Effects of habitat enrichment and food availability on the foraging behaviour of juvenile Atlantic Cod (Gadus morhua L)
The environment can play an important role in shaping how an animal behaves, and how well the animal performs in a particular environment can be influenced by early experiences. The tradition of releasing captive-reared juveniles into the wild in an effort to strengthen wild fish populations has oft...
Published in: | Environmental Biology of Fishes |
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Language: | English |
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Online Access: | https://hdl.handle.net/1956/5221 https://doi.org/10.1007/s10641-011-9803-5 |
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ftunivbergen:oai:bora.uib.no:1956/5221 2023-05-15T15:27:21+02:00 Effects of habitat enrichment and food availability on the foraging behaviour of juvenile Atlantic Cod (Gadus morhua L) Moberg, Olav Braithwaite, Victoria A. Jensen, Knut Helge Salvanes, Anne Gro Vea 2011-04-13 application/pdf https://hdl.handle.net/1956/5221 https://doi.org/10.1007/s10641-011-9803-5 eng eng urn:issn:0378-1909 https://hdl.handle.net/1956/5221 https://doi.org/10.1007/s10641-011-9803-5 Environmental Biology of Fishes 91(4): 449-457 832832 Creative Commons Attribution Noncommercial https://creativecommons.org/licenses/by-nc/2.0 Copyright the Author(s) 2011 Environmental Biology of Fishes 449-457 91 4 Atlantic cod Foraging behaviour VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Peer reviewed Journal article 2011 ftunivbergen https://doi.org/10.1007/s10641-011-9803-5 2023-03-14T17:42:20Z The environment can play an important role in shaping how an animal behaves, and how well the animal performs in a particular environment can be influenced by early experiences. The tradition of releasing captive-reared juveniles into the wild in an effort to strengthen wild fish populations has often had little success owing to high post-release mortality. Fish reared under standard hatchery conditions are provided with fewer stimuli and they receive excess quantities of pellet food that are easy to handle and consume. Captive reared fish therefore appear to be under-stimulated and overfed. Several studies have demonstrated that simple structural enrichment in the rearing facilities promotes flexible behaviour compared to fish reared in plain, standard hatchery tanks. Less attention has been given to the effects of the diet. Here we use a cross-factored design to test the relative role of food ration and spatial enrichment on foraging behaviour. Our results show that fish from enriched environments, regardless of previous food-ration size, were more reluctant to start feeding on the first day in a novel arena. On day two and three, however, fish with prior experience of a low food ration showed greater foraging activity and efficiency than fish fed on full rations. On the second and third day, prior experience with enrichment was less important. We discuss how early feeding experience in combination with structural enrichment may contribute in producing fish that are better suited for release into the wild. publishedVersion Article in Journal/Newspaper atlantic cod Gadus morhua University of Bergen: Bergen Open Research Archive (BORA-UiB) Environmental Biology of Fishes 91 4 449 457 |
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Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Atlantic cod Foraging behaviour VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 |
spellingShingle |
Atlantic cod Foraging behaviour VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Moberg, Olav Braithwaite, Victoria A. Jensen, Knut Helge Salvanes, Anne Gro Vea Effects of habitat enrichment and food availability on the foraging behaviour of juvenile Atlantic Cod (Gadus morhua L) |
topic_facet |
Atlantic cod Foraging behaviour VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 |
description |
The environment can play an important role in shaping how an animal behaves, and how well the animal performs in a particular environment can be influenced by early experiences. The tradition of releasing captive-reared juveniles into the wild in an effort to strengthen wild fish populations has often had little success owing to high post-release mortality. Fish reared under standard hatchery conditions are provided with fewer stimuli and they receive excess quantities of pellet food that are easy to handle and consume. Captive reared fish therefore appear to be under-stimulated and overfed. Several studies have demonstrated that simple structural enrichment in the rearing facilities promotes flexible behaviour compared to fish reared in plain, standard hatchery tanks. Less attention has been given to the effects of the diet. Here we use a cross-factored design to test the relative role of food ration and spatial enrichment on foraging behaviour. Our results show that fish from enriched environments, regardless of previous food-ration size, were more reluctant to start feeding on the first day in a novel arena. On day two and three, however, fish with prior experience of a low food ration showed greater foraging activity and efficiency than fish fed on full rations. On the second and third day, prior experience with enrichment was less important. We discuss how early feeding experience in combination with structural enrichment may contribute in producing fish that are better suited for release into the wild. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Moberg, Olav Braithwaite, Victoria A. Jensen, Knut Helge Salvanes, Anne Gro Vea |
author_facet |
Moberg, Olav Braithwaite, Victoria A. Jensen, Knut Helge Salvanes, Anne Gro Vea |
author_sort |
Moberg, Olav |
title |
Effects of habitat enrichment and food availability on the foraging behaviour of juvenile Atlantic Cod (Gadus morhua L) |
title_short |
Effects of habitat enrichment and food availability on the foraging behaviour of juvenile Atlantic Cod (Gadus morhua L) |
title_full |
Effects of habitat enrichment and food availability on the foraging behaviour of juvenile Atlantic Cod (Gadus morhua L) |
title_fullStr |
Effects of habitat enrichment and food availability on the foraging behaviour of juvenile Atlantic Cod (Gadus morhua L) |
title_full_unstemmed |
Effects of habitat enrichment and food availability on the foraging behaviour of juvenile Atlantic Cod (Gadus morhua L) |
title_sort |
effects of habitat enrichment and food availability on the foraging behaviour of juvenile atlantic cod (gadus morhua l) |
publishDate |
2011 |
url |
https://hdl.handle.net/1956/5221 https://doi.org/10.1007/s10641-011-9803-5 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Environmental Biology of Fishes 449-457 91 4 |
op_relation |
urn:issn:0378-1909 https://hdl.handle.net/1956/5221 https://doi.org/10.1007/s10641-011-9803-5 Environmental Biology of Fishes 91(4): 449-457 832832 |
op_rights |
Creative Commons Attribution Noncommercial https://creativecommons.org/licenses/by-nc/2.0 Copyright the Author(s) 2011 |
op_doi |
https://doi.org/10.1007/s10641-011-9803-5 |
container_title |
Environmental Biology of Fishes |
container_volume |
91 |
container_issue |
4 |
container_start_page |
449 |
op_container_end_page |
457 |
_version_ |
1766357789271130112 |