Ligophorus abditus n. sp. (Monogenea: Ancyrocephalidae) and other species of Ligophorus Euzet & Suriano, 1977 infecting the flathead grey mullet Mugil cephalus L. in the Sea of Japan and the Yellow Sea

Continuous measurements of gaseous elemental mercury (Hg(0)) in the marine boundary layer (MBL) and Hg(0) fluxes were conducted in the Sea of Japan and the Sea of Okhotsk from September 7 to October 17, 2019. All Hg(0) measurements were carried out using two RA-915M mercury analysers (Lumex LLC, Russia). Hg(0) concentrations in the air were measured at two levels (about 2 m and 20 m above the sea surface) with a time resolution of 30 minutes. Hg(0) fluxes were measured at five sample stations using a dynamic flux chamber.During the cruise Hg(0) concentrations varied in the range from 0,47 ng/m3 to 1,55 ng/m3, and from 0,31 ng/m3 to 2,71 ng/m3 with medians of 0,92 ng/m3 for 2 m and 20 m, respectively. Atmospheric Hg(0) concentrations in measurements sites were strongly depended on the regions from where air masses came to the study areas. As a result of the Concentration Weighted Trajectory (CWT) analysis we established 2 regions that influenced the Hg(0) concentrations during the cruise: the Northeast China with the Yellow Sea region and the Kurile Islands sector of the Pacific Ocean. The arrival of air masses from China and the Yellow Sea region caused an increase in Hg(0) concentrations in the air in the Sea of Japan and the Sea of Okhotsk. Elevated concentrations were also observed In the Sea of Okhotsk during the periods air masses came from the Kurile Islands sector of the Pacific Ocean.Hg(0) fluxes were measured at 3 stations in the Sea of Japan and at 2 stations in the Sea of Okhotsk. The values ranged from 0,57 ng/m2/h to 1,55 ng/m2/h, with median value of 1,32 ng/m2/h. A positive relationships between Hg(0) flux and air and water temperature were observed.This work was supported by the Russian Science Foundation (RSF) (Project &#8470; 19-77-10011) and by the National Natural Science Foundation of China (Projects &#8470;: 41876065, 41420104005, U1606401) and National Program on Global Change and Air-Sea Interaction (Project &#8470; GASI-GEOGE-04).

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Reproductive cycle of yellow sea bream Dentex tumifrons in Wakasa Bay, the Sea of Japan off central Honshu

Fisheries Science ◽

10.1111/j.1444-2906.2005.01065.x ◽

2005 ◽

Vol 71 (5) ◽

pp. 1069-1077 ◽

Cited By ~ 3

Author(s):

Osamu TOMINAGA ◽

Miki INOUE ◽

Miho KAMATA ◽

Tadahisa SEIKAI

Keyword(s):

Sea Of Japan ◽

Reproductive Cycle ◽

Yellow Sea ◽

Sea Bream ◽

The Sea Of Japan ◽

Wakasa Bay

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Fog composition at Baengnyeong Island in the Eastern Yellow Sea: detecting markers of aqueous atmospheric oxidations

Atmospheric Chemistry and Physics Discussions ◽

10.5194/acpd-15-24871-2015 ◽

2015 ◽

Vol 15 (17) ◽

pp. 24871-24908

Author(s):

A. J. Boris ◽

T. Lee ◽

T. Park ◽

J. Choi ◽

S. Seo ◽

...

Keyword(s):

Organic Acids ◽

Yellow Sea ◽

Sampling Site ◽

Chemical Species ◽

The Yellow Sea ◽

The Sea Of Japan ◽

Back Trajectories ◽

Fog Water ◽

Source Regions ◽

Photochemical Aging

Abstract. Samples of fog water were collected at Baengnyeong Island (BYI) in the Yellow Sea during the summer of 2014. The most abundant chemical species in the fog water were NH4+ (mean of 2220 μM), NO3− (1260 μM), SO4−2 (730 μM), and Na+ (551 μM), with substantial contributions from other ions consistent with marine and biomass burning influence on some dates. The pH of the samples ranged between 3.48 and 5.00, with a mean of 3.94, intermediate within pH values of fog/cloud water reported previously in Southeast Asia. Back trajectories (72 h) showed that high relative humidity (> 80 %) was encountered upwind of the sampling site by all but one of the sampled air masses, and that the fog composition at BYI can be impacted by several different source regions, including the Sea of Japan, Northeastern China, and the East China Sea. Sulfur in the collected fog was highly oxidized: low S(IV) concentrations were measured (mean of 2.36 μM) in contrast to SO4−2 and in contrast to fog/cloud S(IV) concentrations from pollutant source regions; organosulfate species were also observed and were most likely formed through aging of mainly biogenic volatile organic compounds. Low molecular mass organic acids were major contributors to total organic carbon (TOC; 36–69 %), comprising a fraction of TOC at the upper end of that seen in fogs and clouds in other polluted environments. Large contributions were observed from not only acetic and formic acids, but also oxalic, succinic, maleic, and other organic acids that can be produced in aqueous atmospheric organic processing (AAOP) reactions. These samples of East Asian fog water containing highly oxidized components represent fog downwind of pollutant sources and can provide new insight into the fate of regional emissions. In particular, these samples demonstrate the result of extensive photochemical aging during multiday transport, including oxidation within wet aerosols and fogs.

