Spawning

Lower Duncan River Kokanee AUC Analysis 2014

The suggested citation for this analytic report is:

Thorley, J.L. and Hogan, P.M. (2015) Lower Duncan River Kokanee AUC Analysis 2014. URL: https://www.poissonconsulting.ca/f/423435381.

Background

Since 2008 aerial surveys have been conducted in the Lower Duncan River (LDR) to count the number of kokanee spawners. The primary objectives of the current analysis report are to:

  • Estimate the aerial observer efficiency based on ground counts.
  • Estimate the annual kokanee spawner abundance from the aerial counts.
  • Estimate the peak spawn timing.
Lower Columbia River Rainbow Trout Spawning Analysis 2014

The suggested citation for this analytic report is:

Thorley, J.L. (2015) Lower Columbia River Rainbow Trout Spawning Analysis 2014. A Poisson Consulting Analysis Report. URL: https://www.poissonconsulting.ca/f/1157179155.

Background

Each spring in the Lower Columbia River (LCR) below Hugh L. Keenleyside Dam (HLK) and in the Lower Kootenay River (LKR) below Brilliant Dam, thousands of Rainbow Trout spawn. Since 1992, BC Hydro has stabilized the spring discharge releases from HLK to protect Rainbow Trout redds from dewatering.

The primary goal of the current analysis to answer the following management question:

Does the implementation of Rainbow Trout Spawning Protection Flows over the course of the monitoring period lead to an increase in the relative abundance of Rainbow Trout spawning in the LCR downstream of HLK dam?

Lower Duncan River Kokanee AUC Analysis 2013

The suggested citation for this analytic report is:

Thorley, J.L. and Hogan, P.M. (2015) Lower Duncan River Kokanee AUC Analysis 2013. A Poisson Consulting Analysis Report. URL: https://www.poissonconsulting.ca/f/577555490.

Background

Since 2008 aerial surveys have been conducted in the Lower Duncan River (LDR) to count the number of kokanee spawners. The primary objectives of the current analysis report are to

  • Estimate the aerial observer efficiency based on ground counts
  • Estimate the annual kokanee spawner abundance from the aerial counts
  • Estimate the peak spawn timing