• Animal Systematics, Evolution and Diversity
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• 제27권2호
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• pp.197-200
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• 2011

Tunicates were collected from three harbors (Gampo, Bangeojin, Daebyeon) in Gyeongsangnam-do and one harbor (Seogwipo) in Jejudo Island during the period from August 2008 to January 2011 and were identified on the basis of their morphological characteristics. Among them, colonial tunicate Clavelina lepadiformis (Muller, 1776) belonging to the family Clavelinidae was found to be an invasive alien species introduced from the North Atlantic, and this is the first record of its occurrence in Korea.

• Natural Product Sciences
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• 제21권4호
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• pp.278-281
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• 2015

Chemical investigation on a colonial marine tunicate, Didemnum sp. led to the isolation of a series of indole alkaloids including a new (1) and two known metabolites (2-3). Based on the spectroscopic analysis including 1D and 2D NMR along with MS spectra, the structure of 1 (16-epi-18-acetyl herdmanine D) was elucidated as a new amino acid derivative. The absolute configuration of 1 was determined by comparison of specific rotation with the known compound. The structures of compounds 2 and 3 were also identified as bromoindole containing compounds N-(6-bromo-1H-indole-3-carbonyl)-L-arginine and (6-bromo-^1H-indol-3-yl) oxoacetamide, respectively, based on $^1H$ and $^{13}C$ NMR data, MS data and specific rotation value. Their pharmacological potentials as antibacterial agents and FXR antagonists were investigated, but no significant activity was found. However, the structural similarity of compound 1 to compound 4 suggested the anti-inflammatory potential of compound 1.

• 한국수산과학회지
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• 제13권2호
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• pp.57-64
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• 1980

우렁쉥이, Halocynthia roretzi (V. DRASCHE)가 서식하지 않는 서해안 고군산열도의 선유도와 어청도 구성에 충무산 우렁쉥이 종묘를 이식하고, 1978년 4월부터 1979년 3월까지 333일에 걸쳐 이식후의 성장과 해양환경의 가능성에 대하여 검토 하였다. 1. 이식당시의 평균 체고 1.84mm, 체폭 1.42mm 체중 15.0mg이 이식후 만 333일만에 선유도구역은 평균 체고 10.77mm, 체폭 6.75mm, 체중 201mg의 아주 낮은 성장을 보였으나, 어청도구역은 체고 13.5mm, 체폭 11.51mm, 체중 880mg으로 성장되는 종묘 양성장으로 가능하다. 2. 연간 수온의 변동범위는 $6.8\~26.8^{\circ}C$로써 우렁쉥이 서식에는 제한되지 않았으나, $26.8^{\circ}C$인 7월은 성장이 아주 늦었다. 3. 염분은 $29.2\~32.0\%_{\circ}$로써 우렁쉥이 종묘의 서식에 영향이 없었다. 4. 1.0m이하의 낮은 투명도는 성장에 영향을 크게 주는 요인이었다. 5. 선유도구역은 주로 흰덩이멍게와 부이가 다량 착생되어 우렁쉥이 종묘의 표면을 덮으므로 체고는 신장되고 체중 및 체폭은 감소되어 폐사하는 개체가 많아 우렁쉥이 종묘 양식장으로는 부적당하다.

• Animal Systematics, Evolution and Diversity
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• 제39권1호
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• pp.10-15
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• 2023

Two pelagic thaliacean tunicates, Pyrosoma atlanticum and Cyclosalpa quadriluminis, with bioluminescent organ, were collected from Jejudo Island and Korea Strait. In this study, the Pyrosomatida, which is holoplanktonic colonial tunicate with ascidiozooids embedded in a common test, and to which P. atlanticum belongs, is reported for the first time in Korea. The Cyclosalpa in the Salpida has a bar-shaped alimentary canal beside the branchial bar in both oozooids and blastozooids. Cyclosalpa quadriluminis is added to make Cyclosalpa species in Korea from four to five (C. affinis, C. bakeri, C. polae, C. sewelli, and C. quadriluminis). As a result of this study, 27 species of thaliaceans have been reported from Korea.