[Decline of Gammarus lacustris Sars (Crustacea: Amphipoda) population in the delta of the Selenga River].
We determined the amphipod population characteristics from the water bodies of the delta of the Selenga River, where Gammarus lacustris Sars, 1863 was industrially harvested until the 1990s. In 2011, the population density of G. lacustris varied from 80 to 10 200 in Lapkhai Lake and from 80 to 2320 ind./m2 in Krivaya Channel. The low population density (< 40 ind./m2) in Gryaznoe Lake, together with the absence of the species in the waters of the former Zhilishchenskoe Lake, confirms the indications of population density decline in the associated waters of the delta. Population growth of G. lacustris was limited primarily by changes in the hydromorphology of the lakes and waterways due to floods of the early 1990s and the subsequent period of extremely low flow of the Selenga River.
D V
DV
Matafonov
N V
NV
Bazova
D033304:Amphipoda; D000818:Animals; D060106:Lakes; D011153:Population; D011156:Population Density; D011157:Population Dynamics; D045483:Rivers; D012426:Russia