Category: 2006

Burman River Chinook Salmon Mark-Recapture

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)

 

 

Kitwanga River Sockeye Enumeration

The Kitwanga River is a biologically rich tributary of the Skeena River that produces a significant portion of the overall Skeena salmon that return each year. Kitwanga River sockeye are of significant importance because they are genetically unique, and Gitanyow Lake, in the Kitwanga watershed, is one of the ten largest sockeye producing lakes in the Skeena Watershed. Kitwanga sockeye are also considered a conservation unit as defined in Canada’s Wild Salmon Policy. Historically, Kitwanga sockeye numbered in the tens of thousands, but due to drastic declines in abundance, Kitwanga sockeye are no longer directly fished commercially or harvested for Food, Social and Ceremonial purposes.
The enumeration of Kitwanga sockeye has been ongoing since 2000, first through the operation of a temporary fence in the upper part of the watershed, and then through the operation of the Kitwanga River Salmon Enumeration Facility (KSEF) located near the mouth of the Kitwanga River. The KSEF has been in operation for the last 12 years and has proven to be an extremely important in-season/post-season fisheries management tool. Despite this, no long-term funding has been secured to operate the KSEF on a yearly basis. In the past few years, the cost to operate the facility has been variously shared by the Gitanyow Fisheries Authority, Fisheries and Oceans Canada, Pacific Salmon Commission, Pacific Salmon Foundation and Skeena Wild Conservation Trust.

N19-I41 Kitwanga River Salmon Enumeration Facility (KSEF) – 2019 Report

N18-I31 Kitwanga River Salmon Enumeration Report 2018

N17-I28 Kitwanga River Salmon Enumeration Report 2017

N16-I40 Kitwanga River Salmon Enumeration Report 2016

N15-I36 Kitwanga River Salmon Enumeration, 2015

N14-I25 Kitwanga River Salmon Enumeration, 2014

N08-I17 Kitwanga River Sockeye Salmon Enumeration, 2008

N07-I18 Kitwanga River Sockeye Salmon Enumeration, 2007

N06-I39 Kitwanga River Sockeye Salmon Enumeration, 2006

N05-I01 Kitwanga River Sockeye Salmon Enumeration 2005

NP11 Kitwanga sockeye enumeration, 2004

 

 

Northern Boundary Area Sockeye Salmon Genetic Stock Identification

Provisions of the Pacific Salmon Treaty specify harvest sharing arrangements of Nass and Skeena River sockeye salmon returns for the U.S. and Canada. The United States is allowed to harvest a fixed percentage of the Annual Allowable Harvest of Nass and Skeena sockeye stocks in Alaska’s District 101 gillnet and District 104 purse seine fisheries. Accurate estimates of the stock-specific catch in commercial fisheries of each nation are required to estimate the total return of these stocks and the percentage of each stock caught in treaty-limited fisheries. Annual catches over or under the agreed percentage are made up for in subsequent years.

Until recently, the Alaska Department of Fish and Game (ADF&G) used scale pattern analysis successfully to estimate contributions of Nass, Skeena and Southeast Alaska sockeye stocks to fisheries in southern Southeast Alaska. Since  2006, the Auke Bay Laboratories has used genetic analysis for the Northern Boundary sockeye fisheries. Results from comparisons between stock composition using scales and genetic analysis show both methods provide accurate estimates of stock composition, although DNA analysis is able to discriminate stocks at a finer resolution than scales. An additional advantage of the DNA technique is that it does not require annual sampling to re-establish the escapement baseline.

The purpose of this project is to continue the genetic stock identification of the commercial sockeye catch in ADF&G District 101 gillnet fishery and District 104 seine fishery using the baselines developed by the ADF&G.

N18-I10 Northern Boundary Area Sockeye Genetic Stock Identification Report 2018

N17-I09 Northern Boundary Area Sockeye Genetic Stock Identification Report 2017

N16-I02 Northern Boundary Area Sockeye Genetic Stock Identification Report 2016

N15-I02 Northern Boundary Area Sockeye Salmon Genetic Stock Identification for 2015. Year 9 of 17

N14-I02 Northern Boundary Area Sockeye Salmon Genetic Stock Identification for 2014. Year 8

N13-I02 Northern Boundary Area Sockeye Salmon Genetic Stock Identification for 2013. Year 7

N12-I07 Northern Boundary Area Sockeye Salmon Stock Identification for 2012. Year 6

N11-I04 Northern Boundary Area Sockeye Genetic Stock Identification. Year 5

N10-I11 Northern Boundary Area Sockeye Salmon Genetic Stock Identification. Year 3

N08-I30 Northern Boundary Area Sockeye Genetic Stock Identification. Year 3

N07-I19 Northern Boundary Area Sockeye Genetic Stock Identification. Year 2.

