자극원에 따른 보라성게(Heliocodaris crassispina)의 이동패턴 분석

오태건,이정관,황학진,편용범,한인우,오우석,박근창,이경훈 한국수산과학회 2019 한국수산과학회지 Vol.52 No.5

Sea urchins are hugely destructive of marine forest ecosystems. This study aimed to determine the behavioral response of purple sea Urchins Heliocodaris crassispina to food and an electrical stimulus and to investigate the attraction radius of these stimuli, with an eye to the development of technology for controlling sea urchin numbers. Ten purple sea urchins, housed in circular acrylic tank, were tested against various attractant stimuli. In addition, an experiment was conducted with 200 purple sea urchins in a large water tank to observe movement patterns and the attractiveness of various stimuli. In the smaller experiment, eight out of 10 sea urchins were attracted to food, and these attractive effects were maintained in all except one of the affected urchins. However, the attractant effects of the electrical stimulus were maintained in only three sea urchins. The results of the larger experiment indicated that differences in the attractant power of food and an electrical stimulus were 54%-78%, and approximately 5-15% of sea urchins were attracted by the electrical stimulus.

Formation of Bi-Containing sea urchin-like Pt nanoparticles induced by the addition of bismuth element and their enhanced electrocatalytic properties for methanol oxidation

Lee, Kang Yeol,Lee, Young Wook,Kim, Tae Ho,Kim, Jineun Elsevier 2019 Materials chemistry and physics Vol.235 No.-

<P><B>Abstract</B></P> <P>A facile method to synthesize Bi-containing sea urchin-like Pt nanoparticles is demonstrated. The morphology and chemical composition of the prepared Bi-containing sea urchin-like Pt nanoparticles were characterized using scanning electron microscopy, X-ray diffraction, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. Electrochemical studies of the oxidation of methanol in an acidic medium using the Bi-containing sea urchin-like Pt nanoparticles were performed. The prepared nanoparticles exhibited enhanced electrocatalytic activity for methanol oxidation with a seven-fold higher oxidation current density and a more negative onset potential than commercial Pt/C (Pt 20%). Moreover, the current density of the Bi-containing sea urchin-like Pt nanoparticle/C catalysts was high even after 900 s of continuous electrocatalysis at 0.56 V. The synthesized Bi-containing sea urchin-like Pt nanoparticles should find attractive applications in various fields, such as fuel cells, sensors, and eletro- or organic catalysis.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We have demonstrated a method for the synthesis of Bi-containing sea urchin-like Pt nanoparticles. </LI> <LI> Bi-containing sea urchin-like Pt nanoparticles are excellent electrocatalysts for MeOH oxidation. </LI> <LI> Bi-containing sea urchin-like Pt nanoparticles show enhanced electrocatalytic activity and stability. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

성게 부위별 및 그 추출물의 간 해독과 항산화 활성 효과

이승주,하왕현,최혜진,조순영,최종원 한국수산과학회 2010 한국수산과학회지 Vol.43 No.5

Sea-urchins (Anthocidaris crassispina) are widely distributed in the East Sea of Korea. The aim of this study was to evaluate the hepatoprotective effects of sea-urchin roe on bromobenzene (BB)-induced liver damage in rats. The antioxidative and detoxifying properties of sea-urchin roe in BB-poisoned rat liver was examined by chemical analysis of serum aminotransferase (AST, ALT), glutathione S-transferase (GST), γ-glutamylcystein synthetase, glutathione reductase, epoxide hydrolase, amino-N-demethylase (AD), aniline hydrolase (AH) enzyme activity, as well as lipid peroxide and glutathione contents. Sea-urchin roe inhibited the increase of serum AST, ALT enzyme activity. Increasing lipid peroxide contents and AD and AH activities were significantly decreased in ethanol extract of sea-urchin roe. GST, γ-glutamylcystein synthetase, glutathione reductase and epoxide hydrolase enzyme activities increased in sea-urchin roe-fed group, compared with the BB-treated group. These results suggest that sea-urchin roe facilitates recovery from liver damage by enhancing antioxidative defense mechanisms and hepatic detoxication metabolism.

