Table4.Natural hybridization of sturgeon species and their ploidy.Interspecies hybrids Intergenera hybrids
- Caspian Sea basin^1
(a) Volga River
A. ruthenus(4n)×A. stellatus(4n)
A. stellatus(4n)×A. ruthenus(4n)
A. nudiventris(4n)× A. gueldenstaedtii(8n)
A. gueldenstaedtii(8n)×A. ruthenus(4n)^2
A. gueldenstaedtii(8n)×A. stellatus(4n)
A. gueldenstaedtii(8n)× A. persicus(8n)^3
H. huso(4n)×A. gueldenstaedtii(8n)
H. huso(4n)× A. ruthenus(4n)(b) Kama River Husohuso(4n)×A. nudiventris(4n)
H. huso(4n)×A. gueldenstaedtii(8n)
H. huso(4n)×A. stellatus(4n)
A. ruthenus(4n)×H. huso(4n)
H. huso(4n)×A. stellatus(4n)(c) Ural River
A. nudiventris(4n)×A. stellatus(4n)
A. stellatus(4n)×A. nudiventris(4n)
A. nudiventris(4n)×A. stellatus(4n)
A. stellatus(4n)×A. nudiventris(4n)
A. nudiventris(4n)×A. gueldenstaedtii(8n)
A. nudiventris(4n)×A.stellatus(4n)
A. nudiventris(4n)×A. gueldenstaedtii(8n)(d) Kura River
H. huso(4n)×A. nudiventris(4n)(e)Sefir-Rud River(f) Caspian Sea- Sea of Azov basin^4
Don River
H. huso(4n)× A. persicus(8n)A. ruthenus(4n)× A.stellatus(4n)- Black Sea basin^5
(a) Danube
A. ruthenus(4n)×A. stellatus(4n)
A. ruthenus(4n)×A.nudiventris(4n)
A.stellatus(4n)×A. ruthenus(4n)
A. ruthenus(4n)×A. gueldenstaedtii(8n)
A. stellatus(4n)×A. gueldenstaedtii(8n)
A. nudiventris(4n)× A. gueldenstaedtii(8n)
A. sturio(4n)× A. gueldenstaedtii(8n)
A. gueldenstaedtii(8n)×A. sturio(4n)
A. gueldenstaedtii(8n)×A. nudiventris(4n)
A. gueldenstaedtii (8n)H. huso (4n)
A. stellatus(4n)× H. huso(4n)
A. nudiventris(4n)×H. huso(4n)
H. huso(4n)×A. stellatus(4n)(b) Black Sea- Siberian rivers
Main rivers (Yenisey, Lena, Ob, Kolyma)^6 Amur River^7
A. baerii(8n)× A. ruthenus(4n) Huso dauricus(4n)×A. schrenckii(8n?) - Central Asia^8
Amu-Darya River
Pseudoscaphirhyncus kaufmanni(4n)×P. hermanni - North America^9
Missouri and Mississippi Rivers
Scaphirhynchus albus(?)×S. platorynchus(4n)
(^1) Data from Berg (1911,1948b), Kozhin (1964), Kozlov (1970), Legeza (1971), and Keyvanfar (1988).
(^2) In the early 1950s, this hybrid was the most numerous (46% of all hybrids caught; Konstantinov et al. 1952).
(^3) Data from Vlasenko et al. (1989b).
(^4) Data from Berg (1948b) and Kozhin (1964).
(^5) Data from Antipa (1909), Antoni-Murgoci (1946), Banarescu (1964), and Berg (1948b).
(^6) Data from Berg (1948b).
(^7) Data from Berg (1948b), Wei et al. (1996), and Krykhtin & Svirskii (1996).
8 Data from Nikolskii (1938) and Berg (1948b).
(^9) Data from Carlson et al. (1985).