• Title, Summary, Keyword: sea urchin

Search Result 105, Processing Time 0.033 seconds

Nitrogen Characteristics in Poultry Manure Using Sea Urchin Shell Powder as Poultry Diets : A Field Study

  • Chung, Tae Ho;Choi, In-Hag
    • Journal of Environmental Science International
    • /
    • v.23 no.1
    • /
    • pp.153-156
    • /
    • 2014
  • This study was conducted to evaluate the effects of sea urchin shell powder on nitrogen characteristics in poultry litter by assigning ninety 1-d-old male broiler chicks (Arbor Acres) to one of 3 treatments (control, 1% sea urchin shell powder, and 1% feed additives) in 3 replicates of 10 birds each. For all treatments, the overall dry matter contents were decreased (P < 0.05) as time increased, except for at 1 week. When compared with controls, the dietary sea urchin shell powder and feed additives for 0 and 3 weeks did influence their TN contents, but not for 1, 2 and 4 weeks. The treatments with sea urchin shell powder and feed additives had a significant (P < 0.05) influence on $NH_3$-N in poultry litter compared with controls. However, at 4 weeks, no marked differences were observed in $NH_3$-N contents among treatments. Treatments with 1% sea urchin shell powder might enhance the value of poultry litter as N fertilizer.

Effects of Sea Urchin Shell Powder on Volatile Fatty Acids in Poultry Litter: A Field Study

  • Chung, Tae Ho
    • Journal of Environmental Science International
    • /
    • v.23 no.2
    • /
    • pp.331-333
    • /
    • 2014
  • We investigated the effects of sea urchin shell powder on 2 volatile fatty acids, acetic and butyric acid, in poultry litter. A total of 60 1-d-old male broiler chicks (Arbor Acres) were allocated to 2 treatments (basal diet and 1% sea urchin shell powder) with 3 replicates of 10 birds each. During the 4-week experimental period, significant differences in acetic acid and butyric acid concentrations were observed between treatments (P < 0.05), except for acetic acid at 1 week. Additions of 1% sea urchin shell powder resulted in lower acetic and butyric acid concentrations compared to the litter of control birds. We conclude that the sea urchin shell powder used in this study might prove beneficial in reducing environmental pollution caused by poultry litter.

Feature Point Extraction of Sea Urchin using Adaptive Edge Detection (적응적 경계 검출을 이용한 성게의 특징점 추출)

  • Jeon, Young-Cheol;Woo, Young-Bae;Choi, Chul-Jae
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.12 no.1
    • /
    • pp.173-180
    • /
    • 2017
  • 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.

Hepatic Detoxification and Antioxidant Activity in Sea-urchin Roe and Ethanol Extract of Roe (성게 부위별 및 그 추출물의 간 해독과 항산화 활성 효과)

  • Lee, Seung-Joo;Ha, Wang-Hyun;Choi, Hye-Jin;Cho, Soon-Yeong;Choi, Jong-Won
    • Korean Journal of Fisheries and Aquatic Sciences
    • /
    • v.43 no.5
    • /
    • pp.428-436
    • /
    • 2010
  • 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), $\gamma$-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, $\gamma$-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.

Sea Urchin Injury Accompanied by Paresthesia (성게 가시 자상과 동반된 이상 감각 1예)

  • Kim, Yeong Ho;Lee, Ji Hyun;Park, Young Min;Lee, Jun Young
    • Korean journal of dermatology
    • /
    • v.55 no.8
    • /
    • pp.511-513
    • /
    • 2017
  • Sea urchins are marine invertebrates commonly found in coastal areas around the world. The potential mechanisms of injury are primary puncture wounds, envenomation, and the foreign body reaction. A 20-year-old woman presented with multiple, 0.2 to 0.3 cm-sized, erythematous papules with central blackish particles accompanied by numbness and pain on the dorsum of the right foot and ankle for 7 days. She had been injured by a sea urchin 7 days prior at the seaside in Guam. A skin biopsy of the lesion showed inflammation with foreign body reaction. The attending physician removed all the blackish particles and applied mupirocin ointment. Although skin lesions improved over time, numbness and pain still remained. There have been only six reported cases of sea urchin granuloma in Korea, but no reports of sea urchin injury with neurologic symptoms. Herein, we report a rare case of sea urchin injury accompanied by paresthesia.

