Fecundity

Duncan Lardeau Juvenile Rainbow Trout Abundance 2023

The suggested citation for this analytic report is:

Thorley, J.L., Andrusak, G.F. and Amies-Galonski, E. (2023) Duncan Lardeau Juvenile Rainbow Trout Abundance 2023. A Poisson Consulting Analytic Appendix. URL: https://www.poissonconsulting.ca/f/1491296951.

Background

Rainbow Trout rear in the Lardeau and Lower Duncan rivers. Since 2006 (with the exception of 2015) annual spring snorkel surveys have been conducted to estimate the abundance and distribution of age-1 Rainbow Trout. From 2006 to 2010 the surveys were conducted at fixed index sites. Since 2011 fish observations have been mapped to the river based on their spatial coordinates as recorded by GPS.

The primary aims of the current analyses were to:

  • Estimate the spring abundance of age-1 fish by year.
  • Estimate the egg deposition.
  • Estimate the stock-recruitment relationship between the egg deposition and the abundance of age-1 recruits the following spring.
  • Estimate the survival from age-1 to age-2.
  • Estimate the expected number of spawners without in river and/or in lake variation.
Duncan Lardeau Juvenile Rainbow Trout Abundance 2022

The suggested citation for this analytic report is:

Thorley, J.L., Andrusak, G.F. and Amies-Galonski, E. (2022) Duncan Lardeau Juvenile Rainbow Trout Abundance 2022. A Poisson Consulting Analytic Appendix. URL: https://www.poissonconsulting.ca/f/1424347820.

Background

Rainbow Trout rear in the Lardeau and Lower Duncan rivers. Since 2006 (with the exception of 2015) annual spring snorkel surveys have been conducted to estimate the abundance and distribution of age-1 Rainbow Trout. From 2006 to 2010 the surveys were conducted at fixed index sites. Since 2011 fish observations have been mapped to the river based on their spatial coordinates as recorded by GPS.

The primary aims of the current analyses were to:

  • Estimate the spring abundance of age-1 fish by year.
  • Estimate the egg deposition.
  • Estimate the stock-recruitment relationship between the egg deposition and the abundance of age-1 recruits the following spring.
  • Estimate the survival from age-1 to age-2.
  • Estimate the expected number of spawners without in river and/or in lake variation.
Duncan Lardeau Juvenile Rainbow Trout Abundance 2021

The suggested citation for this analytic report is:

Thorley, J.L., Andrusak, G.F. and Amies-Galonski, E. (2021) Duncan Lardeau Juvenile Rainbow Trout Abundance 2021. A Poisson Consulting Analytic Appendix. URL: https://www.poissonconsulting.ca/f/1275560691.

Background

Rainbow Trout rear in the Lardeau and Lower Duncan rivers. Since 2006 (with the exception of 2015) annual spring snorkel surveys have been conducted to estimate the abundance and distribution of age-1 Rainbow Trout. From 2006 to 2010 the surveys were conducted at fixed index sites. Since 2011 fish observations have been mapped to the river based on their spatial coordinates as recorded by GPS.

The primary aims of the current analyses were to:

  • Estimate the spring abundance of age-1 fish by year.
  • Estimate the egg deposition.
  • Estimate the stock-recruitment relationship between the egg deposition and the abundance of age-1 recruits the following spring.
  • Estimate the survival from age-1 to age-2.
  • Estimate the expected number of spawners without in river and/or in lake variation.
Duncan Lardeau Juvenile Rainbow Trout Abundance 2020

The suggested citation for this analytic report is:

Thorley, J.L., Andrusak, G.F. and Amies-Galonski, E. (2020) Duncan Lardeau Juvenile Rainbow Trout Abundance 2020. A Poisson Consulting Analytic Appendix. URL: https://www.poissonconsulting.ca/f/723287510.

Background

Rainbow Trout rear in the Lardeau and Lower Duncan rivers. Since 2006 (with the exception of 2015) annual spring snorkel surveys have been conducted to estimate the abundance and distribution of age-1 Rainbow Trout. From 2006 to 2010 the surveys were conducted at fixed index sites. Since 2011 fish observations have been mapped to the river based on their spatial coordinates as recorded by GPS.

The primary aims of the current analyses were to:

  • Estimate the spring abundance of age-1 fish by year.
  • Estimate the egg deposition.
  • Estimate the stock-recruitment relationship between the egg deposition and the abundance of age-1 recruits the following spring.
  • Estimate the survival from age-1 to age-2.
Duncan Lardeau Juvenile Rainbow Trout Abundance 2019b

The suggested citation for this analytic appendix is:

Thorley, J.L., Andrusak, G.F. and Amies-Galonski, E. (2019) Duncan Lardeau Juvenile Rainbow Trout Abundance 2019b. A Poisson Consulting Analytic Appendix. URL: https://www.poissonconsulting.ca/f/1245769249.

Background

Rainbow Trout rear in the Lardeau and Lower Duncan rivers. Since 2006 (with the exception of 2015) annual spring snorkel surveys have been conducted to estimate the abundance and distribution of age-1 Rainbow Trout. From 2006 to 2010 the surveys were conducted at fixed index sites. Since 2011 fish observations have been mapped to the river based on their spatial coordinates as recorded by GPS.

The primary aims of the current analyses were to:

  • Estimate the abundance of age-1 and age-2 fish by year.
  • Estimate the egg deposition.
  • Estimate the stock-recruitment relationship between the egg deposition and the abundance of age-1 recruits the following spring.
  • Estimate the survival from age-1 to age-2.
  • Estimate the expected number of spawners without in river and/or in lake variation.
Duncan Lardeau Juvenile Rainbow Trout Abundance 2018

The suggested citation for this analytic report is:

Thorley, J.L., Andrusak, G.F., and Dalgarno, S. (2018) Duncan Lardeau Juvenile Rainbow Trout Abundance 2018. A Poisson Consulting Analysis Report. URL: https://www.poissonconsulting.ca/f/679886444.

Background

Rainbow Trout rear in the Lardeau and Lower Duncan rivers. Since 2006 (with the exception of 2015) annual spring snorkel surveys have been conducted to estimate the abundance and distribution of age-1 Rainbow Trout. From 2006 to 2010 the surveys were conducted at fixed index sites. Since 2011 fish observations have been mapped to the river based on their spatial coordinates as recorded by GPS.

The primary aims of the current analyses were to:

  1. Estimate the spring abundance of age-1 fish by year.
  2. Estimate the egg deposition.
  3. Estimate the stock-recruitment relationship between the egg deposition and the abundance of age-1 recruits the following spring.
  4. Estimate a Limit Reference Point (LRP) for the egg deposition (and number of spawners).
  5. Estimate the maximum reproductive rate (spawners per spawner at low density).
  6. Rerun preliminary yield-per-recruit estimates based on the latest results.