Early environmental effects on dominance in juvenile Atlantic salmon (Salmo salar L.)
The earth’s climate is rapidly changing. With climate change currently altering the environment, water temperature is an important environmental factor that will have various effects on fishes since they are ectotherms. As the changes are expected to be greatest during winter, when salmonid fishes...
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ftkarlstadsuniv:oai:DiVA.org:kau-55304 2024-06-09T07:44:49+00:00 Early environmental effects on dominance in juvenile Atlantic salmon (Salmo salar L.) Tidiga miljöeffekters påverkan på dominans hos juvenil lax (Salmo salar L.) Leksell, Lina 2017 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-55304 eng eng Karlstads universitet http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-55304 info:eu-repo/semantics/openAccess Atlantic salmon salmon salmonids fish temperature incubation temperature climate change behaviour lax laxfiskar fisk temperatur inkuberingstemperatur klimatförändringar beteende Biological Sciences Biologiska vetenskaper Student thesis info:eu-repo/semantics/bachelorThesis text 2017 ftkarlstadsuniv 2024-05-15T09:05:11Z The earth’s climate is rapidly changing. With climate change currently altering the environment, water temperature is an important environmental factor that will have various effects on fishes since they are ectotherms. As the changes are expected to be greatest during winter, when salmonid fishes incubate their eggs, one might expect substantial effects on egg development. In this experiment pairs of fish, matched by length, were compared. For each pair, one fish had experienced ambient cold temperatures (cold treatment) during embryogenesis and the other elevated temperatures (warm treatment, ca. 4-5 oC). The fish were tested in stream. Aggressive interactions were recorded and dominance was determined by scoring each fish’s position relative to where food was delivered from and the amount of food taken. Salmon from the cold treatment had a strong tendency to have a higher dominance score than salmon from the warm treatment. The individual with the highest dominance score was not consistently larger or smaller than the individual with the lower dominance score. The results support the hypothesis that salmonids exposed to a cold environment during embryogenesis will be more dominant. Due to climate change, it is expected that water temperature will continue to rise in the future, which in turn will alter the fish’s behaviour. Jordens klimat förändras snabbt. Med klimatförändringar som för närvarande förändrar miljön är vattentemperaturen en viktig miljöfaktor som kommer att ha olika effekter på fiskar eftersom de är ektoterma. Eftersom förändringarna förväntas vara störst under vintern, när laxfiskar inkuberar sina ägg, kan man förvänta sig betydande effekter på äggutvecklingen. I det här experimentet jämfördes fisk par, matchade med längd. För varje par hade en fisk upplevt kalla vattentemperaturer (kall behandling) under embryogenesen och de andra förhöjda temperaturerna (varm behandling, ca 4-5 oC). Fisken testades i strömakvarie. Aggressiva interaktioner registrerades ... Bachelor Thesis Atlantic salmon Salmo salar Karlstad University: Publications (DIVA) Kalla ENVELOPE(19.617,19.617,67.050,67.050) |
institution |
Open Polar |
collection |
Karlstad University: Publications (DIVA) |
op_collection_id |
ftkarlstadsuniv |
language |
English |
topic |
Atlantic salmon salmon salmonids fish temperature incubation temperature climate change behaviour lax laxfiskar fisk temperatur inkuberingstemperatur klimatförändringar beteende Biological Sciences Biologiska vetenskaper |
spellingShingle |
Atlantic salmon salmon salmonids fish temperature incubation temperature climate change behaviour lax laxfiskar fisk temperatur inkuberingstemperatur klimatförändringar beteende Biological Sciences Biologiska vetenskaper Leksell, Lina Early environmental effects on dominance in juvenile Atlantic salmon (Salmo salar L.) |
topic_facet |
Atlantic salmon salmon salmonids fish temperature incubation temperature climate change behaviour lax laxfiskar fisk temperatur inkuberingstemperatur klimatförändringar beteende Biological Sciences Biologiska vetenskaper |
description |
The earth’s climate is rapidly changing. With climate change currently altering the environment, water temperature is an important environmental factor that will have various effects on fishes since they are ectotherms. As the changes are expected to be greatest during winter, when salmonid fishes incubate their eggs, one might expect substantial effects on egg development. In this experiment pairs of fish, matched by length, were compared. For each pair, one fish had experienced ambient cold temperatures (cold treatment) during embryogenesis and the other elevated temperatures (warm treatment, ca. 4-5 oC). The fish were tested in stream. Aggressive interactions were recorded and dominance was determined by scoring each fish’s position relative to where food was delivered from and the amount of food taken. Salmon from the cold treatment had a strong tendency to have a higher dominance score than salmon from the warm treatment. The individual with the highest dominance score was not consistently larger or smaller than the individual with the lower dominance score. The results support the hypothesis that salmonids exposed to a cold environment during embryogenesis will be more dominant. Due to climate change, it is expected that water temperature will continue to rise in the future, which in turn will alter the fish’s behaviour. Jordens klimat förändras snabbt. Med klimatförändringar som för närvarande förändrar miljön är vattentemperaturen en viktig miljöfaktor som kommer att ha olika effekter på fiskar eftersom de är ektoterma. Eftersom förändringarna förväntas vara störst under vintern, när laxfiskar inkuberar sina ägg, kan man förvänta sig betydande effekter på äggutvecklingen. I det här experimentet jämfördes fisk par, matchade med längd. För varje par hade en fisk upplevt kalla vattentemperaturer (kall behandling) under embryogenesen och de andra förhöjda temperaturerna (varm behandling, ca 4-5 oC). Fisken testades i strömakvarie. Aggressiva interaktioner registrerades ... |
format |
Bachelor Thesis |
author |
Leksell, Lina |
author_facet |
Leksell, Lina |
author_sort |
Leksell, Lina |
title |
Early environmental effects on dominance in juvenile Atlantic salmon (Salmo salar L.) |
title_short |
Early environmental effects on dominance in juvenile Atlantic salmon (Salmo salar L.) |
title_full |
Early environmental effects on dominance in juvenile Atlantic salmon (Salmo salar L.) |
title_fullStr |
Early environmental effects on dominance in juvenile Atlantic salmon (Salmo salar L.) |
title_full_unstemmed |
Early environmental effects on dominance in juvenile Atlantic salmon (Salmo salar L.) |
title_sort |
early environmental effects on dominance in juvenile atlantic salmon (salmo salar l.) |
publisher |
Karlstads universitet |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-55304 |
long_lat |
ENVELOPE(19.617,19.617,67.050,67.050) |
geographic |
Kalla |
geographic_facet |
Kalla |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-55304 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1801373628541960192 |