The Sturgeon Specialist Group (SSG) is a global network of over 40 sturgeon experts contributing to the conservation and sustainable use of sturgeon with members in more than ten major sturgeon range states. The SSG was established under the auspices of the Species Survival Commission of IUCN. The SSG works in collaboration with various compenents of IUCN, such as the Species Programme and TRAFFIC (a joint programme of IUCN and WWF). The SSG is well positioned to address the threats facing sturgeon species.
The Co-Chairs of the Sturgeon Specialist Group are:
Prof Dr Mohammad Pourkazemi
Director, Iranian Fisheries Science Research institute
P.O.Box: 14965-14, Tehran, Iran
Tel: +98 21 4478 7584 (5)
Fax: +98 21 4478 7955
Dr Phaedra Doukakis
Facts and figures about sturgeon species
The Acipenseriformes or sturgeons and Paddlefish are large sized, late maturing ray-finned fishes (Actinopterygii) with an average life span ranging from 12 - 80 years, depending on species; some individuals of the larger species may live 140 years or more.
The order consists of two extant families, Acipenseridae with five genera and 26 species; and Polyodontidae with one genus and two species. The family includes anadromous and freshwater species of circumpolar distribution in the northern hemisphere (USA, Canada, Europe, Siberia, the Caspian Black and Azov Seas, China and Japan).
They are adapted to live in the large lakes, and extensive river systems that provide the diverse habitat they require for all or part of their life history. Although many species are adapted to live in marine environments along the coast, all spawn in freshwater. The Caspian Sea, with an area of 400, 000 km2, is the largest inland salt-water body in the world, and home to the greatest variety and number of sturgeons in a single water body, with 6 species. Many species undergo spawning migrations and other movements that take them across international borders.
These characteristics make sturgeon vulnerable to the impacts of human activities, especially capture for caviar and meat, as well as habitat loss and degradation from damming of rivers and pollution. Historically, exploitation and fishing (including poaching) have caused drastic declines in targeted species, however many species are also indirectly impacted as bycatch in fisheries for other fish species.