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...

Full description

Bibliographic Details
Published in:Journal of Fish Biology
Main Authors: Couturier, C. S., Andersen, N. G., Audet, C., Chabot, D.
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2013
Subjects:
Online Access:http://dx.doi.org/10.1111/jfb.12005
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.12005
https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.12005
id crwiley:10.1111/jfb.12005
record_format openpolar
spelling crwiley:10.1111/jfb.12005 2024-09-09T19:29:43+00:00 Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua Couturier, C. S. Andersen, N. G. Audet, C. Chabot, D. 2013 http://dx.doi.org/10.1111/jfb.12005 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.12005 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.12005 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 82, issue 3, page 789-805 ISSN 0022-1112 1095-8649 journal-article 2013 crwiley https://doi.org/10.1111/jfb.12005 2024-08-01T04:24:06Z 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 Wiley Online Library Journal of Fish Biology 82 3 789 805
institution Open Polar
collection Wiley Online Library
op_collection_id crwiley
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, D.
spellingShingle Couturier, C. S.
Andersen, N. G.
Audet, C.
Chabot, D.
Prey exoskeletons influence the course of gastric evacuation in Atlantic cod Gadus morhua
author_facet Couturier, C. S.
Andersen, N. G.
Audet, C.
Chabot, D.
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
publisher Wiley
publishDate 2013
url http://dx.doi.org/10.1111/jfb.12005
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.12005
https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.12005
genre atlantic cod
Chionoecetes opilio
Gadus morhua
Pandalus borealis
genre_facet atlantic cod
Chionoecetes opilio
Gadus morhua
Pandalus borealis
op_source Journal of Fish Biology
volume 82, issue 3, page 789-805
ISSN 0022-1112 1095-8649
op_rights http://onlinelibrary.wiley.com/termsAndConditions#vor
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
_version_ 1809898834096029696