Bivalves composition and ecological aspects of the Ba Lai River, an estuary of the Mekong Delta, Vietnam
Quang Xuan Ngo, Elena M. Sayenko and Konstantin A. Lutaenko
Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences (FSCEATB FEB RAS), Vladivostok, Russi
Benthic mollusk communities in the upper part of the Ba Lai River (the Mekong Delta), located upstream an irrigation dam, were investigated with respect to species composition, densities, biodiversity and some ecological aspects in 5 sampling stations. Densities of bivalve communities ranged from 21.5 ± 8.2 inds/10 cm2 to 28.5 ± 3.3 inds/10 cm2. In summary, 12 species from six Bivalvia families were recognised. Preliminary investigation on reproductivity of Corbicula blandiana showed the species is dioecious (specimens with separately female or male gonads were indicated), perhaps non-incubatory. Find of Meretrix lyrata, the most abundant commercial species in southern Vietnam, brings up a necessity on suitable policy and exploration in the Ba Lai to conserve valuable species for economic development and scientific purpose.
  
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