.4319/lo.1992.37.2.0393 en eng HAL CCSD Association for the Sciences of Limnology and Oceanography info:eu-repo/semantics/altIdentifier/doi/10.4319/lo.1992.37.2.0393 hal-03476517 https://hal.science/hal-03476517 doi:10.4319/lo.1992.37.2.0393 ISSN: 0024-3590 EISSN: 1939-5590 Limnology and Oceanography https://hal.science/hal-03476517 Limnology and Oceanography, 1992, 37 (2), pp.393-404. ⟨10.4319/lo.1992.37.2.0393⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 1992 ftsorbonneuniv https://doi.org/10.4319/lo.1992.37.2.0393 2024-07-25T23:47:52Z International audience Gut pigment degradation by females of the subantarctic copepod Drepanopus pectinatus was established by measurements of gut fluorescence prior to fecal pellet production. The total amount of pigment lost varied from 0 to 17% while the Chl a unrecovered as pheopigment ranged from 0 to 92%. A linear relationship was observed between food concentration and mean pigment loss per copepod but not with the level of pigment loss as a percentage of total ingestion (pigment destruction efficiency) which varied without clear pattern. A nested ANOVA indicated that pigment destruction efficiency was influenced primarily by the trophic history of the animals (66% of the total variance) and to a minor extent by the experimental food concentrations (12% of the total variance). The hypothesis that gut pigment loss could be related to digestive activity and influenced by digestive acclimation processes (trophic history) was confirmed by the significant exponential relationship between food concentration at the time of copepod capture and the experimentally derived destruction efficiency. Careful consideration should be given to the quantitative or qualitative nature of gut pigment measurements as an in situ index of ingestion. Article in Journal/Newspaper Antarc* Antarctic HAL Sorbonne Université Limnology and Oceanography 37 2 393 404 |
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Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
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[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Mayzaud, P Razouls, S DEGRADATION OF GUT PIGMENT DURING FEEDING BY A SUB-ANTARCTIC COPEPOD - IMPORTANCE OF FEEDING HISTORY AND DIGESTIVE ACCLIMATION |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Gut pigment degradation by females of the subantarctic copepod Drepanopus pectinatus was established by measurements of gut fluorescence prior to fecal pellet production. The total amount of pigment lost varied from 0 to 17% while the Chl a unrecovered as pheopigment ranged from 0 to 92%. A linear relationship was observed between food concentration and mean pigment loss per copepod but not with the level of pigment loss as a percentage of total ingestion (pigment destruction efficiency) which varied without clear pattern. A nested ANOVA indicated that pigment destruction efficiency was influenced primarily by the trophic history of the animals (66% of the total variance) and to a minor extent by the experimental food concentrations (12% of the total variance). The hypothesis that gut pigment loss could be related to digestive activity and influenced by digestive acclimation processes (trophic history) was confirmed by the significant exponential relationship between food concentration at the time of copepod capture and the experimentally derived destruction efficiency. Careful consideration should be given to the quantitative or qualitative nature of gut pigment measurements as an in situ index of ingestion. |
author2 |
Station Zoologique de Villefranche Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Mayzaud, P Razouls, S |
author_facet |
Mayzaud, P Razouls, S |
author_sort |
Mayzaud, P |
title |
DEGRADATION OF GUT PIGMENT DURING FEEDING BY A SUB-ANTARCTIC COPEPOD - IMPORTANCE OF FEEDING HISTORY AND DIGESTIVE ACCLIMATION |
title_short |
DEGRADATION OF GUT PIGMENT DURING FEEDING BY A SUB-ANTARCTIC COPEPOD - IMPORTANCE OF FEEDING HISTORY AND DIGESTIVE ACCLIMATION |
title_full |
DEGRADATION OF GUT PIGMENT DURING FEEDING BY A SUB-ANTARCTIC COPEPOD - IMPORTANCE OF FEEDING HISTORY AND DIGESTIVE ACCLIMATION |
title_fullStr |
DEGRADATION OF GUT PIGMENT DURING FEEDING BY A SUB-ANTARCTIC COPEPOD - IMPORTANCE OF FEEDING HISTORY AND DIGESTIVE ACCLIMATION |
title_full_unstemmed |
DEGRADATION OF GUT PIGMENT DURING FEEDING BY A SUB-ANTARCTIC COPEPOD - IMPORTANCE OF FEEDING HISTORY AND DIGESTIVE ACCLIMATION |
title_sort |
degradation of gut pigment during feeding by a sub-antarctic copepod - importance of feeding history and digestive acclimation |
publisher |
HAL CCSD |
publishDate |
1992 |
url |
https://hal.science/hal-03476517 https://doi.org/10.4319/lo.1992.37.2.0393 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0024-3590 EISSN: 1939-5590 Limnology and Oceanography https://hal.science/hal-03476517 Limnology and Oceanography, 1992, 37 (2), pp.393-404. ⟨10.4319/lo.1992.37.2.0393⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.4319/lo.1992.37.2.0393 hal-03476517 https://hal.science/hal-03476517 doi:10.4319/lo.1992.37.2.0393 |
op_doi |
https://doi.org/10.4319/lo.1992.37.2.0393 |
container_title |
Limnology and Oceanography |
container_volume |
37 |
container_issue |
2 |
container_start_page |
393 |
op_container_end_page |
404 |
_version_ |
1810497377749958656 |