Ocean and Polar Research最新文献_第9页

Study on the Annual Reproductive Cycle of the Comb Pen Shell, Atrina pectinata (Linnaeus, 1767) (Mollusca: Bivalvia: Pinnidae) on the Southern Coast of Ulleungdo Island, Korea 郁陵岛南部海岸梳状笔壳(Atrina pectinata, Linnaeus, 1767)(软体动物:双壳亚目:羽壳科)年繁殖周期的研究

Ocean and Polar Research Pub Date : 2016-03-30 DOI: 10.4217/OPR.2016.38.1.021

Hyun-Sung Yang, C. Noh, S. Yoon, Yun-Bae Kim, Kwang-Sik Choi, D. Kang

{"title":"Study on the Annual Reproductive Cycle of the Comb Pen Shell, Atrina pectinata (Linnaeus, 1767) (Mollusca: Bivalvia: Pinnidae) on the Southern Coast of Ulleungdo Island, Korea","authors":"Hyun-Sung Yang, C. Noh, S. Yoon, Yun-Bae Kim, Kwang-Sik Choi, D. Kang","doi":"10.4217/OPR.2016.38.1.021","DOIUrl":"https://doi.org/10.4217/OPR.2016.38.1.021","url":null,"abstract":"Gametogenesis of the comb pen shell, Atrina pectinata (Linnaeus, 1767) (Bivalvia: Pinnidae) on the southern coast of Ulleungdo Island, Korea was assessed monthly (November 2013 to October 2014) using histology. Gametogenesis commenced in January when the surface water temperature was 12.6℃ and pen shells evidenced an early development phase with small oogonia from January to April, although few females exhibited ripe eggs in their follicular epithelium. In April, the oocyte diameter increased rapidly, and fully mature eggs appeared in May. First spawning males and females were observed in June as the surface water temperature reached 19.3℃ and July (23.2℃) respectively. The spawning activity continued until the end of September. Histology indicated that the spawning peak of the females in Ulleungdo Island was July to August. During October to January, most of the pen shells were in spent and resting stages. Our data suggested that A. pectinata is a summer spawner, and their annual gametogenesis is closely associated with the seasonal variation in the surface water temperature. The present study is the first provided fundamental information on the life history of A. pectinata in Ulleungdo Island, and this can be put to good use in the management of this pen shell in the study area.","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":"38 1","pages":"21-33"},"PeriodicalIF":0.0,"publicationDate":"2016-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70345571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Antioxidant Capacity of Crude Extract and Its Solvent Fractions of Arctic Terrestrial Plant Ranunculus heperporeus 北极陆生植物毛茛粗提物及其溶剂组分的抗氧化能力

Ocean and Polar Research Pub Date : 2016-01-01 DOI: 10.4217/opr.2016.38.3.185

J. Lee, Hojun Kim, Hyo-Won Seo, C. Kong, Y. Seo

引用次数: 0

Tests for Asymmetry and Structure Changes in Retail Price Volatility of Fresh Common Squid in the Republic of Korea 韩国鲜鱿鱼零售价格波动的不对称性和结构变化检验