Fatty Acid Compositions of Three Species of Marine Invertebrates (3종의 해산 무척추동물의 지방산 조성)

  • Jeong, Bo-Young;Moon, Soo-Kyung;Jeong, Woo-Geon
    • Journal of the Korean Society of Food Science and Nutrition
    • /
    • v.22 no.3
    • /
    • pp.291-299
    • /
    • 1993
  • The lipid components of the gonad of sea urchin Hemicentrotus pulcherrimus, ark shell Scapharca bro-ughtonii and "Gaebul" (Korea name, a worm) Urechis unicinctus were investigated. The total lipid (TL) contents of the sea urchin, the ark shell and the "Gaebul" were 6.10, 0.67 and 0.79%, respectively. The percentages of phospholipid (PL) in TL were higher in the "Gaebul"(72.4%) and ark shell(64.9%) compared to the sea urchin (41.7%). The major lipid classes of PL were phosphatidylcholine and phosphatidylethanolamine, and the former was rich in the sea urchin (56.2%) and the latter in the "Gaebul"(34.4%). In the class of non-polar lipid (NL), the major lipid classes were different from species ; the sea urchin was rich in triglyceride(TG, 89.0%), the ark shell rich in TG (69.2%) and cholesterol (ST 26.8%) and the "Gaebul"rich in ST (70.7%). The prominent fatty acids of the sea urchin were 16 : 0, 14 : 0, 20 : 5n-3, 20 : 4n-6 and 20 : 4n-6 and 20 : 2NMID(non-methylene interupted dien). The percentage of 20 : 4n-6 was the highest of the investigated invertebrates, accounting for 19.8% in PL, but 22 : 6n-3 was not detected in the sea urchin. In case of the ark shell, the prominent fatty acids were 16 : 0, 18 : 0, 20 : 5n-3, 22 : 6n-3 and 22 : 2NMID, especially 22 : 6n-3(9.58%) was richer compared to that of the "Gaebul". The prominent fatty acids of the "Gaebul"were 20 : 5n-3, 16 : 0, 18 : 0 20 : 1n-9, 16 : 1n-7 and 14 : 0. The percentage of 20 : 5n-3 (22.0%) was highest in the PL of the "Gaebul"among the three invertebrates. These differences in the lipid components of all the sample is considered to be due to the different food habits and environmental condition of the invertebrates.

  • PDF

Effects of Sea Urchin Shell Powder as Poultry Diet on E.coli and Salmonella in Poultry Litter -A Field Study- (성게껍질 분말을 육계사료에 첨가시 깔짚내 E.coli와 Salmonella에 미치는 영향 -현장연구를 중심으로-)

  • Choi, In Hag
    • Journal of Environmental Science International
    • /
    • v.27 no.1
    • /
    • pp.55-58
    • /
    • 2018
  • The purpose of this study was to evaluate the effect of sea urchin shell powder, used in broiler diet, on Esherichia coli and Salmonella in litter produced by the broilers. A total of 120 broiler chickens were fed 1 of 3 treatment diets (10 chickens per pen) in a randomized block design treatments with 4 replications. Sea urchin shell powder was used in the concentrations of 0.5% and 1% in the basal diets; the control diet was constituted of basal diet. During the 3-week feeding trials, none of the treatments significantly affected the E. coli populations in poultry litter at weeks 0 and 1, nor did they affect the and S. enterica populations at weeks 1 and 3. However, dietary sea urchin shell powder addition affected the population of E. coli at weeks 2 and 3, and that of S. entericaat weeks 0 and 2 (P<0.05). It is therefore concluded that the use of dietary sea urchin shell powder (0.5% and 1%) will be beneficial enough to reduce E. coli, rather than S. enterica in poultry litter over short-term periods.

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

  • Jeon, Byung Hee;Yang, Kwon Mo;Kim, Jeong Ha
    • ALGAE
    • /
    • v.30 no.2
    • /
    • pp.139-146
    • /
    • 2015
  • 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.

Effects of Anti-Fouling System(AFS) on embryos of a sea urchin, Mesocentrotus nudus (국내 주상용 Anti-Fouling System 처리 활성물질이 둥근성게(Mesocentrotus nudus)의 배아에 미치는 영향)

  • Seo, Jin-Young;Kang, Jung Hoon;Choi, Jin-Woo
    • Korean Journal of Environmental Biology
    • /
    • v.37 no.3
    • /
    • pp.389-395
    • /
    • 2019
  • 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 Sea-nine, Diuron, and Irgarol on the fertilization rate of sea urchin were 32.8 ㎍ L-1, 7,975 ㎍ L-1 and 6,995 ㎍ L-1, respectively. The EC50 of Sea-nine, Diuron, and Irgarol on the development rate of sea urchin were 31.6 ㎍ L-1, 3,044 ㎍ L-1, and 2,267 ㎍ L-1, respectively. The highest toxicity was observed in the presence of Sea-nine.

A Newly Recorded Sea Urchin (Echinoidea: Spatangoida: Spatangidae) from Geomundo Island, Korea

  • Shin, Sook
    • Animal Systematics, Evolution and Diversity
    • /
    • v.29 no.4
    • /
    • pp.308-311
    • /
    • 2013
  • A sea urchin was collected from Geomundo Island of Jeollanam-do, Korea on July 3, 2009. This specimen was classified as Spatangus luetkeni A. Agassiz 1872 belonging to the family Spatangidae of order Spatangoida based on the morphological characteristics. This genus and species are newly recorded in Korea. It is distinct morphological characters that test is thick and strong, six to eight primary tubercles are in 1 and 4 interambulacra, sternum is equipped with little keel, and color in alcohol is dark violet. This species inhabits tropical waters and usually distributes over the West Pacific from southern Japan to New Zealand.