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Seasonal and ontogenic variations of metal content in the European pilchard (Sardina pilchardus) in northwestern African waters
Environmental Pollution ( IF 6.792 ) Pub Date : 2020-06-29 , DOI: 10.1016/j.envpol.2020.115113
Enrique Lozano-Bilbao; Gonzalo Lozano; Sebastian Jiménez; Alba Jurado-Ruzafa; Arturo Hardisson; Carmen Rubio; Dailos González Weller; Soraya Paz; Ángel J. Gutiérrez

Marine fishes are exposed to great human-induced alterations due to the indiscriminate discharges into the sea, increasing marine pollution. For this study, 324 specimens of Sardina pilchardus from the Canary Islands were analized during a period of 2 years (June 2016 to May 2018). The concentration of 11 metals and trace elements (Al, B, Cd, Cr, Cu, Fe, Li, Ni, Pb, V and Zn) was determined in each individual using the Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) technique. Statistical analyses were carried out considering the following factors: oceanographic season, maturity of the gonads in the seasons, size of the specimens. Sardina pilchardus specimens captured in the hot season presented higher Ni, Li and Pb levels than the specimens caught in the cold season. Immature specimens had higher concentration in more metals than the mature specimens. This fact may be due to the fact that these specimens require a much higher metabolic rate due to their growth and do not detoxify like mature specimens. Significant differences were found in the concentration of metals in all the analyzes performed.
更新日期:2020-06-29

 

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