Tuesday, August 11, 2009

Lake Trout (Salmo trutta)

The large variety of the trout is especially abundant in mountain lakes and reservoirs. Even today it can be observed that the small brown trout grows into this large lake form when put in such waters. This transformation is accompanied by a change in clotting; this trout acquires a pervasive silvery sheen and has a scattering of black flecks, whilst the red spots, characteristic of the brown trout, disappear.

The lake trout grows much faster than the brown trout, it has a high-backed body and is generally more robust. It spawns in the tributaries of lakes and reservoirs together with the brown trout. That part of the trout population which stays in streams, develops into die brown trout, whilst those which move into a lake grow into the larger lake trout. The lake trout usually weighs between 3 and 6 kilograms, but specimens weighing over 30 kg are also known. The young trout live on invertebrates and larger lake trout feed on fish.

Maximum size and weight: 130 cm, 40 kg.

Identifying characteristics: Body coloured a monotonous silver with black spots; red spots lacking.

Other Trout Species: Rainbow Trout

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