Metabarcoding dissection of harmful algal bloom species in the East China Sea off Southern Zhejiang Province in late spring

2021 ◽  
Vol 169 ◽  
pp. 112586
Author(s):  
Yang Chen ◽  
Qing Xu ◽  
Kate Gibson ◽  
Nansheng Chen
Keyword(s):  
East China Sea ◽  
Algal Bloom ◽  
Harmful Algal Bloom ◽  
Zhejiang Province ◽  
Late Spring ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Harmful Algal Bloom Species

scholarly journals The rise and fall of electrical beam trawling for shrimp in the East China Sea: technology, fishery, and conservation implications

2007 ◽  
Vol 64 (8) ◽  
pp. 1592-1597 ◽  
Author(s):  
Congda Yu ◽  
Zhihai Chen ◽  
Lianyuan Chen ◽  
Pingguo He
Keyword(s):  
East China Sea ◽  
Fishery Management ◽  
New Technology ◽  
Zhejiang Province ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Pulse Generators ◽  
Conservation Implications ◽  
Battery Packs

Abstract Yu, C., Chen, Z., Chen, L., and He, P. 2007. The rise and fall of electrical shrimp beam trawling in the East China Sea: technology, fishery, and conservation implications. – ICES Journal of Marine Science, 64: 1592–1597. Since the 1980s, shrimp beam trawling has flourished in inshore waters of the East China Sea (ECS) off Zhejiang Province. By 2000, there were more than 10 000 beam trawlers operating in the area. The fishery targets several species of shrimp, including Parapenaeopsis hardwickii, Solenocera crassicornis, Parapenaeus fissuroides, and Trachypenaeus curvirostris. In the early 1990s, electrical beam trawls using pulse generators, powered either from the vessel or from underwater battery packs, became popular in the fishery. As a result of this new technology, the catch rates of shrimp, especially the burrowing shrimp species, increased. At its peak usage, there were more than 3000 vessels using electrical beam trawls in Zhejiang Province and another 500 or more in the adjacent provinces of Jiangsu and Fujian. This technology was also widespread along the Chinese coast, but a lack of regulation resulted in the misuse of electrical pulse parameters that caused damage to juvenile shrimps and other benthic species. In 2001, this fishing method was banned from the waters off Zhejiang Province, and subsequently in other parts of the ECS. This paper reviews the research on electrical beam trawls, the fishery, and fishery-management issues associated with this new technology.

scholarly journals The Social Costs of Marine Litter along the East China Sea: Evidence from Ten Coastal Scenic Spots of Zhejiang Province, China

2019 ◽  
Vol 11 (6) ◽  
pp. 1807 ◽  
Author(s):  
Manhong Shen ◽  
Di Mao ◽  
Huiming Xie ◽  
Chuanzhong Li
Keyword(s):  
Contingent Valuation ◽  
East China Sea ◽  
Choice Experiment ◽  
Social Costs ◽  
Zhejiang Province ◽  
East China ◽  
The East China Sea ◽  
Marine Litter ◽  
China Sea ◽  
The Social

Marine litter poses numerous threats to the global environment. To estimate the social costs of marine litter in China, two stated preference methods, namely the contingent valuation model (CVM) and the choice experiment model (CEM), were used in this research. This paper conducted surveys at ten different beaches along the East China Sea in Zhejiang province in October 2017. The results indicate that approximately 74.1% of the interviewees are willing to volunteer to participate in clean-up programmes and are willing to spend 1.5 days per month on average in their daily lives, which equates to a potential loss of income of USD 1.08 per day. The willingness to pay for the removal of the main types of litter ranges from USD 0.12–0.20 per visitor across the four sample cities, which is mainly determined by the degree of the removal, the crowdedness of the beach and the visitor’s perception. The social costs are USD 1.08–1.40 per visitor when the contingent valuation method is applied and USD 1.00–1.07 per visitor when the choice experiment method is adopted, which accounts for 8–14% of the beach entrance fee. The analysis of the social costs of marine litter yielded some useful implications regarding future coastal management policy, including extra entrance fee, the quality-oriented environmental strategy and more incentives to volunteers.

scholarly journals Growth and Nutrient Uptake Characteristics of Heterosigma akashiwo (Raphidophyceae) under Nitrogen and Phosphorus Concentrations in the East China Sea

Water ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3166
Author(s):  
Anqiang Yang ◽  
Richard G. J. Bellerby ◽  
Yanna Wang ◽  
Xiaoshuang Li
Keyword(s):  
East China Sea ◽  
Harmful Algal Bloom ◽  
Heterosigma Akashiwo ◽  
East China ◽  
Nutrient Concentrations ◽  
Exponential Growth Phase ◽  
Phosphorus Concentration ◽  
The East China Sea ◽  
China Sea ◽  
Fish And Shellfish

Heterosigma akashiwo is classified as a harmful algal bloom (HAB) species that frequently occurs in eutrophic coastal waters and results in the contamination and mortality of fish and shellfish. The growth of H. akashiwo in four phosphate and nitrate concentration scenarios, representing the observed nutrient concentration ranges in the East China Sea (ECS), was evaluated to further understand the effect of nutrient concentrations on H. akashiwo blooms. The specific growth rate in the exponential growth phase (µ′) and the maximum cell density were lower (17–21% and 41%, respectively) under low phosphorus concentration scenarios, compared to the rates observed under high phosphorus concentration scenarios. The cellular nitrogen-to-phosphorus ratios of H. akashiwo were influenced by the initially supplied N:P ratio and the allocation strategy employed. Phosphorus concentration had a greater influence on the total growth of H. akashiwo than nitrate did, within the natural nutrient conditions of the ECS. These results could serve as a reference for coastal water management and marine ecological management and may be useful for further studies on the simulation and prediction of H. akashiwo blooms, particularly in the ECS.

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