• 한국동물학회지
• /
• 제25권3호
• /
• pp.131-148
• /
• 1982

한국산 六放珊瑚類의 계통분류학적 연구를 하기 위하여 1969년 12월부터 1981년 7월까지 남한의 16개지역 (동해, 남해, 황해연안과 도서지방)으로부터 채집된 표본들을 동정분류한 결과 다음과 같은 돌산호類에 속하는 5亞目 6科 11屬 17種을 얻었다. 이들은 모두 韓國未記錄種이며 다음과 같다. Psammocora profundacella, Alveopora japonica, Culicia japonica, Caryophyllia japonica, Cyathoceras niinoi, Heterocyathus aequicostatus, H. japonicus, Stephanocyathus (Odontocyathus) spiniger, Desmophyllum insignis, Flabellum distinctum, F. rubrum, F. transversale, Dendrophyllia boschmai, D. cribrosa, D. florulenta, Tubastraea aurea 및 T. coccinea.

• Journal of Microbiology
• /
• 제40권2호
• /
• pp.161-165
• /
• 2002

Isolation frequency of microorganisms from marine sources was examined with different media and samples collected from the coastal area of Cheju Island. From sea water samples, about 1% of microorganisms from the total number of bacteria were recovered. Microorganisms were cultured at the much lower frequency of 10$\^$-4/-10$\^$-6/ from other marine sources such as sediment, sponges and corals. The frequency of duplicated isolation was examined with 140 morphologically different colonies isolated on different media. Fourteen percent of them exhibited the same morphology on two different media. The duplication frequency of the isolates among three different media was 33%.

• The Korean Journal of Ecology
• /
• 제20권2호
• /
• pp.111-123
• /
• 1997

Although the number of active workers in Australia is small the range of species associated with allelopathic activity is at least as large as that reported elsewhere in the world. In this paper, work on native and infroduced plants is discussed under the general heading of "conventional allelopathy", thiat is, interactions between plants which are chemically mediated. Work in which compounds associated with allelopathy, in the conventional sense, are biologically active in different contexts is included under "unconventional allelopathy", Examples which involve microorganisms, corals and other marie species, and mammals are discussed.mmals are discussed.

• Animal Systematics, Evolution and Diversity
• /
• 제25권1호
• /
• pp.133-136
• /
• 2009

A ctenostomatous bryozoan, Bantariella bocki is reported from Jejudo Island of South Korea. This is the first report from Korean waters. Each zooid is produced from each kenozooid which arranged in two and originated opposite each other at intervals of about 0.64 mm along the stolon. B. bocki collected from black corals is considered to be a invasive species introduced from Bonin Islands located in the subtropical waters. The redescription, some distributional remarks and illustrations of B. bocki are provided.

• 대한원격탐사학회지
• /
• 제37권4호
• /
• pp.687-698
• /
• 2021

We present quantitative estimations of changes in the areal extent of coral reef habitats at Weno Island, Micronesia, using high-spatial-resolution remote sensing images and field observations. Coral reef habitat maps were generated from Kompsat-2 satellite images for September 2008 and September 2010, yielding classifications with 78.6% and 72.4% accuracy, respectively, which is a relatively high level of agreement. The difference between the number of pixels occupied by each seabed type was calculated, revealing that the areal extent of living corals decreased by 8.2 percentage points between 2008 and 2010. This result is consistent with a comparison of the seabed types determined by field observations. This study can be used as a basis for remediation planning to diminish the impact of changes in coral reefs.

• Animal Systematics, Evolution and Diversity
• /
• 제39권2호
• /
• pp.61-66
• /
• 2023

Through a taxonomic study on solitary corals collected from subtidal zones of South and East Seas from 2019 to 2022, Paracyathus rotundatus, an unrecorded species belonging to family Caryophylliidae, is newly added to the anthozoan fauna of Korea. In addition, comparing partial 16S rRNA sequences with a length of 269 bp according to color variation clarified that there were no sequence differences among specimens with color variation, indicating that the color variation is due to intraspecific variation. As a result of this study, a total of 7 genera and 8 species belonging to the Caryophylliidae family have been reported in Korean waters so far.

