The suggested citation for this analytic report is:
Hogan, P.M. and Thorley, J.L. (2015) Kootenay Lake Piscivorous Trout Inlake Abundance Estimation 2015. A Poisson Consulting Analysis Report. URL: https://www.poissonconsulting.ca/f/533988777.
With the recent decline in the number of Kokanee, there is an imperative to estimate the abundance of piscivorous Gerrard Rainbow Trout and Bull Trout in Kootenay Lake.
In this report we estimate the abundance of both species of trout by age- and size-class for 2011, because in this year:
The suggested citation for this analytic report is:
Thorley, J.L. & Andrusk, G.F. (2015) Kootenay Lake Gerrard Rainbow Trout Condition and Growth Analysis 2014. A Poisson Consulting Analysis Report. URL: https://www.poissonconsulting.ca/f/723490014.
The large, piscivorous Gerrard Rainbow Trout of Kootenay Lake support an important recreational fishery. Intermittently, since 1966, length, weight, fecundity and scale information has been collected from individual fish.
The primary questions the following analyses attempt to answer are:
What is the relationship between fork length and a) weight and b) fecundity?
How does body condition vary by year?
How does growth vary by year?
In addition the analysis asks
Are trends in growth and condition related to trends in kokanee abundance?
The suggested citation for this analytic report is:
Thorley, J.L. (2014) Kootenay Lake Exploitation Study 2013. A Poisson Consulting Analysis Report. URL: https://www.poissonconsulting.ca/f/1088509848.
The Kootenay Lake Exploitation Study is a multi-year fish tagging program to estimate the proportion of large rainbow and bull trout that are caught by anglers versus die of natural causes on Kootenay Lake.
The suggested citation for this analytic report is:
Thorley J.L. and Hogan P.M. (2014) Kootenay Lake Large Piscivorous Trout Hydroacoustic Analysis 2013. A Poisson Consulting Analysis Report. URL: https://www.poissonconsulting.ca/f/76712537.
Hierarchical Bayesian models were fitted to the hydroacoustic density data and acoustic tag depth detection for Kootenay Lake using using R version 3.0.2 (Team, 2013 ) and JAGS 3.3.0 (Plummer, 2012 ) which interfaced with each other via the jaggernaut (Thorley, 2014 ) R package. For additional information on hierarchical Bayesian modelling in the BUGS language, of which JAGS uses a dialect, the reader is referred to Kery and Schuab (2011) pages 41-44.
The hydroacoustic data was provided by the Ministry of Forest, Lands and Natural Resource Operations (MFLNRO) and the acoustic tag depth data by the Kootenay Lake Exploitation Study (Andrusak and Thorley, 2013 ).