• Fisheries and Aquatic Sciences
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• v.14 no.3
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• pp.205-209
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• 2011

Organic pollution causes eutrophication and dystrophication, which occur when excessive amounts of organic matter enters seawater. Eutrophication can contaminate sediment and harm aquaculture. Polychaeta species have been shown to restore eutrophic sediment. In this study, we used peptone to simulate a eutrophic environment and detect the levels at which eutrophication became toxic to the polychaete Perinereis aibuhitensis. Peptone concentrations were 0, 100, 200, and 500 mg/L. The median lethal concentrations were 950.35 mg/L at 48 h, 340.34 mg/L at 72 h, and 120.22 mg/L at 96 h, which are much higher than those of other aquatic species. Polychaeta species are highly tolerant of eutrophication. During the 15-day long-term experiment, sediment loss on ignition, as well as seawater total organic carbon and total nitrogen all decreased significantly (P<0.05). However, $NH_4^+$ concentration increased with time. Perinereis aibuhitensis slowed the increment of $NH_4^+$ but could not prevent its increase. Our results indicate that this polychaete is helpful in the recovery of seawater and sediment from eutrophication.

• Journal of Species Research
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• v.5 no.3
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• pp.517-529
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• 2016

Two scale worms of the family Polynoidae, Arctonoe vittata (Grube, 1855) and Hyperhalosydna striata (Kingberg, 1856) were found for the first time from Korea by SCUBA diving survey. The two species are free-living organisms or associated commensally with a wide variety of other invertebrates. Specimens of A. vittata were collected from the East Sea and were closely associated with asteroids, holothuroids, gastropods and nudibranchs species. Specimens of H. striata were collected from Jeju-do Island, and of these, one specimen was collected in a tube of eunicid species. The two species can be easily distinguished from their congeners by distinct morphological characteristics as follows: (1) A. vittata has pigmented band near segment eight and two kinds of neurochaetae; (2) H. striata has reddish-brown longitudinal striped elytra. The morphological key characteristics of both species agreed well with their original descriptions and redescriptions. In this study, the descriptions, detailed illustrations and ecological photographs of two species based on Korean materials were provided.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.32 no.1
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• pp.1-4
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• 1999

A maldanid polychaete, Axiothella quadrimaculata Augener, 1914, is newly recorded in Korean fauna. Genus Axiothella is found for the first time in Korean waters. The specimen was collected in the Eisenia bicyclis bed by SCUBA diving. The species is described with figures and the key to genera was revised. Including this Axiothella quadrimaculata, a total of 18 species representing 13 genera are known to the Korean Maldanid polychaetes.

• Animal Systematics, Evolution and Diversity
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• v.12 no.4
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• pp.313-329
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• 1996

The present study was based on the specimens collected from the Yellow Sea between Sept. 17 and Oct. 2, 1992 within the framework of Korea-China Yellow Sea Research Joint Program. Additional materials were also provided from the benthic samples collected from the tidal mud flats surrounding Inchon, Korea and from the subtidal shallow waters of the Kwang-yang Bay in the southern coast of Korea. Paraonid polychaetes have not been previously reported form Korea waters. Here, a total of six species in two genera are described and illustrated, and they are newly recorded in Korea polychaetous fauna : Cirrophorus furcatus, Cirrophorus armatus, Cirrophorus branchiatus, Aricidea (Aedicira) pacifica, Aricidea (Aricidea) wassi, adn Aficidea (Acesta) assimilis.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.55 no.5
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• pp.583-589
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• 2022

The feeding habits of the marbled flounder Pseudopleuronectes yokohamae were studied using 384 specimens (10.7-52.3 cm in total length) collected from the West Sea, Korea between January and December 2021. P. yokohamae ate mainly polychaeta and gastropoda, incuding teleostei, caridea, euphausiacea, amphipoda and brachyura. The mean number of preys per stomach (mN/ST) showed a statistically significant difference, and the mean weight of prey per stomach (mW/ST) increased as the total length increased. P. yokohamae ate mainly teleostei in spring and winter. P. yokohamae ate mainly euphausiacea in summer and mainly polychaeta in autumn.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.38 no.6
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• pp.399-412
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• 2005

