| Salmonidae (Salmonids), subfamily: Coregoninae |
| 24 cm SL (male/unsexed) |
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benthopelagic; freshwater; depth range 20 - 80 m |
| Europe: lakes Zürich and Walenstadt, Switzerland. |
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| Lacustrine, in deep waters. Feeds on plankton in midwater and on benthic invertebrates (snails, chironomids). Spawns near shores at depths of 20-80 m. (Ref. 59043). |
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Data deficient (DD); Date assessed: 01 January 2008 Ref. (130435)
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| harmless |
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Known from lakes Zürich and Walenstadt. At present there is a homogenous population in Lake Walenstadt which spawns October - November. Fifty years ago, there were two populations, one spawning July-September and the other December-February. The winter-spawning population is said to have appeared in 1899. It has been hypothesized that displacement of spawning grounds, changes in temperature, and possibly invasion by a species from Lake Zürich resulted in a hybrid population (involving 2 or 3 species), which is now stabilizing after severe environmental problems which impacted the lake at the beginning of the 19th century (Ref. 59043). |
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