History of sturgeon propagation and restocking in the Caspian Sea | ||
| ماهیان خاویاری | ||
| Volume 3, Issue 4, January 2021, Pages 7-15 PDF (595.87 K) | ||
| Document Type: Tarvij | ||
| Authors | ||
| Shahram Abdolmalaki* ; mohamadreza khoshghalb* ; seyedali mosavi* ; mehdi alizadeh* | ||
| Head of Stock Assessment Department | ||
| Abstract | ||
| Sturgeon is one of the oldest fish widely distributed in the Northern Hemisphere, and many species of sturgeon are critically endangered due to degradation of habitat and overfishing. The need to build hatcheries for the reproduction and restocking of sturgeon stocks was created during the years 1930-1940 due to the construction of dams on rivers, which led to the destruction of sturgeon spawning grounds, and during 1955-1980, 11 hatcheries for artificial propagation and Sturgeon restocking was established in the Caspian Sea. In the 1980s, more than 130 million of 1-3 gram fingerlings were released annually to strengthen sturgeon stocks. Unfortunately, in 2017, the number of released fingerlings reached 45.1 million. In Iran, there are six hatcheries with an area of about 500 hectares that started releasing sturgeon in the Caspian Sea since 1973, and the number of released fingerlings from 24.5 million in 1973 reached to 24.5 million in 1998 and then with a descending trend, decreased to 2.9 million individual in 2019. The cooperation of all Caspian littoral states is crucial to prevent poaching and saving the sturgeon and also multilateral cooperation in the field of Caspian sturgeon restocking is vital. | ||
| Keywords | ||
| Sturgeon; Restocking; History; Caspian Sea | ||
| References | ||
|
| ||
|
Statistics Article View: 635 PDF Download: 843 |
||
Journal management system. designed by sinaweb