Ocean and Polar Research Pub Date : 2016-01-01 DOI: 10.4217/opr.2015.37.4.357

Jongoh Nam, Seonghyun Sim

{"title":"Tests for Asymmetry and Structure Changes in Retail Price Volatility of Fresh Common Squid in the Republic of Korea","authors":"Jongoh Nam, Seonghyun Sim","doi":"10.4217/opr.2015.37.4.357","DOIUrl":"https://doi.org/10.4217/opr.2015.37.4.357","url":null,"abstract":"This study analyzed structural changes and asymmetry of price volatility during the period before and after a point of structural change in price volatility, using the Korean fresh common squid daily retail price data from January 1, 2004 to September 30, 2015. This study utilized the following analytical methods: the unit-root test was applied to ensure the stability of the data, the Quandt-Andrews breakpoint test was applied to find the point of structural change, and the Glosten-Jagannathan-Runkle GARCH and EGARCH models were applied to investigate the asymmetry of price volatility. The empirical results of this study are as follows. First, ADF, PP, KPSS and Zivot-Andrews tests showed that the daily retail price change rate of the Korean fresh common squid differentiated by logarithm was stable. Secondly, the ARIMA (2,1,2) model was selected by information criteria such as AIC, SC, and HQ. Thirdly, the QuandtAndrews breakpoint test found that a single structural change in price volatility occurred on June 11, 2009. Fourthly, the Glosten-Jagannathan-Runkle GARCH and EGARCH models showed that estimates of coefficients within the models were statistically significant before and after structural change and also that asymmetry as a leverage effect existed before and after structural change.","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70345971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study on Isotopic Fractionation between Ice and Meltwater by a Melting Experiment 冰与融水间同位素分馏的熔融实验研究

Ocean and Polar Research Pub Date : 2015-12-30 DOI: 10.4217/OPR.2015.37.4.327

Jeonghoon Lee, J. Ham, S. Hur

{"title":"A Study on Isotopic Fractionation between Ice and Meltwater by a Melting Experiment","authors":"Jeonghoon Lee, J. Ham, S. Hur","doi":"10.4217/OPR.2015.37.4.327","DOIUrl":"https://doi.org/10.4217/OPR.2015.37.4.327","url":null,"abstract":"Isotopic compositions of ice and meltwater play a very crucial role in paleoclimate studies based on ice cores and water resources research conducted in alpine hydrogeology. Better understanding of variations in the stable isotopic compositions of water is required since changes from ice to liquid water are gaining more attention due to recent climate change. In this work, a melting experiment was designed and conducted to investigate how the isotopic compositions of ice vary with time by heat sources, such as solar radiation. We conducted the melting experiment for 22 hours. The discharge rate rose to a maximum value after 258 minutes and gradually declined because we fixed the heat source. The isotopic compositions of meltwater increased linearly or to a second degree polynomial. The linear relationship between oxygen and hydrogen has a slope of 6.8, which is less than that of the Global Meteoric Water Line (8) and higher than a theoretical value (6.3). The deuterium excess decreased when δD or δ 18 O increases or vise versa since the slope of the relationship for ice-liquid exchange is less than 8. These findings and the apparatus of the melting experiments will make a helpful contribution to the studies of stable isotopes and the melting process in temperate and polar regions.","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":"37 1","pages":"327-332"},"PeriodicalIF":0.0,"publicationDate":"2015-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70345909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

First Record of Rhopilema esculentum (Scyphozoa, Rhizostomae), Edible Jellyfish in Korea 标题韩国可食水母Rhopilema esculentum(剑齿纲，根口科)首次记录

Ocean and Polar Research Pub Date : 2015-12-30 DOI: 10.4217/OPR.2015.37.4.287

M. S. Ullah, G. Min, D. Jing, W. Yoon, J. Choi

引用次数: 3

Evaluation of North Pacific Intermediate Water Simulated by HadGEM2-AO HadGEM2-AO模拟北太平洋中间水的评价

Ocean and Polar Research Pub Date : 2015-12-30 DOI: 10.4217/OPR.2015.37.4.265

H. Min, B. Yim

引用次数: 0

Ecological Status Evaluation using Seaweed Community Structures of Taean Coastal Areas in Korea 利用韩国泰安沿海海藻群落结构评价生态状况

