In this project we propose to tag Harrison sockeye upon entry into the Harrison River across the entire migration period, from late July through to mid-October (the beginning of spawning ground assessments), to accurately estimate premature mortality and quantify mortality in relation to river entry timing for this system. This project will reduce the uncertainty in the relationship between Harrison sockeye migration timing past Mission and survival to spawning.
S14-I06 Estimating Premature Mortality of Harrison River Sockeye Salmon
The purpose of this project was to develop training and replace out-dated hand-held electronic CWT detection equipment for recovery of CWTs from DFO Coho escapement programs with the new Northwest Marine Technology Inc. T-wand to increase accuracy in sampling of CWTs. Deployment of this new equipment advances the management of Coho fisheries, allowing for increased confidence in Interior Fraser Coho escapement estimates and run timing which may allow for increased exploitation on other Pacific Salmon stocks.
S14-I14 Coho CWT Sampling Hand-held Equipment Replacement. Year 1
It is becoming increasingly apparent that we need to take into consideration the ocean conditions that salmon encounter during their marine life to establish effective management and conservation strategies for Pacific salmon stocks. Our goal is to examine early marine growth as a mechanism controlling marine survival of Fraser sockeye salmon. By developing leading indicators of salmon survival that consider short-term changes in ocean conditions and incorporating these indicators into the annual assessment of Fraser sockeye salmon, such as the current forecasting models used by DFO Fisheries Management, this project is designed to provide improved information for the management of Fraser sockeye salmon stocks.
In year 1, we carried a pilot project and found that early marine growth (daily increment measured from otoliths) and somatic growth (change in length at sea entry and time of capture) of juvenile sockeye caught at sea was significantly higher in 2008 compared to the ocean entry year 2007, which is consistent with the hypothesis that higher early marine growth leads to higher smolt survival.
In year 2, we are expanding our analysis of early marine growth of Chilko Lake sockeye salmon to include additional years for which otoliths of juveniles Chilko Lake sockeye are available. The importance of early marine growth, number and size of smolts going to sea on the number of adult sockeye salmon returning to Chilko Lake will be assessed using linear and non-linear models. In keeping the budget of Yr-2 at the same level as the pilot (Yr-1), the analysis of sockeye stock other than Chilko Lake sockeye salmon and the assessment of the importance of the various oceanic factors on early marine growth was relegated to YR-3 (see Approach section for details).
In year 3, we are proposing to expand our analyses to two CUs: Shuswap and Harrison River sockeye salmon. Shuswap sockeye salmon is used to assess if Chilko Lake sockeye salmon an indicator stock is representative of other lake type sockeye salmon populations.
S16-I01 Effects of Early Marine Growth on Adult Fraser Sockeye Salmon Returns Report 2016. Year 3
S15-I05 Effects of early marine growth on adult Fraser sockeye salmon returns. Year 2
S14-I19 Effects of Early Marine Growth on Adult Fraser Sockeye Salmon Returns. Year 1
This project targets Fraser River sockeye and other sockeye stocks that migrate to the ocean via Discovery Passage (e.g., Sakinaw Lake sockeye). One of the main benefits of this project will be comparison of stock proportions among out-migrating juveniles versus the relative abundance of stocks in the adult return. The final report will provide conclusions on the ability of low-cost juvenile sampling in marine corridors to contribute to in-season advice for the management of sockeye fisheries in subsequent years.
Over the past 20 years there has been high variability in the survival of Fraser River sockeye salmon both within and between run cycles with the greatest variability occurring over the past decade. It is generally accepted that there is significant mortality during the first few weeks that juvenile salmon are in the ocean. This project supports a trawl survey in early June during peak abundance of juvenile sockeye salmon in the Strait of Georgia to estimate the abundance of juveniles entering the Strait and provides information on variability in residence timing and migration patterns. DNA analysis will be used to determine CU specific abundance levels, distribution patterns and growth rates.
S14-I11 Early marine residence timing and survival of Fraser River sockeye in Strait of Georgia 2014
S13-I08 Preliminary Report Early marine residence timing and survival of Fraser River sockeye in Strait of Georgia 2013
This project will collect and analyse DNA information from chinook in the WCVI chinook AABM fishery. The information is required to address i) changes in the conduct and catch distribution of the WCVI chinook fishery, including a more distributed troll fishery and growth of the sport fishery relative to the base period; and ii) the impact of these changes on the reliability of the CTC chinook model to forecast abundance.
