TY  - JOUR
AU  - Subotić, Srđan
AU  - Višnjić-Jeftić, Željka
AU  - Lenhardt, Mirjana
AU  - Krpo-Ćetković, Jasmine
PY  - 2021
UR  - http://acta-zoologica-bulgarica.eu/2021/002427.pdf
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/4449
AB  - Vimba bream individuals (n = 157), obtained from commercial catches in 2016 and 2017 near Belgrade. were analysed to obtain information on growth and condition of this species. The total body length of sampled fish ranged from 248 to 440 mm, while the body weight ranged from 139 to 889 g. Five age classes (from 4+ to 8+) were present in the sample, with predominance of individuals aged 6+. Back-calculated annual length growth was the highest in the first year of life. The total body length defined according to the parameters of the von Bertalanffy growth curve could be calculated at any given time t using 75.07 x (1-e(-0.06x(t+1.73))), and the length-weight relationship - using LogW = 0.010 + 3.02 x logTL. The asymptotic standard body length was SL infinity = 63.86 cm and the phi-prime growth performance index was phi'= 2.53. The highest mean values of Fulton's condition factor were observed in spring of 2016, followed by spring of 2017, and in individuals aged 7+. The seasonal and age-related differences in condition were statistically significant. The lack of data, the degree of endangerment in some European countries, the status of important species for the river continuity restoration and commercial exploitation of this species, emphasise the need for future research.
PB  - Sofia: Institute of Biodiversity and Ecosystem Research – Bulgarian Academy of Sciences
T2  - Acta Zoologica Bulgarica
T1  - Growth and Condition of Vimba Bream Vimba vimba ( L., 1758) (Actinopterygii: Cyprinidae) from Commercial Fisheries in the Danube River near Belgrade, Serbia
IS  - 2
VL  - 73
SP  - 261
EP  - 267
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_4449
ER  - 

@article{
author = "Subotić, Srđan and Višnjić-Jeftić, Željka and Lenhardt, Mirjana and Krpo-Ćetković, Jasmine",
year = "2021",
abstract = "Vimba bream individuals (n = 157), obtained from commercial catches in 2016 and 2017 near Belgrade. were analysed to obtain information on growth and condition of this species. The total body length of sampled fish ranged from 248 to 440 mm, while the body weight ranged from 139 to 889 g. Five age classes (from 4+ to 8+) were present in the sample, with predominance of individuals aged 6+. Back-calculated annual length growth was the highest in the first year of life. The total body length defined according to the parameters of the von Bertalanffy growth curve could be calculated at any given time t using 75.07 x (1-e(-0.06x(t+1.73))), and the length-weight relationship - using LogW = 0.010 + 3.02 x logTL. The asymptotic standard body length was SL infinity = 63.86 cm and the phi-prime growth performance index was phi'= 2.53. The highest mean values of Fulton's condition factor were observed in spring of 2016, followed by spring of 2017, and in individuals aged 7+. The seasonal and age-related differences in condition were statistically significant. The lack of data, the degree of endangerment in some European countries, the status of important species for the river continuity restoration and commercial exploitation of this species, emphasise the need for future research.",
publisher = "Sofia: Institute of Biodiversity and Ecosystem Research – Bulgarian Academy of Sciences",
journal = "Acta Zoologica Bulgarica",
title = "Growth and Condition of Vimba Bream Vimba vimba ( L., 1758) (Actinopterygii: Cyprinidae) from Commercial Fisheries in the Danube River near Belgrade, Serbia",
number = "2",
volume = "73",
pages = "261-267",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_4449"
}

Subotić, S., Višnjić-Jeftić, Ž., Lenhardt, M.,& Krpo-Ćetković, J.. (2021). Growth and Condition of Vimba Bream Vimba vimba ( L., 1758) (Actinopterygii: Cyprinidae) from Commercial Fisheries in the Danube River near Belgrade, Serbia. in Acta Zoologica Bulgarica
Sofia: Institute of Biodiversity and Ecosystem Research – Bulgarian Academy of Sciences., 73(2), 261-267.
https://hdl.handle.net/21.15107/rcub_ibiss_4449

