TY  - JOUR
AU  - Meulenbroek, Paul
AU  - Hein, Thomas
AU  - Friedrich, Thomas
AU  - Valentini, Alice
AU  - Erős, Tibor
AU  - Schabuss, Michael
AU  - Zornig, Horst
AU  - Lenhardt, Mirjana
AU  - Pekarik, Ladislav
AU  - Jean, Pauline
AU  - Dejean, Toni
AU  - Pont, Didier
PY  - 2022
UR  - https://link.springer.com/10.1007/s10531-022-02491-w
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5346
PB  - Dordrecht: Springer
T2  - Biodiversity and Conservation
T1  - Correction to: Sturgeons in large rivers: detecting the near-extinct needles in a haystack via eDNA metabarcoding from water samples
DO  - 10.1007/s10531-022-02491-w
ER  - 

@article{
author = "Meulenbroek, Paul and Hein, Thomas and Friedrich, Thomas and Valentini, Alice and Erős, Tibor and Schabuss, Michael and Zornig, Horst and Lenhardt, Mirjana and Pekarik, Ladislav and Jean, Pauline and Dejean, Toni and Pont, Didier",
year = "2022",
publisher = "Dordrecht: Springer",
journal = "Biodiversity and Conservation",
title = "Correction to: Sturgeons in large rivers: detecting the near-extinct needles in a haystack via eDNA metabarcoding from water samples",
doi = "10.1007/s10531-022-02491-w"
}

Meulenbroek, P., Hein, T., Friedrich, T., Valentini, A., Erős, T., Schabuss, M., Zornig, H., Lenhardt, M., Pekarik, L., Jean, P., Dejean, T.,& Pont, D.. (2022). Correction to: Sturgeons in large rivers: detecting the near-extinct needles in a haystack via eDNA metabarcoding from water samples. in Biodiversity and Conservation
Dordrecht: Springer..
https://doi.org/10.1007/s10531-022-02491-w

Meulenbroek P, Hein T, Friedrich T, Valentini A, Erős T, Schabuss M, Zornig H, Lenhardt M, Pekarik L, Jean P, Dejean T, Pont D. Correction to: Sturgeons in large rivers: detecting the near-extinct needles in a haystack via eDNA metabarcoding from water samples. in Biodiversity and Conservation. 2022;.
doi:10.1007/s10531-022-02491-w .

Meulenbroek, Paul, Hein, Thomas, Friedrich, Thomas, Valentini, Alice, Erős, Tibor, Schabuss, Michael, Zornig, Horst, Lenhardt, Mirjana, Pekarik, Ladislav, Jean, Pauline, Dejean, Toni, Pont, Didier, "Correction to: Sturgeons in large rivers: detecting the near-extinct needles in a haystack via eDNA metabarcoding from water samples" in Biodiversity and Conservation (2022),
https://doi.org/10.1007/s10531-022-02491-w . .

TY  - JOUR
AU  - Pont, Didier
AU  - Meulenbroek, Paul
AU  - Bammer, Vincenz
AU  - Dejean, Tony
AU  - Erős, Tibor
AU  - Jean, Pauline
AU  - Lenhardt, Mirjana
AU  - Nagel, Christoffer
AU  - Pekarik, Ladislav
AU  - Schabuss, Michael
AU  - Stoeckle, Bernhard C
AU  - Stoica, Elena
AU  - Zornig, Horst
AU  - Weigand, Alexander
AU  - Valentini, Alice
PY  - 2022
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5163
AB  - Environmental DNA (eDNA) metabarcoding is an effective method for studying fish communities but allows only an estimation of relative species abundance (density/biomass). Here, we combine metabarcoding with an estimation of the total abundance of eDNA amplified by our universal marker (teleo) using a quantitative (q)PCR approach to infer the absolute abundance of fish species. We carried out a 2850-km eDNA survey within the Danube catchment using a spatial integrative sampling protocol coupled with traditional electrofishing for fish biomass and density estimation. Total fish eDNA concentrations and total fish abundance were highly correlated. The correlation between eDNA concentrations per taxon and absolute specific abundance was of comparable strength when all sites were pooled and remained significant when the sites were considered separately. Furthermore, a nonlinear mixed model showed that species richness was underestimated when the amount of teleo-DNA extracted from a sample was below a threshold of 0.65 × 106 copies of eDNA. This result, combined with the decrease in teleo-DNA concentration by several orders of magnitude with river size, highlights the need to increase sampling effort in large rivers. Our results provide a comprehensive description of longitudinal changes in fish communities and underline our combined metabarcoding/qPCR approach for biomonitoring and bioassessment surveys when a rough estimate of absolute species abundance is sufficient.
PB  - Hoboken: Wiley
T2  - Molecular Ecology Resources
T1  - Quantitative monitoring of diverse fish communities on a large scale combining eDNA metabarcoding and qPCR.
DO  - 10.1111/1755-0998.13715
ER  - 