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A critical re-assessment of the primary productivity of the Yellow Sea, East China Sea and Sea of Japan/East Sea Large Marine Ecosystems

Deep Sea Research Part II Topical Studies in Oceanography ◽

10.1016/j.dsr2.2018.05.021 ◽

2019 ◽

Vol 163 ◽

pp. 6-15 ◽

Cited By ~ 5

Author(s):

Sinjae Yoo ◽

Christina Eunjin Kong ◽

Young Baek Son ◽

Joji Ishizaka

Keyword(s):

East China Sea ◽

Sea Of Japan ◽

Primary Productivity ◽

Yellow Sea ◽

Marine Ecosystems ◽

East Sea ◽

The Yellow Sea ◽

East China ◽

China Sea ◽

Large Marine Ecosystems

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Otolith microchemistry reveals the migration patterns of the flathead grey mullet Mugil cephalus (Pisces: Mugilidae) in Korean waters

Journal of Ecology and Environment ◽

10.1186/s41610-020-00164-9 ◽

2020 ◽

Vol 44 (1) ◽

Author(s):

Seung Eun Bae ◽

Jin-Koo Kim

Keyword(s):

Otolith Microchemistry ◽

Migration Pattern ◽

Mugil Cephalus ◽

The Yellow Sea ◽

Northwest Pacific ◽

Type I ◽

Type Ii ◽

Grey Mullet ◽

Migration Patterns ◽

Population Origin

Abstract Background The flathead grey mullet Mugil cephalus has the widest distribution among mugilid species. Recent studies based on mitochondrial DNA sequences showed that the species comprises at least 14 different groups, three of which occur in the northwest Pacific. We analyzed the otolith microchemistry of M. cephalus at several locations in Korea to improve understanding of migration pattern and population origin. Results We collected 123 sagittal otoliths from seven locations and determined their concentrations of eight elements (7Li, 24Mg, 55Mn, 57Fe, 60Ni, 63Cu, 88Sr, and 138Ba) using laser ablation inductively coupled plasma mass spectrometry. Mean otolith elemental ratios differed significantly among the locations. The Sr:Ca, Fe:Ca, and Ba:Ca ratios were significantly higher than others, and useful chemical signatures for investigating the habitat use of M. cephalus populations. We identified five diverse and complicated migration patterns using the otolith data that we collected: estuarine resident (type I), freshwater migrant (type II), estuarine migrant (type III), seawater resident (type IV), and seawater migrant (type V). A canonical discriminant analysis plot revealed separation of two groups (type II in the Yellow Sea vs. other types in remaining locations). Two locations on Jeju Island, despite their close proximity, had fish with quite different migration patterns, corroborating previous molecular studies that distinguished two groups of fishes. Conclusion We successfully showed that the migration patterns of the Korean mullet varied by location. Only fish from the western sector of Jeju had a unique migration pattern, which is likely confined population in this area. Among the eight otolith elements measured, the Sr:Ca ratio was found to be the best indicator of migration pattern and population origin.

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Cyclostome bryozoans from Qingdao, South Yellow Sea, China

Zootaxa ◽

10.11646/zootaxa.4603.3.3 ◽

2019 ◽

Vol 4603 (3) ◽

pp. 473

Author(s):

H. LIU ◽

X. LIU ◽

K. ZÁGORŠEK

Keyword(s):

Sea Of Japan ◽

Yellow Sea ◽

Western Pacific ◽

The Sea Of Japan ◽

South Yellow Sea ◽

Additional Species ◽

First Time ◽

The Western Pacific

Twenty-one species of cyclostome bryozoans are described from the coast of Qingdao (South Yellow Sea, China), belonging to 11 genera (Filicrisia, Crisia, Tubulipora, Exidmonea, Idmidronea, Qingdaoella n. gen., Nevianipora, Hemipustulopora, Microeciella, Patinella and Disporella). One genus (Qingdaoella n. gen.) and 10 species are new, while an additional species is reported for the first time from China. The most similar bryozoan assemblages to the Chinese cyclostomes described here are reported from the Sea of Japan and the western Pacific.

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