Slamgeesh Sockeye & Kokanee Interaction

It is generally assumed that the salmon species Oncorhynchus nerka exists in two forms, freshwater residents called ‘kokanee’ and an ocean-going form called ‘sockeye’, and that the two forms are separate and do not interbreed. However, if kokanee and ocean-going sockeye do sometimes interbreed, then current methods to estimate population size for management purposes will produce underestimates. The combined, larger population would be more resistant to environmental stresses from climate change and fishing. This project, led by the Gitksan Watershed Authorities, investigates the extent of kokanee-sockeye interbreeding at Slamgeesh Lake. The results will improve our ability to accurately monitor and assess the status of sockeye conservation units.

project objectives

Increase understanding of the interaction between sockeye and kokanee salmon in order to improve our ability to monitor and assess the status of sockeye conservation units.

project timeline

June 1, 2010
to April 30, 2011

project lead

Gitksan Watershed Authorities

subjects

life history, stock assessment

location

Slamgeesh Lake

related species

kokanee, sockeye