• Title/Summary/Keyword: Korean waters

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A Study on the Analysis ansd tne Quantification of Effect Level of Causal Factors in Tanker Casualties (유조선 사고의 원인분석과 유효수준 결정에 관한 연구)

  • 정재용;박진수
    • Journal of the Korean Institute of Navigation
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    • v.22 no.1
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    • pp.23-30
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    • 1998
  • Traffic density has increased recently in Korean waters due to an expansion of the sea trade and the development of coastal fisheries. The enlargement of the coastal industrial belts and the development of coastal inslands further increases marine traffic. The rapid increase of marine traffic has often resulted in marine casualties with the attendant loss of life, damage to property, and marine pollution. Especially, tanker casualties may destroyed the food web and an untold amount of ocean resources. Un regard to the potential of tanker spills in Korean waters, systematic research in this field is lacking. In this paper, the data relating to a total of 261 tanker casualties in Korean waters has been compiled and statistically anlaysed. The result of this study describes the general trend of marine casualties in Korean waters, and describes the casualtiy database, from which their causes and consequences are derived and this results in the determination of the causal relationships connected to tanker casualties, and quantifies the effective level of causal factorsin Korean waters.

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Long-term variation in catch of Spanish mackerel (Scomberomorus niphonius) related to environmental change in Korean waters (환경변화에 따른 한국 연근해 삼치 (Scomberomorus niphonius) 어획량의 장기변동)

  • Lee, Seung-Jong;Kim, Byung-Yeob;Chang, Dae-Soo
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.47 no.2
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    • pp.99-107
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    • 2011
  • The relationships among long-term variation in catches of Spanish mackerel (Scomberomorus niphonius) and main food organism such as common mackerel (Scomber japonicus), anchovy (Engraulis japonicus), and oceanic condition in Korean waters were analyzed using 40 years of time-series data from 1971-2010. In the 1990s, oceanic conditions around the Korean peninsula shifted to a warmer regime with higher SST (sea surface temperature). The total catch of Spanish mackerel in Korean waters increased dramatically since the early 2000s, and main fishing ground form into South Sea in winter season from December to January. From the results of correlation analysis, we found a significant relationship between the Spanish mackerel catch and environmental factor such as SST, common mackerel and anchovy catch in Korean waters.

Anomalous Variation of the Oceanic Features around Korean Waters Related to the Global Change (지구환경 변화와 관련된 한국 연근해 해양 이상변동)

  • 서영상;장이현;황재동
    • Journal of Environmental Science International
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    • v.12 no.3
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    • pp.257-263
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    • 2003
  • Oceanographic features around Korean waters related to the global change were studied by analysis of the longterm variation of water temperature, dissolved oxygen, sea level of the surface layer with 1$^{\circ}C$ temperature, spatial position of the subpolar front in the East Sea/Japan Sea (the East sea hereafter) and the Wolf Sunspot Number. With the global warming, the temperature of Korean waters has been increased 0.5∼1.0$^{\circ}C$ for 33years (1968∼2000). In case of the dissolved oxygen in the East Sea has been decreased 0.46$m\ell$/$\ell$. Year to year vertical fluctuations of the monthly anomalies of the surface layer with 1$^{\circ}C$water in the East Sea have predominant periods with 15years as the longterm variation of Arctic climate, 12 and 18years as the El Nino-Southern Oscillation. Spatial position of the subpolar front in the East Sea moved to northern part of the sea from the southern part of the sea with the increasing sea surface temperature. The relationship between the number of Wolf Sunspot and the anomalies of sea surface temperature was very closer after the late of 1980s than those before the early of 1980s in Korean waters.

Cyclopid Copepods of Genus Oithona in Korean Waters (한국 근해에 분포하는 Oithona속의 요각류)

  • 유광일;임동현
    • Animal Systematics, Evolution and Diversity
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    • v.9 no.2
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    • pp.91-102
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    • 1993
  • The genus Oithona was investigated taxonomically in samples collected from 10 regions of the Korean waters. In result, 18 species of the genus Oithona were identified, and a key table on 18 species was given. Of these following nine species were new records for Korean waters: Oithona atlantica, 0 . attenuata, 0 . davisae, 0. hamata, 0. longispina, 0 . oculata, 0 . simplex, 0. tenuis, 0. vivida.

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Stylocheiron abbreviatum (Euphausiacea, Crustacea): A New Record from the Korean Waters

  • Suh, Hae-Lip
    • Fisheries and Aquatic Sciences
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    • v.15 no.3
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    • pp.255-257
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    • 2012
  • The euphausiid crustacean Stylocheiron abbreviatum G. O. Sars, 1883 has been found in the southern waters of Jeju Island, Korea. This species is the third member of the genus Stylocheiron and the twelfth of the family Euphausiidae identified in Korean waters. Using descriptions of this species, a key to Korean euphausiids is presented.

