Winter Behavior of Juvenile Brown Trout in a Changing Climate : How Do Light and Ice Cover Affect Encounters with Instream Predators?
During winter, stream fishes are vulnerable to semi-aquatic predators like mammals and birds and reduce encounters by being active in darkness or under surface ice. Less is known about the behavior of fishes towards instream piscivorous fishes. Here, we examined how surface ice and light affected th...
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Karlstads universitet, Institutionen för miljö- och livsvetenskaper (from 2013)
2023
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-88204 https://doi.org/10.3390/fishes8100521 |
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ftkarlstadsuniv:oai:DiVA.org:kau-88204 2023-12-24T10:15:40+01:00 Winter Behavior of Juvenile Brown Trout in a Changing Climate : How Do Light and Ice Cover Affect Encounters with Instream Predators? Filipsson, Karl Åsman, Veronika Greenberg, Larry Österling, Martin Watz, Johan Bergman, Eva 2023 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-88204 https://doi.org/10.3390/fishes8100521 eng eng Karlstads universitet, Institutionen för miljö- och livsvetenskaper (from 2013) Fishes, 2023, 8:10, orcid:0000-0003-0762-6551 orcid:0000-0002-3191-7140 orcid:0000-0001-6758-5857 orcid:0000-0002-4417-6636 orcid:0000-0003-2220-1615 http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-88204 doi:10.3390/fishes8100521 ISI:001089943500001 Scopus 2-s2.0-85175046960 info:eu-repo/semantics/openAccess anti-predator global changer diel behavior foraging piscivores predators Ecology Ekologi Zoology Zoologi Article in journal info:eu-repo/semantics/article text 2023 ftkarlstadsuniv https://doi.org/10.3390/fishes8100521 2023-11-29T23:33:13Z During winter, stream fishes are vulnerable to semi-aquatic predators like mammals and birds and reduce encounters by being active in darkness or under surface ice. Less is known about the behavior of fishes towards instream piscivorous fishes. Here, we examined how surface ice and light affected the anti-predator behavior of juvenile brown trout (Salmo trutta Linnaeus, 1758) in relation to piscivorous burbot (Lota lota Linnaeus, 1758) and northern pike (Esox lucius Linnaeus, 1758) at 4 degrees C in experimental flumes. Trout had lower foraging and swimming activity and spent more time sheltering when predators were present than when absent. In daylight, trout's swimming activity was not affected by predators, whereas in darkness trout were less active when predators were present. Trout consumed more drifting prey during the day when ice was present, and they positioned themselves further upstream when under ice cover, regardless of light conditions. Trout stayed closer to conspecifics under ice, but only in the presence of pike. Piscivorous fishes thus constitute an essential part of the predatory landscape of juvenile trout in winter, and thus loss of ice cover caused by climate warming will likely affect trout's interactions with predators. This paper was included as a manuscript in doctoral thesis entitled "Early life stages of brown trout - Anti-predator responses under warming winters" 2022:2 Article in Journal/Newspaper Burbot Lota lota lota Karlstad University: Publications (DIVA) Fishes 8 10 521 |
institution |
Open Polar |
collection |
Karlstad University: Publications (DIVA) |
op_collection_id |
ftkarlstadsuniv |
language |
English |
topic |
anti-predator global changer diel behavior foraging piscivores predators Ecology Ekologi Zoology Zoologi |
spellingShingle |
anti-predator global changer diel behavior foraging piscivores predators Ecology Ekologi Zoology Zoologi Filipsson, Karl Åsman, Veronika Greenberg, Larry Österling, Martin Watz, Johan Bergman, Eva Winter Behavior of Juvenile Brown Trout in a Changing Climate : How Do Light and Ice Cover Affect Encounters with Instream Predators? |
topic_facet |
anti-predator global changer diel behavior foraging piscivores predators Ecology Ekologi Zoology Zoologi |
description |
During winter, stream fishes are vulnerable to semi-aquatic predators like mammals and birds and reduce encounters by being active in darkness or under surface ice. Less is known about the behavior of fishes towards instream piscivorous fishes. Here, we examined how surface ice and light affected the anti-predator behavior of juvenile brown trout (Salmo trutta Linnaeus, 1758) in relation to piscivorous burbot (Lota lota Linnaeus, 1758) and northern pike (Esox lucius Linnaeus, 1758) at 4 degrees C in experimental flumes. Trout had lower foraging and swimming activity and spent more time sheltering when predators were present than when absent. In daylight, trout's swimming activity was not affected by predators, whereas in darkness trout were less active when predators were present. Trout consumed more drifting prey during the day when ice was present, and they positioned themselves further upstream when under ice cover, regardless of light conditions. Trout stayed closer to conspecifics under ice, but only in the presence of pike. Piscivorous fishes thus constitute an essential part of the predatory landscape of juvenile trout in winter, and thus loss of ice cover caused by climate warming will likely affect trout's interactions with predators. This paper was included as a manuscript in doctoral thesis entitled "Early life stages of brown trout - Anti-predator responses under warming winters" 2022:2 |
format |
Article in Journal/Newspaper |
author |
Filipsson, Karl Åsman, Veronika Greenberg, Larry Österling, Martin Watz, Johan Bergman, Eva |
author_facet |
Filipsson, Karl Åsman, Veronika Greenberg, Larry Österling, Martin Watz, Johan Bergman, Eva |
author_sort |
Filipsson, Karl |
title |
Winter Behavior of Juvenile Brown Trout in a Changing Climate : How Do Light and Ice Cover Affect Encounters with Instream Predators? |
title_short |
Winter Behavior of Juvenile Brown Trout in a Changing Climate : How Do Light and Ice Cover Affect Encounters with Instream Predators? |
title_full |
Winter Behavior of Juvenile Brown Trout in a Changing Climate : How Do Light and Ice Cover Affect Encounters with Instream Predators? |
title_fullStr |
Winter Behavior of Juvenile Brown Trout in a Changing Climate : How Do Light and Ice Cover Affect Encounters with Instream Predators? |
title_full_unstemmed |
Winter Behavior of Juvenile Brown Trout in a Changing Climate : How Do Light and Ice Cover Affect Encounters with Instream Predators? |
title_sort |
winter behavior of juvenile brown trout in a changing climate : how do light and ice cover affect encounters with instream predators? |
publisher |
Karlstads universitet, Institutionen för miljö- och livsvetenskaper (from 2013) |
publishDate |
2023 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-88204 https://doi.org/10.3390/fishes8100521 |
genre |
Burbot Lota lota lota |
genre_facet |
Burbot Lota lota lota |
op_relation |
Fishes, 2023, 8:10, orcid:0000-0003-0762-6551 orcid:0000-0002-3191-7140 orcid:0000-0001-6758-5857 orcid:0000-0002-4417-6636 orcid:0000-0003-2220-1615 http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-88204 doi:10.3390/fishes8100521 ISI:001089943500001 Scopus 2-s2.0-85175046960 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/fishes8100521 |
container_title |
Fishes |
container_volume |
8 |
container_issue |
10 |
container_start_page |
521 |
_version_ |
1786202748695347200 |