Long-Term Variability of Piscivorous Fish in China Seas Under Climate Change With Implication for Fisheries Management
Due to persistent fishing expansion in the China Seas over the past six decades, fisheries resources have been over-exploited; as a result, exploited fish have become smaller in size and younger in age. Marine piscivorous fish constituted a large portion of Chinese fisheries catch, long-term variabi...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-06-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2021.581952/full |
| _version_ | 1818740989774266368 |
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| author | Dan Liu Yongjun Tian Yongjun Tian Yongjun Tian Shuyang Ma Jianchao Li Peng Sun Zhenjiang Ye Caihong Fu Kuowei Lan Shijie Zhou |
| author_facet | Dan Liu Yongjun Tian Yongjun Tian Yongjun Tian Shuyang Ma Jianchao Li Peng Sun Zhenjiang Ye Caihong Fu Kuowei Lan Shijie Zhou |
| author_sort | Dan Liu |
| collection | DOAJ |
| description | Due to persistent fishing expansion in the China Seas over the past six decades, fisheries resources have been over-exploited; as a result, exploited fish have become smaller in size and younger in age. Marine piscivorous fish constituted a large portion of Chinese fisheries catch, long-term variability of which has rarely been investigated despite intense fishing pressure and climate change. In this study, we attempt to identify their responses to climate change and fishing activities and to provide scientific basis for sustainable exploitation of these resources. Seven taxa from pelagic to demersal species inhabiting either cold-water or warm-water were selected to represent the piscivorous fish assemblage in the China Seas. Total catch of these piscivorous fish in the China Seas increased during the early 1990s, stabilizing around 1.2 million tons after 1997. Principal component analysis (PCA) showed evident interannual-decadal variabilities in the catch of these fish with step changes around 1985/86 and 1997/98. Individual taxa, however, showed different trends in catches with sharks, rays, and lizardfishes manifesting downward trends while Pacific cod, eels, and hairtail increasing. Common dolphinfish and Japanese-Spanish mackerel increased largely in the 1990s but declined slightly during the 2000s. Although there were temporal overlaps between climate change and fishing variabilities, results of gradient forest analyses indicated that fishing effort imposed the most important influence on piscivorous fish. And among all climate variables explored in this study, sea surface temperature (SST) especially that of the East China Sea, had greatest impacts on variations in piscivorous fish catch, which may have been gradually exacerbated by the continued high fishing intensity. In addition, significant changes were identified in the life history traits in the species we evaluated, such as reduced average body sizes and truncated age compositions, strongly indicating the effect of fishing. We therefore advocate precautionary fishery practices under climate change. |
| first_indexed | 2024-12-18T01:49:30Z |
| format | Article |
| id | doaj.art-a87a4361fe2f424c83cec99c22293737 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-18T01:49:30Z |
| publishDate | 2021-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-a87a4361fe2f424c83cec99c222937372022-12-21T21:25:05ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452021-06-01810.3389/fmars.2021.581952581952Long-Term Variability of Piscivorous Fish in China Seas Under Climate Change With Implication for Fisheries ManagementDan Liu0Yongjun Tian1Yongjun Tian2Yongjun Tian3Shuyang Ma4Jianchao Li5Peng Sun6Zhenjiang Ye7Caihong Fu8Kuowei Lan9Shijie Zhou10Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, ChinaKey Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES), Ocean University of China, Qingdao, ChinaLaboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Qingdao, ChinaKey Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, ChinaKey Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, ChinaKey Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, ChinaKey Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, ChinaFisheries and Oceans Canada, Pacific Biological Station, Nanaimo, BC, CanadaDepartment of Environmental Biology and Fisheries Science, National Taiwan Ocean University, Keelung, TaiwanCSIRO Oceans and Atmosphere, Brisbane, QLD, AustraliaDue to persistent fishing expansion in the China Seas over the past six decades, fisheries resources have been over-exploited; as a result, exploited fish have become smaller in size and younger in age. Marine piscivorous fish constituted a large portion of Chinese fisheries catch, long-term variability of which has rarely been investigated despite intense fishing pressure and climate change. In this study, we attempt to identify their responses to climate change and fishing activities and to provide scientific basis for sustainable exploitation of these resources. Seven taxa from pelagic to demersal species inhabiting either cold-water or warm-water were selected to represent the piscivorous fish assemblage in the China Seas. Total catch of these piscivorous fish in the China Seas increased during the early 1990s, stabilizing around 1.2 million tons after 1997. Principal component analysis (PCA) showed evident interannual-decadal variabilities in the catch of these fish with step changes around 1985/86 and 1997/98. Individual taxa, however, showed different trends in catches with sharks, rays, and lizardfishes manifesting downward trends while Pacific cod, eels, and hairtail increasing. Common dolphinfish and Japanese-Spanish mackerel increased largely in the 1990s but declined slightly during the 2000s. Although there were temporal overlaps between climate change and fishing variabilities, results of gradient forest analyses indicated that fishing effort imposed the most important influence on piscivorous fish. And among all climate variables explored in this study, sea surface temperature (SST) especially that of the East China Sea, had greatest impacts on variations in piscivorous fish catch, which may have been gradually exacerbated by the continued high fishing intensity. In addition, significant changes were identified in the life history traits in the species we evaluated, such as reduced average body sizes and truncated age compositions, strongly indicating the effect of fishing. We therefore advocate precautionary fishery practices under climate change.https://www.frontiersin.org/articles/10.3389/fmars.2021.581952/fullChina Seasclimate changelife history traitover-exploitationpiscivorous fishregime shift |
| spellingShingle | Dan Liu Yongjun Tian Yongjun Tian Yongjun Tian Shuyang Ma Jianchao Li Peng Sun Zhenjiang Ye Caihong Fu Kuowei Lan Shijie Zhou Long-Term Variability of Piscivorous Fish in China Seas Under Climate Change With Implication for Fisheries Management Frontiers in Marine Science China Seas climate change life history trait over-exploitation piscivorous fish regime shift |
| title | Long-Term Variability of Piscivorous Fish in China Seas Under Climate Change With Implication for Fisheries Management |
| title_full | Long-Term Variability of Piscivorous Fish in China Seas Under Climate Change With Implication for Fisheries Management |
| title_fullStr | Long-Term Variability of Piscivorous Fish in China Seas Under Climate Change With Implication for Fisheries Management |
| title_full_unstemmed | Long-Term Variability of Piscivorous Fish in China Seas Under Climate Change With Implication for Fisheries Management |
| title_short | Long-Term Variability of Piscivorous Fish in China Seas Under Climate Change With Implication for Fisheries Management |
| title_sort | long term variability of piscivorous fish in china seas under climate change with implication for fisheries management |
| topic | China Seas climate change life history trait over-exploitation piscivorous fish regime shift |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2021.581952/full |
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