Environmental Biology of Fishes

, Volume 90, Issue 2, pp 171–181

Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays

  • Ivan Jarić
  • Mirjana Lenhardt
  • Jan Pallon
  • Mikael Elfman
  • Aleksandar Kalauzi
  • Radu Suciu
  • Gorčin Cvijanović
  • Torbjörn Ebenhard
Article

Abstract

Sturgeon populations in the Danube River have experienced severe decline during the last several decades, mostly due to the poorly regulated fishery, river fragmentation and water pollution. This study focuses on gaining better understanding of sturgeon life history primarily by addressing the assessment of microelement accumulation in sturgeon pectoral fin rays, especially of strontium and calcium, as a method that can reveal migration patterns of anadromous sturgeons. Analysis was performed on pectoral fin samples of three anadromous Danube sturgeon species (beluga, Russian sturgeon and stellate sturgeon) by the use of a Nuclear Microprobe technique. The most frequent pattern in analyzed samples was represented by a low Sr:Ca ratio in the innermost annuli, followed by an increased ratio in the middle annuli segment, and often with a decreased ratio in the outermost annuli. Probability density estimate has revealed three distinguished maxima of the Sr:Ca ratio, 7.08 × 10−3, 8.98 × 10−3 and 9.90 × 10−3, which might correspond, respectively, to fresh, brackish and saltwater. Although the analysis of the Sr:Ca ratio in sturgeon pectoral fin rays has revealed changes that might indicate probable migration between habitats with different water salinity, further studies are needed for improvement of this method. This study represents the first analysis of this kind that was conducted on sturgeon species from the Black Sea basin.

Keywords

Acipenser Huso Migration patterns Pectoral fin microchemistry Sr:Ca ratio Nuclear microprobe 

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Ivan Jarić
    • 1
  • Mirjana Lenhardt
    • 2
  • Jan Pallon
    • 3
  • Mikael Elfman
    • 3
  • Aleksandar Kalauzi
    • 1
  • Radu Suciu
    • 4
  • Gorčin Cvijanović
    • 1
  • Torbjörn Ebenhard
    • 5
  1. 1.Institute for Multidisciplinary ResearchBelgradeSerbia
  2. 2.Institute for Biological ResearchBelgradeSerbia
  3. 3.Department of Nuclear Physics, Lund Institute of TechnologyLund UniversityLundSweden
  4. 4.Danube Delta National InstituteTulceaRomania
  5. 5.Swedish University of Agricultural Sciences, Swedish Biodiversity Centre (CBM)UppsalaSweden

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