Here's a general overview:
Commonly encountered sizes:
* Rainbow Trout: Typically grow to 12-18 inches in length and 1-3 pounds in weight. Some can reach over 30 inches and 10 pounds in optimal conditions.
* Brown Trout: Can grow up to 24 inches long and 8 pounds in weight. Larger individuals exceeding 30 inches and 15 pounds have been recorded.
* Brook Trout: Usually grow to 10-12 inches in length and 0.5-1 pound in weight. Larger fish reaching 18 inches and 3 pounds are possible.
* Cutthroat Trout: Can reach lengths of 20-24 inches and weights of 3-5 pounds. Some individuals can exceed 30 inches and 10 pounds.
Record sizes:
* Rainbow Trout: World record is 48 pounds 2 ounces, caught in Lake Crowley, California.
* Brown Trout: World record is 51 pounds 12 ounces, caught in the Snake River, Idaho.
* Brook Trout: World record is 14 pounds 8 ounces, caught in Maine.
* Cutthroat Trout: World record is 31 pounds 12 ounces, caught in the Yellowstone River, Wyoming.
Factors influencing size:
* Species: Different trout species have varying growth rates and maximum sizes.
* Water temperature: Trout thrive in cool, oxygen-rich waters.
* Food availability: Abundant food sources allow for faster growth.
* Genetics: Some individuals have naturally faster growth rates.
* Age: Trout continue to grow throughout their lives, although the rate slows down as they mature.
* Habitat: The availability of suitable habitat, such as deep pools and ample cover, influences size.
It's important to note that these are just general guidelines. The size of trout can vary greatly depending on specific circumstances.