Subotić S, Višnjić-Jeftić Ž, Lenhardt M, Krpo-Ćetković J. Growth and Condition of Vimba Bream Vimba vimba ( L., 1758) (Actinopterygii: Cyprinidae) from Commercial Fisheries in the Danube River near Belgrade, Serbia. in Acta Zoologica Bulgarica. 2021;73(2):261-267.
https://hdl.handle.net/21.15107/rcub_ibiss_4449 .

Subotić, Srđan, Višnjić-Jeftić, Željka, Lenhardt, Mirjana, Krpo-Ćetković, Jasmine, "Growth and Condition of Vimba Bream Vimba vimba ( L., 1758) (Actinopterygii: Cyprinidae) from Commercial Fisheries in the Danube River near Belgrade, Serbia" in Acta Zoologica Bulgarica, 73, no. 2 (2021):261-267,
https://hdl.handle.net/21.15107/rcub_ibiss_4449 .

TY  - JOUR
AU  - Sunjog, Karolina
AU  - Kolarević, Stoimir
AU  - Kračun-Kolarević, Margareta
AU  - Višnjić-Jeftić, Željka
AU  - Gačić, Zoran
AU  - Lenhardt, Mirjana
AU  - Vuković-Gačić, Branka
PY  - 2019
UR  - http://link.springer.com/10.1007/s11356-019-04274-3
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/3267
AB  - Due to the increasing industrialization, metals are discharged into all spheres of the environment, in particular, in river courses, which leads to the need for constant monitoring. Metals do not degrade into harmless end products; they are very persistent and have high potential for accumulation in biota. Metals in the fish body are accumulated in different amounts in the tissue specific matter. In relation to the biotic conditions and fish metabolism, the load of food, or the stage of the reproductive cycle, the seasonal variation of metal levels can be expected. Because of that, the objective of our present study was to analyze 15 metals and metalloids in liver, gills, muscle, and gonads of European chub (Squalius cephalus) throughout the 4 seasons, autumn, winter, spring, and summer. The specimens were collected from two rivers, Pestan and Beljanica at the Kolubara basin, and their concentrations were determined with inductively coupled plasma optical emission spectrometry (ICP-OES). Specimens from both rivers have shown similarities in metal accumulation like the highest accumulation of majority of elements in gills, lowest accumulation of majority of elements in muscle (except for Hg), and higher accumulation of some elements in summer (Cu, Fe, Zn). In addition, Cu and Fe showed affinity for liver, while Ba, Cr, Sr, and Zn were specific for gills. Also, Al, B, Fe, Ni, and Pb did not show significant differences in concentrations among different seasons in all investigated tissues.
T2  - Environmental Science and Pollution Research
T1  - Seasonal variation in metal concentration in various tissues of the European chub (Squalius cephalus L.).
DO  - 10.1007/s11356-019-04274-3
ER  - 

@article{
author = "Sunjog, Karolina and Kolarević, Stoimir and Kračun-Kolarević, Margareta and Višnjić-Jeftić, Željka and Gačić, Zoran and Lenhardt, Mirjana and Vuković-Gačić, Branka",
year = "2019",
abstract = "Due to the increasing industrialization, metals are discharged into all spheres of the environment, in particular, in river courses, which leads to the need for constant monitoring. Metals do not degrade into harmless end products; they are very persistent and have high potential for accumulation in biota. Metals in the fish body are accumulated in different amounts in the tissue specific matter. In relation to the biotic conditions and fish metabolism, the load of food, or the stage of the reproductive cycle, the seasonal variation of metal levels can be expected. Because of that, the objective of our present study was to analyze 15 metals and metalloids in liver, gills, muscle, and gonads of European chub (Squalius cephalus) throughout the 4 seasons, autumn, winter, spring, and summer. The specimens were collected from two rivers, Pestan and Beljanica at the Kolubara basin, and their concentrations were determined with inductively coupled plasma optical emission spectrometry (ICP-OES). Specimens from both rivers have shown similarities in metal accumulation like the highest accumulation of majority of elements in gills, lowest accumulation of majority of elements in muscle (except for Hg), and higher accumulation of some elements in summer (Cu, Fe, Zn). In addition, Cu and Fe showed affinity for liver, while Ba, Cr, Sr, and Zn were specific for gills. Also, Al, B, Fe, Ni, and Pb did not show significant differences in concentrations among different seasons in all investigated tissues.",
journal = "Environmental Science and Pollution Research",
title = "Seasonal variation in metal concentration in various tissues of the European chub (Squalius cephalus L.).",
doi = "10.1007/s11356-019-04274-3"
}

