Smallmouth Bass
One of the most common types of fish that fishermen relish in challenging is the bass. According to Dorothy Philpott of The Bass Resource, whether you are fishing for smallmouth or largemouth bass, you want to choose a line that is slow moving but at the same time has enough weight to reach the bass as they drift in slow-moving winter waters. She suggests using an 8- or 10-pound test line for shallow water and a 12- or 15-pound test line for deeper waters.
Largemouth Bass
Todd Vinyard of the Angler Guide states that when he is out on winter days fishing for largemouth bass, he prefers to use a 10- or 12-pound test line. This allows enough weight to carry the line where he wants it without it drifting too far from his target. Also, this heavier weight line is sturdier for larger big-mouthed bass, which may be heavier than the lighter and possibly smaller small-mouthed bass. He agrees with Philpott that deeper waters require a heavier line and shallow waters require a lighter line.
Trout
Trout are fish that prefer cold water mountain streams. Dave Finkelstein of the Fishing Network suggests that using finesse fishing techniques will make it easier and more rewarding for you as you enjoy the mountain surroundings where trout are located. He suggests that using a green 2- or 3-pound test line makes it almost impossible for the trout to see the line. Although using such a lightweight line can be challenging when snagging larger trout, he advocates using this weight when finesse fishing.
Perch
Perch are one of the fish that are commonly caught when ice fishing in the northern part of the United States, Canada and northern Europe. Kris Jskeilewicz of Fishing Online recommends using an extremely lightweight 0.1 or 0.14 test line when stalking perch. He also recommends that small lightweight lures and weights be used to keep the line placed where you can catch them but at the same time pull them in easily when they take the bait.