Fine-scale variability in otolith chemistry: Application to the life history analysis of Pacific cod (Gadus macrocephalus) in the Yellow Sea
文献类型： 外文期刊
作者： Wu, Rui 1 ; Li, Jianchao 1 ; Zhang, Chi 1 ; Pan, Xindong 1 ; Jiang, Tao 4 ; Yang, Jian 4 ; Liu, Shude 5 ; Tian, Yongjun 1 ;
作者机构： 1.Ocean Univ China, Key Lab Mariculture, Minist Educ, Qingdao 266003, Peoples R China
2.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Qingdao 266100, Peoples R China
3.Pilot Natl Lab Marine Sci & Technol, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266003, Peoples R China
4.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Fishery Ecol Environm Assessment & Resour, Wuxi 214081, Jiangsu, Peoples R China
5.Shandong Hydrobios Resources Conservat & Manageme, Yantai 264000, Peoples R China
关键词： Gadus macrocephalus; Otolith; Elemental signature; Spawning ground; Settlement
期刊名称：ESTUARINE COASTAL AND SHELF SCIENCE （ 影响因子：2.929； 五年影响因子：3.329 ）
ISSN： 0272-7714
年卷期： 2021 年 257 卷
页码：
收录情况： SCI
摘要： The Yellow Sea is the southwestern limit of the distribution of Pacific cod (Gadus macrocephalus), a typical cold water and commercially important fish in the North Pacific. The catch of Pacific cod in the Yellow Sea has increased gradually in recent years, and has received substantial attention. To explore the use of otolith chemistry in the characterization of different spawning grounds and crucial life history events, a total of 60 specimens of Pacific cod were obtained from October 2016 to August 2017. The contents of barium (Ba) and strontium (Sr) in otoliths from the core to the edge along the ventral side were determined using laser ablationinductively coupled plasma-mass spectrometry. Based on hierarchical cluster analysis (HCA), the specimens were assigned to two groups based on the ratio of Ba:Ca at the core. The various patterns of core-to-edge Ba:Ca inferred using a linear mixed-effect (LMM) model suggested differences in the spawning ground environments for Pacific cod in the Yellow Sea, and step changes found in the Sr:Ca ratio, and a corresponding check observed in otolith images suggest that the settlement of Pacific cod occurred approximately 80-120 days after hatching. The nature of the data prevents firm conclusions being drawn from the data available at present, but the significant differences in certain elements among individuals and the association with crucial life history events in Pacific cod are noteworthy.
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