Sunjog, K., Kolarević, S., Kračun-Kolarević, M., Višnjić-Jeftić, Ž., Gačić, Z., Lenhardt, M.,& Vuković-Gačić, B.. (2019). Seasonal variation in metal concentration in various tissues of the European chub (Squalius cephalus L.).. in Environmental Science and Pollution Research.
https://doi.org/10.1007/s11356-019-04274-3

Sunjog K, Kolarević S, Kračun-Kolarević M, Višnjić-Jeftić Ž, Gačić Z, Lenhardt M, Vuković-Gačić B. Seasonal variation in metal concentration in various tissues of the European chub (Squalius cephalus L.).. in Environmental Science and Pollution Research. 2019;.
doi:10.1007/s11356-019-04274-3 .

Sunjog, Karolina, Kolarević, Stoimir, Kračun-Kolarević, Margareta, Višnjić-Jeftić, Željka, Gačić, Zoran, Lenhardt, Mirjana, Vuković-Gačić, Branka, "Seasonal variation in metal concentration in various tissues of the European chub (Squalius cephalus L.)." in Environmental Science and Pollution Research (2019),
https://doi.org/10.1007/s11356-019-04274-3 . .

TY  - CHAP
AU  - Lenhardt, Mirjana
AU  - Đikanović, Vesna
AU  - Hegediš, Aleksandar
AU  - Višnjić-Jeftić, Željka
AU  - Skorić, Stefan
AU  - Smederevac-Lalić, Marija
AU  - Petanović, Radmila
PY  - 2018
UR  - https://www.sanu.ac.rs/ekoloski-i-ekonomski-znacaj-faune-srbije/
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/3271
UR  - http://www.vbs.rs/scripts/cobiss?command=DISPLAY&base=99999&rid=265605388&fmt=11&lani=sc
AB  - Izgradnjom brana se prekida longitudinalni kontinuitet reke čime se značajno utiče na kvalitativan i kvantitativan sastav ihtiofaune u novonastalim akumulacijama, kao i na sektoru reke nizvodno od brane. Izrazito negativan efekat se ispoljava na populacijama migratornih vrsta riba, gde su posebno ugrožene anadromne vrste koje migriraju iz mora u reke radi mresta. Izgradnja brana, Đerdap I na 943 kilometru Dunava 1970. godine i Đerdap II na 863 kilometru Dunava 1984. godine, je negativno uticala na brojnost populacija vrsta riba iz porodica Acipenseridae (jesetri) i Clupeidae (haringi), koje migriraju iz Crnog mora u Dunav radi mresta. Nakon izgradnje brane Đerdap II u srpskom delu Dunava, mrest ovih vrsta je moguć samo na 17,4 kilometara toka nizvodno od brane do granice sa Bugarskom. Kao posledica pregrađivanja Dunava u komercijalnim izlovima ribara se umesto ekonomski veoma cenjenih jesetarskih vrsta, kao što su moruna (Huso huso), ruska jesetra (Acipenser gueldenstaedtii) i pastruga (Acipenser stellatus), javljaju ekonomski manje cenjene alohtone vrste riba kao što su tolstolobik beli (Hypophthalmichthys molitrix), tolstolobik sivi (Hypophthalmichthys nobilis), beli amur (Ctenopharyngodon idella) i babuška (Carassius gibelio). Iako potamodromna vrsta, koja migrira samo u okviru reka, kečiga (Acipenser ruthenus) takođe pokazuje smanjenje brojnosti populacija posle izgradnje brana, pri čemu su u ulovima zastupljene mlađe uzrasne klase u odnosu na period pre izgradnje brana. Uspor brzine toka Dunava u akumulacijama je omogućio širenje alohtonih vrsta riba. Od ranih sedamdesetih, zabeleženo je širenje predstavnika familije glavoča (Gobiidae ) duž Dunava, uglavnom zahvaljujući izgradnji brana i kanala. Danas su sve jesetarske vrste, osim kečige, označene na Crvenoj listi IUCN kao kritično ugrožene, dok su dve vrste haringi (Alosa immaculata i Alosa tanaica) zaštićene u Srbiji. U cilju zaštite biodiverziteta ihtiofaune na ovom području neophodno je započeti studije za izgradnju ribljih staza na pomenutim branama, što može voditi ka oporavku populacija jesetarskih i drugih migratornih vrsta u ovom delu Dunava, kao i obnavljanju njihovog komercijalnog izlova.
