Kluane National Park and Reserve has the only naturally occurring population of kokanee salmon (Oncorhynchus nerka) in the Canadian national park system. In 2002, the population experienced a significant decline that resulted in extremely low numbers for well over a decade. The reason for the decline remains unknown and continued monitoring is necessary to shed light on possible causes. Spawning Kokanee salmon have been counted since 1976. The survey is performed annually with a combination of visual survey methods: creek walks, helicopter flights and canoeing