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Dr. Jing Yu
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences

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0 Remote Sensing
0 Environmental effects
0 Generalized additive model
0 Spawning ground
0 Western Guangdong Waters

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Journal article
Published: 12 July 2021 in Journal of Marine Science and Engineering
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Spawning grounds are important areas for fish survival and reproduction, and play a key role in the supplement of fishery resources. This study investigated environmental effects on the spatiotemporal variability of spawning ground in the Pearl River Estuary (PRE), China, using the generalized additive model (GAM), based on satellite remote sensing (sea surface temperature (SST), chlorophyll-a concentration (Chl-a), sea surface salinity (SSS), depth), and in situ observations. Results showed that 39.8% of the total variation in fish egg density was explained by these factors. Among them, the most important factor was SST, accounting for 14.3%, followed by Depth, SSS, and Chl-a, with contributions of 9.7%, 8.5%, and 7.3%, respectively. Spawning grounds in the PRE were mainly distributed in the waters with SST of 22 °C, depth of 30–50 m, SSS of 16–35 ‰, and Chl-a of 6–15 mg/m3. From spring to summer, the spawning ground moved from the outlet of the PRE to the east. The distribution of the spawning ground in the PRE was mainly affected by the Pearl River Plume (PRP), Guangdong Coastal Current (GCC), and monsoons in this area.

ACS Style

Dongliang Wang; Lijun Yao; Jing Yu; Pimao Chen; Ruirui Hu. Response to Environmental Factors of Spawning Ground in the Pearl River Estuary, China. Journal of Marine Science and Engineering 2021, 9, 763 .

AMA Style

Dongliang Wang, Lijun Yao, Jing Yu, Pimao Chen, Ruirui Hu. Response to Environmental Factors of Spawning Ground in the Pearl River Estuary, China. Journal of Marine Science and Engineering. 2021; 9 (7):763.

Chicago/Turabian Style

Dongliang Wang; Lijun Yao; Jing Yu; Pimao Chen; Ruirui Hu. 2021. "Response to Environmental Factors of Spawning Ground in the Pearl River Estuary, China." Journal of Marine Science and Engineering 9, no. 7: 763.

Journal article
Published: 13 March 2021 in Journal of Marine Science and Engineering
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Spawning grounds occupy an important position in the survival and reproduction of aquatic life, which plays an important role in the replenishment of fishery resources, especially in the China coasts where fishery resources are depleting. This study investigated environmental effects on the spatiotemporal variability of fish larvae in the western Guangdong waters (WGWs), on the basis of generalized additive models (GAMs) and center of gravity (CoG). Satellite data including sea surface salinity (SSS), sea surface temperature (SST), and in situ observations for fish larvae from April to June in 2014–2015 were used. Results showed that 40.3% of the total variation in fish larvae density was explained. SST, SSS, and depth showed positive effects in 23–24 °C and 27–30 °C, 24–32 PSU, and 0–60 m, and showed negative effects in 24–27 °C, 32–34.2 PSU, 60–80 m. Based on the stepwise GAMs, the most important factor was month, with a contribution of 10.6%, followed by longitude, offshore distance, depth, and latitude, with contributions of 7.0%, 7.0%, 6.3%, 4.2%, 3.9%, and 1.3%, respectively. Fish larvae CoG shifted northward by 0.6° N and eastwards by 0.13° E from April to June. The distribution of fish larvae in the WGWs was affected by complex submarine topography in the Qiongzhou Strait, coastal upwelling in the WGWs, and runoff from the Pearl River.

ACS Style

Yuting Feng; Lijun Yao; Hui Zhao; Jing Yu; Zhaojin Lin. Environmental Effects on the Spatiotemporal Variability of Fish Larvae in the Western Guangdong Waters, China. Journal of Marine Science and Engineering 2021, 9, 316 .

AMA Style

Yuting Feng, Lijun Yao, Hui Zhao, Jing Yu, Zhaojin Lin. Environmental Effects on the Spatiotemporal Variability of Fish Larvae in the Western Guangdong Waters, China. Journal of Marine Science and Engineering. 2021; 9 (3):316.

Chicago/Turabian Style

Yuting Feng; Lijun Yao; Hui Zhao; Jing Yu; Zhaojin Lin. 2021. "Environmental Effects on the Spatiotemporal Variability of Fish Larvae in the Western Guangdong Waters, China." Journal of Marine Science and Engineering 9, no. 3: 316.