PB  - Serbian Academy of Sciences and Arts
T2  - Ekološki i ekonomski značaj faune Srbije: zbornik radova sa naučnog skupa održanog 17. novembra 2016.
T1  - Kvalitativno-kvantitativne promene ihtiofaune u protočnim dunavskim akumulacijama posle izgradnje brana đerdapskih hidrolelektrana
T1  - Qualitative and Quantitative Changes in the Ichtyofauna of the Danubian Reservoirs after the Construction of the Iron Gates Hydropower Plants Dams
SP  - 143
SP  - 143
EP  - 167
EP  - 172
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_3271
ER  - 

@inbook{
author = "Lenhardt, Mirjana and Đikanović, Vesna and Hegediš, Aleksandar and Višnjić-Jeftić, Željka and Skorić, Stefan and Smederevac-Lalić, Marija and Petanović, Radmila",
year = "2018",
abstract = "Izgradnjom brana se prekida longitudinalni kontinuitet reke čime se značajno utiče na kvalitativan i kvantitativan sastav ihtiofaune u novonastalim akumulacijama, kao i na sektoru reke nizvodno od brane. Izrazito negativan efekat se ispoljava na populacijama migratornih vrsta riba, gde su posebno ugrožene anadromne vrste koje migriraju iz mora u reke radi mresta. Izgradnja brana, Đerdap I na 943 kilometru Dunava 1970. godine i Đerdap II na 863 kilometru Dunava 1984. godine, je negativno uticala na brojnost populacija vrsta riba iz porodica Acipenseridae (jesetri) i Clupeidae (haringi), koje migriraju iz Crnog mora u Dunav radi mresta. Nakon izgradnje brane Đerdap II u srpskom delu Dunava, mrest ovih vrsta je moguć samo na 17,4 kilometara toka nizvodno od brane do granice sa Bugarskom. Kao posledica pregrađivanja Dunava u komercijalnim izlovima ribara se umesto ekonomski veoma cenjenih jesetarskih vrsta, kao što su moruna (Huso huso), ruska jesetra (Acipenser gueldenstaedtii) i pastruga (Acipenser stellatus), javljaju ekonomski manje cenjene alohtone vrste riba kao što su tolstolobik beli (Hypophthalmichthys molitrix), tolstolobik sivi (Hypophthalmichthys nobilis), beli amur (Ctenopharyngodon idella) i babuška (Carassius gibelio). Iako potamodromna vrsta, koja migrira samo u okviru reka, kečiga (Acipenser ruthenus) takođe pokazuje smanjenje brojnosti populacija posle izgradnje brana, pri čemu su u ulovima zastupljene mlađe uzrasne klase u odnosu na period pre izgradnje brana. Uspor brzine toka Dunava u akumulacijama je omogućio širenje alohtonih vrsta riba. Od ranih sedamdesetih, zabeleženo je širenje predstavnika familije glavoča (Gobiidae ) duž Dunava, uglavnom zahvaljujući izgradnji brana i kanala. Danas su sve jesetarske vrste, osim kečige, označene na Crvenoj listi IUCN kao kritično ugrožene, dok su dve vrste haringi (Alosa immaculata i Alosa tanaica) zaštićene u Srbiji. U cilju zaštite biodiverziteta ihtiofaune na ovom području neophodno je započeti studije za izgradnju ribljih staza na pomenutim branama, što može voditi ka oporavku populacija jesetarskih i drugih migratornih vrsta u ovom delu Dunava, kao i obnavljanju njihovog komercijalnog izlova.",
publisher = "Serbian Academy of Sciences and Arts",
journal = "Ekološki i ekonomski značaj faune Srbije: zbornik radova sa naučnog skupa održanog 17. novembra 2016.",
booktitle = "Kvalitativno-kvantitativne promene ihtiofaune u protočnim dunavskim akumulacijama posle izgradnje brana đerdapskih hidrolelektrana, Qualitative and Quantitative Changes in the Ichtyofauna of the Danubian Reservoirs after the Construction of the Iron Gates Hydropower Plants Dams",
pages = "143-143-167-172",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_3271"
}

