Cutthroat Trout Life History

Bjornn and Reiser 1991.

Cutthroat trout life history. The rugged topography of their range has lead to isolation which in turn has given rise to fourteen recognized subspecies. Abstract The coastal cutthroat trout Oncorhynchus clarki clarki occurs along the Pacific coast of North America from Humboldt Bay California to Prince William Sound Alaska in a zone that closely overlaps the coastal rain forest belt. Westslope cutthroat trout have three possible life history strategies.

They are renowned for their complex life history that includes resident river migrant lake migrant and marine migrant forms. We use the most recent data from these primary sources. 01022020 Westslope Cutthroat Trout are known to exhibit multiple life history strategies in a single watershed Bjornn and Mallet 1964.

Moreover sampling at this time could disrupt spawning behavior and reduce spawning success. The most diverse trout species in North America the historical distribution of cutthroat trout covers the broadest range of any stream dwelling trout in the Western Hemisphere. Their criteria for spawning are thought to be quite specific and require a narrow range of substrate and hydrologic con-ditions Hickman and Raleigh 1982.

Migratory cutthroat trout live in lakes reservoirs riv-ers or the ocean and return to tributary streams to spawn. Otherwise their life history characteristics are much like those of the anadromous form. Yellowstone cutthroat trout were among the wonders encountered by the Lewis and Clark Corps of Discovery Expedition.

Although the DFA did not assign WCT with 100 accuracy patterns in life history structure at multiple spatial scales emerged and WCT in the St. Anadromous coastal cutthroat trout sometimes referred to as sea-runs can be found in the estuaries and lagoon systems of northern California. Maries River basin.

These strategies include adfluvial migrates to lakes fluvial migrates to rivers or resident stays in streams. Early explorers and visitors to Montana enjoyed exceptional fishing. The current world record is a 41-pounder landed in 1925.