• 한국지구과학회지
• /
• 제21권3호
• /
• pp.337-348
• /
• 2000

강원도 태백 일대에 분포하는 중기 석탄기의 만항층과 금천층은 주로 셰일, 사암 및 석회암으로 구성되며, 이 층들의 석회암에서 코노돈트, 방추충, 해백합, 완족류, 산호, 태선동물, 개형충 등이 풍부하게 산출된다. 이 연구는 연구 지역의 만항층과 금천충의 석회암 암상을 조사하고 이들 석회암에서 산출되는 코노돈트의 종류와 수를 조사하여 코노돈트의 고생태를밝혔다. 또한, 만항층과 금천층에서 산출되는 여러 종류의 화석을 바탕으로 이들의 퇴적환경을 구명하였다. 연구 지역에 분포하는 만항층과 금천층의 석회암은 해백합과 여러 종류의 생물 파편을 많이 포함한 와케스톤(wackestone)과 팩스톤(packstone)으로 구성된다. 특히, 금천층 일부 석회암 내에서는 따뜻한 천해환경을 지시하는 Chaetetes산호화석이 발견된다. 연구 지역의 석탄계에서 발견된 코노돈트는 6속 12종이며, 이들 코노돈트는 대부분 생물 파편을 많이 포함한 팩스톤이나 와케스톤에서 많이 산출된다. 만항층 석회암에서는 Neognathodus bothrops, N. medexultimus, Hindeodus minutus, Diplognathodus coloradoensis, D. edentulus, Idiognathodus delicatus, Streptognathodus elegantulus, S. sp. 등이 산출되며, 금천층의 석회암에서는 Neognathodus medexultimus, N. roundyi, N. dilatus, Gondolella bella, Diplognathodus coloradoensis, D. edentulus, Hindeodus minutus, Idiognathodus delicatus, and Streptognathodus elegantulus 등의 코노돈트가 산출된다. 이들 코노돈트 중 Hindeodus minutus, Diplognathodus coloradoensis, D. edentulus, 등은 얕은 바다에서 생성된 석회암에서 산출되는 종들이다. 따라서 연구 지역의 만항층과 금천층 석회암의 암상과 이들 석회암에서 산출되는 코노돈트는 이들 석회암이 해수의 순환이 좋은 얕은 바다에서 퇴적되었음을 지시한다.

• 한국어류학회지
• /
• 제11권1호
• /
• pp.42-45
• /
• 1999

놀래기과 어류 Cheilinus bimachulatus의 산란 행동을 조사하기 위해 1997년 7월과 8월 두달에 걸쳐 일본(日本) 녹아도(鹿兒島)의 침기(枕崎)에서 수중 관찰 및 video 촬영을 하였다. C. bimaculatus의 mating system은 haremic이었다. 본 종의 수컷은 수중의 커다란 바위 또는 연산호의 덤불을 중심으로 짝짓기를 위한 세력권을 형성하였고 자신의 세력권 내에 2~3마리의 암컷을 거느렸다. 암컷은 수컷의 세력권 안에서 작은 바위 또는 연산호의 덤불을 중심으로 작은 세력권을 형성하였다. 오후 3시부터 3시30분 사이에 수컷은 자기 세력권 내의 암컷과 차례차례 산란하였다. 방란, 방정을 하기 전에 특유의 산란 행동을 하였다. 본 연구에서 streaking, sneaking 및 group spawning은 관찰되지 않았다.

• 한국지구과학회지
• /
• 제39권1호
• /
• pp.67-88
• /
• 2018

The important PH (paleontological heritages) with scientific, educational and esthetic values designated as natural monuments and protected by legislations of South and North Koreas are herein compared for the first time. On the basis of data (Jan. 2017) provided by the Cultural Heritage Administration of (South) Korea, a total of 457 natural monuments was designated. Of these, geological heritages are 80 in number, which includes 24 (30%) PH. Data (Dec. 2005) of North Korea show that a total of 474 natural monuments was designated. Among these, geological and geographical ones are 154 in number, which includes 22 (14%) PH. Differences between PH of South and North Koreas are regarded to be directly related with geological difference in distribution of the fossil-bearing strata between South and North Koreas. PH of Silurian corals, Devonian plants, Jurassic fishes, Cretaceous dinosaur tracks, birds (so called Korean Archaeopteryx) and pterosaurs, and Pleistocene paleoanthropological fossils appear to be scientifically significant. Together with these North Korean PH, scientific, esthetic, conservational, educational, and economical values of important PH including KCDC (Korean Cretaceous Dinosaur Coast), Jigunsan Shale, and Geumgwangdong Shale of South Korea should be evaluated as potential future candidates for international heritages.

• Animal Systematics, Evolution and Diversity
• /
• 제24권3호
• /
• pp.327-332
• /
• 2008

Soft coral Dendronephthya gigantea (Verrill, 1864) is a conspicuous species dominating shallow sea waters of Jejudo Island, Korea. Recently its whole mitochondrial genome sequencing was completed by us and the sequence information provided an opportunity to test the age of Octocorallia and time of evolutionary separation between some representative orders of the subclass Octocorallia. Molecular phylogenetic analyses based on 13 mitochondrial protein encoding genes revealed a polyphyletic relationship among octocorallians representing two orders (Alcyonacea and Gorgonacea) and four families (Alcyoniidae, Nephtheidae, Briareidae, and Gorgoniidae). Estimates of divergence times among octocorallians indicate that the first splitting might occur around end of or after Cretaceous period (50-79 million years ago (Ma)). The age is relatively young compared to the long history of stony sea corals (>240 Ma). Taken together our result suggests a possible relatively recent radiating evolution at least in the order Alcyonacea and Gorgonacea. Molecular dating and phylogenetic analysis based on much broader taxon sampling and many genes might give an insight into this interesting hypothesis.