@article{
author = "Pont, Didier and Meulenbroek, Paul and Bammer, Vincenz and Dejean, Tony and Erős, Tibor and Jean, Pauline and Lenhardt, Mirjana and Nagel, Christoffer and Pekarik, Ladislav and Schabuss, Michael and Stoeckle, Bernhard C and Stoica, Elena and Zornig, Horst and Weigand, Alexander and Valentini, Alice",
year = "2022",
abstract = "Environmental DNA (eDNA) metabarcoding is an effective method for studying fish communities but allows only an estimation of relative species abundance (density/biomass). Here, we combine metabarcoding with an estimation of the total abundance of eDNA amplified by our universal marker (teleo) using a quantitative (q)PCR approach to infer the absolute abundance of fish species. We carried out a 2850-km eDNA survey within the Danube catchment using a spatial integrative sampling protocol coupled with traditional electrofishing for fish biomass and density estimation. Total fish eDNA concentrations and total fish abundance were highly correlated. The correlation between eDNA concentrations per taxon and absolute specific abundance was of comparable strength when all sites were pooled and remained significant when the sites were considered separately. Furthermore, a nonlinear mixed model showed that species richness was underestimated when the amount of teleo-DNA extracted from a sample was below a threshold of 0.65 × 106 copies of eDNA. This result, combined with the decrease in teleo-DNA concentration by several orders of magnitude with river size, highlights the need to increase sampling effort in large rivers. Our results provide a comprehensive description of longitudinal changes in fish communities and underline our combined metabarcoding/qPCR approach for biomonitoring and bioassessment surveys when a rough estimate of absolute species abundance is sufficient.",
publisher = "Hoboken: Wiley",
journal = "Molecular Ecology Resources",
title = "Quantitative monitoring of diverse fish communities on a large scale combining eDNA metabarcoding and qPCR.",
doi = "10.1111/1755-0998.13715"
}

Pont, D., Meulenbroek, P., Bammer, V., Dejean, T., Erős, T., Jean, P., Lenhardt, M., Nagel, C., Pekarik, L., Schabuss, M., Stoeckle, B. C., Stoica, E., Zornig, H., Weigand, A.,& Valentini, A.. (2022). Quantitative monitoring of diverse fish communities on a large scale combining eDNA metabarcoding and qPCR.. in Molecular Ecology Resources
Hoboken: Wiley..
https://doi.org/10.1111/1755-0998.13715

Pont D, Meulenbroek P, Bammer V, Dejean T, Erős T, Jean P, Lenhardt M, Nagel C, Pekarik L, Schabuss M, Stoeckle BC, Stoica E, Zornig H, Weigand A, Valentini A. Quantitative monitoring of diverse fish communities on a large scale combining eDNA metabarcoding and qPCR.. in Molecular Ecology Resources. 2022;.
doi:10.1111/1755-0998.13715 .