Journal article
Published: 28 January 2021 in Journal of Marine Science and Engineering
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The Pearl River Estuary (PRE) is one of the major fishing grounds for the squid Uroteuthis chinensis. Taking that into consideration, this study analyzes the environmental effects on the spatiotemporal variability of U. chinensis in the PRE, on the basis of the Generalized Additive Model (GAM) and Clustering Fishing Tactics (CFT), using satellite and in situ observations. Results show that 63.1% of the total variation in U. chinensis Catch Per Unit Effort (CPUE) in the PRE could be explained by looking into outside factors. The most important one was the interaction of sea surface temperature (SST) and month, with a contribution of 26.7%, followed by the interaction effect of depth and month, fishermen’s fishing tactics, sea surface salinity (SSS), chlorophyll a concentration (Chl a), and year, with contributions of 12.8%, 8.5%, 7.7%, 4.0%, and 3.1%, respectively. In summary, U. chinensis in the PRE was mainly distributed over areas with an SST of 22–29 °C, SSS of 32.5–34‰, Chl a of 0–0.3 mg × m−3, and water depth of 40–140 m. The distribution of U. chinensis in the PRE was affected by the western Guangdong coastal current, distribution of marine primary productivity, and variation of habitat conditions. Lower stock of U. chinensis in the PRE was connected with La Niña in 2008.

ACS Style

Dongliang Wang; Lijun Yao; Jing Yu; Pimao Chen. The Role of Environmental Factors on the Fishery Catch of the Squid Uroteuthis chinensis in the Pearl River Estuary, China. Journal of Marine Science and Engineering 2021, 9, 131 .

AMA Style

Dongliang Wang, Lijun Yao, Jing Yu, Pimao Chen. The Role of Environmental Factors on the Fishery Catch of the Squid Uroteuthis chinensis in the Pearl River Estuary, China. Journal of Marine Science and Engineering. 2021; 9 (2):131.

Chicago/Turabian Style

Dongliang Wang; Lijun Yao; Jing Yu; Pimao Chen. 2021. "The Role of Environmental Factors on the Fishery Catch of the Squid Uroteuthis chinensis in the Pearl River Estuary, China." Journal of Marine Science and Engineering 9, no. 2: 131.

Conference paper
Published: 25 November 2020 in IOP Conference Series: Earth and Environmental Science
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China's offshore habitats are seriously degraded, leading to continuous decrease in fishery resources. Marine ranching, which can not only conserve diverse fishery resources, but also restore the ecological environment, play an important role in the harmonious development of China's marine fishery resources and offshore ecosystems. In this study, the definition and methods of the major technologies for the construction of marine ranching were introduced, their application in various sea areas were reviewed, and combined with the development stage of marine pasture in China, the problems faced by marine pasture in research foundation, scientific and technological level and supporting development in China were expounded. The development trend and research direction of marine pasture technology in China are prospected. Suggestions for the improvement of marine-ranching technologies in the future were proposed also.

ACS Style

Jing Yu; Dongliang Wang; Pimao Chen. Progress of Marine Ranching Technologies in China. IOP Conference Series: Earth and Environmental Science 2020, 598, 012035 .

AMA Style

Jing Yu, Dongliang Wang, Pimao Chen. Progress of Marine Ranching Technologies in China. IOP Conference Series: Earth and Environmental Science. 2020; 598 (1):012035.

Chicago/Turabian Style

Jing Yu; Dongliang Wang; Pimao Chen. 2020. "Progress of Marine Ranching Technologies in China." IOP Conference Series: Earth and Environmental Science 598, no. 1: 012035.

Journal article
Published: 24 November 2020 in Journal of Marine Science and Engineering
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The spatiotemporal distribution of fishing grounds in the Beibu Gulf and its relationship with marine environment were analyzed using the survey data of light falling-net vessels and satellite remote sensing data including sea surface temperature (SST), chlorophyll a concentration (Chl a) and net primary production (NPP), based on the generalized additive model (GAM) and the center of gravity (COG) of fishing grounds. The results showed that the total deviance explained by GAM for the catch per unit effort (CPUE) in the Beibu Gulf was 42.9%, in which SST was the most important influencing factor on CPUE, with a relative contribution of 40%; followed by latitude, Chl a, month and NPP, with relative contributions of 25.2%, 19%, 10.4% and 5.4%, respectively. Fishing grounds in the Beibu Gulf were mainly distributed in waters with SST of 27–29 °C, Chl a of 0.5–1.5 mg·m−3 and NPP of 500–700 mg·m−2·d−1. Light falling-net fishing grounds were concentrated in waters with latitude of 18.5° N and 20–20.25° N. There was a significant correlation between the mean latitude of optimum NPP and the latitudinal COG of CPUE, with the R2 being 0.91. These were connected with environmental factors such as the northeast monsoon that began in autumn and winter, warm pools near 19° N and local upwelling in the Beibu Gulf.

ACS Style

Yanfeng Wang; Lijun Yao; Pimao Chen; Jing Yu; Qia’Er Wu. Environmental Influence on the Spatiotemporal Variability of Fishing Grounds in the Beibu Gulf, South China Sea. Journal of Marine Science and Engineering 2020, 8, 957 .

AMA Style

Yanfeng Wang, Lijun Yao, Pimao Chen, Jing Yu, Qia’Er Wu. Environmental Influence on the Spatiotemporal Variability of Fishing Grounds in the Beibu Gulf, South China Sea. Journal of Marine Science and Engineering. 2020; 8 (12):957.

