To what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of Atlantic salmon (Salmo salar)
Limited research has been conducted on the physiology of Atlantic salmon (Salmo salar) at cold temperatures despite significant winter mortalities at sea-cage sites in Atlantic Canada. Thus, I performed two experiments to investigate how acclimation to 8, 4 and 1°C, and acute cooling from 8-1°C, aff...
Main Author: | |
---|---|
Format: | Thesis |
Language: | English |
Published: |
Memorial University of Newfoundland
2023
|
Subjects: | |
Online Access: | https://research.library.mun.ca/16041/ https://research.library.mun.ca/16041/1/converted.pdf |
id |
ftmemorialuniv:oai:research.library.mun.ca:16041 |
---|---|
record_format |
openpolar |
spelling |
ftmemorialuniv:oai:research.library.mun.ca:16041 2023-11-12T04:14:36+01:00 To what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of Atlantic salmon (Salmo salar) Porter, Emma 2023-06 application/pdf https://research.library.mun.ca/16041/ https://research.library.mun.ca/16041/1/converted.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/16041/1/converted.pdf Porter, Emma <https://research.library.mun.ca/view/creator_az/Porter=3AEmma=3A=3A.html> (2023) To what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of Atlantic salmon (Salmo salar). Masters thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 2023 ftmemorialuniv 2023-10-28T23:12:35Z Limited research has been conducted on the physiology of Atlantic salmon (Salmo salar) at cold temperatures despite significant winter mortalities at sea-cage sites in Atlantic Canada. Thus, I performed two experiments to investigate how acclimation to 8, 4 and 1°C, and acute cooling from 8-1°C, affected the Atlantic salmon’s cardiac function, metabolic capacity, stress physiology and swimming performance. While this research shows that exposure to 1oC causes stress, and significantly reduces their metabolism and swimming performance, it also reveals that there is significant flexibility/plasticity in how salmon modulate heart function when acutely vs. chronically exposed to cold temperatures. For example, the experiments were performed on salmon from two different aquaculture companies, and changes in resting heart rate and size were only seen in 1oC acclimated fish in Chapter 3. This data suggests that responses to cold temperatures differ between cultured salmon populations. Further, how salmon meet the energetic demands of exhaustive exercise depends on the duration of cold exposure [e.g., fish acutely cooled to 1℃ predominantly enhance tissue oxygen extraction, whereas those acclimated to this temperature increase stroke volume]. These studies add greatly to our understanding of how temperatures close to a salmon’s (fish’s) lower thermal limit impact its physiological capacity and the mechanisms involved. Thesis Atlantic salmon Salmo salar Memorial University of Newfoundland: Research Repository |
institution |
Open Polar |
collection |
Memorial University of Newfoundland: Research Repository |
op_collection_id |
ftmemorialuniv |
language |
English |
description |
Limited research has been conducted on the physiology of Atlantic salmon (Salmo salar) at cold temperatures despite significant winter mortalities at sea-cage sites in Atlantic Canada. Thus, I performed two experiments to investigate how acclimation to 8, 4 and 1°C, and acute cooling from 8-1°C, affected the Atlantic salmon’s cardiac function, metabolic capacity, stress physiology and swimming performance. While this research shows that exposure to 1oC causes stress, and significantly reduces their metabolism and swimming performance, it also reveals that there is significant flexibility/plasticity in how salmon modulate heart function when acutely vs. chronically exposed to cold temperatures. For example, the experiments were performed on salmon from two different aquaculture companies, and changes in resting heart rate and size were only seen in 1oC acclimated fish in Chapter 3. This data suggests that responses to cold temperatures differ between cultured salmon populations. Further, how salmon meet the energetic demands of exhaustive exercise depends on the duration of cold exposure [e.g., fish acutely cooled to 1℃ predominantly enhance tissue oxygen extraction, whereas those acclimated to this temperature increase stroke volume]. These studies add greatly to our understanding of how temperatures close to a salmon’s (fish’s) lower thermal limit impact its physiological capacity and the mechanisms involved. |
format |
Thesis |
author |
Porter, Emma |
spellingShingle |
Porter, Emma To what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of Atlantic salmon (Salmo salar) |
author_facet |
Porter, Emma |
author_sort |
Porter, Emma |
title |
To what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of Atlantic salmon (Salmo salar) |
title_short |
To what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of Atlantic salmon (Salmo salar) |
title_full |
To what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of Atlantic salmon (Salmo salar) |
title_fullStr |
To what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of Atlantic salmon (Salmo salar) |
title_full_unstemmed |
To what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of Atlantic salmon (Salmo salar) |
title_sort |
to what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of atlantic salmon (salmo salar) |
publisher |
Memorial University of Newfoundland |
publishDate |
2023 |
url |
https://research.library.mun.ca/16041/ https://research.library.mun.ca/16041/1/converted.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
https://research.library.mun.ca/16041/1/converted.pdf Porter, Emma <https://research.library.mun.ca/view/creator_az/Porter=3AEmma=3A=3A.html> (2023) To what extent do acute exposure and acclimation to cold temperatures impact the cardiorespiratory capacity, stress response and swimming performance of Atlantic salmon (Salmo salar). Masters thesis, Memorial University of Newfoundland. |
op_rights |
thesis_license |
_version_ |
1782332231760478208 |