적응적 경계 검출을 이용한 성게의 특징점 추출

전영철(Young Cheol Jeon),우영배(Young Bae Woo),최철재(Chul Jae Choi) 한국전자통신학회 2017 한국전자통신학회 논문지 Vol.12 No.1

동해안의 갯녹음 현상이 현재 진행 중이며 심화한 암반의 면적이 170.54㎢로 동해안 전체 암반 면적의 61.7%에 달하는 것으로 나타났다. 갯녹음의 주원인이자 패류 양식어장에 크게 피해를 주는 것으로 알려진 성게의 퇴치 방법은 지속적으로 연구되어 왔으나 성게를 이용한 음식이나 재활용에 대한 연구가 주를 이루며 아직 성게 인식에 대한 연구는 이루어지지 않고 있다. 이에 본 연구는 바다의 해적인 성게를 대량으로 포획하기 위하여 성게의 특징점 추출을 위한 적응적 경계검출을 제안하였으며 향후 성게 인식프로그램에 많은 도움이 되리라 생각한다. The albinism phenomenon of the East Sea is now in progress, and the area of the intensified bedrock has reached up to 61.7% of the whole bedrock area of the East Sea. The methods to eradicate the sea urchin that is known as the main cause of albinism and that influences huge damage on the selfish farm have been continuously studied but they have focused on the food using the sea urchin and recycling and the research on the recognition of the sea urchin has not been performed yet. Therefore, this study suggested the adaptive boundary detection to extract the characteristics of the sea urchin in order to catch the sea urchin in quantity that is the pirate of the sea, and it is believed to help the sea urchin recognition program a lot in the future.

Changes in macroalgal assemblage with sea urchin density on the east coast of South Korea

Byung Hee Jeon,양권모,김정하 한국조류학회I 2015 ALGAE Vol.30 No.2

Urchin barrens have been a major issue of rocky coastal ecosystems in temperate regions. In South Korea, the east coast and Jeju Island have especially been a focus because the area of barren ground increases in spite of continual efforts to install artificial reefs. This study approached the urchin barrens issue in South Korea, by focusing on a correlational analysis of urchin and macroalgal abundance. Urchin density and algal species coverage were obtained using a quadrat image analysis. Subtidal sites were then classified into three groups according to the average densities of urchins to evaluate the characterization of the macroalgal community: no urchin (NU) zone; transition (TR) zone, 4 inds. m-2; and urchin (UR) zone, ≥8 inds. m-2. The average urchin density in the study site was 4.7 inds. m-2 and 57 macroalgal species were found in the study site. From the NU zone to UR zone, total species number, species diversity index and evenness gradually decreased, whereas the dominance index increased. The algae species with negative correlations were Grateloupia divaricata, Polysiphonia morrowii, Chondracanthus intermedius, Delesseria violacea, Desmarestia viridis; and those with positive correlations were the crustose corallines, Sargassum horneri. Other species were not significantly correlated with urchin density. The significant correlations indicate that the abundance of some macroalgal species is proportionally regulated by sea urchin density. This study also shows how macroalgal vegetation changes in response to an urchin’s density gradient in a natural condition; and there is a TR zone that existed with respect to an intermediate level of algal abundance.

Changes in macroalgal assemblage with sea urchin density on the east coast of South Korea

Jeon, Byung Hee,Yang, Kwon Mo,Kim, Jeong Ha The Korean Society of Phycology 2015 ALGAE Vol.30 No.2

