Increased tourist activity in coastal regions demands management strategies to reduce impacts on rocky shores. The highly populated coastal areas in southeastern Brazil are an example of degradation caused by development of industry and tourism. Among different shore impacts, trampling has been intensively studied, and may represent a significant source of stress for intertidal fauna. A randomi...

Nghiên cứu thành phần loài và phân bố động vật đáy trong khu vực nhận chìm nhà máy nhiệt điện Vũng Áng 1 - Hà Tĩnh được tiến hành vào tháng 9/2019. Kết quả đã xác định 113 đáy, gồm 7 nhóm đại diện (Crustacea, Bivalvia, Gastropoda, Polychaeta, Echinodermata Chordata Scaphopoda). Ba chiếm ưu thế hệ sinh thái là Hai mảnh vỏ có 49 loài, Thân mềm Chân bụng 44 Giáp (Crustacea) 11 loài. Other groups a...

Data about the taxonomic composition and spatial distribution of bottom invertebrates Kronotsky Gulf were obtained on results grab survey carried in September 2002. Analysis samples revealed 72 species Polychaeta, 21 molluscs (Bivalvia), 17 crustaceans (mostly Amphipoda), 2 echinodermata (Echinoidea Ophiuroidea). The average biomass depth range 25–200 m was 242±116 g/m where density 306±51 orga...

Results of the survey mollusks in rocky tidal zones at 22 sites along Phu Quoc island April 2019 has identified 42 taxa Mollusks, belonging to 3 classes: Gastropoda (25 taxa), Bivalvia (16 taxa) and Polyplacophora (1 taxon). Species composition between stations varies from 2 9 species. The average density was 21.07 individuals/m2, ranging 3.67 individuals/m2 Southeastern Kim Qui 84.22 Hon Dam N...

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Scientific names: Crassostrea gigas (Thunberg 1793), Ostreidae, Bivalvia Synonyms: Gryphaea angulata Lamarck 1819; Ostrea gigas Thunberg 1793; Ostrea laperousii Schrenk 1861; Ostrea talienwhanensis Crosse 1862. Note: The Portuguese oyster Crassostrea angulata is a name often used for this species. According to genetic studies it was shown that Crassostrea angulata is likely a strain of Crassost...

The 18S rRNA sequences of 12 molluscs, representing the extant classes Gastropoda, Bivalvia, Polyplacophora, Scaphopoda, and Caudofoveata, were determined and compared with selected known 18S rRNA sequences of Metazoa, including other Mollusca. These data do not provide support for a close relationship between Platyhelminthes (Turbellaria) and Mollusca, but rather suggest that the latter group ...

Doubly uniparental inheritance (DUI) provides an intriguing system for addressing aspects of molecular evolution and intermolecular recombination of mitochondrial DNA. For this reason, a large sequence analysis has been performed on Tapes philippinarum (Bivalvia, Veneridae), which has mitochondrial DNA heteroplasmy that is consistent with a DUI. The sequences of a 9.2-kb region (containing 29 g...

Understanding how microsatellites are distributed in eukaryotic genomes is important to clarify the differential abundance of these repeats under an evolutionary scenario. We have concatenated data from 3165 DNA sequences of 326 Bivalvia species to search for taxonomic patterns of microsatellite distribution in genomic regions of markedly different functionality. Some microsatellite motifs in b...

A phylogenetic reconstruction based on 506 nucleotides near the 5' end of the 18S subunit of ribosomal DNA (rDNA) in 2 gastropod, 3 chiton and 28 bivalve mollusks supported the monophyly and sister group relationship of the subclasses Heterodonta and Palaeoheterodonta but could not confidently establish either the monophyly or the phylogenetic relationships of the morphologically well defined s...