Assessing the resource dynamics of economic fishes in the Dachen Island Marine Ranch in the East China Sea based on size spectrum model

Jiaju ZHANG; Yuru LI; Yajing CHEN; Jiadi YING; Xiaopeng CHENG; Zhenhua WANG; Yingbin WANG

doi:10.1007/s00343-025-5031-2

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Assessing the resource dynamics of economic fishes in the Dachen Island Marine Ranch in the East China Sea based on size spectrum model

Aquaculture and Fisheries | Updated：2026-05-07

- Assessing the resource dynamics of economic fishes in the Dachen Island Marine Ranch in the East China Sea based on size spectrum model
- Journal of Oceanology and Limnology Vol. 44, Issue 2, Pages: 904-919(2026)
- Affiliations：
  
  1.Fisheries College, Zhejiang Ocean University, Zhoushan 316022, China
  2.Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, China
  3.East China Sea Fisheries Research Institute, Shanghai 200082, China
  4.Shanghai Ocean University, Shanghai 201306, China
- Author bio：
  
  yurufly@163.com
  ybwang@zjou.edu.cn
- Funds：
- DOI：10.1007/s00343-025-5031-2
  CLC：
- Received：24 January 2025，
  
  Accepted：12 May 2025，
  
  Online First：23 June 2025，
  
  Published：01 March 2026
- Accepted：
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ZHANG Jiaju,LI Yuru,CHEN Yajing,et al.Assessing the resource dynamics of economic fishes in the Dachen Island Marine Ranch in the East China Sea based on size spectrum model[J].Journal of Oceanology and Limnology,2026,44(02):904-919.
DOI：

ZHANG Jiaju,LI Yuru,CHEN Yajing,et al.Assessing the resource dynamics of economic fishes in the Dachen Island Marine Ranch in the East China Sea based on size spectrum model[J].Journal of Oceanology and Limnology,2026,44(02):904-919. DOI： 10.1007/s00343-025-5031-2.

摘要

Abstract

Marine ranch is a novel paradigm in the transformation of traditional fisheries

which embodies a modern and high-tech approach to increasing marine fishery production and enables the sustainable and efficient exploitation of marine resources. After several decades of development

the industrial model of marine ranch has matured. However

in several developing countries

subsequent management and evaluation remain inadequate. In this study

the Dachen Island Marine Ranch in the East China Sea was used as a case to explore two fishery management strategies. A multi-species size spectrum model (MSSM) was established for the Dachen Island Marine Ranch to simulate fish community dynamics. While considering interspecific interactions

the effectiveness of two management strategies was assessed: (1) altering fishing mortality; and (2) increasing cod-end mesh size. The findings indicate that the change in the fishing mortality of large predators can induce trophic cascade effects

and the large predators have the greatest impact on community structure. In scenarios that simulate fishing mortality for multiple species

competition is shown between two species occupying similar ecological niches. An increase in cod-end mesh size can be observed to decrease bycatch while positively impacting community structure. Our findings suggest that fisheries management reforms should consider the effects of management changes on the entire ecosystem (including environment and biodiversity)

rather than concentrating solely on the long-term yield of fish harvests. A stable ecosystem can yield more products

and long-term sustainable fishery yields are one of them.

关键词

Keywords

references

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