• Animal Systematics, Evolution and Diversity
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• 제22권1호
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• pp.57-62
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• 2006

Some scyphomedusae were collected from the coasts of Ilgwang, Jeju Harbour, Yeosu, Yokjido Is. and Munyeodo Is. in Korea from May to Nov. 2004. They were indentified into Pelagia noctiluca Forskal, 1775 and Cyanea nozakii Kishinouye, 1891 of the order Semaeostomeae and Nemopilema nomurai Kishinouye, 1922 of the order Rhizostomeae in the class Scyphozoa. They are new to the Korean fauna.

• 한국해양학회지:바다
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• 제8권2호
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• pp.199-202
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• 2003

하계 한국남해안에서 보름달물해파리(Scyphozoa: Ulmariidae: Aurelia aurita)의 월별 출현 및 크기와 중량간의 상관성을 연구하였다. 또한 Rotifer와 Artemia sp.를 먹이생물로 하여 먹이섭취 습성을 분석하였다. 보름달물해파리는 크기와 중량간에 상관성이 매우 높았으며 (r=0.930, P<0.001), 6월에는 크기가 6∼9 cm, 7월에는 7∼16 cm, 8월에는 16 cm인 개체가 우점하였다. 먹이섭취율은 크기와 먹이농도에 따라 유의한 차이가 있었다(ANOVA test: P<0.001).

• Animal Systematics, Evolution and Diversity
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• 제18권1호
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• pp.53-58
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• 2002

후포의 연안에서 채집된 푸른우산관해파리 (Porpita umbella)와 거제도의 연안에서 채집된 커튼원양해파리(Dactylometra quinquecirrha)가 각각 한국 미기록종으로 판명되어 재기재하여 보고한다. 푸른우산관해파리의 부유기는 연한 갈색의 둥글고 납작한 단추 모양이고 촉수, 개충 그리고 우산의 테두리는 푸른색을 띤다. 커튼원양해파리는 긴 커튼과 같은 신축성 있는 4개의 구엽을 가지고 있다. 관해파리류는 우리나라에서 처음 보고되고 해파리류는 본 연구 결과 3종이 보고된다.

• Ocean Science Journal
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• 제43권1호
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• pp.61-65
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• 2008

Feeding apparatus, mechanism and passage of ingested prey were described for Nemopilema nomurai (Scyphozoa: Rhizostomeae). N. nomurai medusae without central mouths have developed complicated canal systems connecting the tip of the tentacle and oral arm to the gut cavity. The number of junctions in the canal system increases with the bell diameter. The prey is gathered by paralyzing nematocyst at the tentacles and by adhering cirri at the oral arms and scapulets. They are engulfed into the terminal pore located at the oral arms and scapulets, and entered into the gut cavity via the canal system. The estimated digestion time is 1 hour and 20 min. The diameter of terminal pore is always about 1 mm, implying that they could not eat prey larger than that pore size. On the other hand, ephyrae have central mouths and could swallow prey as large as adults could. Exploitation of the same size of food by adult and ephyra implies that N. nomurai can affect seriously the whole food web, massively ingesting micro- and mesozooplankton and cutting the energy transfer toward the higher level of carnivores.

• Animal Systematics, Evolution and Diversity
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• 제16권1호
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• pp.79-85
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• 2000

부산(기장), 거제도(장목리) 및 삼척에서 1989년 6월부터 1999년 5월까지 채집한 해파리는 십자해파리목(Stauromedusae)의 좁은컵해파리(Stenoscyphus inabai)와 기구해파리목(Semaeostomeae)의 보름달물해파리(Aurelia aurita)로 동정 분류되었다. 이들은 우리 나라 해역에서 처음으로 보고된다.

