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Smallmouth Bass (Micropterus dolomieui)


Smallmouth bass are typically found in large, clear reservoirs and clear, cool
streams with many large pools and abundant cover. They are common in large
tributaries to the San Joaquin River, in the Transition Zone. They may be
associated with the native fish of that area, Sacramento sucker, Sacramento
pikeminnow, and occasionally rainbow trout. Much of the stream habitat in the
Transition Zone has been diminished by the construction of dams in those areas.
In reservoirs, smallmouth bass occur at the upstream end of the impoundment,
or narrow bays with rocky shelves.

Smallmouth bass are less solitary than largemouth bass and may live in small,
localized populations. Feeding habits are similar to those of largemouth bass.
Smallmouth bass fry feed mostly on rotifers and small crustaceans until they
reach 5 cm TL, when they begin feeding on aquatic insects and small fish.
Despite being mostly piscivorous, other prey items may include crayfish and
amphibians.

Smallmouth bass spawn for the first time in their third or fourth year. Spawning
behavior is similar to that of largemouth bass.

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