Offshore distribution of invasive gobies (Pisces: Gobiidae) along the longitudinal profile of the Danube River

Szalóky, Zoltán; Bammer, V.; György, Ágnes I.; Pehlivanov, Luchezar; Schabuss, Michael; Zornig, Horst; Weiperth, András; Erős, Tibor

doi:10.1127/fal/2015/0768

Cited by 16 publications

(16 citation statements)

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“…While many recent studies have described the distribution of tubenose goby (Naseka et al, 2005;Hayden and Miner, 2009;Szaloky et al, 2015), its genetic diversity (Dillon and Stepien, 2001;Stepien et al, 2005) and their parasites (Kvach and Oguz, 2009;Huyse et al, 2015;Kvach et al, 2016), little or no information is presently available on the species' relationship with native fish species and its role in the food chain (but see Mikl et al, 2017). The European perch (Perca fluviatilis) is one of the most common fish predators in European waters, and certainly along the rip-rap banks of the Musov reservoir (Adámek et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

The diet of reservoir perch before, during and after establishment of non-native tubenose goby

Všetičková

Mikl

Adámek

et al. 2018

Knowl. Manag. Aquat. Ecosyst.

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Section: Introductionmentioning

confidence: 99%

The diet of reservoir perch before, during and after establishment of non-native tubenose goby

Všetičková

Mikl

Adámek

et al. 2018

Knowl. Manag. Aquat. Ecosyst.

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“…It is also possible that a major flood event in June 2013 played a role, but due to their reproduction mode, the populations should have managed to recover since. In any case, round and bighead goby are still among the most common fishes in the sampled area and in other parts of the Danube (Szalóky et al, ).…”

Section: Discussionmentioning

confidence: 99%

Occurrence of non‐native fishes in the Danube east of Vienna (Austria) and potential interactions of invasive gobiids with native fishes

Ramler

Keckeis

2019

J Appl Ichthyol

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Summary Non‐native fish species pose a major threat to local fish populations and aquatic ecosystems in general. Invasive gobies are a particular focus of research, but with partly inconsistent results. While some studies reported severe detrimental impacts on native species, others have concluded less serious or neutral effects. We provide results from a large‐scale, multi‐annual fish monitoring program on the occurrence and abundance of non‐native fishes in the main stem of a free‐flowing section of the Austrian Danube. Special emphasis was placed on identifying positive or negative interactions of invasive gobies with native species. Whereas most non‐native species occurred too sporadically or were too few in number to infer a direct threat on the local fish community, invasive gobies were among the most common fishes throughout all sampling years. Co‐occurrence analyses revealed species‐ and mesohabitat type‐specific associations of gobies with native species, which were primarily positive. Notably, native predators such as asp, burbot, or perch probably benefit from the ubiquitous gobies. Two characteristic fluvial fishes revealed negative associations with invasive gobies, namely barbel (Barbus barbus) and Danube whitefin gudgeon (Romanogobio vladykovi): they appear to avoid habitats occupied by gobies. Accordingly, high abundances of round and bighead goby most likely resulted in population losses of barbel and whitefin gudgeon, respectively. Overall, our results indicate a limited negative impact of non‐native species in the sampling area. This is because only two out of 51 occurring species were found to be adversely affected by gobies, the share of co‐occurrences with native species was high, and other non‐native species were generally rare. Nevertheless, invasions are highly dynamic, and new non‐native species are likely to occur in the Austrian Danube, calling for continued monitoring and awareness.

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“…In contrast, P. gymnotrachelus does not appear to have invaded the North Sea and Baltic Sea watersheds. Although this species does occur in the middle and upper Danube, its abundance is considerably lower compared with N. melanostomus and P. kessleri and it has not succeeded to reach the River Rhine (Szalóky et al ., ). From this point of view, it appears that the upper Danube works as a barrier for the further spread of P. gymnotrachelus towards the North Sea.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, the lower abundance of P. gymnotrachelus and N. fluviatilis in the middle and upper Danube is likely to result from a lack of suitable substrata for these two species (Copp et al ., ; Wiesner et al ., ). Sandy bottoms or bottoms grown by macrophytes are not common in the middle and upper sections of the River Danube, where gravel predominates in the riverbed and rip‐rap habitat at the shorelines (Szalóky et al ., ). Such substrata, however, are not at odds with the habitat requirements of N. melanostomus and P. kessleri , in which no morphological feature associated with substratu specialization, was found.…”

Section: Discussionmentioning

confidence: 99%

What can morphology tell us about ecology of four invasive goby species?

Jakubčinová

Simonovic

Števove

et al. 2017

Journal of Fish Biology

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This study presents a detailed comparative analysis of external morphology of four of the most invasive goby species in Europe (round goby Neogobius melanostomus, bighead goby Ponticola kessleri, monkey goby Neogobius fluviatilis and racer goby Ponticola gymnotrachelus) and interprets some ecological requirements of these species based on their morphological attributes. The results are evaluated within an ontogenetic context, and the morphological differences between the species are discussed in terms of the question: can special external shape adaptations help to assess the invasive potential of each species? The morphometric analyses demonstrate important differences between the four invasive gobies. Neogobius melanostomus appears to have the least specialized external morphology that may favour its invasive success: little specialization to habitat or diet means reduced restraints on overall ecological requirements. The other three species were found to possess some morphological specializations (P. kessleri to large prey, N. fluviatilis to sandy habitats and P. gymnotrachelus to macrophytes), but none of these gobies have managed to colonize such large areas or to reach such overall abundances as N. melanostomus.

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Offshore distribution of invasive gobies (Pisces: Gobiidae) along the longitudinal profile of the Danube River

Cited by 16 publications

References 0 publications

The diet of reservoir perch before, during and after establishment of non-native tubenose goby

The diet of reservoir perch before, during and after establishment of non-native tubenose goby

Occurrence of non‐native fishes in the Danube east of Vienna (Austria) and potential interactions of invasive gobiids with native fishes

What can morphology tell us about ecology of four invasive goby species?

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