Pont, Didier, Meulenbroek, Paul, Bammer, Vincenz, Dejean, Tony, Erős, Tibor, Jean, Pauline, Lenhardt, Mirjana, Nagel, Christoffer, Pekarik, Ladislav, Schabuss, Michael, Stoeckle, Bernhard C, Stoica, Elena, Zornig, Horst, Weigand, Alexander, Valentini, Alice, "Quantitative monitoring of diverse fish communities on a large scale combining eDNA metabarcoding and qPCR." in Molecular Ecology Resources (2022),
https://doi.org/10.1111/1755-0998.13715 . .

TY  - JOUR
AU  - Meulenbroek, Paul
AU  - Hein, Thomas
AU  - Friedrich, Thomas
AU  - Valentini, Alice
AU  - Erős, Tibor
AU  - Schabuss, Michael
AU  - Zornig, Horst
AU  - Lenhardt, Mirjana
AU  - Pekarik, Ladislav
AU  - Jean, Pauline
AU  - Dejean, Tony
AU  - Pont, Didier
PY  - 2022
UR  - https://link.springer.com/10.1007/s10531-022-02459-w
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5083
AB  - Sturgeon populations are declining worldwide and are the target of extensive conservation efforts. Addressed in several pieces of legislation, sturgeons have received considerable attention as flagship or umbrella species. Despite the need for a better understanding of the distribution and population status, the use of traditional sampling methods failed in the past, thereby hampering reliable assessments, a prerequisite for conservation. Here, we describe the development and application of an environmental DNA (eDNA) metabarcoding approach for detecting rare sturgeons in large rivers. Exemplarily, we developed a reference database for five native Danube sturgeons ( Acipenser stellatus , Acipenser gueldenstaedtii , Acipenser ruthenus, Acipenser nudiventris, and Huso huso ) and two non-native species ( Acipenser baerii and Acipenser transmontanus ), assessed these ex situ, and used eDNA as a detection tool along the entire length of the Danube (Europe, ~ 2850 km) and major tributaries. In ex situ analyses, all assays yielded positive amplifications for the assessed sturgeon species. In the Danube, the presence of A. ruthenus was confirmed at 14 of 29 sites (48.3%), and in 2 of 18 tributary sites (11.1%), providing the first comprehensive large-scale biogeographical snapshot of this species. Relative number of reads assigned to A. ruthenus varied between 0 and 2.5%, with sites registering positive detections being clustered in 3 sections of the Danube. Our findings enabled us to confirm the advantages of eDNA monitoring over traditional sampling methods for comprehensive whole-river snapshot studies of sturgeons conducted on a large geographical scale, and therefore we consider it to be a promising approach for application in conservation measures, fisheries management, scientific studies, and adaptive management plans for sturgeons on a global scale.
PB  - Dordrecht: Springer
T2  - Biodiversity and Conservation
T1  - Sturgeons in large rivers: detecting the near-extinct needles in a haystack via eDNA metabarcoding from water samples
IS  - 11
VL  - 31
DO  - 10.1007/s10531-022-02459-w
SP  - 2817
EP  - 2832
ER  - 

