Spatial variation of demersal fish diversity and distribution in the East China Sea: Impact of the bottom branches of the Kuroshio Current

2019 ◽  
Vol 144 ◽  
pp. 22-32 ◽  
Author(s):  
Yong Xu ◽  
Lin Ma ◽  
Yue Sun ◽  
Xinzheng Li ◽  
Hongfa Wang ◽  
...  
Keyword(s):  
Spatial Variation ◽  
East China Sea ◽  
Kuroshio Current ◽  
Demersal Fish ◽  
East China ◽  
Fish Diversity ◽  
The East China Sea ◽  
China Sea ◽  
The Kuroshio

Collection of spawning-condition eels of Ariosoma meeki in the Kuroshio Current in the East China Sea

2016 ◽  
Vol 96 (8) ◽  
pp. 1701-1707 ◽  
Author(s):  
Shun Watanabe ◽  
Seishi Hagihara ◽  
Michael J. Miller ◽  
Masamichi Machida ◽  
Kosei Komatsu ◽  
...  
Keyword(s):  
Continental Shelf ◽  
East China Sea ◽  
Seminal Fluid ◽  
Kuroshio Current ◽  
East China ◽  
The East China Sea ◽  
Reproductive Condition ◽  
China Sea ◽  
Gonad Somatic Index ◽  
The Kuroshio

When and where marine eels spawn is poorly known even though species such as those of the family Congridae, Muraenidae and Ophichthidae can be caught in continental shelf habitats. The congrid genus Ariosoma includes small continental shelf eel species whose life histories are not yet known. Mature male and female eels of Ariosoma meeki were observed and captured on 17 August 2009 at the surface at night in the western side of the Kuroshio Current in the East China Sea close to new moon, while they were swimming slowly at the surface and exhibiting apparent reproduction-related behaviour. One male and one sex-unidentified eel (seemingly a male based on body shape) were observed to be chasing one larger female with their heads located near her urogenital pore area. The gonads of the female (540 mm) and the male (410 mm) that were caught by a long-handled dip net were in reproductive condition, because some eggs or seminal fluid were released during handling of the two specimens and high gonad-somatic index (GSI) values of 53 in the female and 20 in the male were recorded. This is one of the few cases in which fully ripe reproductive-condition marine eels have been observed or collected and it provides rare information about the spawning location and timing of this eel species.

Is the Kuroshio Current a strong barrier for the dispersal of the gizzard shad (Konosirus punctatus) in the East China Sea?

2017 ◽  
Vol 68 (5) ◽  
pp. 810 ◽  
Author(s):  
Na Song ◽  
Tianxiang Gao ◽  
Yiping Ying ◽  
Takashi Yanagimoto ◽  
Zhiqiang Han
Keyword(s):  
East China Sea ◽  
Coastal Waters ◽  
Kuroshio Current ◽  
Gizzard Shad ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Konosirus Punctatus ◽  
The Kuroshio ◽  
Strong Barrier

The gizzard shad (Konosirus punctatus) is a common pelagic fish in the East China Sea. To evaluate the influence of Kuroshio Current in shaping the genetic structure of marine species, 10 populations of K. punctatus from Chinese and Japanese coastal waters were collected for analysis based on the mitochondrial DNA marker. All the Japanese populations exhibited higher nucleotide diversity than did Chinese populations. Two distinct clades were identified by the neighbour-joining tree based on haplotypes of Cyt b and the control region. Both AMOVA and pairwise Fst strongly supported the significant genetic divergence between Chinese and Japanese clades, which suggested strictly limited gene exchange. The mismatch distribution of Chinese clade and Japanese Clade B appeared to be unimodal, and Tajima’s D and Fu’s Fs statistics were significantly negative, and, therefore, the hypothesis of selective neutrality was rejected. The results indicated that the Kuroshio Current may not be the strong barrier for the dispersal of K. punctatus in the East China Sea. The climate of Pleistocene periods had played an important role in phylogeographical patterns of K. punctatus and the dispersal strategy of coastal species may be the major current physical barrier for the gene flow among populations from Chinese and Japanese coastal waters.

scholarly journals Radiolarian assemblages in the shelf area of the East China Sea and Yellow Sea and their ecological indication of the Kuroshio Current derivative branches

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9976 ◽  
Author(s):  
Hanxue Qu ◽  
Yong Xu ◽  
Jinbao Wang ◽  
Xin-Zheng Li
Keyword(s):  
East China Sea ◽  
Yellow Sea ◽  
Kuroshio Current ◽  
Sea Surface ◽  
The Yellow Sea ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
The Kuroshio ◽  
Radiolarian Assemblages

We analyzed the radiolarian assemblages of 59 surface sediment samples collected from the Yellow Sea and East China Sea of the northwestern Pacific. In the study region, the Kuroshio Current and its derivative branches exerted a crucial impact on radiolarian composition and distribution. Radiolarians in the Yellow Sea shelf showed a quite low abundance as no tests were found in 15 of 25 Yellow Sea samples. Radiolarians in the East China Sea shelf could be divided into three regional groups: the East China Sea north region group, the East China Sea middle region group, and the East China Sea south region group. The results of the redundancy analysis suggested that the Sea Surface Temperature and Sea Surface Salinity were primary environmental variables explaining species-environment relationship. The gradients of temperature, salinity, and species diversity reflect the powerful influence of the Kuroshio Current in the study area.

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