Urchin barrens have been a major issue of rocky coastal ecosystems in temperate regions. In South Korea, the east coast and Jeju Island have especially been a focus because the area of barren ground increases in spite of continual efforts to install artificial reefs. This study approached the urchin barrens issue in South Korea, by focusing on a correlational analysis of urchin and macroalgal abundance. Urchin density and algal species coverage were obtained using a quadrat image analysis. Subtidal sites were then classified into three groups according to the average densities of urchins to evaluate the characterization of the macroalgal community: no urchin (NU) zone; transition (TR) zone, $4inds.\;m^{-2};$ and urchin (UR) zone, ${\geq}8inds.\;m^{-2}$. The average urchin density in the study site was $4.7inds.\;m^{-2}$ and 57 macroalgal species were found in the study site. From the NU zone to UR zone, total species number, species diversity index and evenness gradually decreased, whereas the dominance index increased. The algae species with negative correlations were Grateloupia divaricata, Polysiphonia morrowii, Chondracanthus intermedius, Delesseria violacea, Desmarestia viridis; and those with positive correlations were the crustose corallines, Sargassum horneri. Other species were not significantly correlated with urchin density. The significant correlations indicate that the abundance of some macroalgal species is proportionally regulated by sea urchin density. This study also shows how macroalgal vegetation changes in response to an urchin's density gradient in a natural condition; and there is a TR zone that existed with respect to an intermediate level of algal abundance.

동해안 삼척 호산에 서식하는 둥근성게 Strongylocentrotus nudus의 분포와 피식 패턴

유재원,손용수,이창근,김정수,한창훈,김창수,문영봉,김동삼,홍재상 한국해양학회 2004 바다 Vol.9 No.1

An ecological study on a sea urchin population, Strongylocentrotus nudus, a key role species in recovery of macroalgal bed, was conducted in Hosan, Samcheok area on the east coast of Korea. Three experimental plots, namely, AMB (artificially-restored macroalgal bed), BG (barren grounds) and NMB (natural macroalgal bed) were established after a pilot survey in June 2002. Distribution and abundance, grazing rates, predation pressure and predator guilds on S. nudus were estimated in three plots bimonthly from Aug. to Dec., 2002. Abundance of S. nudus was lowest, but median test diameter of the urchin was highest (Kruskal-Wallis test, p-value, p<0.001 in Aug. and p=0.003 in Oct.) in NMB In-situ grazing rate of S. nudus estimated by enclosure cage experiment in NMB was about 12 times higher in Aug. (160.0 mg seaweed/g sea urchin/day) than in Oct. (13.8). Predation intensity measured by tethering experiment was higher in NMB. Most of the predators on S. nudus were invertebrates and no fish predators were found. Predator guilds identified by the fish trap experiment using live or dead sea urchins included who]ks Neptunea arthritica, starfish Asterina pectinifera, hermit crabs Pagurus of. samuelis, Paguristes barbatus, brown shawl crabs Atergatis integerrimus and crabs Actaea subglobosa. High predation pressure on S. nudus in natural macroalgal beds was the likely cause of its low density. Elevated sea urchin density and the consequent lasting deforestation of macroalgae in barren grounds demonstrate the importance of predation pressure on sea urchins. 강원도 삼척 호산해역에서 해조장의 회복에 결정적 역할을 할 것으로 짐작되는 둥근성게(Strongylocentrotusnudus) 개체군에 대한 생태학적 연구를 수행하였다. 2002년 6월의 예비연구를 통해 조하대에 3개 실험구(인공해조장. 갯녹음지역, 자연해조장)를 설정하고, 8월, 10월, 12월에 둥근성게의 분포와 섭식률, 포식압, 포식자 조합을 추정하였다. 둥근성게의 서식 밀도는 자연해조장에서 가장 낮았으나, 각경(test diameter)의 중위수는 가장 큰것(Kruskal-Wallis test, 8월, p<0.001; 10월, p=0.036)으로 나타났다. 둥근 성게의 먹이 섭식률을 추정하기 위한 실험(enclosure cage experiment)은 자연해조장에서 수행되었으며, 8월과 10월에 각각 160, 13.8 mg seaweed/g sea urchin/day로 추정되었다. 둥근성게에 대한 상대적인 포식압의 실험구 간 비교를 위해 수행된 포박실험 (tethering experiment)으로부터 자연해조장의 포식압이 다른 두 실험구에 비해 상대적으로 높은 것으로 나타났다. 실험 도중 현장에서 관찰된 포식자는 대부분 무척추동물인 것으로 나타났으며 어류 포식의 증거는 찾을 수 없었다. 죽은 성게나 산 성게를 담은 통발을 이용하여 포식자 조합을 파악하기 위한 실험을 하였다. 둥근성게의 포식자는 복족류 Neptuned arthritica와 별불가사리 Asterina pectinifera, 집게류 Pagurus cf. samuelis, 그리고 게류에 속하는 Atergatis integerrimus 등이며, 집게류인 Paguristes barbatus와 게류인 Actaea subglobosa도 가능성이 있는 포식자인 것으로 추정되었다 실험구 간 대비되는 관찰 결과로부터 (1)성게의 낮은 서식 밀도와 관련된 요인은 포식압이며, (2) 이는 조사 해역의 백화 현상의 발생, 유지와 낮은 포식압 간 가능한 상관관계를 제시하는 것으로 해석되었다.

