Ladoga seal activities. The Ladoga seal is listed as an Appendix II species under the Bern Convention and also included in the Red Data Book of the Russian Federation. Ladoga seal The Ladoga ringed seal (; Pusa hispida ladogensis), is a freshwater subspecies of the ringed seal ("Pusa hispida") which are found entirely in Lake Ladoga in northwestern Russia. The subspecies evolved during the last ice age, about 11,000 years ago. As the glaciers retreated and water levels changed, the Baltic ringed seal (including Ladoga seals) was trapped in freshwater lakes and separated from the Arctic ringed seal. It is related to
Ladoga Canal a major disappointment to the government. Although the canal was one of the largest hydroengineering facilities in 18th-century Europe, it was still too shallow to maintain a considerable traffic. Catherine the Great decided to expand the canal by building another section between the Volkhov and Syas Rivers. This project was implemented between 1765 and 1802 (so-called Syas Canal). The third part of the Ladoga Canal, connecting the Syas and the Svir, was built over the years 1802 to 1810 (so-called Svir Canal). In the course of the 19th century, the Ladoga Canal was used by about 15,000 vessels and 10,000