Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua
This study examined the effects of prey exoskeleton characteristics on gastric evacuation patterns in Atlantic cod Gadus morhua. Three distinct stages were highlighted in the gastric evacuation of crustacean prey characterized by a robust exoskeleton. The experiments confirmed that the three shrimp...
Published in: | Journal of Fish Biology |
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2013
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Online Access: | https://orbit.dtu.dk/en/publications/8639d0f7-ce53-4647-8101-bb95bf0f2abc https://doi.org/10.1111/jfb.12005 http://onlinelibrary.wiley.com.globalproxy.cvt.dk/doi/10.1111/jfb.12005/pdf |
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ftdtupubl:oai:pure.atira.dk:publications/8639d0f7-ce53-4647-8101-bb95bf0f2abc 2023-05-15T15:27:11+02:00 Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua Couturier, C. S. Andersen, N. G. Audet, C. Chabot, Denis 2013 https://orbit.dtu.dk/en/publications/8639d0f7-ce53-4647-8101-bb95bf0f2abc https://doi.org/10.1111/jfb.12005 http://onlinelibrary.wiley.com.globalproxy.cvt.dk/doi/10.1111/jfb.12005/pdf eng eng info:eu-repo/semantics/closedAccess Couturier , C S , Andersen , N G , Audet , C & Chabot , D 2013 , ' Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua ' , Journal of Fish Biology , vol. 82 , no. 3 , pp. 789-805 . https://doi.org/10.1111/jfb.12005 article 2013 ftdtupubl https://doi.org/10.1111/jfb.12005 2023-01-04T23:58:55Z This study examined the effects of prey exoskeleton characteristics on gastric evacuation patterns in Atlantic cod Gadus morhua. Three distinct stages were highlighted in the gastric evacuation of crustacean prey characterized by a robust exoskeleton. The experiments confirmed that the three shrimp species, Pandalus borealis, Pandalus montagui and Eualus macilentus, and the crab Chionoecetes opilio, were evacuated from the stomach at different rates. The duration of all stages increased with increasing ash (and carbonate) content of the fresh prey. Thickness, chemical composition and morphology of the prey exoskeleton all affected gastric evacuation: duration of initial delay, overall evacuation rate and a decreased evacuation rate at the end of the process. The power exponential function (PEF), with its shape parameter, described the course of evacuation for these prey types well, especially the initial delay. The PEF does not, however, allow describing evacuation by the current stomach content mass independent of meal size, which limits its usefulness in estimating consumption rates of wild G. morhua. To predict and describe gastric evacuation of prey with a robust exoskeleton, it is therefore suggested that the square-root function be expanded with an initial lag phase, coupled to the mechanistically based cylinder model of gastric evacuation Article in Journal/Newspaper atlantic cod Chionoecetes opilio Gadus morhua Pandalus borealis Technical University of Denmark: DTU Orbit Journal of Fish Biology 82 3 789 805 |
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Technical University of Denmark: DTU Orbit |
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ftdtupubl |
language |
English |
description |
This study examined the effects of prey exoskeleton characteristics on gastric evacuation patterns in Atlantic cod Gadus morhua. Three distinct stages were highlighted in the gastric evacuation of crustacean prey characterized by a robust exoskeleton. The experiments confirmed that the three shrimp species, Pandalus borealis, Pandalus montagui and Eualus macilentus, and the crab Chionoecetes opilio, were evacuated from the stomach at different rates. The duration of all stages increased with increasing ash (and carbonate) content of the fresh prey. Thickness, chemical composition and morphology of the prey exoskeleton all affected gastric evacuation: duration of initial delay, overall evacuation rate and a decreased evacuation rate at the end of the process. The power exponential function (PEF), with its shape parameter, described the course of evacuation for these prey types well, especially the initial delay. The PEF does not, however, allow describing evacuation by the current stomach content mass independent of meal size, which limits its usefulness in estimating consumption rates of wild G. morhua. To predict and describe gastric evacuation of prey with a robust exoskeleton, it is therefore suggested that the square-root function be expanded with an initial lag phase, coupled to the mechanistically based cylinder model of gastric evacuation |
format |
Article in Journal/Newspaper |
author |
Couturier, C. S. Andersen, N. G. Audet, C. Chabot, Denis |
spellingShingle |
Couturier, C. S. Andersen, N. G. Audet, C. Chabot, Denis Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua |
author_facet |
Couturier, C. S. Andersen, N. G. Audet, C. Chabot, Denis |
author_sort |
Couturier, C. S. |
title |
Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua |
title_short |
Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua |
title_full |
Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua |
title_fullStr |
Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua |
title_full_unstemmed |
Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua |
title_sort |
prey exoskeletons influence the course of gastric evacuation in atlantic cod gadus morhua |
publishDate |
2013 |
url |
https://orbit.dtu.dk/en/publications/8639d0f7-ce53-4647-8101-bb95bf0f2abc https://doi.org/10.1111/jfb.12005 http://onlinelibrary.wiley.com.globalproxy.cvt.dk/doi/10.1111/jfb.12005/pdf |
genre |
atlantic cod Chionoecetes opilio Gadus morhua Pandalus borealis |
genre_facet |
atlantic cod Chionoecetes opilio Gadus morhua Pandalus borealis |
op_source |
Couturier , C S , Andersen , N G , Audet , C & Chabot , D 2013 , ' Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua ' , Journal of Fish Biology , vol. 82 , no. 3 , pp. 789-805 . https://doi.org/10.1111/jfb.12005 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/jfb.12005 |
container_title |
Journal of Fish Biology |
container_volume |
82 |
container_issue |
3 |
container_start_page |
789 |
op_container_end_page |
805 |
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1766357636531355648 |