This study investigated the composition and the distribution of the benthic polychaeta community in the semi-enclosed Yoja Bay on the southern coast of Korea and was designed to deduce temporal changes in the community with the comparison of the previous studies. In YoJa Bay, benthic polychaetous community structure was investigated on the base of the samples from 87 stations. The surface sediment was mainly composed of fine-grained sediment, mixed clayey silt and silty clay. The total benthic macrofaunal density was $387 indiv./m^2$, and the density was higher in the middle bay, and in the mouth of bay than in the inner bay. scapharca subcrenata (Bivalvia) and amphipods (Crustacea) were important species in the inner and the middle of the bar, respectively. Benthic polychaetes were comprised of 72 species with a mean density of $149 indiv./m^2$. Their distributions showed higher densities in the mouth of bay than in the rest of bay. The dominant species over 1.0 percentages were composed of the 20 species, and they occupied $84.5\%$ of the total density. The most dominant species was Sternaspis scutata ($13.6\%$), fallowed fly Heteromastus filiformis ($9.8\%$), Polynoidae indet. ($8.3\%$), Sigambra tentacuzata ($7.1\%$) and others. The cluster analysis revealed that the study area was divided into three station groups. At the station group YI located in the inner bay, the most dominant species was Heteromastus filiformis . At the station group YII in the middle bay, the dominant species was Sternaspis scutata. And at the station group YIII in the mouth of bay, the dominant species was Paraiacydonia paradoxa. Whereas Sternaspis scutata and Mediomastus sp. were the dominant species in the past study, Heteromastus filiformis and Tharyx sp. appeared newly to be the dominant species, even if their low densities that in the past. These facts mean that Yoja Bay be maintained yet as little polluted area compared to other bays on the coast of Korea, but needed some caution of marine environmental management.

• Animal cells and systems
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• v.5 no.1
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• pp.1-9
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• 2001

Terebelliphilus simplex n. gen., n. sp. and Myxomolgus invulgus n. sp. are described from the tubicolous polychaetes found in the intertidal shores in the Yellow Sea. The new genus Terebelliphilus belongs to the family Sabelliphilidae but is characteristic in bearing the reduced segmentations In legs 1-4, an unusual sexual dimorphism in antennule, and the ventral location of genital areas. Myxomolgus invulgus is readily distinguishable from its congeners by the morphological features of rostrum, antennule, mandible, maxilla, leg 4 and female leg 5.

• 한국해양학회지
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• v.11 no.2
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• pp.71-76
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• 1976

This work concerns with the biotic study of the polychaeta population in the intertidal flat, Inchon, Korea. Magelona japonica was found to be the most abundant species, comprising 54% of total organisms examined. The presence of large numbers of Magelona japonica and Sternaspis scutata, high value of species diversity indices (H(s)), and the absence of the particular pollution indicator species, except a few Prinospio pinnata, suggest that the study area appears not to be polluted during the study period.

• Korean Journal of Environmental Biology
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• v.33 no.3
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• pp.274-278
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• 2015

A newly recorded glycerid polychaete collected from mud of the tidal flat in the southwestern coast of Korea is identified as Glycera fallax Quatrefages, 1850 based on the morphologies of papaillae and ailerons on proboscis, parapodial postsetal lobes, and branchiae. In this paper, we provide a detailed description and illustration of Korean materials of this species and a key to the species of the genus Glycera from Korean waters.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.422-423
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• 2000

해양의 저서동물은 이동성이 없어 오염 지표종으로 사용되는 종류가 많으며, 특히 환형동물문의 다모류 가운데 그 종류가 많다. 대표적인 경우가 버들갯지렁이과 (Capitellidae)에 속하는 종들이며, 이들 가운데 Capitella capitata는 전 세계 유기물 오염해역, 저층 빈산소 수역 (0.2∼2.5 m1/1) 및 유류 오염해역 둥에서 가장 잘 출현하는 종으로 알려져 있다 (Pearson and Rosenberg, 1978). (중략)