ORIGINAL PAPERS EFFECT OF CULTURE CONDITIONS ON MAGNESIUM AND ZINC CONCENTRATIONS IN MUSCLES OF FRESHWATER FISH*

• Main Authors: J. Elementol, Ewa Brucka-jastrzêbska, Dorota Kawczuga, Monika Rajkowska
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Key words; common carp; rainbow trout; Siberian sturgeon; northern; grass carp; Yvon
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.1145; http://yadda.icm.edu.pl/yadda/element/bwmeta1.element.agro-article-7c061738-71f9-4a4f-baf7-3afbe0ad546b/c/jelem.2010.15.2.01.pdf

The aim of the study was to estimate the effect of culture conditions and culture site on magnesium (Mg) and zinc (Zn) concentrations in freshwater fish. The study encompas-sed dorsal muscles in five fish species: common carp (Cyprinus carpio L.), rainbow trout (Oncorhynchus mykiss Walbaum) and Siberian sturgeon (Acipenser baeri Brandt), northern pike (Esox lucius L.) and grass carp (Ctenopharyngodon idella Valenciennes). A total of 125 fish comprised 25 individuals of each species, aged from 6, 9, and 12 months. The fish were cultured in privately owned fish breeding ponds (Western Pomera-nia, Poland). For chemical and biochemical assays, samples of dorsal muscles were taken from each fish. Tissue samples were wet mineralised in concentrated HNO3 in a CEM MDS 2000 microwave oven. Magnesium and zinc concentrations were determined by in-ductively coupled plasma atomic emission spectrometry (ICP-MS) in a Jobin Yvon type JY-24 apparatus. The pursuit of the research we had an approval of the Polish Local Ethics Committee nr 9/05. The magnesium concentration in the dorsal muscles ranged from 95.3÷347.6 mg kg–1 w.w. The highest Mg concentration was found in rainbow trout 240 (347.6±32.2 mg kg–1 w.w.), and the lowest in grass carp (95.3±11.3 mg kg–1 w.w.). Zinc concentration varied from 6.7÷98.8 mg kg–1 w.w. The highest was found in the muscles of Siberian sturgeon (98.8±0.4 mg kg–1 w.w.), and the lowest in rainbow trout (6.7±0.7 mg kg–1 w.w.). It was found that the breeding place significantly affected the Zn and Mg con-centrations in the muscle tissue among individual freshwater fish species. The magnesium and zinc concentrations were also significantly affected by the type of feed.