The distribution and abundance of the Neogobius fishes in their native range (Bulgaria) with notes on the non-native range in the Danube River

Polačik, Matěj; Janáč, Michal; Trichkova, Teodora; Vassilev, M.; Keckeis, Hubert; Jurajda, Pavel

doi:10.1127/lr/18/2008/193

Cited by 34 publications

(57 citation statements)

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“…It is highly unlikely, however, that the species had been able to overcome the distance between Croatia and Slovakia in this time without being recorded in central Hungarian waters. Indeed, the very low numbers caught near Baja suggest the early precursors of a slow naturally advancing population (Polačik et al, 2008). First records of the species in Austrian waters occur in 1994, when specimens were recorded at rkm 1899 in a backwater near Regelsbrunn, close to the Slovak border (Spindler and Chovanec, 1995;Zweimüller et al, 1996).…”

Section: > Bighead Goby Ponticola Kessleri (Günther 1861)mentioning

confidence: 99%

“…Indeed, no verifying samples of bighead goby were caught in the Hungarian stretch until 1996/97, and those from upstream of Budapest (Erös and Guti, 1997;Molnár and Baskar, 1998), at around the same time as its discovery in Slovak waters (Kautman, 2000;Stránai, 1997). In 2005, the species was registered as common throughout both the Croatian and Slovak stretches of the Danube (Polačik et al, 2008), and low numbers were caught near Baja (rkm 1490), in the south of Hungary . It is highly unlikely, however, that the species had been able to overcome the distance between Croatia and Slovakia in this time without being recorded in central Hungarian waters.…”

Section: > Bighead Goby Ponticola Kessleri (Günther 1861)mentioning

confidence: 99%

“…In the 1950s, the species was recorded as far upstream as Vidin in Bulgaria (rkm 790; Drensky, 1951), and this was still the case by the late 1980s when Smirnov (1986) reported its presence at Vidin, downstream of the Iron Gates II dam ( Figure 4). By 1997, it had progressed only as far as Prahovo in Serbia (rkm 861) and, while it was possibly present in the reservoir, there were no further records of the goby immediately above the Iron Gate Dams Simonović et al, 1998) until 2005(Polačik et al, 2008. The next reported occurrence of round goby was from an industrial harbour at rkm 1917 in 2000, downstream of the Vienna hydropower dam on the Austrian stretch of the Danube (Wiesner et al, 2000).…”

Section: > Round Goby Neogobius Melanostomus (Pallas 1814)mentioning

confidence: 99%

See 2 more Smart Citations

A review of Gobiid expansion along the Danube-Rhine corridor – geopolitical change as a driver for invasion

Roche

Janáč

Jurajda

2013

Knowl. Managt. Aquatic Ecosyst.

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104

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Section: > Bighead Goby Ponticola Kessleri (Günther 1861)mentioning

confidence: 99%

Section: > Bighead Goby Ponticola Kessleri (Günther 1861)mentioning

confidence: 99%

Section: > Round Goby Neogobius Melanostomus (Pallas 1814)mentioning

confidence: 99%

See 1 more Smart Citation

A review of Gobiid expansion along the Danube-Rhine corridor – geopolitical change as a driver for invasion

Roche

Janáč

Jurajda

2013

Knowl. Managt. Aquatic Ecosyst.

Self Cite

104

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“…Their range expansion from a formerly static natural distribution was first observed during the 1960s (Bănărescu 1970), and quite recently this fish reached the Slovakian section of the Danube River (Polacik et al 2008). In 2008, the presence of monkey goby was confirmed on the German Rhine at the port of Duisburg (Stemmer 2008), and in 2009 in the Dutch Rhine (van Kessel et al 2009), probably having migrated downstream.…”

Section: Introductionmentioning

confidence: 89%

“…The apparent lack of comparable methods to describe population structure and reproductive characteristics calls for up-to-date standardised studies. Recently, longitudinal distribution, density and habitat preference were described by Polacik et al (2008) and Polačik et al (2008) along the lower Danube (native distribution; Bulgarian stretch); however, no other characteristics (e.g., population structure, reproduction, feeding habits) important for successful colonisation were investigated.…”

