- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Theses and Dissertations /
- Factors affecting swimbladder volume in rainbow trout...
Open Collections
UBC Theses and Dissertations
UBC Theses and Dissertations
Factors affecting swimbladder volume in rainbow trout (Salmo gairdneri) held in gas suppersaturated water Shrimpton, James Mark
Abstract
I examined the response of the rainbow trout. CSalmo gairdneriJ swimbladder bo gas supersaturated water. Cannulas positioned in the swimbladder of fish were connected to a pressure transducer, facilitating direct measurement of swimbladder pressure. Fish held in supersaturated water showed an increase in swimbladder pressure. The response showed a strong dependence on the total gas pressure and the oxygen partial pressure of the water. The minimum level of gas supersaturation observed to cause this response was a ΔP of 27 mmHg CPO₂ = 160 mmHg). Swimbladder pressure increased until gas was forced out the pneumatic duct. The pneumatic duct release pressure is size dependent, with greater pressure required to expel swimbladder gas in smaller fish. The expansion of the swimbladder due to increased pressure causes a decrease in density. The buoyant force created by decreased density is greatest for fish below 10g. These fish seek depth to compensate for swimbladder overinflation.
Item Metadata
Title |
Factors affecting swimbladder volume in rainbow trout (Salmo gairdneri) held in gas suppersaturated water
|
Creator | |
Publisher |
University of British Columbia
|
Date Issued |
1987
|
Description |
I examined the response of the rainbow trout. CSalmo gairdneriJ swimbladder bo gas supersaturated water. Cannulas positioned in the swimbladder of fish were connected to a pressure transducer, facilitating direct measurement of swimbladder pressure. Fish held in supersaturated water showed an increase in swimbladder pressure. The response showed a strong dependence on the total gas pressure and the oxygen partial pressure of the water. The minimum level of gas supersaturation observed to cause this response was a ΔP of 27 mmHg CPO₂ = 160 mmHg). Swimbladder pressure increased until gas was forced out the pneumatic duct. The pneumatic duct release pressure is size dependent, with greater pressure required to expel swimbladder gas in smaller fish. The expansion of the swimbladder due to increased pressure causes a decrease in density. The buoyant force created by decreased density is greatest for fish below 10g. These fish seek depth to compensate for swimbladder overinflation.
|
Genre | |
Type | |
Language |
eng
|
Date Available |
2010-09-10
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
|
DOI |
10.14288/1.0097852
|
URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
|
Campus | |
Scholarly Level |
Graduate
|
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.