Variation in genetics, morphology, and recruitment of the invasive barnacle (Gould, 1841) in the southern Korean peninsula.

The ivory barnacle is a marine crustacean, which presents near-cosmopolitan distribution due to extensive introduction and exhibits a wide spectrum of phenotypic variation. To elucidate geographical differentiation among populations through invasion, we investigated variation in genetic structure, shell morphology, and recruitment pattern for , from the southern Korean Peninsula where it has been established since the late 1980s. We selected samples from four populations in corresponding ecologically-relevant regions representing all surrounding South Korean waters.

Comparison of Recruitment Patterns of Sessile Marine Invertebrates According to Substrate Characteristics.

A community of benthic invertebrates, including sessile adult-stage invertebrates, can negatively effect corrosion, deformation, and increased fuel consumption by attaching to artificial structures, a phenomenon known as marine biofouling. Investigating the relationship between benthic communities and artificial structures or substrates (to which the organisms attach) can help clarify the factors influencing marine biofouling. Therefore, in our study, natural (stone) and artificial (rubber, tarpaulin, and iron) substrates were installed in three harbors (Mokpo, Tongyeong, and Busan), and the structures of the communities attached to each substrate were compared.

A new species of the genus (Asteroidea, Spinulosida, Echinasteridae) from South Korea.

A new species of the genus Gray, 1840 that belongs to the family Echinasteridae is described from South Korea. has epiphyseal ossicles at the ends of the abactinal and lateral plates, and the abactinal and lateral spines form a hooked crown. The partial sequence of the mitochondrial gene (537 bp) of was obtained, and the new species was morphologically and genetically compared with other related species.