Mercury bioaccumulation in the spotted dogfish (Scyliorhinus canicula) from the Atlantic Ocean |
| |
Authors: | JP Coelho H Santos J Falcão ME Pereira MA Pardal |
| |
Institution: | a CESAM/Chemistry Department, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal b IMAR (Institute of Marine Research), Department of Life Sciences, University of Coimbra, Apartado 3046, 3001-401 Coimbra, Portugal c CEF (Centre for Functional Ecology), Department of Life Sciences, University of Coimbra, Apartado 3046, 3001-401 Coimbra, Portugal |
| |
Abstract: | The annual and life-cycle mercury bioaccumulation pattern in selected tissues of the economically relevant Elasmobranchii species Scyliorhinus canicula was studied, and the risks associated with its consumption evaluated.Preferential mercury bioaccumulation occurred in muscle tissue, and followed the order muscle > heart > liver > gills > pancreas. Total mercury in muscle tissue ranged from 0.13 mg kg−1 (wwt) in 1+ year old males to 0.8 mg kg−1 (wwt) in 8+ year old mature females, with no significant differences found between genders, and no clear lifespan bioaccumulation pattern observed, except for mature females. Organic mercury in the muscle ranged from 0.05 mg kg−1 (wwt) to 0.52 mg kg−1 (wwt), corresponding to an average of 70% of total mercury content. In mature females, a significant correlation (R = 0.99, P = 0.01) was found between size and organic mercury fraction, suggesting reproduction as an important factor controlling organic mercury bioaccumulation in the spotted dogfish. |
| |
Keywords: | Mercury Scyliorhinus canicula Metal body distribution Gender differentiation Lifespan bioaccumulation pattern |
本文献已被 ScienceDirect 等数据库收录! |
|