Effects of copepod size on fish growth: A model based on data for North Sea sandeel
In productive marine off-shore ecosystems, the flow of energy from zooplankton to large predators is channeled through a few species of short-lived, highly abundant schooling planktivorous fish. There are indications that these species respond to qualitative and phenological changes in the zooplankt...
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Online Access: | http://hdl.handle.net/1956/11680 https://doi.org/10.3354/meps11092 |
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ftunivbergen:oai:bora.uib.no:1956/11680 2023-05-15T15:12:43+02:00 Effects of copepod size on fish growth: A model based on data for North Sea sandeel Van Deurs, Mikael Jørgensen, Christian Fiksen, Øyvind 2015-12-30T17:03:22Z application/pdf http://hdl.handle.net/1956/11680 https://doi.org/10.3354/meps11092 eng eng Inter-Research Science Center urn:issn:0171-8630 http://hdl.handle.net/1956/11680 https://doi.org/10.3354/meps11092 cristin:1248627 Attribution CC BY 3.0 http://creativecommons.org/licenses/by/3.0 Copyright the authors 2015 Prey preference Bioenergetics Optimal foraging North Sea regime-shift Climate change Ammodytes Holling disc Calanus Handling time limitation Food quality VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400 Peer reviewed Journal article 2015 ftunivbergen https://doi.org/10.3354/meps11092 2023-03-14T17:43:55Z In productive marine off-shore ecosystems, the flow of energy from zooplankton to large predators is channeled through a few species of short-lived, highly abundant schooling planktivorous fish. There are indications that these species respond to qualitative and phenological changes in the zooplankton. If so, the climate-induced alterations of the local copepod communities that we see in temperate and arctic regions may influence the energy flux in marine food chains. In order to investigate how different processes contribute to the relationship between copepod size and fish growth, we merged 2 mechanistic models from relevant data: (1) a model of the bioenergetics and stomach filling/evacuation dynamics, and (2) a Holling type II functional response model that encompasses visual range from basic principles. The model predicts that going from a situation where large Calanus copepods (2 mm) dominate the prey field of lesser sandeel Ammodytes marinus in the central North Sea to a situation where only relatively small (1 mm) and less energy-rich copepods are available roughly halves the energy intake of sandeels even if prey biomass concentration remains constant. Visual constraint on foraging was the most important factor, followed by handling time limitation and prey energy content. These limitations became stronger with increasing fish length, showing that copepod size and energy content have a strong effect on the specific growth potential of these fish. publishedVersion Article in Journal/Newspaper Arctic Climate change Zooplankton Copepods University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Marine Ecology Progress Series 520 235 243 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Prey preference Bioenergetics Optimal foraging North Sea regime-shift Climate change Ammodytes Holling disc Calanus Handling time limitation Food quality VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400 |
spellingShingle |
Prey preference Bioenergetics Optimal foraging North Sea regime-shift Climate change Ammodytes Holling disc Calanus Handling time limitation Food quality VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400 Van Deurs, Mikael Jørgensen, Christian Fiksen, Øyvind Effects of copepod size on fish growth: A model based on data for North Sea sandeel |
topic_facet |
Prey preference Bioenergetics Optimal foraging North Sea regime-shift Climate change Ammodytes Holling disc Calanus Handling time limitation Food quality VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400 |
description |
In productive marine off-shore ecosystems, the flow of energy from zooplankton to large predators is channeled through a few species of short-lived, highly abundant schooling planktivorous fish. There are indications that these species respond to qualitative and phenological changes in the zooplankton. If so, the climate-induced alterations of the local copepod communities that we see in temperate and arctic regions may influence the energy flux in marine food chains. In order to investigate how different processes contribute to the relationship between copepod size and fish growth, we merged 2 mechanistic models from relevant data: (1) a model of the bioenergetics and stomach filling/evacuation dynamics, and (2) a Holling type II functional response model that encompasses visual range from basic principles. The model predicts that going from a situation where large Calanus copepods (2 mm) dominate the prey field of lesser sandeel Ammodytes marinus in the central North Sea to a situation where only relatively small (1 mm) and less energy-rich copepods are available roughly halves the energy intake of sandeels even if prey biomass concentration remains constant. Visual constraint on foraging was the most important factor, followed by handling time limitation and prey energy content. These limitations became stronger with increasing fish length, showing that copepod size and energy content have a strong effect on the specific growth potential of these fish. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Van Deurs, Mikael Jørgensen, Christian Fiksen, Øyvind |
author_facet |
Van Deurs, Mikael Jørgensen, Christian Fiksen, Øyvind |
author_sort |
Van Deurs, Mikael |
title |
Effects of copepod size on fish growth: A model based on data for North Sea sandeel |
title_short |
Effects of copepod size on fish growth: A model based on data for North Sea sandeel |
title_full |
Effects of copepod size on fish growth: A model based on data for North Sea sandeel |
title_fullStr |
Effects of copepod size on fish growth: A model based on data for North Sea sandeel |
title_full_unstemmed |
Effects of copepod size on fish growth: A model based on data for North Sea sandeel |
title_sort |
effects of copepod size on fish growth: a model based on data for north sea sandeel |
publisher |
Inter-Research Science Center |
publishDate |
2015 |
url |
http://hdl.handle.net/1956/11680 https://doi.org/10.3354/meps11092 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Zooplankton Copepods |
genre_facet |
Arctic Climate change Zooplankton Copepods |
op_relation |
urn:issn:0171-8630 http://hdl.handle.net/1956/11680 https://doi.org/10.3354/meps11092 cristin:1248627 |
op_rights |
Attribution CC BY 3.0 http://creativecommons.org/licenses/by/3.0 Copyright the authors 2015 |
op_doi |
https://doi.org/10.3354/meps11092 |
container_title |
Marine Ecology Progress Series |
container_volume |
520 |
container_start_page |
235 |
op_container_end_page |
243 |
_version_ |
1766343360716472320 |