SPECIES COMPOSITION OF CRAB IN MANGROVE ECOSYSTEM OF HAU LOC DISTRICT, THANH HOA PROVINCE
DOI:
https://doi.org/10.51453/2354-1431/2021/564Keywords:
Species composition, distribution, crab, mangrove, Hau Loc, Thanh HoaAbstract
Researching on crab species composition in the mangrove ecosystem of Hau Loc district was carried out in December 2020 at 19 sites representing the habitats in the study area. Research results have identified 26 species of crustaceans belonging to the infraorder Brachyura. These species belong to 19 genera, 8 families. The family with the most species is Sesarmidae with 7 species of 6 genera, followed by Dotillidae and Varunidae with 5 species of 4 genera. The remaining families all have 1 genus, and 1-3 species. The families Sesarmidae, Dotillidae and Varunidae are typical families for coastal mangrove ecosystems in Vietnam. Newly recorded the presence of Neosarmatium smithi, Perisesarma maipoense, Sarmatium germaini, Chiromantes dehaani, ... There are mainly widely distributed species such as Perisesarma bidens, Parasesarma plicatum, Metaplax elegans, Metaplax longipes, Macrophthalmus tomemtosus, etc. In the bare areas outside the mangroves towards the sea, the main species of Metaplax elegans, Macrophthalmus tomemtosus are found, species in the family Dotillidae such as Dotilla wichmanni, Scopimera bitympana, Ilyoplax formosensis, Ilyoplax ningpoensis; Newly planted lowland forest habitat, sparse trees encountered some species such as Metaplax elegans,…; In mangroves, the species mainly Perisesarma bidens, Parasesarma plicatum,...; The habitat of perennial plantations often appear large-sized species such as Neosarmatium smithi, Sarmatium germaini, ...; High-shore habitat along the mangrove forest often appear crab species that dig deep burrows on hard ground such as Helice latimera, Perisesarma maipoense, Chiromantes dehaani, Uca arcuata, ...
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