1 / 16

Taneum Creek Coho/NTT Interactions

Taneum Creek Coho/NTT Interactions. Gabriel Temple. Domestication. Objectives. Natural Production Is Taneum Creek a good place for Coho? Ecological Interactions How will trout respond to naturally produced coho?

zank
Download Presentation

Taneum Creek Coho/NTT Interactions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Taneum Creek Coho/NTT Interactions Gabriel Temple

  2. Domestication

  3. Objectives Natural Production • Is Taneum Creek a good place for Coho? Ecological Interactions • How will trout respond to naturally produced coho? • Will increased coho natural production have any negative effects on resident trout (growth or abundance) or will the nutrient benefits from stocking (carcasses) outweigh any potential negatives?

  4. Possible Outcomes • Combined biomass may increase with the addition of coho • Combined biomass may remain the same if coho biomass replaces trout biomass • Combined biomass may decrease if trout biomass is decreased as a result of coho introduction and coho are less efficient at utilizing resources

  5. Coho Stocking

  6. Annual Redd Distribution

  7. Natural Production

  8. PIT Tagged Smolts • Fall 2008- PIT tagged 1300 Taneum coho • Fall 2009- PIT tagged 1870 Taneum coho

  9. Ecological Interactions • Track changes in RBT abundance and biomass - BACI • Monitor growth of PIT tagged RBT in areas with and without coho production • Track changes in total combined biomass of salmonids - Ecological Efficiency • Determine utilization of carcass material

  10. Resident Trout Data - BACI Abundance Biomass

  11. Trout Instantaneous Growth

  12. Biomass

  13. Nutrient Benefit of Stocking

  14. Causation Theoretical – assume we found a significant increase in growth in the treatment sites

  15. Preliminary Results • No detectable change to NTT abundance, growth or biomass after 2 years of coho natural production. • Increase in combined biomass although RBT biomass has been decreasing in treatments relative to controls. • Will need several years of data to determine causation if an impact is determined.

  16. Acknowledgements • Bonneville Power Administration • Todd Newsome and crew • Tim Webster and crew • Anyone else I missed

More Related