Alouette Reservoir

Alouette Reservoir Kokanee Size-at-Age 2019

The suggested citation for this analytic appendix is:

Thorley, J.L. (2020) Alouette Reservoir Kokanee Size-at-Age 2019. A Poisson Consulting Analytic Appendix. URL: https://www.poissonconsulting.ca/f/1304398440.

Background

The Kokanee age structure population analysis (ALUMON #6) is a multi-year study to address potential impacts of reservoir operations on the reservoirs’ kokanee (Oncorhynchus nerka) population (Andrusak 2016).

The management question addressed in the current analysis is whether:

  1. The size-at-age of the kokanee population remains stable, or decreases with time once the standing crop has stabilized with the annual addition of fertilizer.
2020-01-21
Alouette Reservoir Kokanee Population Analysis 2015

The suggested citation for this analytic report is:

Thorley, J.L., Hogan, P.M., Irvine, R.L. and Campos, M. (2016) Alouette Reservoir Kokanee Population Analysis 2015. A Poisson Consulting Analysis Report. URL: https://www.poissonconsulting.ca/f/1819975990.

Background

The Kokanee Age Structure Population Analysis (ALUMON #6) is a multi-year study to address potential impacts of reservoir operations on the reservoirs’ kokanee (Oncorhynchus nerka) population (Andrusak 2014). As part of the Alouette Reservoir Water Use Plan (WUP), the study’s focus is to address whether the current kokanee population is recruitment limited and if any identified recruitment limitation is related to BC Hydro operations.

The management questions outlined in the WUP terms of reference were as follows:

  1. The size-at-age of the kokanee population remains stable, or decreases with time once the standing crop has stabilized with the annual addition of fertilizer.
  2. Drops in fry abundance, relative to estimates in previous years and to that predicted by estimates of mature kokanee, are uncorrelated with the extent of the reservoir fluctuations during the spawning and incubation period.
  3. Whether drops in fry abundance persist through time and cause an impact on the abundance of mature kokanee.
2016-03-17