국내 주상용 Anti-Fouling System 처리 활성물질이 둥근성게 (Mesocentrotus nudus)의 배아에 미치는 영향

서진영,강정훈,최진우 한국환경생물학회 2019 환경생물 : 환경생물학회지 Vol.37 No.3

In this study, we aimed to assess the toxicity of biocide present in antifouling paint on embryos of sea urchin, Mesocentrotus nudus. Three types of biocide (Sea-nine 211, Diuron, and Irgarol 1051) were selected for the exposure experiment. The EC50 of Seanine, Diuron, and Irgarol on the fertilization rate of sea urchin were 32.8 μg L-1, 7,975 μg L-1 and 6,995 μg L-1, respectively. The EC50 of Sea-nine, Diuron, and Irgarol on the development rate of sea urchin were 31.6 μg L-1, 3,044 μg L-1, and 2,267 μg L-1, respectively. The highest toxicity was observed in the presence of Sea-nine. 본 연구는 둥근성게 (Mesocentrotus nudus)의 배아를 이용하여 전 세계적으로 많이 이용되고 있는 살생물제 (Biocides)에 대한 독성 평가를 수행하였다. 실험에 사용한 살생물제는 총 3종, Sea-nine 211, Diuron, Irgarol 1051이었다. 그 중, 둥근성게 (M. nudus)의 수정과 발생률에 미치는 영향은 모두 EC50을 기준으로 보았을 때, Sea-nine의 독성이 가장 강한 것으로 나타났고, Irgarol, Diuron의 순으로 나타났다. 이러한 살생물제, 특히 Sea-nine은 해양무척추동물의 초기 발생과정과 유생의 성장과정에 치명적인 영향이 있는 것으로 알려져 있으므로 이 물질들에 대한 관리가 필요할 것으로 판단된다.

해녀에서 발생한 성게육아종 1례

전영승,김상태,서기석 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.4

Some aquatic animals can cause important skin diseases in humans. Sea urchin granuloma is a rare skin disorder showing chronic granulomatous lesion caused by injury with sea-urchin spines. Sometimes patients were injured in fishing activities and among them, correspond to divers involved in sea-urchin harvesting. We report a case of sea-urchin granuloma in 67-year-old female, who presented with multiple erythematous pin-head to rice-grain sized papules on the both elbow and knee.

Enhanced photocatalytic activity of sea-urchin-like carbon/ZnO micro/nano heterostructures

He, Wen,Van Ngoc, Huynh,Kang, Dae Joon Elsevier 2018 Journal of photochemistry and photobiology Chemist Vol.356 No.-

<P><B>Abstract</B></P> <P>Large scale sea-urchin-like carbon/ZnO heterostructures were successfully synthesized using a novel low temperature hydrothermal method, in which glucose and zinc acetate were employed as carbon and ZnO sources, respectively. ZnO nanowires with an average diameter of 40–50 nm were grown on the surface of carbon microspheres forming carbon/ZnO hybrid nano/micro heterostructures. Owing to the large surface area, superior conductivity, and strong light absorption in the ultraviolet region, the hybrid nano/micro heterostructures showed excellent photocatalytic efficiency for the degradation of methylene orange under ultraviolet light irradiation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The novel low temperature hydrothermal method to synthesize sea-urchin-like carbon/ZnO heterostructures is demonstrated. </LI> <LI> Carbon/ZnO hybrid nano/micro heterostructures catalysts efficiently degrade methylene orange. </LI> <LI> The effects of heat treatment on morphologies and photocatalytic activity of the heterostructures have been investigated. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>