Kaluga

Acipenser dauricus

Amur basin split into four populations and two forms

Kaluga is a freshwater fish found around Asia. It inhabits freshwater habitats. Records give a maximum length of 560 cm.

Class: Cartilaginous Ganoids
Order: Sturgeons and Paddlefishes
Family: Acipenseridae
Genus: Acipenser
Maximum length: 560 cm
Body shape: elongated
Distribution: Asia: Amur basin, ascending far up to the Argun, Shilka, and Onon. In the Amur Liman to the Amur estuary in the Sea of Okhotsk. Adults inhabit some lakes, like Orel Lake above Nikolaevsk. Also in the Ussuri and Sungari, China. Four populations are recognized in the Amur River basin: one lives in the estuary and coastal brackish waters of the Sea of Okhotsk and Sea of Japan, second is found in the lower Amur, third in the middle Amur, and fourth in the lower reaches of the Zeya and Bureya rivers in the Russian river banks (Ref. 40142 ). Two ecological morphs are present in the estuary population, the 'freshwater' and the 'brackish' water forms (Ref. 40142 ).

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