@article{
author = "Meulenbroek, Paul and Hein, Thomas and Friedrich, Thomas and Valentini, Alice and Erős, Tibor and Schabuss, Michael and Zornig, Horst and Lenhardt, Mirjana and Pekarik, Ladislav and Jean, Pauline and Dejean, Tony and Pont, Didier",
year = "2022",
abstract = "Sturgeon populations are declining worldwide and are the target of extensive conservation efforts. Addressed in several pieces of legislation, sturgeons have received considerable attention as flagship or umbrella species. Despite the need for a better understanding of the distribution and population status, the use of traditional sampling methods failed in the past, thereby hampering reliable assessments, a prerequisite for conservation. Here, we describe the development and application of an environmental DNA (eDNA) metabarcoding approach for detecting rare sturgeons in large rivers. Exemplarily, we developed a reference database for five native Danube sturgeons ( Acipenser stellatus , Acipenser gueldenstaedtii , Acipenser ruthenus, Acipenser nudiventris, and Huso huso ) and two non-native species ( Acipenser baerii and Acipenser transmontanus ), assessed these ex situ, and used eDNA as a detection tool along the entire length of the Danube (Europe, ~ 2850 km) and major tributaries. In ex situ analyses, all assays yielded positive amplifications for the assessed sturgeon species. In the Danube, the presence of A. ruthenus was confirmed at 14 of 29 sites (48.3%), and in 2 of 18 tributary sites (11.1%), providing the first comprehensive large-scale biogeographical snapshot of this species. Relative number of reads assigned to A. ruthenus varied between 0 and 2.5%, with sites registering positive detections being clustered in 3 sections of the Danube. Our findings enabled us to confirm the advantages of eDNA monitoring over traditional sampling methods for comprehensive whole-river snapshot studies of sturgeons conducted on a large geographical scale, and therefore we consider it to be a promising approach for application in conservation measures, fisheries management, scientific studies, and adaptive management plans for sturgeons on a global scale.",
publisher = "Dordrecht: Springer",
journal = "Biodiversity and Conservation",
title = "Sturgeons in large rivers: detecting the near-extinct needles in a haystack via eDNA metabarcoding from water samples",
number = "11",
volume = "31",
doi = "10.1007/s10531-022-02459-w",
pages = "2817-2832"
}

Meulenbroek, P., Hein, T., Friedrich, T., Valentini, A., Erős, T., Schabuss, M., Zornig, H., Lenhardt, M., Pekarik, L., Jean, P., Dejean, T.,& Pont, D.. (2022). Sturgeons in large rivers: detecting the near-extinct needles in a haystack via eDNA metabarcoding from water samples. in Biodiversity and Conservation
Dordrecht: Springer., 31(11), 2817-2832.
https://doi.org/10.1007/s10531-022-02459-w

Meulenbroek P, Hein T, Friedrich T, Valentini A, Erős T, Schabuss M, Zornig H, Lenhardt M, Pekarik L, Jean P, Dejean T, Pont D. Sturgeons in large rivers: detecting the near-extinct needles in a haystack via eDNA metabarcoding from water samples. in Biodiversity and Conservation. 2022;31(11):2817-2832.
doi:10.1007/s10531-022-02459-w .

Meulenbroek, Paul, Hein, Thomas, Friedrich, Thomas, Valentini, Alice, Erős, Tibor, Schabuss, Michael, Zornig, Horst, Lenhardt, Mirjana, Pekarik, Ladislav, Jean, Pauline, Dejean, Tony, Pont, Didier, "Sturgeons in large rivers: detecting the near-extinct needles in a haystack via eDNA metabarcoding from water samples" in Biodiversity and Conservation, 31, no. 11 (2022):2817-2832,
https://doi.org/10.1007/s10531-022-02459-w . .