Occurrence of Porcellanopagurus nihonkaiensis (Decapoda: Anomura: Paguroidea: Paguridae) in Korean Waters

  • Ko, Hyun-Sook;McLaughlin, Patsy A.
    • Animal Systematics, Evolution and Diversity
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    • v.24 no.1
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    • pp.129-133
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    • 2008
  • A pagurid crab carrying half of a bivalve shell was collected from Jejudo Island and identified as Porcellanopagurus nihonkaiensis. A diagnosis with illustrations of this specimen is presented. Although, Komai and Takeda (2006) reported this species as rare and known only from Japan, its range is now extended to Korean waters. At present, it is the only species of the genus Porcellanopagurus represented in Korean waters.

New Records of Two Genera Mesoporos and Prorocentrum (Prorocentraceae, Prorocentrales, Dinophyceae) in Korean Waters

  • Lee, Joon-Baek;Kim, Gyu-Beom
    • Korean Journal of Environmental Biology
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    • v.35 no.3
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    • pp.265-272
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    • 2017
  • The order Prorocentales currently includes two genera Prorocentrum Ehrenberg and Mesoporos Lillick. The Prorocentrum genus is a predominant group throughout the year found in Korean waters. To date, the Prorocentrum genus includes 31 species and the Mesoporos genus has only one species in Korean waters. In this study, we identified one Mesoporos species and three Prorocentrum species around a coast of Jeju Island, and described them as newly recorded species in Korean waters.

Two Unrecorded Molluscan Species (Atrina teramachii and Liocranchia reinhardti) from Korean Waters

  • Son, Min-Ho
    • The Korean Journal of Malacology
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    • v.25 no.2
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    • pp.91-92
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    • 2009
  • Two molluscan species belonging to Bivalvia (Atrina teramachii Habe) and Cephalopoda (Liocranchia reinhardti Steenstrup) were found new to the Korean malacofauna. The author report, consequently, two additional molluscan species new to the fauna with figures and remarks on slight morphological variation comparing to the original and previous descriptions.

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Fishing Characteristics of Pacific Herring Clupea pallasii and Relationship between Its Catch and Sea Temperature during the Past 50 Years in Korean Waters (50년간 우리나라 청어(Clupea pallasii)의 어획 특성 및 어획량과 수온과의 관계)

  • Yoo, Joon-Taek;Kim, Jung Jin
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.54 no.2
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    • pp.208-217
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    • 2021
  • This study described the fishing characteristics of Pacific herring Clupea pallasii and examined the relationship between its catch and sea temperature in Korean waters from 1970 to 2019. Although the herring catch in Korean waters stayed below 1,000 tons per year from the mid-1970s to mid-1980s, the catch in the winters in the East Sea of Korea started to increase markedly after 1987-1988, when the sea surface temperature (SST) seemed to shift to a warmer regime. Since the mid-2000s, overall, herring was caught throughout the year in the East Sea and eastern South Sea of Korea, and its catch significantly increased by around 30,000 tons per year. The main fishing grounds of herring in the poor fishing years until the mid-1980s were possibly formed in the western offshore of Korea, and subsequently the fishing grounds were distributed in the eastern coast of Korea. While the standardized catch per unit effort (CPUE) for two main fisheries of herring catch was significantly correlated with the herring catch since the 2000s, there was a gradual decline since the 2010s. The herring catch in the East Sea had significant positive correlations with SSTs, but that in the West Sea had a significant negative correlation.

First record of Heterorhabdus papilliger(Calanoida, Heterorhabdidae) from Korean waters based on morphological and molecular features

  • Lee, Seok Ju;Jeong, Man-Ki;Seo, Min Ho;Choi, Jang Han;Soh, Ho Young
    • Journal of Species Research
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    • v.10 no.1
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    • pp.78-85
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    • 2021
  • Heterorhabdus papilliger (Claus, 1863) is newly reported from the Tsushima Warm Current realm of the southern Korean waters. Its morphological diagnostic characteristics generally agreed well with the original description and the previous records of H. papilliger. The female of H. papilliger can be recognized by the genital somite, which in lateral view has a more or less rounded genital prominence and an uninflated posterior ventral margin; the second exopodal segment of male right leg 5 with the medial projection with a large, rounded, plumose proximal lobe, and a poorly developed distal lobe. The genetic difference for the partial mtCOI gene between Korean specimens and H. papilliger from Spain and Japan of the same clade is 0.4%, while the difference between Korean specimens is 0.5%. However, the interspecific difference for the mtCOI gene between H. papilliger from the Korean waters and the other Heterorhabdus species is in the range of 14.7-20.8%, suggesting that the former is a valid species.