• The Korean Journal of Zoology
• /
• v.37 no.3
• /
• pp.409-415
• /
• 1994

황해 중부의 2-30m 깊이의 연안 암초지대에서 채집된 Sebastes속 어류는 등지느러미의 극조가 14개이고, 측선공이 30-31개이며, 가슴지느러미 기부와 협부에 흑색 반점이 없어 볼낙속의 다른 유연종과는 잘 구별되었다. 본 조사에서 채집된 10개체의 표본을 기준으로 신종 Sebastes koreanus n. sp.로 기재하고, 국명은 "황해볼낙"으로 명명한다.t;으로 명명한다.

• Animal cells and systems
• /
• v.4 no.3
• /
• pp.251-255
• /
• 2000

Zamolgus cavenularius n. sp. is described from the pennatulacean cnidarian Cavernularia obesa Milne Edwards and Hailme in the Yellow Sea. The new species is readily distinguished from its congeners by the genital doublesomite, mandible, female maxilliped, and other structures. This is the first report on association of a member of Zamolgus with the pennatulacean and the second report on a copepod from the Korean pennatulacean.

• Animal Systematics, Evolution and Diversity
• /
• v.24 no.1
• /
• pp.1-7
• /
• 2008

A taxonomic study was carried out on the cumacean specimens collected from shallow coast of the Yellow Sea in Korea. As a result, Bodotria ovalis Gamo, 1965 is redescribed as new to Korean cumacean fauna based on the differences between ours and previous researchers' views on this species. B. ovalis rarely occurs in the coast of the Yellow Sea.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.18 no.2
• /
• pp.81-89
• /
• 1982

In order to analyze the formation mechanism for the fishing ground of the Gang-dal-i, the relationship between the fish grounds of the Gang-dal-i and the oceanographic structure of the East China Sea and the Yellow Sea is investigated by using the data of the catches of stow net fishery (Fisheries Research and Development Agency, 1970-1979) and the oceanographic observation data (Japan Meteorological Agency). The main fishing grounds of the Gang-dal-i concentrated in the adjacent seas of Daeheugsan island and Sokotra Rock. In these areas, the fishing conditions are generally stable, because about 70% of the total catch of the Gang-dal-i for the ten years is occupied, CPUE also is relatively great, and the coefficients of variation of the catches are relatively small as 0.9 to 1.4. The main fishing periods are roughly from February to March and June to July, and the years of good catches are from 1974 to 1976. In general, the main fishing grounds are formed in the marginal areas of the Yellow Sea Bottom Cold Water. They are the frontal areas in which the Yellow Sea Bottom Cold Water is intermixed with the Yellow Sea Warm Current. The range of the temperature and the salinity in these regions are from 10 to 13$^{\circ}C$ and 32.5 to 34.4$\textperthousand$, respectively.

• Animal Systematics, Evolution and Diversity
• /
• v.32 no.4
• /
• pp.272-280
• /
• 2016

Most scyphomedusae jellyfishes recorded in Korean waters are temperate and subtropical species. In the present study, two cold-water jellyfishes from Korean waters are first described. Scyphomedusae were collected from the coasts of Gangneung and Ulsan of the East Sea, and Boryeong, and the eastern area of the Yellow Sea from June 2006 to May 2015. Scyphomedusae collected in Ulsan and Gangneung were identified morphologically as Aurelia limbata Brandt, 1835. Their umbrella was 250-500 mm in width and 30-50 mm in height; the exumbrella was white and the subumbrella was dark brown in color. The vascular system was complex with anastomosed branches. Individuals of this species lived at about 6.6-9.9℃ and 30-50 m depth in Korean waters. Scyphomedusae collected from the center of the Yellow Sea and from Boryeong were identified as Parumbrosa polylobata Kishinouye, 1910. Their umbrella was disc-shaped, 80-200 mm in width and 20-40 mm in height. Its milky white gonads could be seen through the transparent exumbrella. The stomach cavity was round and flat with four interradial cavities connected by subgenital cavities, and the four oral arms were bifurcated and spear-head shaped. Individuals were found at about 6.4-10.0℃ and 40-90 m depth in Korean waters. The identities of both species were confirmed by molecular analysis using nuclear ribosomal DNA sequences.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.25 no.6
• /
• pp.457-473
• /
• 1992

The first order wave equation over a double shelf has wind stresses on both coastal boundaries and wind stress curl forcing across the shelf. In the Yellow Sea, the effect of wind stress curl can be neglected as a forcing of shelf waves. The decay distance of Kelvin waves is much greater than that of continental shelf waves so that Kelvin waves are transmitted nearly intact through the northern embayment. The numerical method of characteristics has been modified to accomodate wave propagation of opposite directions. Using a little more realistic coastline, the wave model hindcast has been improved for current velocity, but hardly for sea level. It means that Kelvin waves, which mainly determine sea levels, are affected little by the change of bottom slope. For a better hindcast of sea level, input energy of Kelvin waves transmitted from the East China Sea is needed. The basic structure of downwind flows along the coasts and upwind flows along the trough supports the seasonal circulations driven by monsoon winds in the Yellow Sea.