S15-I15 Collection of DNA Based Stock Composition Data from the WCVI Chinook Troll Fishery. Year 10
S14-I04 Collection of DNA Based Stock Composition Data from the WCVI Chinook Troll Fishery. Year 9
S13-I12 Collection of DNA Based Stock Composition Data from the WCVI Chinook Troll Fishery. Year 8
S12-I11 Collection of DNA Based Stock Composition Data from the WCVI Chinook Troll Fishery. Year 7
S11-I10 Collection of DNA Based Stock Composition Data from the WCVI Chinook Troll Fishery. Year 6
S10-I13 Collection of DNA Based Stock Composition Data from the WCVI Chinook Troll Fishery. Year 5
S08-I29 Collection of DNA Based Stock Composition Data – WCVI Chinook Troll Fishery. 2008
S07-I08 Collection and Analysis of DNA Based Stock Composition Data – WCVI Chinook Troll Fishery
In order to facilitate management responses to Southern Chum stock strength, in accordance with Annex IV, Chapter 6 of the Pacific Salmon Treaty it is necessary to provide the catch composition in fisheries targeting Southern origin Chum populations. We are proposing to sample Southern BC and US mixed stock Chum fisheries to determine stock composition to the Canadian Conservation Unit (CU) and United States Management Unit (MU) level using genetic mixed stock analysis. In addition, run timing, distribution and diversion by CU and MU will be explored for run reconstruction.
S15-I02A Southern British Columbia Chum Salmon Mixed Stock Identification. Year 4 of 4 (DFO Component)
S15-I02B Southern British Columbia Chum Salmon Mixed Stock Identification. Year 4 of 4 (Suquamish Component)
S13-I03A Joint US and CA Mixed-stock Chum Fisheries Sampling Design and Analysis 2013-2014
S12-I12A Southern British Columbia Chum Salmon Mixed Stock Identification (DFO Component). Year 1
The identification of benchmarks to establish the status of Canadian Management Units (MU’s) has been identified as a key priority of the bilateral Coho Technical Committee. LGL proposes to continue the application of the Coho Habitat Production methodology developed by Bocking and Peacock (2004) to the Lower Fraser Coho MU to develop benchmarks of status for this MU and the component Canadian Wild Salmon Policy Conservation Units (CU’s).
S14-I01 Determining Optimum Coho Smolt Production and Spawner Abundance to Establish Benchmarks for Coho Salmon Conservation Units (CU) in the Lower Fraser Management Unit 2014. Year 2
S13-I05 Determining Optimum Coho Smolt Production and Spawner Abundance to Establish Benchmarks for Coho Salmon Conservation Units (CU) in the Strait of Georgia Mainland, and Vancouver Island Management Units 2013
The overall goal of the project aims at breaching the man-made causeway and building a bridge across the breach. The bridge is being built at a site where there used to be a trestle bridge supporting the railroad leading to the Westcan Terminal. The trestle bridge had been removed in the 1960’s and the gap closed by infilling. The in-filling and creation of a solid road connecting the Cowichan Bay Road with the Westcan dock effectively cut the estuary into two sections after the removal of the former trestle bridge. Furthermore, the dyke blocked off the flow of the main stem of the Cowichan River South Fork which used to drain into the southern section of the estuary when the trestle bridge was still in place, preventing proper estuarine ecosystem functioning and salmon smolt from accessing prime habitat located to the south of the Westcan Terminal.
S14-H04 Breaching the Westcan Causeway in Cowichan Bay to Re-connect the Two Parts of the Estuary Artificially Divided by the Westcan Causeway
Current methodology for estimating escapement and run size of Nass Area Chum salmon relies on a number of untested assumptions, resulting in considerable uncertainty regarding stock status. We propose a detailed review of recent and historical escapement data for Nass Area Chum salmon stocks, combined with strategically targeted escapement surveys, to refine and standardize the methodology used to calculate Nass Area Chum salmon escapement and run size.