title: Status of Crayfish Populations (&lt;i&gt;Astacidae&lt;/i&gt;) on the Eastern Coast of the Caspian Sea
abstract: Aim . This work aims to study the distribution and stocks of crayfish on the eastern shelf of the Caspian Sea at places where they mostly habitat. Material and Methods . The studies were implemented in the spring and summer of 2019. The material was collected by scuba divers surveying routes of transects 100 m 2 in area. Collected crayfish were identified at species level, measured, weighed and their fertility was evaluated. Their abundance was calculated by estimating the aggregation density al
journal: South of Russia ecology development