Speculation of migration routes of <i>Larimichthys crocea</i> in the East China Sea based on otolith microchemistry

Xu Yongjiu; Tang Xinyue; Yan Xiaojun; Song Weihua; Zhou Yongdong; Zhang Hongliang; Jiang Rijin; Yang Jian; Jiang Tao

doi:10.12284/hyxb2023126

Volume 45 Issue 9

Sep. 2023

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Xu Yongjiu，Tang Xinyue，Yan Xiaojun, et al. Speculation of migration routes of Larimichthys crocea in the East China Sea based on otolith microchemistry[J]. Haiyang Xuebao，2023, 45(9)：128–140 doi: 10.12284/hyxb2023126

Citation:

Xu Yongjiu，Tang Xinyue，Yan Xiaojun, et al. Speculation of migration routes of Larimichthys crocea in the East China Sea based on otolith microchemistry[J]. Haiyang Xuebao，2023, 45(9)：128–140 doi: 10.12284/hyxb2023126

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Speculation of migration routes of Larimichthys crocea in the East China Sea based on otolith microchemistry

doi: 10.12284/hyxb2023126

1.
School of Fisheries, Zhejiang Ocean University, Zhoushan 316022, China
2.
National Engineering Research Center For Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
3.
Marine Fisheries Research Institute of Zhejiang, Zhoushan 316021, China
4.
Fresh Water Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214128, China

Received Date: 2023-04-08
Rev Recd Date: 2023-07-31

Available Online: 2023-09-07

Publish Date: 2023-09-30

Abstract

Abstract

In recent years, large yellow croaker (LYC) has been caught with high abundance in the East China Sea (ECS), which raises concerns about the conservation of LYC resources. We collected LYC samples from spawning grounds and wintering grounds in the offshore Zhejiang from 2020 to 2022. In order to find out the migration route of LYC in the ECS, we made use of otolith microchemical elements by LA-ICP-MS analysis, combined with the clustering analysis and PCA of trace elements such as Ba/Ca, to classify different LYC groups. With the age characteristics of otolith, the habitat patterns of LYC group was studied, and the updated migration route of LYC was speculated. The results showed that groups with Ba/Ca $\leqslant$ 0.004 2 was inhabited in the marine region. That with Ba/Ca $\geqslant$ 0.008 1 was inhabited in the estuary region, and that with 0.004 2 < Ba/Ca < 0.008 1 was inhabited in the mixed (estuary and oceanic) habitat. The five group types of LYC were: (1) offshore spawning, short-term mixed waters inhabited (accounting for 22.2%); (2) offshore spawning, periodically back and forth with mixed water inhabited (accounting for 15.6%); (3) offshore spawning, feeding and nursering in estuary waters, and wintering inhabited in the open sea (31.1%); (4) estuary spawning, nursering in the mixed waters, overwintering inhabited in the open sea (6.7%); (5) shortly spawning in the mixed waters, most of the time inhabited in the open ocean (24.4%). PCA was performed with Ba/Ca core, peak and edge values of all samples, and the results showed that samples from five groups were evenly distributed on both sides of the first axis: G1, G2 and G5 groups, which spent most of their time in the ocean, and G3 and G4 groups, which were heavily influenced by terrestrial sources. At the same time, the PCA results also showed that all the samples appeared nearly synchronously near the island or reefs, indicating that populations in the open sea, offshore and estuary waters may mix due to factors such as migration, indicating the importance of Zhoushan offshore waters for LYC nursering and spawning. This study provides a certain basis for the migration history of the LYC in the ECS between its coastal spawning, feeding grounds and its overwintering grounds in the open sea, as well as for the speculation of its migration routes.
- large yellow croaker (Larimichthys crocea),
- migration history,
- otolith,
- microchemistry,
- Zhejiang offshore waters,
- open waters of wintering ground

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References(19)

References

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