Stability of population genetic structure in large yellow croaker (Larimichthys crocea): Insights from temporal, geographical factors, and artificial restocking processes

Author:

Yao Ji‐Xiang1ORCID,Lin Hung‐Du2ORCID,Wu Li‐Sheng1,Wu Li‐Na1,Yuan Ji‐Gui1,Ding Shao‐Xiong1

Affiliation:

1. State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences Xiamen University Xiamen China

2. The Affiliated School of National Tainan First Senior High School Tainan Taiwan

Abstract

AbstractDespite concerns about overfishing and the potential impact of release programs on wild populations, our study of 3116 individuals from 13 wild populations and 2787 individuals from two cultured populations in Zhejiang and Fujian provinces spanning 2008 to 2023 reveals a relatively stable genetic diversity in Larimichthys crocea. Surprisingly, the genetic diversity of wild large yellow croaker populations has remained consistent over the years, suggesting minimal influence from population declines due to overfishing. With the exception of populations in Sansha Bay and Luoyuan Bay, no significant genetic differences were observed among wild populations, indicating a single panmictic genetic population across the East and South China seas. Notably, significant genetic differentiation exists between cultured and wild populations, suggesting a possible limited genetic adaptation of cultured‐released individuals to the wild environment. The genetic differences observed between the Sansha Bay, with its adjacent Luoyuan Bay populations, and other wild populations underscore the dual effects of habitat environment and farming activities on the genetic structure of large yellow croaker. Our findings suggest that, despite declines in population numbers due to overfishing and expands extensive cultured releases, the genetic diversity of L. crocea populations remains largely unaffected. Moreover, the L. crocea population along the Chinese coast appears to form a single panmictic population with considerable genetic diversity.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Publisher

Wiley

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