Chicago/Turabian Style

Yanfeng Wang; Lijun Yao; Pimao Chen; Jing Yu; Qia’Er Wu. 2020. "Environmental Influence on the Spatiotemporal Variability of Fishing Grounds in the Beibu Gulf, South China Sea." Journal of Marine Science and Engineering 8, no. 12: 957.

Journal article
Published: 15 August 2020 in Journal of Marine Science and Engineering
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Spawning grounds occupy an important position in the supplementary population of fishery resources, especially in Western Guangdong waters (WGWs) in the northern South China Sea (SCS), where fishery resources are being depleted. This study investigated the environmental effects on the spatiotemporal variability of spawning grounds in WGWs, on the basis of generalized additive models (GAMs) and central spawning-ground gravity (CoSGG) by using satellite and in situ observations. Results showed that 57.2% of the total variation in fish-egg density in WGWs was explained. On the basis of stepwise GAMs, the most important factor was sea surface salinity (SSS), with a contribution of 32.1%, followed by sea surface temperature (SST), water depth, month, and chlorophyll a concentration (Chl-a), with contributions of 10.7%, 8.8%, 2.6%, and 2.6%, respectively. Offshore distance had slight influence on the model, explaining approximately 0.4% of the variation in fish-egg density. In summary, fish eggs in WGWs were mainly distributed in the area with SSS of 32.0–34.0 Practical Salinity Unit (PSU), SST of 24–27 °C, and depth of 0–18 m. CoSGG shifted eastwards by 0.38° N and northwards by 0.26° E from April to June. The distribution of spawning grounds in the WGW was affected by the Western Guangdong coastal current (WGCC), cyclonic circulation, the SCS warm current (SCSWC), and changes in the habitat environment (such as SST). Fish in WGWs tend to spawn in areas with a high seabed slope and steep terrain (near the Qiongzhou Strait).

ACS Style

Yao Lu; Jing Yu; Zhaojin Lin; Pimao Chen. Environmental Influence on the Spatiotemporal Variability of Spawning Grounds in the Western Guangdong Waters, South China Sea. Journal of Marine Science and Engineering 2020, 8, 607 .

AMA Style

Yao Lu, Jing Yu, Zhaojin Lin, Pimao Chen. Environmental Influence on the Spatiotemporal Variability of Spawning Grounds in the Western Guangdong Waters, South China Sea. Journal of Marine Science and Engineering. 2020; 8 (8):607.

Chicago/Turabian Style

Yao Lu; Jing Yu; Zhaojin Lin; Pimao Chen. 2020. "Environmental Influence on the Spatiotemporal Variability of Spawning Grounds in the Western Guangdong Waters, South China Sea." Journal of Marine Science and Engineering 8, no. 8: 607.

Research article
Published: 29 January 2019 in PLOS ONE
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In the South China Sea (SCS), Sthenoteuthis oualaniensis (S. oualaniensis) generally has the highest stock density in spring and occupies an important position in fisheries. The responses of S. oualaniensis to marine environments in the north-central SCS in spring (March to May) from 2006 to 2010 were analyzed using satellite and in situ observations, with generalized additive models (GAMs). A high proportion variation in catch per unit effort (CPUE) was explained by environmental variables, including sea surface temperature (SST; explaining 13.8%) and the interaction between SST and chlorophyll a (Chl-a) concentration (explaining 16.9%). SSTs within the range of 24–28°C and Chl-a concentrations within 0.10–0.35 mg/m3 had positive effects on S. oualaniensis CPUE, and SST within 28–29.5°Cand Chl-a concentrations within 0.05–0.20 mg/m3 had negative effects. In addition, the response time of the maximum standardized catch per unit effort (SCPUE) in May to the maximum Chl-a in March was approximately six ten-day time step. The higher Chl-a and smaller stock size of S. oualaniensis in early March 2008 were partly associated with climatic anomalies caused by La Niña in spring and the limitation of S. oualaniensisby low temperature in 2008. The findings in this study can help better protect and manage S. oualaniensis resources in the SCS.

ACS Style

Jing Yu; Qiwei Hu; Danling Tang; Hui Zhao; Pimao Chen. Response of Sthenoteuthis oualaniensis to marine environmental changes in the north-central South China Sea based on satellite and in situ observations. PLOS ONE 2019, 14, e0211474 .

AMA Style

Jing Yu, Qiwei Hu, Danling Tang, Hui Zhao, Pimao Chen. Response of Sthenoteuthis oualaniensis to marine environmental changes in the north-central South China Sea based on satellite and in situ observations. PLOS ONE. 2019; 14 (1):e0211474.

Chicago/Turabian Style

Jing Yu; Qiwei Hu; Danling Tang; Hui Zhao; Pimao Chen. 2019. "Response of Sthenoteuthis oualaniensis to marine environmental changes in the north-central South China Sea based on satellite and in situ observations." PLOS ONE 14, no. 1: e0211474.