TY  - CONF
AU  - Lenhardt, Mirjana
AU  - Pekarik, Ladislav
AU  - Skorić, Stefan
AU  - Smederevac Lalić, Marija
AU  - Hegediš, Aleksandar
AU  - Jaćimović, Milica
AU  - Đikanović, Vesna
PY  - 2017
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/4797
AB  - Some recent data show that five gobiid species have spread outside their native range and
expanded their distribution area in Serbia along the rivers Danube, Tisza, Sava, and Velika
Morava. These are: monkey goby Neogobius fluviatilis, racer goby Neogobius
gymnotrachelus, bighead goby Neogobius kessleri, round goby Neogobius melanostomus,
and tubenose goby Proterorhinus semilunaris.
The aim of this study was to compare the efficiency of two different methods for
fish sampling, as well as to assess influence of the diel period on catch of gobiids in the
Serbian stretch of the Danube River. During October 2012 and September 2013, the
sampling was performed by electrofishing and beach seining in four riverside locations of
the Danube River, as follows: at Novi Sad (river km 1257), Belgrade (river km 1173), Tekija
(river km 956), and Prahovo (river km 862), with the water depth being of up to 120 cm. At
each location, the sampling was performed at 17:30, 18:30, 19:30 and 20:30.
A total of 551 gobies were caught. The highest number of specimens (238) was
registered at Tekija, followed by the sites at Belgrade (192) and Prahovo (109), and only 12
specimens caught at Novi Sad. The catch of the round goby and monkey goby was more
efficient by beach seining than by electrofishing, while the catch of the tubenose goby was
more efficient by electrofishing. Both methods had similar efficiency in terms of the catch
of the bighead goby and racer goby. The species diversity and the number of caught
specimens were the highest at 18:30. All five species were recorded at the sites of Belgrade,
Tekija and Prahovo, while only the monkey goby and racer goby were caught at Novi Sad.
The methods used in this study showed good efficiency in catch of gobiids, especially at
dusk. Despite the difficulty in using these methods in certain habitats, we assume that they
could be highly relevant in the regular monitoring of gobiids along the inshore parts of the
rivers.
PB  - Sofia: Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences (IBER-BAS)
PB  - Sofia: East and South European Network for Invasive Alien Species (ESENIAS)
C3  - 7th ESENIAS Workshop with Scientific Conference. Networking and Regional Cooperation Towards Invasive Alien Species Prevention and Management in Europe. Book of abstracts, 8. - 30. Mar 2017, Sofia, Bulgaria.
T1  - Influence of the diel period and different sampling methods on catch of gobiids at four locations in the inshore part of the Danube River.
SP  - 157
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_4797
ER  - 

@conference{
author = "Lenhardt, Mirjana and Pekarik, Ladislav and Skorić, Stefan and Smederevac Lalić, Marija and Hegediš, Aleksandar and Jaćimović, Milica and Đikanović, Vesna",
year = "2017",
abstract = "Some recent data show that five gobiid species have spread outside their native range and
expanded their distribution area in Serbia along the rivers Danube, Tisza, Sava, and Velika
Morava. These are: monkey goby Neogobius fluviatilis, racer goby Neogobius
gymnotrachelus, bighead goby Neogobius kessleri, round goby Neogobius melanostomus,
and tubenose goby Proterorhinus semilunaris.
The aim of this study was to compare the efficiency of two different methods for
fish sampling, as well as to assess influence of the diel period on catch of gobiids in the
Serbian stretch of the Danube River. During October 2012 and September 2013, the
sampling was performed by electrofishing and beach seining in four riverside locations of
the Danube River, as follows: at Novi Sad (river km 1257), Belgrade (river km 1173), Tekija
(river km 956), and Prahovo (river km 862), with the water depth being of up to 120 cm. At
each location, the sampling was performed at 17:30, 18:30, 19:30 and 20:30.
A total of 551 gobies were caught. The highest number of specimens (238) was
registered at Tekija, followed by the sites at Belgrade (192) and Prahovo (109), and only 12
specimens caught at Novi Sad. The catch of the round goby and monkey goby was more
efficient by beach seining than by electrofishing, while the catch of the tubenose goby was
more efficient by electrofishing. Both methods had similar efficiency in terms of the catch
of the bighead goby and racer goby. The species diversity and the number of caught
specimens were the highest at 18:30. All five species were recorded at the sites of Belgrade,
Tekija and Prahovo, while only the monkey goby and racer goby were caught at Novi Sad.
The methods used in this study showed good efficiency in catch of gobiids, especially at
dusk. Despite the difficulty in using these methods in certain habitats, we assume that they
could be highly relevant in the regular monitoring of gobiids along the inshore parts of the
rivers.",
publisher = "Sofia: Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences (IBER-BAS), Sofia: East and South European Network for Invasive Alien Species (ESENIAS)",
journal = "7th ESENIAS Workshop with Scientific Conference. Networking and Regional Cooperation Towards Invasive Alien Species Prevention and Management in Europe. Book of abstracts, 8. - 30. Mar 2017, Sofia, Bulgaria.",
title = "Influence of the diel period and different sampling methods on catch of gobiids at four locations in the inshore part of the Danube River.",
pages = "157",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_4797"
}

