Distribution of Moina Species (Crustacea: Cladocera: Moinidae) in Freshwater Habitats of Latakia Governorate, and Study of the Morphological Structure of Trunk Appendages in Moina micrura

Abstract

This study aimed to document the distribution of species belonging to the genus Moina (Crustacea: Cladocera) in freshwater habitats- rivers, reservoirs, and streams-within Latakia, Syria, as a contribution to the aquatic biodiversity and the determination of species abundance in Syrian freshwaters. These organisms represent essential component of freshwater ecosystems and an important part of natural diet of fish. Samples were collected from September 2024 to September 2025 at varying times from four sites in Latakia Governorate, with a sampling frequency of once per month, using a plankton net with a mesh size of 200 µm. The study documented the presence of three species of the genus Moina: Moina micrura, Moina brachiata, and Moina macrocopa. The species Moina micrura was found to be the most widespread and abundant in the studied areas compared to the other species. the anatomical structure of Moina micrura was examined, with particular attention to the thoracic appendages, in order to elucidate the mechanism of filter feeding. To clarify the geographical distribution of Moina species, most of the studies conducted in Syria and worldwide were incorporated.