Relationships between environmental variables and spatial and temporal distribution of jack mackerel (Trachurus japonicus) in the Beibu Gulf, South China Sea
The jack mackerel (Trachurus japonicus) is both a dominant pelagic fish species and an important fishing target in the Beibu Gulf, South China Sea. However, the resource status of this species fluctuates dramatically, and it has recently been added to a “red list” of threatened species of the Intern...
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| Format: | Article |
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PeerJ Inc.
2021-11-01
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| Online Access: | https://peerj.com/articles/12337.pdf |
| _version_ | 1797421840074801152 |
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| author | Yuting Feng Haiyi Shi Gang Hou Hui Zhao Changming Dong |
| author_facet | Yuting Feng Haiyi Shi Gang Hou Hui Zhao Changming Dong |
| author_sort | Yuting Feng |
| collection | DOAJ |
| description | The jack mackerel (Trachurus japonicus) is both a dominant pelagic fish species and an important fishing target in the Beibu Gulf, South China Sea. However, the resource status of this species fluctuates dramatically, and it has recently been added to a “red list” of threatened species of the International Union for Conservation of Nature (IUCN). Despite its economic importance and decreasing population status, limited research on its spatiotemporal distribution has been undertaken over the last decades. In order to evaluate the most crucial factors that influence the spatiotemporal variability of T. japonicus and to determine GAM performance and predictability, we analyze catch per unit effort (CPUE) of T. japonicus from Beibu Gulf over four seasons (months) from 2013 to 2014. A generalized additive model (GAMs) is populated with water depth and remotely sensed sea surface temperature (SST), sea surface salinity (SSS), sea surface chlorophyll-a concentration (Chl-a) and sea level anomaly (SLA). The CPUE of T. japonicus varies seasonally, with higher CPUE in summer and autumn than in spring and winter, and the highest CPUE in summer. GAM results explain 57% of the deviation explained in CPUE, with the most important variables being SLA, Month, Depth, SSS, and SST , each explaining 21.2%, 18.7%, 10.7%, 5.1%, and 1.3% of the variation in CPUE, respectively. This species occurs mainly between 50 and 75 m depth, SSS values 32.3–33.5 PSU and SST 25–30.5 °C. High CPUE sites occur near SLA ≤ 0 m, on the edge of cold eddies, and there is a certain catch near the sea surface with SLA ≥ 0 m. The spatial and temporal distribution of T. japonicus is affected by the season and the marine hydrological environment. This study might contribute to a better understanding of the distributional patterns of T. japonicus as well as provide a basis for sustainable management in the Beibu Gulf. |
| first_indexed | 2024-03-09T07:23:17Z |
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| language | English |
| last_indexed | 2024-03-09T07:23:17Z |
| publishDate | 2021-11-01 |
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| spelling | doaj.art-b9765d5fff444215ad996e5a636074492023-12-03T07:14:01ZengPeerJ Inc.PeerJ2167-83592021-11-019e1233710.7717/peerj.12337Relationships between environmental variables and spatial and temporal distribution of jack mackerel (Trachurus japonicus) in the Beibu Gulf, South China SeaYuting Feng0Haiyi Shi1Gang Hou2Hui Zhao3Changming Dong4Guangdong Ocean University, Faculty of Chemistry and Environment Science, Zhanjiang, ChinaGuangdong Ocean University, Faculty of Chemistry and Environment Science, Zhanjiang, ChinaGuangdong Ocean University, Faculty of Chemistry and Environment Science, Zhanjiang, ChinaGuangdong Ocean University, Faculty of Chemistry and Environment Science, Zhanjiang, ChinaSouthern Marine Science and Engineering Guangdong Laboratory, Zhuhai, ChinaThe jack mackerel (Trachurus japonicus) is both a dominant pelagic fish species and an important fishing target in the Beibu Gulf, South China Sea. However, the resource status of this species fluctuates dramatically, and it has recently been added to a “red list” of threatened species of the International Union for Conservation of Nature (IUCN). Despite its economic importance and decreasing population status, limited research on its spatiotemporal distribution has been undertaken over the last decades. In order to evaluate the most crucial factors that influence the spatiotemporal variability of T. japonicus and to determine GAM performance and predictability, we analyze catch per unit effort (CPUE) of T. japonicus from Beibu Gulf over four seasons (months) from 2013 to 2014. A generalized additive model (GAMs) is populated with water depth and remotely sensed sea surface temperature (SST), sea surface salinity (SSS), sea surface chlorophyll-a concentration (Chl-a) and sea level anomaly (SLA). The CPUE of T. japonicus varies seasonally, with higher CPUE in summer and autumn than in spring and winter, and the highest CPUE in summer. GAM results explain 57% of the deviation explained in CPUE, with the most important variables being SLA, Month, Depth, SSS, and SST , each explaining 21.2%, 18.7%, 10.7%, 5.1%, and 1.3% of the variation in CPUE, respectively. This species occurs mainly between 50 and 75 m depth, SSS values 32.3–33.5 PSU and SST 25–30.5 °C. High CPUE sites occur near SLA ≤ 0 m, on the edge of cold eddies, and there is a certain catch near the sea surface with SLA ≥ 0 m. The spatial and temporal distribution of T. japonicus is affected by the season and the marine hydrological environment. This study might contribute to a better understanding of the distributional patterns of T. japonicus as well as provide a basis for sustainable management in the Beibu Gulf.https://peerj.com/articles/12337.pdfTrachurus japonicusEnvironment factorsRemote sensingSpatiotemporaldistributionGeneralized additive modelsBeibu Gulf |
| spellingShingle | Yuting Feng Haiyi Shi Gang Hou Hui Zhao Changming Dong Relationships between environmental variables and spatial and temporal distribution of jack mackerel (Trachurus japonicus) in the Beibu Gulf, South China Sea PeerJ Trachurus japonicus Environment factors Remote sensing Spatiotemporaldistribution Generalized additive models Beibu Gulf |
| title | Relationships between environmental variables and spatial and temporal distribution of jack mackerel (Trachurus japonicus) in the Beibu Gulf, South China Sea |
| title_full | Relationships between environmental variables and spatial and temporal distribution of jack mackerel (Trachurus japonicus) in the Beibu Gulf, South China Sea |
| title_fullStr | Relationships between environmental variables and spatial and temporal distribution of jack mackerel (Trachurus japonicus) in the Beibu Gulf, South China Sea |
| title_full_unstemmed | Relationships between environmental variables and spatial and temporal distribution of jack mackerel (Trachurus japonicus) in the Beibu Gulf, South China Sea |
| title_short | Relationships between environmental variables and spatial and temporal distribution of jack mackerel (Trachurus japonicus) in the Beibu Gulf, South China Sea |
| title_sort | relationships between environmental variables and spatial and temporal distribution of jack mackerel trachurus japonicus in the beibu gulf south china sea |
| topic | Trachurus japonicus Environment factors Remote sensing Spatiotemporaldistribution Generalized additive models Beibu Gulf |
| url | https://peerj.com/articles/12337.pdf |
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