Branchinectella media Schmankewitsch, 1873
Common names: Russ: Brankhinektella srednyaya; Ukr: Brankhinektella serednyaya
Taxonomic descriptions: One of two species of the genus in the fauna of Eurasia.
Black Sea Regional level: EN
Subregion level: EN (Ukrainian sector)
Distribution: Range includes South Europe, Northern Kazakhstan, North Africa (Marocco, Algeria). Discovered in the north-western part of the Black Sea in saline water bodies of the Kinburn peninsula and adjacent areas of the Kherson and Mikolaiv oblasts (Golaya Pristan, Ochakov).
Habitats type, Critical habitats, Limiting factors: Saline water bodies (1.5-4.0 ppt), drying lakes in saline swamps.
Biology: Halobiont; filtering organisms; feeds on phytoplankton, detritus, organic matter and bacteria. Active at water temperatures of 4-24°C for 35-55 days (from late March to late May). Have latent eggs, 3-6 broods with 12-120 eggs each. Length of life cycle periods: nauplial 10-14, prereproductive - 12-17, reproductive - 26-34 days.
Population trends: Before 1940 was found in Kuyalnitsky, Khadzhibeysky and Molochny limans. Present population trends unknown.
Threats: Excessive antropogenic influence, in particular increase in water salinity, siltation of soil on irrigated lands.
Conservation measures taken: Included in Red Data Books of Ukraine and the Black Sea. Protected together with other hydrobionts in Chernomorsky Biosphere Reserve (Ukraine).
Conservation measures proposed: Organization of biological control for the state of the population.
Compiled by: B.Alexandrov