Precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes
Without evaluating precision, gastric evacuation models in combination with stomach data are widely used to investigate the feeding biology of wild predatory fishes. Assuming each predator individual to operate with its own evacuation rate parameter, the precision of estimated ingestion times for in...
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Language: | English |
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2008
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Online Access: | https://orbit.dtu.dk/en/publications/5fad1b85-aa80-481c-ac1f-a8b26f6506c2 https://doi.org/10.1016/j.fishres.2007.12.007 |
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ftdtupubl:oai:pure.atira.dk:publications/5fad1b85-aa80-481c-ac1f-a8b26f6506c2 2024-09-15T17:55:31+00:00 Precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes Andersen, Niels Gerner Beyer, Jan 2008 https://orbit.dtu.dk/en/publications/5fad1b85-aa80-481c-ac1f-a8b26f6506c2 https://doi.org/10.1016/j.fishres.2007.12.007 eng eng https://orbit.dtu.dk/en/publications/5fad1b85-aa80-481c-ac1f-a8b26f6506c2 info:eu-repo/semantics/restrictedAccess Andersen , N G & Beyer , J 2008 , ' Precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes ' , Fisheries Research , vol. 92 , no. 1 , pp. 11-22 . https://doi.org/10.1016/j.fishres.2007.12.007 Erhvervsfiskeri article 2008 ftdtupubl https://doi.org/10.1016/j.fishres.2007.12.007 2024-07-01T23:52:53Z Without evaluating precision, gastric evacuation models in combination with stomach data are widely used to investigate the feeding biology of wild predatory fishes. Assuming each predator individual to operate with its own evacuation rate parameter, the precision of estimated ingestion times for individual prey in the stomachs of predatory fishes was derived in this study. This way, the variability of gastric evacuation not accounted for by a deterministic model of gastric evacuation was described. The variability of initial body mass of ingested prey was included as well. General values 0.03 and 0.10 of the coefficients of variation sigma(m) and sigma(e) were obtained for the square root of initial prey mass and the evacuation rate parameter, respectively. They were estimated from length-mass data on a variety of fresh prey fishes and from data on gastric evacuation in the predatory gadoids whiting (Merlangius merlangus), Atlantic cod (Gadus morhua), and saithe (pollock) (Pollachius virens). Deriving the variance of gastric evacuation rate, evacuation time, and remaining prey mass, the study also established a basis for statistical analyses of the results obtained from laboratory experiments on gastric evacuation. (C) 2007 Elsevier B.V. All rights reserved. Article in Journal/Newspaper atlantic cod Gadus morhua Technical University of Denmark: DTU Orbit Fisheries Research 92 1 11 22 |
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Open Polar |
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Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Erhvervsfiskeri |
spellingShingle |
Erhvervsfiskeri Andersen, Niels Gerner Beyer, Jan Precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes |
topic_facet |
Erhvervsfiskeri |
description |
Without evaluating precision, gastric evacuation models in combination with stomach data are widely used to investigate the feeding biology of wild predatory fishes. Assuming each predator individual to operate with its own evacuation rate parameter, the precision of estimated ingestion times for individual prey in the stomachs of predatory fishes was derived in this study. This way, the variability of gastric evacuation not accounted for by a deterministic model of gastric evacuation was described. The variability of initial body mass of ingested prey was included as well. General values 0.03 and 0.10 of the coefficients of variation sigma(m) and sigma(e) were obtained for the square root of initial prey mass and the evacuation rate parameter, respectively. They were estimated from length-mass data on a variety of fresh prey fishes and from data on gastric evacuation in the predatory gadoids whiting (Merlangius merlangus), Atlantic cod (Gadus morhua), and saithe (pollock) (Pollachius virens). Deriving the variance of gastric evacuation rate, evacuation time, and remaining prey mass, the study also established a basis for statistical analyses of the results obtained from laboratory experiments on gastric evacuation. (C) 2007 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Andersen, Niels Gerner Beyer, Jan |
author_facet |
Andersen, Niels Gerner Beyer, Jan |
author_sort |
Andersen, Niels Gerner |
title |
Precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes |
title_short |
Precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes |
title_full |
Precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes |
title_fullStr |
Precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes |
title_full_unstemmed |
Precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes |
title_sort |
precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes |
publishDate |
2008 |
url |
https://orbit.dtu.dk/en/publications/5fad1b85-aa80-481c-ac1f-a8b26f6506c2 https://doi.org/10.1016/j.fishres.2007.12.007 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Andersen , N G & Beyer , J 2008 , ' Precision of ingestion time and evacuation predictors for individual prey in stomachs of predatory fishes ' , Fisheries Research , vol. 92 , no. 1 , pp. 11-22 . https://doi.org/10.1016/j.fishres.2007.12.007 |
op_relation |
https://orbit.dtu.dk/en/publications/5fad1b85-aa80-481c-ac1f-a8b26f6506c2 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.fishres.2007.12.007 |
container_title |
Fisheries Research |
container_volume |
92 |
container_issue |
1 |
container_start_page |
11 |
op_container_end_page |
22 |
_version_ |
1810431793039409152 |