Lenhardt, M., Đikanović, V., Hegediš, A., Višnjić-Jeftić, Ž., Skorić, S., Smederevac-Lalić, M.,& Petanović, R.. (2018). Kvalitativno-kvantitativne promene ihtiofaune u protočnim dunavskim akumulacijama posle izgradnje brana đerdapskih hidrolelektrana. in Ekološki i ekonomski značaj faune Srbije: zbornik radova sa naučnog skupa održanog 17. novembra 2016.
Serbian Academy of Sciences and Arts., 143-167.
https://hdl.handle.net/21.15107/rcub_ibiss_3271

Lenhardt M, Đikanović V, Hegediš A, Višnjić-Jeftić Ž, Skorić S, Smederevac-Lalić M, Petanović R. Kvalitativno-kvantitativne promene ihtiofaune u protočnim dunavskim akumulacijama posle izgradnje brana đerdapskih hidrolelektrana. in Ekološki i ekonomski značaj faune Srbije: zbornik radova sa naučnog skupa održanog 17. novembra 2016.. 2018;:143-167.
https://hdl.handle.net/21.15107/rcub_ibiss_3271 .

Lenhardt, Mirjana, Đikanović, Vesna, Hegediš, Aleksandar, Višnjić-Jeftić, Željka, Skorić, Stefan, Smederevac-Lalić, Marija, Petanović, Radmila, "Kvalitativno-kvantitativne promene ihtiofaune u protočnim dunavskim akumulacijama posle izgradnje brana đerdapskih hidrolelektrana" in Ekološki i ekonomski značaj faune Srbije: zbornik radova sa naučnog skupa održanog 17. novembra 2016. (2018):143-167,
https://hdl.handle.net/21.15107/rcub_ibiss_3271 .