• Animal Systematics, Evolution and Diversity
• /
• v.7 no.1
• /
• pp.127-150
• /
• 1991

The stony corals known from Korean waters are 24 species , 15 genera, 7 families in 5 suborders, of which 7 species are newly recorded to the Korean scleractinian fauna ; Montipora trabeculata, Oulangia stokesiana miltoni, Goniocorella dumosa, Dendrophyllia arbuscula, D.boschmai cyathohelioides, D. micranthus, and Rhizopsammia minuta mutsuensis. They were collected from 35 localities of southern Korea from 1969 to 1986. For the geographical analysis, the coastal waters of Koarea are divided into four regions ; the Yellow Sea, the Korea Strait, the Cheju Island area and the East Sea (Sea of Japan) . These are based on the species diversity , the geographical distribution form, and the community coefficient, Korean scleractinians consists of 8 temperate zone forms(33.3%, Te) and 16 tropical forms(66.7%, Tr) . Concerning the distribution in each region, 3 spp. (2 Te, 1 Tr) occur in the Yellow Sea, 9 Spp. (5 Te, 4 Tr) in the Korea Strait, 16 spp.(4 Te, 12 Tr) in the Cheju Island area and 5 spp. (2 Te, 3 Tr) in the East Sea. The communicty coefficient between the Korea strait and the East Sea is the highest (0.596), and that between the Yellow Sea and the Cheju Island area is the lowest(0).

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.46 no.4
• /
• pp.441-448
• /
• 2010

This paper was concentrated on the distribution and the composition of lost fishing gear on the sea bed around yellow croaker fishing ground in the near sea of Jeju, Korea from April to October 2009 in order to improve the fishery environment. Recovering lost fishing gears was carried out total 10 times with a trawlnet along the isobath. As the result, it seems reasonable to conclude that the amount of lost fishing gear has a deep connection with the dip of the sea bed as well as the fishing gear scale, fishing ground and so on. The amount of recovered lost fishing gears were in order of gillnets, dragged gears, traps and ropes. In particular, traps were recovered almost every time within the survey area.

• Korean Journal of Ichthyology
• /
• v.21 no.1
• /
• pp.28-37
• /
• 2009

The diet of Pacific cod (Gadus macrocephalus) in the East Sea, Yellow Sea and Jinhae Bay was studied by analysis of stomach contents. In total, 518 individuals ranging from 15.5 to 77.0 cm standard length SL were analyzed. Prey organisms of the Pacific cod in the East Sea consistedof Caridea, Cephalopoda and Pisces, whereas In the Yellow Sea, the main food items of Pacific cod were similar to those of East Sea Pacific cod except for Cephalopoda. Interestingly, the stomach contents of Pacific cod in Jinhae Bay is mainly Pisces, which is in contrast to those of the two different coastal areas, the East Sea and the Yellow Sea. Although various species of food were eaten by smaller Pacific cod, both Caridea and Pisces were mainly taken by larger Pacific cod. Consequently, the diet of Pacific cod within acertain size is mainly influenced by prey abundance and prey-size spectrum in its habitat. Higher stomach emptiness of Pacific cod in Jinhae Bay might indicate that fully matured Pacific cod temporally stop feeding during their spawning period.

• Journal of Environmental Impact Assessment
• /
• v.21 no.3
• /
• pp.461-468
• /
• 2012

In general, long-term changes of ecological factors take a pulse form in which they interact with other factors and go through a repeated increasing and decreasing cycle. The coupling of the two approaches the grid model and the box model in ecological modeling can lead to an in-depth understanding of the environment. The study analyzes temporal variations of major storages with an energy system model that formulizes effectively the relationships among nutrients, phytoplankton, and zooplankton in the Yellow Sea and the East China Sea. An increase of light intensity and standing stock of nutrient increase the magnitude and frequency of pulsing. Also, an immense reduction of nutrient concentration can cause extinction of the pulsing and bring about a steady state. It is concluded that the nutrient loads in freshwater discharge from the Yangtze affect the cycles of major ecological components as well as water quality variables and play an important role in the marine ecosystem.