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200729700 - Effect of Elevated Water Temperature and Gas Supersaturation on Bull Trout Reproduction and Growth

Sponsor: Abernathy Fish Tech. Center

Budgets: FY07: $138,396 | FY08: $157,998 | FY09: $158,158

Short description: This project seeks to determine the effect of sublethal stress on growth and reproduction of bull trout. This project will fill a data gap concerning the effect of environmental stress on bull trout performance and individual fitness.

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Final Council recommendation (Nov 2006)

Funding category: Expense

Recommended budgets: FY07: $0 | FY08: $0 | FY09: $0

Comment:

ISRP final recommendation: Not fundable

Comment:

The summary of the effects of elevated temperature and stress on the reproductive function in rainbow trout is very well done. The assumption that these stressors may have similar effects on the growth and reproductive capacity in bull trout may have merit, but first the proponents need to convince us that bull trout are having a significant problem with growth and reproductive capacity in the wild. Problems with reproduction in bull trout are currently not known to exist. We are convinced that this laboratory study will produce quality data and results, but how will those data be applied? This proposal will remain at a low priority for funding until elevated temperature or total dissolved gas effects on growth or reproductive capacity of bull trout are identified as potentially significant problems.

State/province recommendation: MS: Recommended Action

Review group: MSRT

Recommended budgets: FY07: (n/a) | FY08: (n/a) | FY09: (n/a)

Comment: The MSRT is not certain that a laboratory study to evaluate these survival parameters is appropriate. It is also not clear that results of this study would guide management action. This research project is grouped with other bull trout projects for context.