A successful introduction: the zander has settled down in Lake Sundozero and continues to spread

Scientists of the Institute of Biology KarRC RAS have published the results of long-term observations over the population of the zander (or pikeperch) introduced to Lake Sundozero more than a half-century ago. They confirm the species has become naturalized. Maintaining the population requires regulation of harvesting, protection during spawning, and tending of spawning grounds.

Ice-related phenomena on rivers emptying into the White Sea now last three weeks less than 60 years before

Ice on northern rivers now forms later while ice-off occurs earlier. Karelian scientists confirmed this having analyzed 64 years of marine and meteorological data from the estuaries of rivers draining into the White Sea along its western coast. Climate change has bit three weeks off the ice-covered period on these rivers. The reductions have been the most significant in the last 30 years, aligning with global warming trends in Arctic water bodies.