Nowosad Joanna, Kucharczyk Dariusz, Szmyt Mariusz, Łuczynska Joanna, Tamás Müller, Horváth László
Department of Ichthyology and Aquaculture, Faculty of Animal Bioengineering, University of Warmia and Mazury, 10-719 Olsztyn, Poland.
ChemProf, 11-041 Olsztyn, Poland.
Animals (Basel). 2021 Apr 5;11(4):1027. doi: 10.3390/ani11041027.
This study determined the contents of cadmium (Cd) in the muscles, ovaries, and eggs of silver female European eels. The analysis of cadmium content was performed on female European eels caught during commercial fishing in freshwater in Warmia and Mazury (Poland), and then subjected to artificial maturation and ovulation processing under controlled conditions. The content of cadmium (Cd) in the tissues was determined by flameless atomic spectrometry using an electrothermal atomizer. The analysis showed statistically significant differences between the cadmium content in the muscles, ovaries, and eggs ( < 0.05) of female European eels. The lowest cadmium content was found in the muscle tissue (0.0012 ± 0.0001 mg kg wet weight) and the highest in eggs (after ovulation) (0.0038 ± 0.0007 mg kg wet weight). Moreover, a relationship was found between the cadmium content in the muscle tissue and the ovaries ( = 0.673; = 0.0117) in the same fish. The movement of cadmium from tissues to oocytes may indicate a significant problem concerning this heavy metal content in the reproduction of European eel.
本研究测定了雌性欧洲银鳗肌肉、卵巢和鱼卵中的镉（Cd）含量。对在波兰瓦尔米亚-马祖里地区淡水商业捕捞中捕获的雌性欧洲银鳗进行镉含量分析，然后在可控条件下对其进行人工成熟和排卵处理。采用电热原子化器通过无火焰原子光谱法测定组织中的镉（Cd）含量。分析表明，雌性欧洲银鳗肌肉、卵巢和鱼卵中的镉含量存在统计学显著差异（<0.05）。肌肉组织中的镉含量最低（0.0012±0.0001毫克/千克湿重），鱼卵（排卵后）中的镉含量最高（0.0038±0.0007毫克/千克湿重）。此外，在同一条鱼中，发现肌肉组织和卵巢中的镉含量之间存在相关性（=0.673；=0.0117）。镉从组织向卵母细胞的转移可能表明欧洲鳗鲡繁殖过程中这种重金属含量存在重大问题。
