TY  - JOUR
AU  - Jarić, Ivan
AU  - Lenhardt, Mirjana
AU  - Pallon, Jan
AU  - Elfman, Mikael
AU  - Kalauzi, Aleksandar
AU  - Suciu, Radu
AU  - Cvijanović, Gorčin
AU  - Ebenhard, Torbjorn
PY  - 2011
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/451
AB  - 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, 7.08x10(-3), 8.98x10(-3) and 9.90x10(-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.
PB  - Springer, New York
T2  - Environmental Biology of Fishes
T1  - Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays
EP  - 181
IS  - 2
SP  - 171
VL  - 90
DO  - 10.1007/s10641-010-9728-4
ER  - 

@article{
author = "Jarić, Ivan and Lenhardt, Mirjana and Pallon, Jan and Elfman, Mikael and Kalauzi, Aleksandar and Suciu, Radu and Cvijanović, Gorčin and Ebenhard, Torbjorn",
year = "2011",
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, 7.08x10(-3), 8.98x10(-3) and 9.90x10(-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.",
publisher = "Springer, New York",
journal = "Environmental Biology of Fishes",
title = "Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays",
pages = "181-171",
number = "2",
volume = "90",
doi = "10.1007/s10641-010-9728-4"
}

Jarić, I., Lenhardt, M., Pallon, J., Elfman, M., Kalauzi, A., Suciu, R., Cvijanović, G.,& Ebenhard, T.. (2011). Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays. in Environmental Biology of Fishes
Springer, New York., 90(2), 171-181.
https://doi.org/10.1007/s10641-010-9728-4

Jarić I, Lenhardt M, Pallon J, Elfman M, Kalauzi A, Suciu R, Cvijanović G, Ebenhard T. Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays. in Environmental Biology of Fishes. 2011;90(2):171-181.
doi:10.1007/s10641-010-9728-4 .

Jarić, Ivan, Lenhardt, Mirjana, Pallon, Jan, Elfman, Mikael, Kalauzi, Aleksandar, Suciu, Radu, Cvijanović, Gorčin, Ebenhard, Torbjorn, "Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays" in Environmental Biology of Fishes, 90, no. 2 (2011):171-181,
https://doi.org/10.1007/s10641-010-9728-4 . .

TY  - JOUR
AU  - Jarić, Ivan
AU  - Lenhardt, Mirjana
AU  - Cvijanović, Gorčin
AU  - Ebenhard, T.
PY  - 2009
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/344
AB  - The presence of Atlantic sturgeon (Acipenser sturio) and ship sturgeon (Acipenser nudiventris) in the Danube has been known through only occasional, chance sightings; significant uncertainty remains as to whether these species are already extinct or still present in the Danube River basin. In this study, five different statistical methods were applied for assessment of their extinction probability. All methods provided a significant probability that the Atlantic sturgeon is extinct, with extinction having occurred somewhere between 1966 and 1970. Although the applied methods provided different results, all indicated that the ship sturgeon is probably still present, but that extinction may occur within a few decades. Sensitivity analyses of these statistical methods projected that new sightings of ship sturgeon in the coming years would not extend the length of extinction by more than a few years. The best management approach for these two species, given the lack of knowledge on their presence in the Danube River basin, could be to apply all feasible protection measures for the other four Danube sturgeon species. These measures could at the same time provide protection for these two species, presuming they are not already extinct or beyond recovery.
PB  - Wiley, Hoboken
T2  - Journal of Applied Ichthyology
T1  - Acipenser sturio and Acipenser nudiventris in the Danube - extant or extinct?
EP  - 141
IS  - 2
SP  - 137
VL  - 25
DO  - 10.1111/j.1439-0426.2009.01227.x
ER  - 

@article{
author = "Jarić, Ivan and Lenhardt, Mirjana and Cvijanović, Gorčin and Ebenhard, T.",
year = "2009",
abstract = "The presence of Atlantic sturgeon (Acipenser sturio) and ship sturgeon (Acipenser nudiventris) in the Danube has been known through only occasional, chance sightings; significant uncertainty remains as to whether these species are already extinct or still present in the Danube River basin. In this study, five different statistical methods were applied for assessment of their extinction probability. All methods provided a significant probability that the Atlantic sturgeon is extinct, with extinction having occurred somewhere between 1966 and 1970. Although the applied methods provided different results, all indicated that the ship sturgeon is probably still present, but that extinction may occur within a few decades. Sensitivity analyses of these statistical methods projected that new sightings of ship sturgeon in the coming years would not extend the length of extinction by more than a few years. The best management approach for these two species, given the lack of knowledge on their presence in the Danube River basin, could be to apply all feasible protection measures for the other four Danube sturgeon species. These measures could at the same time provide protection for these two species, presuming they are not already extinct or beyond recovery.",
publisher = "Wiley, Hoboken",
journal = "Journal of Applied Ichthyology",
title = "Acipenser sturio and Acipenser nudiventris in the Danube - extant or extinct?",
pages = "141-137",
number = "2",
volume = "25",
doi = "10.1111/j.1439-0426.2009.01227.x"
}

Jarić, I., Lenhardt, M., Cvijanović, G.,& Ebenhard, T.. (2009). Acipenser sturio and Acipenser nudiventris in the Danube - extant or extinct?. in Journal of Applied Ichthyology
Wiley, Hoboken., 25(2), 137-141.
https://doi.org/10.1111/j.1439-0426.2009.01227.x

Jarić I, Lenhardt M, Cvijanović G, Ebenhard T. Acipenser sturio and Acipenser nudiventris in the Danube - extant or extinct?. in Journal of Applied Ichthyology. 2009;25(2):137-141.
doi:10.1111/j.1439-0426.2009.01227.x .

Jarić, Ivan, Lenhardt, Mirjana, Cvijanović, Gorčin, Ebenhard, T., "Acipenser sturio and Acipenser nudiventris in the Danube - extant or extinct?" in Journal of Applied Ichthyology, 25, no. 2 (2009):137-141,
https://doi.org/10.1111/j.1439-0426.2009.01227.x . .