Difference between revisions of "Natal Origins Project (NO)"

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*There is a low probability for an individual fish to move large distances.
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*Abundance is a key factor: the more fish upstream in the Lees Ferry reach = more fish will move downstream
  
 
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*[http://gcdamp.com/index.php?title=Nutrients Nutrients Page]
 
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! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;">Projects</h2>
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! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;">Background</h2>
 
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 +
What we found:
 +
*Efficacy of Mechanical Removal
 +
*RBT abundance was high and variable, partially offset by trout immigration
 +
*BNT were more predaceous than RBT
 +
*RBT were more numerous than BNT
 +
*Predation risk is a function of both density & predatory behavior
 +
 +
Information Needs:
 +
*What controls trout abundance?
 +
*Where were RBT migrants originating from?
 +
*What controls trout abundance?
 +
*Where were RBT migrants originating from?
 +
*How many sub-adult HBC move into the mainstem?
 +
*How variable was subadult HBC survival?
 +
*Was there a relationship between HBC survival & RBT abundance?
  
 +
Outcomes:
 +
• Develop alternative sampling methods for determining trout and chub abundance and vital rates
 +
• Natal Origin Project: Movement and Trout dynamics
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• [http://gcdamp.com/index.php?title=Near_Shore_Ecology_(NSE)_Study NSE/JCM Projects]: Juvenile HBC survival and Regulating factors
  
 
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Revision as of 14:52, 26 April 2017
NatalOrigins.jpg
  • There is a low probability for an individual fish to move large distances.
  • Abundance is a key factor: the more fish upstream in the Lees Ferry reach = more fish will move downstream
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--
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Updates

ReachAbundances.jpg
[1]
EmigrationLargeRecruitmentEvents.jpg
[2]
EmigrationEnvironmentalStressor.jpg
[3]
NOconclusions.jpg
[4]

Links and Information

Background

What we found:

  • Efficacy of Mechanical Removal
  • RBT abundance was high and variable, partially offset by trout immigration
  • BNT were more predaceous than RBT
  • RBT were more numerous than BNT
  • Predation risk is a function of both density & predatory behavior

Information Needs:

  • What controls trout abundance?
  • Where were RBT migrants originating from?
  • What controls trout abundance?
  • Where were RBT migrants originating from?
  • How many sub-adult HBC move into the mainstem?
  • How variable was subadult HBC survival?
  • Was there a relationship between HBC survival & RBT abundance?

Outcomes: • Develop alternative sampling methods for determining trout and chub abundance and vital rates • Natal Origin Project: Movement and Trout dynamics • NSE/JCM Projects: Juvenile HBC survival and Regulating factors

Presentations and Papers

2017

2016

  • [Natal Origins of Rainbow Trout Project, Years 1-4 (Nov 11 – Dec 15)]

2015

2014

2013

Other Stuff
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