• Proceedings of the Malacological Society of Korea Conference
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• 2000.11a
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• pp.46-46
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• 2000

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.209-210
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• 2003

우리나라 연안에서 쉽게 발견되는 불가사리는 양식대상 패류의 성패와 치패를 포식함으로써 패류양식장에 큰 피해를 끼치는 대표적인 해적생물이다. 이들은 저질의 상태와 상관없이 어디에나 분포하고 번식력과 재생력이 강하여 그 숫자 또한 많기 때문에 특정 양식장뿐만 아니라 연안생태계 파괴의 주범이라고 할 수 있다. 이와 관련하여 불가사리에 관한 기존 논문을 보면 국내의 경우 강 등(2000)이 양식패류에 대한 불가사리 종류별 포식특성에 관한 연구 등이 있을 뿐으로 불가사리의 산란이나 난발생 및 유생사육시 환경요인에 대한 논문을 찾아 보기 어렵다. (중략)

• Development and Reproduction
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• v.10 no.1
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• pp.33-39
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• 2006

Gonadal development and reproductive cycle of the North Pacific seastar, Asterias amurensis captured from the Gosung, Gyeongsangnamdo, between November 2003 and February 2005, was investigated monthly changes of gonadosomatic index(GSI), gonadal development and oocyte size-frequency distribution. Monthly changes of GSI values showed similar trends in female and male. GSI values were reached the maximum in March($3.88{\pm}3.04$ in female, $0.87{\pm}0.57$ in male), and then gradually decreased. Based on the monthly changes of GSI, histological observation of gonadal development, reproductive cycle was divided into following successive stage: growing stage(October to January), mature stage(February to March), spent stage(March to April), degeneration and resorption stage(April to May), recovery stage(July to September). based on these result, this species seemed to have a synchronous oocyte development and one spawning season a year.

• Journal of Life Science
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• v.24 no.5
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• pp.491-497
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• 2014

Nowadays, starfish is one of problems about interruption of marine ecosystem, so many researchers are focusing on application of the starfish (Asterias amurensis). In this study, we investigated the contractile and relaxant activity of the smooth muscles and the antimicrobial and antioxidant activity of six different tissues (muscle, gut, liver, tube feet, gonads, and body) of A. amurensis. Frozen samples were extracted with distilled water containing 1% acetic acid. Extracts from all the tissues, except the body tissue, showed potent antimicrobial activity against Escherichia coli D31. The dorsal retractor muscles (DRM) of muscle and gut extracts showed strong contraction responses. On the other hand, contractile activity on esophagus of squid Todarodes pacificus could be detected in all tissues tested. The contractile activity of the liver extract was higher than that of the other tissues. The body, tube feet, and liver extracts showed the contractile activity on the intestine of the panther puffer fish (Takifugu pardalis). Relaxation response on the DRM of starfish (A. pectinifera) was observed in all tissues tested. Increased antioxidant activity was observed in the gut, liver, and body extracts. The results suggest that the starfish (A. amurensis) is a potential source of novel bioactive compounds.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.47 no.2
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• pp.129-134
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• 2014

Two neuropeptides were purified from the acidified tube feet extract of the starfish Asterias amurensis by C18 reversed phase and size-exclusion high-performance liquid chromatography (HPLC). The tube feet extract and the purified peptides (AST-I and AST-II) showed potent contractile activity on dorsal retractor muscle (DRM) of the starfish Asterina pectinifera and intestine (smooth muscle) of the panther puffer Takifugu pardalis. Treatment of the purified peptides with dithiothreitol (DTT) for 60 min at $37^{\circ}C$ significantly altered their retention times, suggesting that these compounds contained disulfide bonds. The molecular weights of AST-I and AST-II were determined to be 2064.2 Da and 6137.2 Da, respectively, by MALDI-TOF mass spectrometry.