The Lacustrine Trout has the scientific name Salvelinus namaycush, is of the same genus as the Trout Bull and the Trout of Arroyo. Lake trout are native to the drains of the St. Mary and Missouri rivers and have been introduced to some other scattered mountain lakes, Flathead Lake and Fort Peck Reservoir. Lake trout is one of the main game fish in much of Canada and was once a staple of the Great Lakes fishery.
CHARACTERISTICS OF THE LACUSTRE TROUT
Like other fish, lake trout have light spots on a dark background that can vary from light green to almost black. In the pectoral, pelvic and anal fins there is a narrow border, sometimes indistinct and white. The lake trout is distinguished from other fish by its deeply forked tail.
1 – SIZE AND WEIGHT OF THE LACUSTRE TRACHE
In the Inari Lake the Lacustrine Trout reach to measure normally 40 to 80 cm in length and in spite of between 0.7 to 2 kg, at most they can arrive to weigh 7 kilograms.
2 – APPEARANCE OF THE LACUSTRE TRACHE
The lake trout has clear spots on a black to gray background, which progressively becomes clear by moving along the side of the fish. The belly is white. The lower fins are often orange to orange-red with a white front edge. The darker colored back has a dorsal fin and a fat fin. The tail or caudal fin is deeply bifurcated with upper and lower lobes of equal size. The anal fin has 8-10 rays with a white front edge.
HABITAT OF THE LACUSTRE TROUT
The native range of lake trout includes the cold water regions of northern Canada, Alaska, the Great Lakes and parts of New England. The species has been widely introduced outside of its native range in many parts of the western United States and in other areas, including New Zealand, South America and Sweden.
FEEDING OF THE LACUSTRE TROUT
Of juveniles, the lake trout feed on zooplankton and small invertebrates. As they mature, their feeding patterns change and the fish become opportunistic piscivorous.
As adults, lake trout are generally pisciversivas, feeding on a wide variety of prey pelagic species. In the region of the Great Lakes, alewives, silverside, sculpture and fat are a large part of the diet of lake trout.