• Title/Summary/Keyword: Kinorhyncha

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First Record of Campyloderes macquariae Johnston(Kinorhyncha, Cyclorhagida, Centroderidae) from the North Pacific (북태평양에서 처음으로 보고하는 Campyloderes macquariae Johnston (동문동물문, Cyclorhagida목, Centroderidae과))

  • Young Hee song;Chang, Cheon-Young
    • Animal Systematics, Evolution and Diversity
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    • v.17 no.2
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    • pp.207-216
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    • 2001
  • Campyloderes macquariae Johnston, 1983 is reported from South Korea. Specimens were obtained from the washings of subtidal sediments, holdfasts of macroalgae, and various invertebrates. This is the first record for genus Campy-loderes from the North Pacific. Affinities with its congeners and the variability within species are discussed, with the confirmation of several morphological details by scanning electron microscopy.

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Echinoderes lanceolatus, a New Kinorhynch from Korea (Kinorhyncha, Cyclorhagida, Echinoderidae) (동문동물 1신종, 표창자라목벌레 (Echinoderes lanceolatus)의 기재(동문동물문, 원통자라목벌레목, 가시자라목벌레과))

  • Chang, Cheon-Young;Song, Young-Hee
    • Animal Systematics, Evolution and Diversity
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    • v.18 no.2
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    • pp.203-211
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    • 2002
  • A new kinorhynch species belonging to the genus Echinoderes is described on the basis of the materials from the subtidal sediments and various macroalgae in the south and east coast of Korea. Echinoderes lanceolatus n. sp. is characteristic in having the subcuticular scars in subventral position on segment 3 and incomplete midventral articulation on segment 4, the middorsal spines a little shorter than the corresponding segments, the ‘brace-shaped’muscle scars at sternal plates of segments 9 and 10 in females, the flat posterior margin of terminal ventral plates and the lanceolate terminal tergal extension.

Community Structure of Meiobenthos for Pollution Monitoring in Mariculture Farms in Tongyong Coastal Area, Southern Korea (통영 저도와 장두도 가두리 양식장 퇴적물에 있어서 오염 모니터링을 위한 중형저서생물의 군집구조)

  • KIM Dong Sung;CHOI Sin-Woo;JE Jong-Geel
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.31 no.2
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    • pp.217-225
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    • 1998
  • This study was performed to compare the effects of a fish cage on the structure of meiobenthic communities at two locations during May, 1996. The number of meiofaunal taxa at the existing cage site and control site was 15 and 26, respectively. Nematoda was the most dominant group of meiobenthos. Nematoda and Sarcomastigophora comprised more than $90\%$ of total meiofauna at both sites. The total density of control site was 7,702 inds./$10\;cm^{2}$ which is 10 times more than that of fish cage site. The density was highest in the upper 1 cm and decreased with sediment depth. The nematodes/harpacticoid copepods ratio as an index of pollution monitoring for benthic ecosystem at fish cage site was two times higher than at control site. Kinorhyncha known to be sensitive to pollution stress was not found at fish cage site.

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Study on the Community Structure of Sublittoral Meiofauna in the Barents Sea in Summer 2002, Arctic Ocean (2002년 하계 북극 바렌츠해 연안지역의 중형저서생물 군집 구조에 관한 연구)

  • Lee Kang Hyun;Chung Kyung-Ho;Kang Sung-Ho;Lee Wonchoel
    • Korean Journal of Environmental Biology
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    • v.23 no.3 s.59
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    • pp.257-268
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    • 2005
  • Meiofauna community was surveyed in the Arctic Ocean. Sediment samples were collected from six stations in the east Barents Sea and from five stations in Kongsfjorden, Svalbard during summer 2002. Eight taxa of meiofauna were identified in the Barents Sea. Meiofauna abundance ranged from 245 to 906 indiv.10 $cm^{-2}$ (mean 580 indiv.10 $cm^{-2}$) and total biomass varied from 23 and 404 ${\mu}gC10cm^{-2}$ (mean 184 ${\mug}C10cm^{-2}$) in the Barent Sea. Nematode predominated in meiofauna comprising $95.2\%$ of total abundance and $66.4\%$ of biomass. Copepods, polycheats and sarcomastigophonans were also dominant in the study area. Nine taxa of meiofauna were identified in Kongsfiorden. Meiofauna abundance ranged from 103 to 513 indiv.10 $cm^{-2}$ (mean 292 indiv.10 $cm^{-2}$) and biomass varied from 13 and 196{\mu}gC10\;cm^{-2}$ (mean 94{\mu}gC10\;cm^{-2}$) in the Kongsfiorden. Nematodes predominated in meiofauna, comprising $64.1\%$ of abundance and $64.3\%$ biomass. Copepods, polychaets, and kinorhyncha were also dominant in the study area. The meiofauna abundances from both the study areas well match with the previous reports from the various regions including the temperate areas. However the occurred taxa in the present study are only a half comparing with the reports from temperate zone. Meiofauna abundance, biomass, diversity index and species richness were much higher than in the coastal which were strongly affected by fresh water run off in the Barents Sea. The stations affected by chlorophyll had high abundance and biomass, but low diversity index and spices richness in Kongsfiorden.