Kype and/or characteristics that could be of importance in inter- and intra-sexual evaluations of individual quality. The size of the kype is believed to determine male spawning frequency. The extinct sabertooth salmon, "Oncorhynchus rastrosus", was first named for its prominent premaxillary dentition. It possesses an enormous conical tooth on each premaxilla. There is no visible kype on the dentary, implying a different strategy for forming mate dominance. Kype A kype is a hook-like secondary sex characteristic which develops at the distal tip of the lower jaw in some male salmonids prior to the spawning season. The structure usually develops in the
Kokanee salmon spawning in April. The female kokanee creates a nest called a redd. She will lay around 1000 eggs, depending on food availability. Eggs hatch within 110 days, and the juveniles swim out to the lake. During spawning, the males turn bright red and develop a humped back and an elongated jaw similar to the male Sockeye salmon. Females also dawn a dark red hue during the breeding season, which also corresponds with the breeding season of Sockeye salmon. Competition with introduced lake trout can lead to a decline in Kokanee populations during the summer. Lake trout are predatory and will