Troutperch, silver chub; French: omisco.
The trout-perch gets its name from its superficial resemblance to trout, as it has a fat fin, and its body configuration to yellow perch or juvenile walleye. It has a rather deep cylindrical body with a slender tail, large eyes and a large unscaled head that is flattened on the underside. The coloration is clear yellow-olive with silvery spots on top and rows of dusky spots along the back and sides. A related species, the sandroller (P. transmontana), is smaller and slightly darker, with a more arched back.
Troutperch are found from Hudson Bay to the Yukon Territory and from the Potomac River west to Kansas. Sandroller are found in the Columbia River Basin.
Trout-perch inhabit lakes, backwaters, and the edges of medium to large stream basins. It is mostly a deep water fish.
The maximum length of this species reaches 6-8 inches. The common length is 3-5 inches.
Life history and Behavior
This species spawns in late spring, usually on the sandy-pebbly sections of tributaries and sometimes on the sandy shoals of lakes. Most trout-perch die after spawning, although some fish live to spawn twice.
Food and feeding habits
Trout-perch feed on aquatic insects and small crustaceans and usually move from deeper waters to shallower coastal areas at night to feed.
|Conservation status||Least Concern|
|Life span, years||4|
|Maximum body weight, kg||No information|
|Maximum length, cm||20|
|Sailing speed, m/s||No information|
|Threat to people||Edible|
|Way of eating||Predator|