• Animal Systematics, Evolution and Diversity
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• 제32권4호
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• pp.272-280
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• 2016

Most scyphomedusae jellyfishes recorded in Korean waters are temperate and subtropical species. In the present study, two cold-water jellyfishes from Korean waters are first described. Scyphomedusae were collected from the coasts of Gangneung and Ulsan of the East Sea, and Boryeong, and the eastern area of the Yellow Sea from June 2006 to May 2015. Scyphomedusae collected in Ulsan and Gangneung were identified morphologically as Aurelia limbata Brandt, 1835. Their umbrella was 250-500 mm in width and 30-50 mm in height; the exumbrella was white and the subumbrella was dark brown in color. The vascular system was complex with anastomosed branches. Individuals of this species lived at about 6.6-9.9℃ and 30-50 m depth in Korean waters. Scyphomedusae collected from the center of the Yellow Sea and from Boryeong were identified as Parumbrosa polylobata Kishinouye, 1910. Their umbrella was disc-shaped, 80-200 mm in width and 20-40 mm in height. Its milky white gonads could be seen through the transparent exumbrella. The stomach cavity was round and flat with four interradial cavities connected by subgenital cavities, and the four oral arms were bifurcated and spear-head shaped. Individuals were found at about 6.4-10.0℃ and 40-90 m depth in Korean waters. The identities of both species were confirmed by molecular analysis using nuclear ribosomal DNA sequences.

• Ocean and Polar Research
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• 제37권4호
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• pp.287-293
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• 2015

A species of edible Scyphomedusae jellyfish has been used as food by the local people in Ganghwado, Korea since the 1990s. In order to identify this jellyfish, we collected specimens in Ganghwado during September 2013, and compared these specimens with original descriptions made by Kishinouye (1890). Mitochondrial cytochrome oxidase subunit 1 (CO1) sequences of these specimens were compared with those of Rhopilema esculentum retrieved from GenBank. Our specimens were also compared with jellyfish collected in China, previously confirmed as R. esculentum, based on morphological characters and DNA sequences. Using these two methods, the jellyfish specimens caught in Ganghwado were correctly identified as R. esculentum, a species new to Korean waters. This edible jellyfish has been named 'Gisusik-Yonghaepari' as Korean name.

• Ocean and Polar Research
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• 제38권4호
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• pp.295-301
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• 2016

The nomenclature of the sea nettle jellyfish from Korea was initially described as Dactylometra quinquecirrha Agassiz, 1862. However its identity has been questioned on the basis of its local distribution and molecular data. Here, we examined morphology and DNA sequences of nuclear rDNA using specimens collected from southern Korean waters in August 2014. Based on morphological characteristics (bell size, umbrella pattern, number of tentacles and lappets) and distribution locality, we reassign the Korean D. quinquecirrha to Chrysaora pacifica (Goette, 1886), and provide a re-description accordingly. The molecular identity of C. pacifica was further confirmed by comparison of nuclear ribosomal DNA sequences.

• Animal Systematics, Evolution and Diversity
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• 제39권4호
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• pp.264-271
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• 2023

The edible jellyfish Rhopilema esculentum occurs in waters throughout northeastern Asia, including in Korea, China, and Japan. In Korean waters, R. esculentum has appeared in two regions (Gangwha and Muan). Based on the appearance of young medusae and coastal distribution records, these two regions may be key R. esculentum breeding sites. In the present study, we investigate and compare the genetic structure of R. esculentum in the two regions using mitochondrial sequences (16S ribosomal RNA and cytochrome c oxidase subunit I). The genetic diversity of the R. esculentum population at Ganghwa exceeded that of the population at Muan. Despite considerable geographic separation (400 km) between the two regions(Gangwha and Muan), our haplotype network suggests that the Gangwha and Muan populations of R. esculentum are related. The simple and monotonous genetic structure of the Muan population shows that R. esculentum emergence is relatively recent. In contrast, the Gangwha population shows evolution. Moreover, jellyfish of the Gangwha population are genetically diverse and remain constant despite environmental fluctuations in the Han River. The Gangwha area is considered to be the old origin of R. esculentum in Korea.