This proposal involves genetic analysis of tissue samples anticipated from the in-river commercial sockeye fishery on the Taku River in 2019. This activity was first supported by the Northern Fund in 2008 and makes use of the baseline samples collected with Northern Fund assistance from 2007-12.
This will identify the composition of the commercial harvest by stock groupings. In addition, when coupled with escapement counts from headwater counting fences (weirs), it will permit estimation of drainage-wide abundance for comparison with the mark-recapture estimate or other assessment methodology.
N19-I27 Taku River Sockeye Salmon Genetic Stock Identification Analysis of 2019 Commercial Samples Report
N16-I46 Taku Sockeye Genetic Stock Identification Report 2016
The goal of the project is to estimate the spawning escapement of the Fraser River – South Thompson age 0.3 aggregate (ST0.3A Chinook). The ST0.3A escapement will be estimated using Coded Wire Tags (CWT), Genetic Stock Identification (GSI), and CWT exploitation rate indicator stock data from escapement and Fraser River fisheries. To achieve this objective, we will increase recovery of CWTs from Chinook carcasses in the Lower Shuswap River; conduct a high-precision mark-recapture project and CWT sampling in the Middle Shuswap River; collect age samples across the South Thompson watershed; produce a CWT release group of Middle Shuswap River smolts (to augment the Lower Shuswap indicator stock); and analyze GSI and age data from the Albion Test Fishery.
N18-VHP16 Estimation of 2015 – 2018 Escapements of the South Thompson 0.3 Chinook Aggregate using a Bayesian Model that Combines Data on CWT Recoveries and GSI_Report Title Page
The Skeena River is host to the second largest aggregate of Chinook salmon in British Columbia. While the aggregate is a PSC escapement indicator stock, there are no biologically based escapement goals for this population. This project provides an annual escapement estimate for the aggregate as well as for the large component stocks. The estimate produced is comparable with the historic estimates produced using an estimate of variance. The Tyee Test fishery, which has been conducted since 1955, provides data such as age information that is matched to the genetic information. The combination of stock specific escapements with age composition forms the basis for escapement goals and benchmarks.
The Kitsumkalum River hosts one of the major Chinook populations in the Skeena watershed, and is a PSC exploitation rate indicator stock. The mark-recapture estimate produced in in a separate project forms the cornerstone for the expansions of the stock compositions observed at the Tyee Test fishery.
The project consists of genetic analyses of samples from Chinook salmon caught at the Tyee Test fishery, and escapement data from the Kitsumkalum mark-recapture program. Chinook salmon scale samples will be collected from the Tyee Test Fishery and the DNA from the samples will be compared against genetic baselines from Skeena Chinook salmon populations. The proportion identified as Kitsumkalum Chinook will be expanded to generate escapement estimates for the Skeena River aggregate using the mark-recapture estimate of escapement for the Kitsumkalum population.
N19-I34 Chinook Escapement Estimation to the Skeena River Using Genetic Techniques 2019
N18-VHP09 Chinook Escapement Estimation to the Skeena River using Genetic techniques Report 2018
N17-VHP13 Chinook Salmon Escapement Estimation to the Skeena River Using Genetic Techniques Report 2017
N16-I33 Chinook Salmon Escapement Estimation to the Skeena River Using Genetic Techniques 2016. Year 8
N15-I27 Chinook Salmon Escapement Estimation to the Skeena River Using Genetic Techniques 2015. Year 7
SSP14-09 Chinook Salmon Escapement Estimation to the Skeena River Using Genetic Techniques 2014. Year 6
SSP13-06 Chinook Salmon Escapement Estimation to the Skeena River Using Genetic Techniques 2013
SSP12-05 Chinook Salmon Escapement Estimation to the Skeena River using Genetic Techniques 2012. Year 4
SSP11-01 Chinook Salmon Escapement Estimation to the Skeena River Using Genetic Techniques 2011. Year 3
SSP10-01 Chinook Salmon Escapement Estimation to the Skeena River Using Genetic techniques 2010. Year 2
SSP-4 Chinook salmon Escapement Estimation to the Skeena River using Genetic techniques (Year 1)
Concern for West Coast Vancouver Island (WCVI) natural Chinook currently limits PSC fisheries in Southeast Alaska, the Haida Gwaii recreational fishery and particularly the Area F troll fishery in northern British Columbia and troll fisheries and some recreational fisheries on the WCVI. Although the Burman River is enhanced, the population is of sufficient size to estimate the escapement with precision, and thermally marked otolith sampling provides an estimate of the naturally spawned fraction.
The program will estimate the escapement of adult Chinook salmon to the Burman River, a PSC Chinook escapement indicator, using both closed population and open population mark-recapture techniques refined between 2009-2014. The project will also quantify age, sex and origin compositions. Estimates of abundance of the thermally marked hatchery fraction combined with a precise escapement estimate will provide important information to verify and support the WCVI Aggregate ratio estimation project by providing an independent reference point (the Burman River Chinook hatchery fraction, independent of Robertson Creek Hatchery stock) in the northern WCVI area.
S18-VHP11 Spawning escapements and origin of Chinook salmon at Burman River Report 2018
S17-VHP13 Burman River Chinook salmon mark-recapture 2017
S16-I17 Burman River Chinook Salmon Mark-Recapture Report 2016. Year 8
S15-I06 Burman River Chinook Salmon Escapement Indicator Mark-Recapture Experiment, 2015. Year 7
S14-I13 Burman River Open population mark-recapture estimation of ocean-type Chinook spawning escapements WCVI Report 2014
SSP13-01 Burman River Chinook Salmon Total Escapement Estimation Project, 2013
SSP12-01 Preliminary - Burman River Chinook Salmon Total Escapement Estimation Project, 2012
SSP11-06 Burman River Chinook Salmon Total Escapement Estimation Project, 2011
SSP10-03A Burman River Chinook Salmon Total Escapement Estimation Project, 2010
SSP-1A/B Burman River Chinook Salmon Total Escapement Estimation Project, 2009 (Year 1)