N06-I12A Northern Boundary Area Sockeye Salmon Genetic Stock Identification

N06-I12B Northern Boundary Area Sockeye Salmon Genetic Stock Identification (ADFG)

Alsek Sockeye Run Reconstruction

Weir counts have been made on the Klukshu River, part of the Alsek River system, by the Department of Fisheries and Oceans (DFO) in co-operation with the Champagne-Aishihik First Nation, since 1976. A mark-and-recapture program ran from 2000 to 2004, and in 2005 and 2006, the Alsek sockeye population was estimated using tissue sample and catch information from the commercial sockeye fishery in Dry Bay as well as the weir counts. By recommendation by the Northern Fund Committee in 2008, a statistically valid sampling strategy that would provide the foundation for reconstructing sockeye and Chinook returns to the Alsek River was completed. Based on this model, it was proposed that funding be provided to analyze sockeye tissue samples collected in the commercial sockeye fishery in Dry Bay (up to 750 per season), to reconstruct the Alsek sockeye runs as described in Gazey’s analysis. The program has been running successfully each season since 2012.

N17-I16 Alsek Sockeye Run Reconstruction 2017

N16-I49 Alsek Sockeye Run Reconstruction Using GSI 2016

N15-I11 Alsek Sockeye Run Reconstruction 2015. Year 4

N14-I10 Alsek Sockeye Run Reconstruction 2014

N13-I12 Alsek Sockeye Run Reconstruction 2013

N12-I17 Alsek Sockeye Run Reconstruction, 2012

 

 

Skeena lakes juvenile sockeye hydroacoustic surveys

We propose to use hydroacoustic methodology combined with trawl and gillnet sampling to estimate the limnetic fish species composition in six Skeena River and Nass River watersheds lakes and to estimate the population and rearing densities of age-0 sockeye fry and competitor limnetic species at each surveyed lake. The sockeye trawl and gillnet samples will also provide age and size data for the juvenile sockeye population at each lake. For 2020, we propose to survey Azuklotz, Bear, Damdochax, Lakelse, McDonell, and Wiiminosik lakes.

Sockeye originating from the selected lakes are harvested in both Canadian and American fisheries, and thus relevant to the Pacific Salmon Treaty. Hydroacoustic surveys are a cost effective method for assessing the status of sockeye stocks. Adult escapements for many BC north coast sockeye lakes are currently not determined due to high costs from the remoteness of the lake or due to other factors such as poor visibility for assessing lake spawners. The hydroacoustic methodology allows for a quick and accurate assessment of the stock status of each surveyed lake. For lakes where reliable estimates of adult escapement are available, hydroacoustic fry surveys are useful for quantifying spawner-to-fry productivity. Finally, the estimates of age-0 sockeye fry population can be compared to the lake carrying capacity for each lake.

N19-I43 Skeena Sockeye Lakes Hydroacoustic Surveys 2019 Report

N18-I34 Skeena Sockeye Lakes Hydroacoustic Surveys Report 2018

N17-I32 Skeena Sockeye Lakes hydroacoustic surveys 2017

N16-I09 Skeena Sockeye Lakes Hydroacoustic Surveys Report Year 4 0f 5

N15-I16 2015 Skeena Sockeye Lakes Hydroacoustic Surveys. Year 3 of 5

N14-I14 Skeena Sockeye Lakes Juvenile Sockeye Hydroacoustic Surveys. Year 2 of 5

N13-I20 Skeena Sockeye Lakes Juvenile Sockeye Hydroacoustic Surveys. Year 1 of 5

 

Taku River Coho Salmon Escapement and Smolt Tagging Augmentation

Coho salmon returning to the Taku River pass through an offshore troll fishery before entering inside waters where they encounter seine, drift gillnet, and recreational fisheries. After entering the river, the remaining coho salmon encounter drift/set gillnet fisheries in Canada. Such a resource is worthy of a stock assessment program that directly estimates production parameters such as harvest, escapement, exploitation rate, smolt production, survival rates and brood year production. This project will provide annual estimates of escapement necessary to refine escapement goals and forecast runs. Improved escapement goals and run forecasts along with inseason abundance estimates allow implementation of abundance-based management. These combined efforts in-river along with adult sampling programs in the various marine fisheries allow detailed stock assessment analyses.

2019 N15-I05A Taku River Coho Salmon Smolt Tagging Augmentation 2019 Report

2018 - N15-I04B Taku River Coho Adult Augmentation Report

2018 - N15-I05A Taku River Coho Salmon Smolt Tagging Augmentation Report

N17-I21A Taku River Coho Adult Augmentation - Final

N17-I22 Taku River Coho Smolt Tagging Augmentation - Final

N16-I44B Taku River Coho Salmon Escapement and Adult Augmentation Report. Year 10

N16-I45B Taku River Coho Salmon Smolt Tagging Augmentation Report. Year 10

N15-I04A Taku River Coho Salmon Adult Tagging Augmentation. Year 9 (DFO Component)

N15-I04B Taku River Coho Adult Augmentation 2015-2017. Years 9-11 (ADFG Component)

N15-I05B Taku River Coho Salmon Smolt Tagging Augmentation. Year 9 (DFO Component)

