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UBC Theses and Dissertations
Effect of a parasitic nematode, Truttaedacnitis truttae on growth and swimming ability of rainbow trout Russell, L. Robert
Abstract
Growth efficiencies and swimming abilities of fingerling and 1 1/2 year old rainbow trout infected with the nematode parasite Truttaedacnitis truttae are examined. Control trout and trout infected in the laboratory with 5, 10, 20, 40, or 80 worms exhibited similar growth characteristics within each of four experimental groups fed different rations of trout chow (1%, 2%, 3%, or 4% of wet body weight fed per day). Slightly decreasing growth rates were correlated with increasing numbers of nematode parasites. Differences between growth rates, amounts of food consumed and growth efficiencies of infected and non-infected fish were not statistically significant. Critical swimming speed, fixed velocity and burst velocity stamina tests revealed similar swimming abilities in both control and infected trout. Maximum swimming speeds attained and time to fatigue at cruising speeds were more closely related to fish size and rations fish were fed than to numbers of worms with which fish were infected. Importance to rainbow trout survival of large natural infections with T. nruttae is discussed.
Item Metadata
Title |
Effect of a parasitic nematode, Truttaedacnitis truttae on growth and swimming ability of rainbow trout
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1977
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Description |
Growth efficiencies and swimming abilities of fingerling and 1 1/2 year old rainbow trout infected with the nematode parasite Truttaedacnitis truttae are examined. Control trout and trout infected in the laboratory with 5, 10, 20, 40, or 80 worms exhibited similar growth characteristics within each of four experimental groups fed different rations of trout chow (1%, 2%, 3%, or 4% of wet body weight fed per day). Slightly decreasing growth rates were correlated with increasing numbers of nematode parasites. Differences between growth rates, amounts of food consumed and growth efficiencies of infected and non-infected fish were not statistically significant. Critical swimming speed, fixed velocity and burst velocity stamina tests revealed similar swimming abilities in both control and infected trout. Maximum swimming speeds attained and time to fatigue at cruising speeds were more closely related to fish size and rations fish were fed than to numbers of worms with which fish were infected. Importance to rainbow trout survival of large natural infections with T. nruttae is discussed.
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Genre | |
Type | |
Language |
eng
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Date Available |
2010-02-19
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Provider |
Vancouver : University of British Columbia Library
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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.
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DOI |
10.14288/1.0094134
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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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.