Caspian sturgeon population declining to critical level - AzerNews
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Recent studies show that the number of sturgeons in the Caspian Sea has decreased to a critical level, a leading expert said.
Ilham Alekperov, Head of the Zoology Institute of the Azerbaijan National Academy of Sciences, said the main reason for the decline of the sturgeons in the Caspian Sea is primarily a large-scale illegal fishing in the rivers and the sea. “Sturgeon fishing throughout the year led to a decrease in their population.”
Conducting seismic exploration in the Caspian Sea has also had an impact on the reduction of the sturgeons’ number, Alekperov added.
The comb jelly, made its way from the Black Sea to the Caspian Sea using the ballast water of ships, and now is growing rapidly, the director said.
Joint research with American scientists has shown that the comb jelly has badly harmed plankton of the Caspian Sea. Mnemiopsis used Caspian plankton as food and rapidly multiplied.
#caviar, #esturgeon
#Cténophore, #espèce_invasive
#prospection_sismique