Lenhardt, M., Pekarik, L., Skorić, S., Smederevac Lalić, M., Hegediš, A., Jaćimović, M.,& Đikanović, V.. (2017). Influence of the diel period and different sampling methods on catch of gobiids at four locations in the inshore part of the Danube River.. in 7th ESENIAS Workshop with Scientific Conference. Networking and Regional Cooperation Towards Invasive Alien Species Prevention and Management in Europe. Book of abstracts, 8. - 30. Mar 2017, Sofia, Bulgaria.
Sofia: Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences (IBER-BAS)., 157.
https://hdl.handle.net/21.15107/rcub_ibiss_4797

Lenhardt M, Pekarik L, Skorić S, Smederevac Lalić M, Hegediš A, Jaćimović M, Đikanović V. Influence of the diel period and different sampling methods on catch of gobiids at four locations in the inshore part of the Danube River.. in 7th ESENIAS Workshop with Scientific Conference. Networking and Regional Cooperation Towards Invasive Alien Species Prevention and Management in Europe. Book of abstracts, 8. - 30. Mar 2017, Sofia, Bulgaria.. 2017;:157.
https://hdl.handle.net/21.15107/rcub_ibiss_4797 .

Lenhardt, Mirjana, Pekarik, Ladislav, Skorić, Stefan, Smederevac Lalić, Marija, Hegediš, Aleksandar, Jaćimović, Milica, Đikanović, Vesna, "Influence of the diel period and different sampling methods on catch of gobiids at four locations in the inshore part of the Danube River." in 7th ESENIAS Workshop with Scientific Conference. Networking and Regional Cooperation Towards Invasive Alien Species Prevention and Management in Europe. Book of abstracts, 8. - 30. Mar 2017, Sofia, Bulgaria. (2017):157,
https://hdl.handle.net/21.15107/rcub_ibiss_4797 .

TY  - JOUR
AU  - Lenhardt, Mirjana
AU  - Pekarik, Ladislav
AU  - Skorić, Stefan B.
AU  - Smederevac-Lalić, Marija M.
AU  - Hegediš, Aleksandar E.
AU  - Jaćimović, Milica L.
AU  - Đikanović, Vesna
PY  - 2017
UR  - http://www.acta-zoologica-bulgarica.eu/downloads/acta-zoologica-bulgarica/2017/supplement-9-225-229.pdf
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/2938
AB  - The aim of this work was to compare the efficiency of two different methods for fish sampling and to assess the influence of the twilight period on the catch of gobiids along the Danube River in Serbia. The samplings were performed by electrofishing and beach seining in inshore parts of the Danube River with water depth up to 120 cm at four locations: Novi Sad, Belgrade, Tekija, and Prahovo, in October 2012 and September 2013. At each location, the samplings were performed at 17:30, 18:30, 19:30 and 20:30. Totally, 539 gobiids were caught. The highest number of specimens (218) was registered at Tekija, while lower numbers were registered at Belgrade (192) and Prahovo (117), and only 12 specimens were caught at Novi Sad. The catch of the round goby Neogobius melanostomus and monkey goby Neogobius fluviatilis was more efficient by beach seining than by electrofishing, whereas the catch of the tubenose goby Proterorhinus semilunaris was more efficient by electrofishing. Both methods had similar efficiency in catching the bighead goby Ponticola kessleri and racer goby Babka gymnotrachelus. The species diversity and number of the caught specimens were the highest at 18:30. All five species were recorded at Belgrade, Tekija and Prahovo, while only the monkey goby and racer goby were caught at Novi Sad. The methods used in this study showed good efficiency in catching gobiids, especially at dusk. Even though these methods are difficult to apply in certain habitats, they could be highly relevant in the regular monitoring of gobiids along the inshore parts of rivers.
T2  - Acta Zoologica Bulgarica
T2  - Acta Zoologica Bulgarica
T1  - Influence of the twilight period and different sampling methods on catch of Gobiids (Gobiidae) at four locations in the inshore parts of the Danube River
IS  - Supplement 9
VL  - 69
SP  - 225
EP  - 229
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_2938
ER  - 