TY  - JOUR
AU  - Smederevac-Lalić, Marija
AU  - Kalauzi, Aleksandar
AU  - Regner, Slobodan
AU  - Navodaru, Ion
AU  - Višnjić-Jeftić, Željka
AU  - Gačić, Zoran
AU  - Lenhardt, Mirjana
PY  - 2018
UR  - http://jifro.ir/browse.php?a_id=3486&sid=1&slc_lang=en
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/3096
AB  - The relationship between the Lower Danube River level and Romanian annual catches of Pontic shad (Alosa immaculata, Bennett 1835) were analyzed. For analysis of long term data on the Danube River water level and Pontic shad catch, combinations of different methods were applied using statistical programs, SPSS 13.0 and MATLAB 6. Periodograms, containing cyclic patterns, were obtained using Fourier analysis. Significant oscillations were determined with Fisher-Whittle’s tests and residuals were calculated after subtracting these significant oscillations from the original signals. Autoregressive moving average (ARMA) models of residuals were finally applied. Results indicated that river water levels, and especially those in May, greatly explained the fluctuations of Pontic shad catch. Annual landings varied greatly and appeared to be cyclic. Varying river flow was considered to be one of the most important factors that cause fluctuations in the size of populations. Forecast indicates gradual increase of the catch in the next decade, followed by a decrease in other decades. Estimated as a vulnerable species of fish by the IUCN, development of the forecasting model of the future catch oscillations could be very helpful to regulate fishing efforts towards the sustainable use of stocks and species conservation.
T2  - Iranian Journal of Fisheries Sciences
T1  - Analysis and forecast of Pontic shad (Alosa immaculata) catch in the Danube River
IS  - 3
VL  - 17
DO  - 10.22092/IJFS.2018.116611
SP  - 443
EP  - 457
ER  - 

@article{
author = "Smederevac-Lalić, Marija and Kalauzi, Aleksandar and Regner, Slobodan and Navodaru, Ion and Višnjić-Jeftić, Željka and Gačić, Zoran and Lenhardt, Mirjana",
year = "2018",
abstract = "The relationship between the Lower Danube River level and Romanian annual catches of Pontic shad (Alosa immaculata, Bennett 1835) were analyzed. For analysis of long term data on the Danube River water level and Pontic shad catch, combinations of different methods were applied using statistical programs, SPSS 13.0 and MATLAB 6. Periodograms, containing cyclic patterns, were obtained using Fourier analysis. Significant oscillations were determined with Fisher-Whittle’s tests and residuals were calculated after subtracting these significant oscillations from the original signals. Autoregressive moving average (ARMA) models of residuals were finally applied. Results indicated that river water levels, and especially those in May, greatly explained the fluctuations of Pontic shad catch. Annual landings varied greatly and appeared to be cyclic. Varying river flow was considered to be one of the most important factors that cause fluctuations in the size of populations. Forecast indicates gradual increase of the catch in the next decade, followed by a decrease in other decades. Estimated as a vulnerable species of fish by the IUCN, development of the forecasting model of the future catch oscillations could be very helpful to regulate fishing efforts towards the sustainable use of stocks and species conservation.",
journal = "Iranian Journal of Fisheries Sciences",
title = "Analysis and forecast of Pontic shad (Alosa immaculata) catch in the Danube River",
number = "3",
volume = "17",
doi = "10.22092/IJFS.2018.116611",
pages = "443-457"
}

Smederevac-Lalić, M., Kalauzi, A., Regner, S., Navodaru, I., Višnjić-Jeftić, Ž., Gačić, Z.,& Lenhardt, M.. (2018). Analysis and forecast of Pontic shad (Alosa immaculata) catch in the Danube River. in Iranian Journal of Fisheries Sciences, 17(3), 443-457.
https://doi.org/10.22092/IJFS.2018.116611

Smederevac-Lalić M, Kalauzi A, Regner S, Navodaru I, Višnjić-Jeftić Ž, Gačić Z, Lenhardt M. Analysis and forecast of Pontic shad (Alosa immaculata) catch in the Danube River. in Iranian Journal of Fisheries Sciences. 2018;17(3):443-457.
doi:10.22092/IJFS.2018.116611 .

Smederevac-Lalić, Marija, Kalauzi, Aleksandar, Regner, Slobodan, Navodaru, Ion, Višnjić-Jeftić, Željka, Gačić, Zoran, Lenhardt, Mirjana, "Analysis and forecast of Pontic shad (Alosa immaculata) catch in the Danube River" in Iranian Journal of Fisheries Sciences, 17, no. 3 (2018):443-457,
https://doi.org/10.22092/IJFS.2018.116611 . .