Ladoga seal in the context of "Saimaa ringed seal"

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⭐ Core Definition: Ladoga seal

The Ladoga ringed seal (Russian: Ладожская нерпа; Pusa hispida ladogensis) is a freshwater subspecies of the ringed seal (Pusa hispida) found entirely in Lake Ladoga in northwestern Russia. This pinniped was isolated in freshwater lakes and separated from the Arctic ringed seal as a result of the isostatic rebound of the region following the end of the Weichselian Glaciation.

It is related to the even smaller population of Saimaa ringed seals in Lake Saimaa, a lake that flows into Ladoga through the Vuoksi River.

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👉 Ladoga seal in the context of Saimaa ringed seal

The Saimaa ringed seal (Pusa saimensis, Finnish: saimaannorppa) is a species of seal. It is among the most endangered seals in the world, having a total population of only about 500 individuals. The only existing population of these seals is found in Lake Saimaa, Finland. It has lived in complete isolation from other ringed seal populations for around 9,500 years, and have diverged into a morphologically and ecologically different species or subspecies. The population is descended from ringed seals that were separated from the rest when the land rose after the last ice age. This seal, along with the Baikal seal, the Ladoga seal, and the Ungava seal, is one of the few living freshwater seals.

The Saimaa ringed seal was previously considered a subspecies of the ringed seal called Pusa hispida saimensis.

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Ladoga seal in the context of Baikal seal

The Baikal seal (Pusa sibirica), also known as Lake Baikal seal or Baikal nerpa (нерпа), is a species of earless seal endemic to Lake Baikal in Siberia, Russia. The Baikal seal is one of the smallest earless/true seals, and the only exclusively freshwater pinniped species. The related Caspian seal inhabits another large, inland body of water, the Caspian Sea. Both species are closely related to the ringed seal, which inhabits the Arctic Ocean.

A subpopulation of inland harbour seals living in the Hudson Bay region of Quebec, Canada (the Lacs des Loups Marins harbour seals), as well as the Saimaa ringed seal and the Ladoga seal (both ringed seal subspecies), are also found in fresh water, but these seals are part of species that also have marine populations, instead of being distinct species.

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LINKED FROM (PARENTS)
← Baikal seal ← Nerpa (animal) ← Saimaa ringed seal
LINKS TO (CHILDREN)
Russian language → Freshwater seal → Ringed seal → Lake Ladoga → Russia → Pinniped → Arctic Ringed Seal → Isostatic rebound → Weichselian glaciation → Saimaa ringed seal → Lake Saimaa → Vuoksi River →