First assessment of mercury bioaccumulation in jumbo squid (Dosidicus gigas) off Peru: The impact of sized group, sex, and feeding ecology

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management Pub Date : 2025-03-22 DOI:10.1016/j.ocecoaman.2025.107641

Zhenfang Zhao , Guanyu Hu , Bilin Liu , Long Chen , Ziyue Chen , Xinjun Chen

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Abstract

Jumbo squid, Dosidicus gigas, play a crucial role in marine ecosystems and are an important commercial species in the East Pacific. This study investigated the bioaccumulation characteristics of total mercury (THg) in jumbo squid (Dosidicus gigas) from the eastern Pacific Ocean, analyzing the influence of factors such as mantle length, sex, and feeding ecology. We analyzed the muscle tissue of 108 squid samples (small, medium, and large-sized groups) collected from June to December 2020. THg concentrations increased with mantle length, but all values remained within Chinese national edible standards. Females in medium and large-sized groups had significantly higher THg concentrations than males. Stable isotope (δ¹³C and δ¹⁵N) and fatty acid analyses revealed the feeding habits and trophic levels of different groups and their correlation with THg levels. Principal component analysis (PCA) identified body weight, δ¹³C, Eicosapentaenoic Acid, and THg as significant contributors to the first principal component, while Arachidonic Acid contributed to the second. Correlations between THg, δ¹³C, δ¹⁵N, and the Docosahexaenoic Acid/Eicosatetraenoic Acid ratio varied among groups. These findings highlight the importance of pollutant bioaccumulation research in cephalopods, providing insights into the biogeochemical cycling of pollutants in marine ecosystems. This study not only provides data on mercury levels in the muscles of giant squid, which can help evaluate the health risks of human consumption, but also suggest that future research should focus on the integration of pollutant research with biogeochemical techniques.

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来源期刊

Ocean & Coastal Management 环境科学-海洋学

CiteScore

8.50

自引率

15.20%

发文量

321

审稿时长

60 days

期刊介绍： Ocean & Coastal Management is the leading international journal dedicated to the study of all aspects of ocean and coastal management from the global to local levels. We publish rigorously peer-reviewed manuscripts from all disciplines, and inter-/trans-disciplinary and co-designed research, but all submissions must make clear the relevance to management and/or governance issues relevant to the sustainable development and conservation of oceans and coasts. Comparative studies (from sub-national to trans-national cases, and other management / policy arenas) are encouraged, as are studies that critically assess current management practices and governance approaches. Submissions involving robust analysis, development of theory, and improvement of management practice are especially welcome.