• Title/Summary/Keyword: Hexactinellida

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A Systematic Study on the Marine Sponges in Korea. 7. Demospongiae and Hexactinellida (한국산 해산해면류의 계통분류학적 연구 7. 보통해면류와 육방해면류)

  • 심정자;김미희
    • Animal Systematics, Evolution and Diversity
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    • v.4 no.1
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    • pp.21-42
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    • 1988
  • 1985년부터 1987년에 걸쳐 남한의 동·서·남해로부터 채집된 해면동물과 그 동안 미해결로 보류되어 있던 표본들을 조사한 결과 총 24종이 밝혀졌는데 이중에서 23종은 보통해면류 이었으며 6종이 한국미기록종이고, 1 종은 육방해면동물로서 신종임이 판명되어 Aphrocallistes jejuensis 라고 명명기재한다. 한국미기록종에 대하여는 특기와 도판을 첨가하였다.

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The Distribution of Epifaunal Megabenthos Varies with Deep-sea Sediment Conditions in the Korea Deep Ocean Study Area (KODOS) of the North-eastern Pacific (북동태평양 KODOS 해역 심해 해저특성에 따른 초대형저서동물 분포)

  • Yu, Ok Hwan;Son, Ju Won;Ham, Dong Jin;Lee, Gun Chang;Kim, Kyeong Hong
    • Ocean and Polar Research
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    • v.36 no.4
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    • pp.447-454
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    • 2014
  • In August, 2013, we collected epifaunal megabenthos using a deep sea camera (DSC) around a benthic impact study (BIS) site. This was located in the KR5 block of the Korea Deep Ocean Study (KODOS) area in the Northeastern Pacific. The DSC was positioned at $6.8{\pm}2.9m$ (SD) from the sea bottom and was operated from a position at $131^{\circ}56.85^{\prime}-131^{\circ}55.02^{\prime}W$ for 2.3 h at a speed of 1-2 knot. The geographical features of the study area consisted of two structures; a trough in the middle and hills at the east and west sides. Sediment conditions were consistent within six blocks and were affected by slope and polymetallic nodule deposits. We analyzed 226 megafaunal species. Sipunculida comprised the highest percentage of individuals (39%), and the dominant epifaunal megabenthos were Hormathiidae sp., Primnoidae sp., Hexactinellida sp., Hyphalaster inermis, Freyella benthophila, Paelopatides confundens, Psychropotes longicauda, and Peniagone leander. More than 80% of the total density of megafauna occurred on sea plain (D- and E-blocks). We found two distinct groups in the community, one located on sea plains and the other along both sides of the sea slop. Our results suggest that geographical features such as slope and polymetalic nodule deposits are important in controlling the distribution of the epifaunal megabenthos around the KODOS area.