Salvelinus profundus

The deep lake trout ( Salvelinus profundus ), sometimes referred to as Lake Constance - depth char, is an extinct genus of freshwater fish species from the arctic char ( Salvelinus ) within the family Salmonidae. She was endemic in Lake Constance.

Features

The deep lake trout reached a standard length of 240 mm. He had 19 to 27 gill rakers. The body height at the beginning of the anus was 15 to 16 percent of standard length. The eye diameter was 1.3 - to 1.5 times the distance between the eye sockets and made 19 to 21 percent of the length of the head from. The snout was blunt, the mouth was under constantly. The mandible was surrounded by the maxilla. The flanks were yellowish to silvery, sometimes with pale bright spots. The abdomen was sometimes reddish. The brownish to reddish brown fins lacked the white edges of the other char species. The pectoral fin did not reach the anus.

Way of life

The deep lake trout occurred at a depth of 80 meters and fed on Turbellaria, copepods and pea shells. The spawning period was from July to February. The eggs were laid in 60 to 80 feet of water on the gravel base. Prisoners deep arctic char had often over-inflated bellies because the pressure difference of the great depth of water is so high the water surface that the air in the fish expands.

Status

The deep lake trout in 2008 was declared by the IUCN to be extinct. Up until the 1960s he was a frequent species caught in commercial fisheries of Lake Constance. When the eutrophication of Lake Constance in 1979 reached its peak, it prevented the reproduction of the deep arctic char. After several searches in a period of ten years yielded no results and the deep lake trout now considered extinct. Today, the name Deep Arctic char is sometimes used for the also occurring in Lake Constance form Salvelinus umbla.