Ocean and Polar Research Pub Date : 2015-12-30 DOI: 10.4217/OPR.2015.37.4.317

Yeon Ju Na, Ju‐Hee Kim, C. Kwon, H. Choi, K. Nam

{"title":"Ecological Status Evaluation using Seaweed Community Structures of Taean Coastal Areas in Korea","authors":"Yeon Ju Na, Ju‐Hee Kim, C. Kwon, H. Choi, K. Nam","doi":"10.4217/OPR.2015.37.4.317","DOIUrl":"https://doi.org/10.4217/OPR.2015.37.4.317","url":null,"abstract":"To evaluate the relative ecological quality of Taean coastal areas in terms of various seaweed community indices, seasonal samplings were taken at the Hakampo, Padori, Chaeseokpo, Mongsanpo and Bangpo shores from March 2006 to January 2007. A total of 105 species were identified; species richness ranged from 37~72 species spatially and from 65~75 species seasonally over the study period. Coarselybranched seaweeds were dominant in functional group and ESG I (ecological state group I) made up 61 species (58.10%) of the identified macroalgae. The average seaweed biomass at the five study sites was 56.63 g dry wt./m2 (range, 36.66 at Hakampo −73.89 g/m 2 at Mongsanpo). Seaweeds were generally abundant in mid and low intertidal zone. Corallina pilulifera, Ulva australis, Sargassum thunbergii, Neorhodomela aculeata, and Symphyocladia latiuscula were the dominant species across all five study sites. Species diversity was between 1.24~2.30, while species evenness was between 0.40 and 0.61. The dominance index ranged from 0.43 at Padori to 0.64 at Mongsanpo. Given the community indices and shore descriptions, the five study sites were divided into two groups based on ecological quality: moderate (Chaeseokpo and Mongsanpo) and good (Hakampo, Padori and Bangpo).","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":"37 1","pages":"317-325"},"PeriodicalIF":0.0,"publicationDate":"2015-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70345872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Data Standardization for Research Ocean-Data Management and Standard Proposal of Physical Oceanographic Data 研究海洋数据标准化——数据管理与海洋物理数据标准建议

Ocean and Polar Research Pub Date : 2015-12-30 DOI: 10.4217/OPR.2015.37.4.249

Sung-Dae Kim, Sang-Hwa Choi, Jun–Yong Park, Soo-Young Pa

{"title":"Data Standardization for Research Ocean-Data Management and Standard Proposal of Physical Oceanographic Data","authors":"Sung-Dae Kim, Sang-Hwa Choi, Jun–Yong Park, Soo-Young Pa","doi":"10.4217/OPR.2015.37.4.249","DOIUrl":"https://doi.org/10.4217/OPR.2015.37.4.249","url":null,"abstract":"Standardization work for the ocean data produced by a variety of national oceanographic research projects was conducted in order to establish a national ocean data sharing system. For this work, we first prepared standard proposals for the national research ocean data by reviewing and analyzing of existing international and domestic ocean-data standards. The proposed standards were reviewed and revised by experts in the field of oceanography and academic societies for documentation. The 125-page technical report on the standards of 25 data items was prepared as an output of this research work, which is available free of charge for the public and interested parties. This paper explains the proposed standards of metadata and codes regarding the common properties of all the oceanographic data items. Especially, the standards for the metadata, codes and data formats of 4 physical data items were described in detail. In order to be adopted as the national standards for ocean data, however, the standards suggested here require further development and/or modification based on additional reviews of and ample feedbacks from the relevant academic and technical communities.","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":"37 1","pages":"249-263"},"PeriodicalIF":0.0,"publicationDate":"2015-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70345734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

꽈배기모자반 추출물이 3T3-L1 지방세포 분화에 미치는 영향 麻花海藻提取物对3T3-L1脂肪细胞分化的影响

Ocean and Polar Research Pub Date : 2015-12-30 DOI: 10.4217/OPR.2015.37.4.279

공창숙, 이정임, 권명숙, 서영완

引用次数: 3

Physical Parameter Measurement and Theoretical Target Strength Estimation of Juvenile Cod (Gadus macrocephalus) 大头鱼幼鱼物理参数测量及理论目标强度估算

Ocean and Polar Research Pub Date : 2015-12-30 DOI: 10.4217/OPR.2015.37.4.333

Iqbal Ali Husni, Bokyu Hwang, H. Shin, Min-son Kim

引用次数: 0