The Current State of Zooplankton Diversity in the Middle Caspian Sea during Spring
Aubakirova M. Mazhibayeva Z. Assylbekova S.Z. Isbekov K.B. Barbol B. Bolatbekova Z. Jussupbekova N. Moldrakhman A. Satybaldiyeva G.
July 2023Multidisciplinary Digital Publishing Institute (MDPI)
Diversity
2023#15Issue 7
The study of planktonic animals of the Caspian Sea is topical and, during the last centuries, has brought and continues to bring new results. This is an inevitable process attributed to the introduction of non-indigenous predatory representatives of zooplankton by ballast water of ships. During the study period, the zooplankton of the Middle Caspian Sea was represented by 13 taxa and consisted mainly of non-indigenous species typical of the Palearctic region. Native fauna was represented by three species—cladoceran Evadne anonyx, Podonevadne camptonyx, and copepod Halicyclops sarsi during the study period. The quantitative variables of zooplankton did not reach a high level in May 2020 and 2021 compared to the data of previous years. Cladocerans Podonevadne camptonyx, copepods Acartia tonsa, and larvae of Cirripedia dominated in 2020. By 2021, the dominant species of last year had been replaced by the cladoceran Evadne nordmanni. One-way ANOVA analysis detected significant differences in the quantitative variables of cladocerans and copepods between different years of zooplankton study. The decreasing abundance, biomass, and alteration of the dominant zooplankton species in the Middle Caspian Sea during the study period may be associated with the feeding type of predator species and a slight elevation of water salinity.
cladocera , copepoda , food base , non-indigenous species , predator , zooplankton
Text of the article Перейти на текст статьи
Laboratory of Hydrobiology, Fisheries Research and Production Center, Almaty, 050016, Kazakhstan
Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Institute of Zoology, Almaty, 050060, Kazakhstan
Faculty of Bioresources and Technology, Kazakh National Agrarian Research University, Almaty, 050010, Kazakhstan
Department of Ecology, Saken Seifullin Kazakh AgroTechnical Research University, Astana, 010011, Kazakhstan
Laboratory of Hydrobiology
Faculty of Biology and Biotechnology
Institute of Zoology
Faculty of Bioresources and Technology
Department of Ecology
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026