While not as widespread as the largemouth bass, the smallmouth bass (Micropterus dolomieu) has been widely transplanted so that it can be found in almost every region.
The smallmouth is easily distinguished from the largemouth by its clearly connected dorsal fins, and the upper jaw bone which extends only to about the middle of the eye. The coloration is also usually more brownish in the smallmouth and more greenish in the largemouth. Pound-for-pound, one of the most aggressive fighters in freshwater.
The smallmouth bass (Micropterus dolomieu) is a species of freshwater fish in the sunfish family (Centrarchidae) of the order Perciformes. It is the type species of its genus. One of the black basses, it is a popular game fish sought by anglers throughout the temperate zones of North America, and has been spread by stock to many cool-water tributaries and lakes in Canada and more so introduced in the United States. The maximum recorded size is approximately 27 inches and 12 pounds. The smallmouth bass is native to the upper and middle Mississippi River basin, the Saint Lawrence River–Great Lakes system, and up into the Hudson Bay basin. Its common names include smallmouth, bronzeback, brown bass, brownie, smallie, bronze bass, “hog”, and bareback bass.
The smallmouth bass is generally brown, appearing sometimes as black or green (seldom yellow) with red eyes, and dark brown vertical bands, rather than a horizontal band along the side. There are 13–15 soft rays in the dorsal fin. The upper jaw of smallmouth bass extends to the middle of the eye. The smallmouth’s coloration and hue may vary according to environmental variables such as water clarity or prey diet. Males are generally smaller than Females. The males tend to range around two pounds, while females can range from three to six pounds. Their average sizes can differ, depending on where they are found; those found in American waters tend to be larger due to the longer summers, which allow them to eat and grow for a longer period of time.
Their habitat plays a significant role in their color, weight, and shape. River water smallmouth that live in dark water tend to be rather torpedo-shaped and very dark brown to be more efficient for feeding. Lakeside smallmouth bass, however, that live in sandy areas, tend to be a light yellow-brown to adapt to the environment in a defensive state and are more oval-shaped.
They have been seen eating tadpoles, fish, aquatic insects, crayfish. They have been seen eating frogs, small mice,small birds, and even French fries. There are two recognized subspecies, the Northern Smallmouth Bass (M. dolomieui dolomieui) and the Neosho Smallmouth Bass (M. dolomieui velox).
The smallmouth bass is found in clearer water than the largemouth, especially streams, rivers, and the rocky areas and stumps and also sandy bottoms of lakes and reservoirs. The smallmouth prefers cooler water temperatures than its cousin the Largemouth bass, and may be found in both still and running water. Because it is intolerant of pollution, the smallmouth bass is a good natural indicator of a healthy environment, though it can better adjust to changes in water condition than most trout species. Carnivorous, its diet comprises crayfish, insects, and smaller fish; the young also feeding on zooplankton.
The female can lay up to 21,100 eggs, which are guarded by the male in his nest.
When the weather gets colder, and the water temperature drops below 15 C (60 F), smallmouth will often migrate in search of deeper pools in which they enter a semi-hybernation state, moving sluggishly and feeding very little until the warm season returns. The migration patterns of smallmouth have been tracked and it is not unusual for a smallmouth to travel 12 miles in a single day in a stream, creek or river. The overall migration can exceed 60 miles.
With increased industrialization and development, many of the nation’s eastern trout rivers were nasty, polluted, or allowed to silt up, raising water temperatures and killing off the native brook trout. Smallmouth bass were often introduced to northern rivers now too warm for native trout, and slowly became a popular gamefish with many anglers. Equally adaptable to large, cool-water impoundments and reservoirs, the smallmouth also spread far beyond its original native range. Later, smallmouth populations also began to decline after years of damage caused by overdevelopment and pollution, as well as a loss of river habitat caused by damming many formerly wild rivers to form lakes or reservoirs. In recent years, a renewed emphasis on preserving water quality and riparian habitat in the nation’s rivers and lakes, together with stricter management practices, eventually benefited smallmouth populations and has caused a resurgence in their popularity with anglers.
Today, smallmouth bass are very popular game fish, frequently sought by anglers using conventional spinning and bait casting gear, as well as fly fishing tackle. The smallmouth bass is one of the toughest fighting freshwater fish in North America. In addition to wild populations, the smallmouth bass is stocked in cool rivers and lakes throughout Canada and the United States. In shallow streams, it is a wary fish, though usually not to the extent of most trout. The smallmouth is highly regarded for its topwater fighting ability when hooked – old fishing journals referred to the smallmouth bass as “ounce for ounce and pound for pound the gamest fish that swims”. Smallmouth bass are taken for the table, with filets of white, firm flesh when cooked. Today, many fishermen practice catch-and-release fishing to improve fish populations.
The current all-tackle world record for a smallmouth bass is 11 lb 15 oz, caught by David Hayes in the Dale Hollow Reservoir, on the Kentucky/Tennessee border, in 1955.
In conventional fishing, smallmouth may be successfully caught on a wide range of natural and artificial baits or lures, including crankbaits, hair jigs, plastic jerkbaits, artificial worms, spinnerbaits, and all types of soft plastic lures, including curly tail grubs or tubes with lead head jigs. Spinning reels or baitcasting reels may be used, with line strengths of 2 to 15 pounds typically utilised. Rods are usually of ultralight to medium-heavy action. They may also be caught with a fly rod using a dry or wet artificial fly, nymphs, streamers, or imitations of larger aquatic creatures, such as hellgrammites, crawfish, or leeches. Floating topwater popper fly patterns and buzz baits are also popular for smallmouth fishing. For river fishing, spinning tackle or fly tackle has been the most popular angling tools for smallmouth in North America for many years.
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