Westslope Cutthroat Trout Range

Westslope cutthroat trout Native range.

Westslope cutthroat trout range. This fish has been seriously reduced in its range by two primary factors. They are believed to have diverged from coastal cutthroat trout O. It is also one of two cutthroat trout subspecies that are native to Washington.

The requirement of cold clean water. The Westslope Cutthroat Trout is one of the most widely distributed cutt variants with pockets still surviving in Washington and Oregon and the main distribution covering a large swathe across the western slope of the Rockies in Idaho and Montana. Many of these fish are hybrids due to cross breeding with introduced rainbow trout.

This fish has been seriously reduced in its range by two primary factors. The cutthroat trout is native to the Rocky Mountain and coastal areas of the western United States US and is classified into as many as 14 subspecies. We no longer stock non-native fish in Banff but their genes live on in the DNA of wild fish.

The seven major based on distribution inland subspecies of cutthroat trout historically occupied most accessible cold water environments from Canada to southern New Mexico. Clarki about 18 to 08 million years ago Behnke 1992. These stream sections containing pure strain Westslope Cutthroat Trout range in length from a few hundred metre tributaries to 45 km of the upper Oldman River.

The Westslope Cutthroat Trout is native to southeastern British Columbia southwestern Alberta western Montana northern Idaho and small disjunct populations occur in parts of Washington Oregon. Once common in North America the westslope cutthroat is declining across its range. There are approximately 14 subspecies of cutthroat trout Lahontan Westslope Yellowstone identified in the world.

Hybridization with Rainbow andor Yellowstone Cutthroat Trout and habitat loss and degradation. The sum of the individual population estimates for these streams is approximately 40000 mature individuals Table 4. Salmon fry a staple food source for large anadromous species start to emerge from the gravel beds.