N14-I04 Taku River Coho Salmon Escapement and Smolt Tagging Augmentation. Year 8

N13-I04 Taku River Coho Salmon Escapement and Smolt Tagging Augmentation. Year 7

N12-I09 Taku River Coho Salmon Escapement and Smolt Tagging Augmentation, 2012. Year 6

N11-I09A Taku River Coho Salmon Escapement and Smolt Tagging Augmentation (ADFG Component), 2011

N11-I09B Taku River Coho Salmon Escapement and Smolt Tagging Augmentation (DFO Component)

N10-I15 Taku River Coho Salmon Escapement and Smolt Tagging Augmentation (DFO Component)

N06-I08A Taku River Coho Salmon Escapement and Smolt Tagging Augmentation

N06-I08B Taku River Coho Salmon Escapement and Smolt Tagging Augmentation

Stikine River Coded Wire Tagging of Chinook and Coho Salmon Smolts

Funding of this proposal will augment the existing joint Canada and US coded wire tagging programme and serve to provide the resources to meet the Stikine River chinook and coho salmon smolts tagging objectives. The data derived will be used to determine the distribution, run timing, marine survival, and magnitude of marine catches of adult Stikine River chinook salmon, and distribution and run timing adult Stikine River coho salmon. This project is directly linked to the requirement in Annex IV, Chapter 1, paragraph 3(a)(2&3) of the PST to develop and implement abundance-based management regimes for Stikine chinook and coho salmon.

N19-I18 Stikine River Coded Wire Tagging 2019 Report

N18-VHP04 Stikine Coded Wire Tagging Report 2018

N17-VHP09 Stikine River Coded Wire Tagging Augmentation 2017. Year 10

N16-I03 Stikine River Coded Wire Tag Augmentation 2016. Year 9

N15-I03 Stikine River Coded Wire Tag Augmentation, 2015. Year 8

N14-I03 Stikine River Coded Wire Tag Augmentation, 2014. Year 7

N13-I03 Stikine River Coded Wire Tag Augmentation, 2013. Year 6

N12-I03 Stikine River CWT Augmentation, 2012

N11-I07 Stikine River CWT Augmentation 2011

N10-I05 Stikine River CWT Augmentation 2010

N08-I37 Stikine River CWT Augmentation 2008

N07-I15 Stikine River CWT Augmentation 2007

N06-I16 Stikine River CWT Augmentation 2006

Cowichan River – Stoltz Bluff Sediment Remediation

Stoltz Bluff is a deposit of glacial sediment that extends for approximately 600 m at the outside of a natural meander bend on the Cowichan River, 27 km upstream of Cowichan Bay. Stoltz Bluff was previously identified as the largest point source of fine sediment on the river, representing on average 35-45% of the river’s annual total suspended sediment (TSS) load (KWL Assoc. Ltd. 2005). This is significant in that effective sediment management was identified as the second highest fish habitat restoration priority in the Cowichan Recovery Plan, prepared for Cowichan Tribes’ Treaty Office (LGL Ltd. 2005).
The primary objective of a potential Stoltz Bluff remediation project evolved over 25 years to become “the effective control of massive sediment transport from the bluff (i.e., 10,000-28,000 m3/year since 1993) (KWL Associates Ltd. 2005)), that had been negatively affecting Cowichan River fish habitats and stocks for many kilometres downstream (Burt and Ellis 2006).” The recent Cowichan River Watershed Health and Chinook Initiative (Ayers 2017) reemphasized the value of improved year-round water quality and salmonid spawning habitat as an ongoing strategic management objective.

Beginning in July 2006, the BC Conservation Foundation (BCCF) coordinated a major sediment remediation project at Stoltz Bluff. Work included construction of an engineered 600 m rip-rap berm and terrace, complete with a series of weirs, channel gradient controls and bioengineering treatments designed to move river flows away from the base of the bluff and prevent further bank erosion and major slope failures.

The initial phase of the project took 10 weeks to build, and was supported by a group of seven partners who contributed $830K in funds and in-kind construction materials (including $250K from PSC). For 10 years following the project’s inception, there was a significant improvement in the river’s water quality (i.e., TSS and turbidity) and downstream fish habitats (Gaboury et al. 2012), which is thought to have contributed to incremental gains in annual returns of the river’s fall Chinook and chum salmon stocks, as well as winter steelhead.

However, since 2014, there has been a notable (and even dramatic) change in slope stability at Stoltz Bluff, apparently prompted by the cyclical return of wetter winter weather conditions (McQuarrie 2017). Mass wasting events in the Bluff’s gullies and numerous smaller slope failures have collectively overwhelmed existing sediment retention infrastructure, resulting in higher sediment loads entering the Cowichan River. If this is not effectively mitigated in subsequent annual maintenance activities, a decade of improved spawning conditions will likely become incrementally reversed.

S11-H03 Cowichan River – Stoltz Bluff Remediation Monitoring (Year 4 of 4)

S10-H04 Cowichan River – Stoltz Bluff Remediation Monitoring. Year 3

S07-H05 Cowichan River – Stoltz Bluff Remediation (Year 2)