@article{
author = "Lenhardt, Mirjana and Pekarik, Ladislav and Skorić, Stefan B. and Smederevac-Lalić, Marija M. and Hegediš, Aleksandar E. and Jaćimović, Milica L. and Đikanović, Vesna",
year = "2017",
abstract = "The aim of this work was to compare the efficiency of two different methods for fish sampling and to assess the influence of the twilight period on the catch of gobiids along the Danube River in Serbia. The samplings were performed by electrofishing and beach seining in inshore parts of the Danube River with water depth up to 120 cm at four locations: Novi Sad, Belgrade, Tekija, and Prahovo, in October 2012 and September 2013. At each location, the samplings were performed at 17:30, 18:30, 19:30 and 20:30. Totally, 539 gobiids were caught. The highest number of specimens (218) was registered at Tekija, while lower numbers were registered at Belgrade (192) and Prahovo (117), and only 12 specimens were caught at Novi Sad. The catch of the round goby Neogobius melanostomus and monkey goby Neogobius fluviatilis was more efficient by beach seining than by electrofishing, whereas the catch of the tubenose goby Proterorhinus semilunaris was more efficient by electrofishing. Both methods had similar efficiency in catching the bighead goby Ponticola kessleri and racer goby Babka gymnotrachelus. The species diversity and number of the caught specimens were the highest at 18:30. All five species were recorded at Belgrade, Tekija and Prahovo, while only the monkey goby and racer goby were caught at Novi Sad. The methods used in this study showed good efficiency in catching gobiids, especially at dusk. Even though these methods are difficult to apply in certain habitats, they could be highly relevant in the regular monitoring of gobiids along the inshore parts of rivers.",
journal = "Acta Zoologica Bulgarica, Acta Zoologica Bulgarica",
title = "Influence of the twilight period and different sampling methods on catch of Gobiids (Gobiidae) at four locations in the inshore parts of the Danube River",
number = "Supplement 9",
volume = "69",
pages = "225-229",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_2938"
}

Lenhardt, M., Pekarik, L., Skorić, S. B., Smederevac-Lalić, M. M., Hegediš, A. E., Jaćimović, M. L.,& Đikanović, V.. (2017). Influence of the twilight period and different sampling methods on catch of Gobiids (Gobiidae) at four locations in the inshore parts of the Danube River. in Acta Zoologica Bulgarica, 69(Supplement 9), 225-229.
https://hdl.handle.net/21.15107/rcub_ibiss_2938

Lenhardt M, Pekarik L, Skorić SB, Smederevac-Lalić MM, Hegediš AE, Jaćimović ML, Đikanović V. Influence of the twilight period and different sampling methods on catch of Gobiids (Gobiidae) at four locations in the inshore parts of the Danube River. in Acta Zoologica Bulgarica. 2017;69(Supplement 9):225-229.
https://hdl.handle.net/21.15107/rcub_ibiss_2938 .

Lenhardt, Mirjana, Pekarik, Ladislav, Skorić, Stefan B., Smederevac-Lalić, Marija M., Hegediš, Aleksandar E., Jaćimović, Milica L., Đikanović, Vesna, "Influence of the twilight period and different sampling methods on catch of Gobiids (Gobiidae) at four locations in the inshore parts of the Danube River" in Acta Zoologica Bulgarica, 69, no. Supplement 9 (2017):225-229,
https://hdl.handle.net/21.15107/rcub_ibiss_2938 .