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Foraging	
  and	
  growth	
  poten/al	
  of	
  
juvenile	
  Chinook	
  salmon	
  following	
  /dal	
  
restora/on	
  of	
 ...
Acknowledgements	
  
Jesse	
  Barham	
  
Walker	
  Duval	
  
MaS	
  Holt	
  
Emiliano	
  Perez	
  
Lisa	
  Belleveau	
  
C...
Nisqually	
  River	
  Estuary,	
  Fall	
  2009	
  
Ques/on:	
  Do	
  restored	
  and	
  reference	
  marshes	
  provide	
  equivalent	
  
growth	
  opportuni/es	
  for	
  ju...
Fyke	
  trap	
  ne`ng	
  	
  
Diet	
  analysis	
  

Bioenerge/cs	
  model	
  
Consump/on	
  rate	
  study	
  

Temperature...
Bioenerge/cs	
  model	
  
Growth	
  =	
  Consump/on	
  –	
  (Metabolism	
  +	
  Wastes)	
  
Inputs:	
  
•  Consumer	
  mas...
Results:	
  Chinook	
  salmon	
  densi/es	
  
Results:	
  Diet	
  composi/on	
  
Results:	
  Diet	
  energy	
  density	
  
Results:	
  Stomach	
  fullness	
  
Results:	
  Temperatures	
  
Results:	
  2010	
  Growth	
  
Results:	
  2011	
  Growth	
  
Results:	
  2012	
  Growth	
  
Conclusions:	
  
•  Our	
  findings	
  are	
  generally	
  consistent	
  with	
  other	
  
studies	
  of	
  estuary	
  rest...
Es/ma/ng	
  Chinook	
  daily	
  consump/on	
  for	
  each	
  
sampling	
  event	
  
•  	
  	
  

Number	
  of	
  
hours	
 ...
Results:	
  Consump/on	
  study	
  
Foraging and growth poten/al of juvenile Chinook salmon following /dal restora/on of the Nisqually River delta.
Foraging and growth poten/al of juvenile Chinook salmon following /dal restora/on of the Nisqually River delta.
Foraging and growth poten/al of juvenile Chinook salmon following /dal restora/on of the Nisqually River delta.
Foraging and growth poten/al of juvenile Chinook salmon following /dal restora/on of the Nisqually River delta.
Foraging and growth poten/al of juvenile Chinook salmon following /dal restora/on of the Nisqually River delta.
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Foraging and growth poten/al of juvenile Chinook salmon following /dal restora/on of the Nisqually River delta.

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Presentation Given By: Aaron David, University of Washington

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Transcript of "Foraging and growth poten/al of juvenile Chinook salmon following /dal restora/on of the Nisqually River delta."

  1. 1. Foraging  and  growth  poten/al  of   juvenile  Chinook  salmon  following  /dal   restora/on  of  the  Nisqually  River  delta.   September  20,  2013   Aaron  David1,  Christopher  Ellings2,  Isa  Woo3,  Charles   Simenstad1,  Kelley  Turner3,  John  Takekawa3,     Ashley  Smith3,  and  Jean  Takekawa4   1University  of  Washington,  School  of  Aqua/c  and  Fishery  Sciences   2Nisqually  Indian  Tribe,  Department  of  Natural  Resources   3U.S.  Geological  Survey,  Western  Ecological  Research  Center   4U.S.  Fish  and  Wildlife  Service,  Nisqually  Na/onal  Wildlife  Refuge  
  2. 2. Acknowledgements   Jesse  Barham   Walker  Duval   MaS  Holt   Emiliano  Perez   Lisa  Belleveau   Caitlin  Guthrie   Jus/n  Hall   Ben  Ryken   Peter  Markos   Sam  Stepe/n   Kyle  Kautz   Eddie  Villegas   Tom  Friedrich   The  Wetland  Ecosystem  Team   And  many  others…   Cartography  by  Amy  Calahan   Funding:  US  EPA,  Nisqually  Tribe,  US  Fish  and  Wildlife  Service,  NSF  Graduate  Research  Fellowship   Program   Photo:  Michael  Grilliot  
  3. 3. Nisqually  River  Estuary,  Fall  2009  
  4. 4. Ques/on:  Do  restored  and  reference  marshes  provide  equivalent   growth  opportuni/es  for  juvenile  Chinook  salmon?   Growth  is  primarily  a  func/on  of:   -­‐  The  amount  of  prey  consumed   -­‐  The  energe/c  quality  of  prey  consumed   -­‐  The  temperature  regime  experienced  by  a  consumer   Tidal  channel  reconnected  in  2009   Unaltered,  reference  /dal  channel  
  5. 5. Fyke  trap  ne`ng     Diet  analysis   Bioenerge/cs  model   Consump/on  rate  study   Temperature  loggers  
  6. 6. Bioenerge/cs  model   Growth  =  Consump/on  –  (Metabolism  +  Wastes)   Inputs:   •  Consumer  mass     •  Consump/on  rate   •  Prey  energy  density   •  Consumer  energy  density   •  Temperature      
  7. 7. Results:  Chinook  salmon  densi/es  
  8. 8. Results:  Diet  composi/on  
  9. 9. Results:  Diet  energy  density  
  10. 10. Results:  Stomach  fullness  
  11. 11. Results:  Temperatures  
  12. 12. Results:  2010  Growth  
  13. 13. Results:  2011  Growth  
  14. 14. Results:  2012  Growth  
  15. 15. Conclusions:   •  Our  findings  are  generally  consistent  with  other   studies  of  estuary  restora/on  projects   •  The  reconnected  habitats  appear  to  provide   similar,  but  more  variable  opportuni/es  for   Chinook  growth   •  Increased  sensi/vity  to  air  temperatures  may   limit  the  growth  value  of  these  habitats  when   temperatures  are  warm   Photo:  Jean  Takekawa  
  16. 16. Es/ma/ng  Chinook  daily  consump/on  for  each   sampling  event   •      Number  of   hours  in  a  day   Gastric   evacua/on  rate   Mean  stomach   fullness  over  the   whole  day   Mean  stomach   fullness  at  the   beginning  and  end  of   the  24  hour  period  
  17. 17. Results:  Consump/on  study  
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