Reintroduction

Reintroduction of Sockeye Salmon into Skaha Lake

The migration of indigenous sockeye salmon has been terminated by the operation of McIntyre Dam, located on the Okanagan River between Osoyoos and Vaseux Lakes. Once an important food fishery, this dam has moved the historic Okanagan Nation fishing grounds at Okanagan Falls to a limited conservation fishery further downstream. Other management actions have also contributed to the depletion of these stocks. As an ONA priority to assist in maintaining and sustaining this struggling salmon stock, the ONA hosted a multi-agency workshop in 1997 to explore the potential to bring sockeye salmon into Okanagan Lake. Due to concerns of unknown interactions with an already struggling kokanee population in Okanagan Lake, agency experts agreed that the best course of action would be to proceed with a risk assessment to evaluate the experimental placement of sockeye salmon into Skaha Lake. The ONA and Colville Confederated Tribes, with project funding provided by the Bonneville Power Administration, have completed a three-year risk assessment from 2000-2003. During this time, members of the Canadian Okanagan Basin technical Working Group, fisheries agency staff, and other independent experts have provided annual technical review and assessment of project design, methodology, and results.

At the end of the three-year risk assessment in the spring of 2003, it was determined that with proper project design, reintroducing sockeye salmon into Skaha Lake posed little threat to resident fish stocks, and the COBTWG supported the ONA’s efforts to proceed with an experimental fry reintroduction program. With annual project monitoring, this method will yield significant information on the survival of kokanee and sockeye at various life history stages and on their interactions within Skaha Lake. The COBTWG has worked together to develop a comprehensive project Monitoring and Evaluation Plan that uses the best scientific procedures and protocols available. With approvals provided by the Federal-Provincial Introductions and Transfers Committee under the Federal Fisheries Act, the ONA is now moving forward with implementation planning.

In October 2003, the Okanagan Nation Alliance proceeded with a small Okanagan sockeye broodstock collection and egg take, raised the eggs in a hatchery, and released 352,500 sockeye fry into Skaha Lake. This marked a historic occasion, where, for the first time in over 50 years, sockeye salmon were able to occupy their historic habitat within Skaha Lake.