Section: Introductionmentioning

confidence: 99%

Population structure, condition, and reproduction characteristics of native monkey goby, <I>Neogobius fluviatilis</I> (Actinopterygii: Perciformes Gobiidae), in the Bulgarian Danube

Konečná¹,

Jurajda²

2012

Acta Icth et Piscat

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Konečná M., Jurajda P. 2012. Population structure, condition, and reproduction characteristics of native monkey goby, Neogobius fluviatilis (Actinopterygii: Perciformes Gobiidae), in the Bulgarian Danube. Acta Ichthyol. Piscat. 42 (4): 321-327.Background. Monkey goby is one of many Neogobius species that have invaded European waters in recent decades. Little interest has been paid to this species up till now, probably due to its lower rate of invasiveness compared to some other goby species, e.g., round goby. As with any non-native species, however, it represents a potential danger for native fauna. The aim of this study is to fill in the missing data concerning monkey goby biology and population structure in its native area of distribution, thereby providing a baseline for future comparative studies in non-native distribution areas. Materials and methods. Samples of monkey gobies, Neogobius fluviatilis (Pallas, 1814), were obtained seasonally from the lower, Bulgarian stretch of the Danube River during 2006. The fish collected were sexed, measured, and weighed. After that the gonads were removed and weighed. These data were used to calculate sex ratio, length-frequency distribution, condition coefficient, and gonadosomatic index. Dissected ovaries were used for histological analysis of oocyte distribution.Results. The monkey goby population displayed a relatively balanced sex ratio, while length-frequency distribution demonstrated two-(April), and later three (October), clearly visible peaks, representing three age classes. The condition factor of both males and females was influenced by season. We were able to estimate the starting time and the duration of the spawning season using both gonadosomatic index and ovarian histological analysis. Conclusion. Population of monkey goby in the Bulgarian Danube is an example of a stable native population defined by balanced sex ratio, three-year life span, and recruitment represented by strong cohort of 0+ fish, some of them maturing in their second year of life.

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Does intraspecific competition cause oxidative stress? Influence of biotic and abiotic factors on antioxidant system of an invasive round goby

Błońska,

Tarkan,

Janic

et al. 2023

Ecology and Evolution

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Changes in oxidative status represent organismal response to stressful external stimuli. While there is substantial knowledge on the influence of abiotic factors on the antioxidant system of different organisms, the impact of biotic factors remains largely unexplored. The aim of the present study was to evaluate the effect of acute competitive interactions on oxidative stress. Territory‐resident and intruder round goby Neogobius melanostomus individuals were experimentally subjected to competition for limited shelter resource in three treatments (lasting 1, 6 and 12 h), and oxidative stress parameters (total antioxidant capacity, catalase activity, reduced glutathione, lipid peroxidation), as well as behaviour (time spent in the shelter, guarding the shelter and aggression) were measured. All tested biochemical parameters reached higher values in the liver than in the muscle tissue. Fish behaviour and antioxidant defence did not show any potential relationships reflecting changes in antioxidant status and aggression. Particularly, there was no difference between resident and intruder fish in oxidative stress parameters. We compared our results to the outcome of our previous studies (similar experimental protocol and species) but with acute heat shock as a stressor instead of competition. The higher temperature was found to be a stronger stressor than the competition, most pronounced in total antioxidant capacity and oxidative damage.

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The distribution and abundance of the Neogobius fishes in their native range (Bulgaria) with notes on the non-native range in the Danube River

Cited by 34 publications

References 0 publications

A review of Gobiid expansion along the Danube-Rhine corridor – geopolitical change as a driver for invasion

A review of Gobiid expansion along the Danube-Rhine corridor – geopolitical change as a driver for invasion

Population structure, condition, and reproduction characteristics of native monkey goby, <I>Neogobius fluviatilis</I> (Actinopterygii: Perciformes Gobiidae), in the Bulgarian Danube

Does intraspecific competition cause oxidative stress? Influence of biotic and abiotic factors on antioxidant system of an invasive round goby

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