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

Všetičková, Lucie; Mikl, Libor; Adámek, Zdeněk; Prášek, V.; Roche, Kevin; Jurajda, Pavel

doi:10.1051/kmae/2017052

Cited by 8 publications

(13 citation statements)

References 42 publications

(50 reference statements)

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“…Here, co-occurrence could point to an adaptation of native predators to gobies (see also Mueller et al, 2018). This has been confirmed in several cases by recent studies, commonly with perch (Perca fluviatilis) and burbot (Lota lota) as main consumers of gobies (Madenjian et al, 2011;Mikl et al, 2017;Všetičková et al, 2018, see also references listed in Table 4). Burbot was reported as a rare species prior to the goby invasion (Schiemer & Spindler, 1989), but was common in ripraps and groynefields during the first survey (average CPUE values of 0.5 ind.…”

Section: Invasive Gobiessupporting

confidence: 69%

“…Some predators, such as burbot or wels, appear to be affected by other factors that cannot be mitigated by the high availability of invasive gobies. Nevertheless, the dietary shift of predators to invasive gobies probably also contributed to their decrease in abundance (Hempel, Neukamm, & Thiel, ; Madenjian et al, ; Všetičková et al, ). We therefore suggest that goby populations became stabilized on a lower level due to the adaptation of the native fauna in our case as well.…”

Section: Discussionmentioning

confidence: 99%

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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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Section: Invasive Gobiessupporting

confidence: 69%

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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“…Also, N. fluviatilis has been listed as one of the five potentially high‐impact nonnative species for the Great Lakes Basin (Pagnucco et al, ) and its high invasiveness potential has been attributed to some advanced life‐history traits that include an extended spawning period combined with parental care (Karakuş, Top, Tepeköy, Britton, & Tarkan, ), phenotypic plasticity (Čápová et al, ) and an opportunistic feeding strategy (Grabowska et al, ; Kakareko, Żbikowski, & Żytkowicz, ). Yet, so far there have been no reported impacts (e.g., Jakšić, Jadan, & Piria, ; Piria, Jakšić, Jakovlić, & Treer, ), even though the ecological role of both P. semilunaris and N. fluviatilis is thought to be substantial in invaded systems given their predatory behavior (e.g., Piria et al, ; Všetičková et al, ).…”

Section: Introductionmentioning

confidence: 99%

Plasticity in the feeding ecology of native Ponto‐Caspian gobies suggests establishment success in their nonnative range

Tarkan

Tepeköy

Karakuş

et al. 2019

Internat Rev Hydrobiol

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The feeding ecology of the two gobiid species monkey goby Neogobius fluviatilis and western tubenose goby Proterorhinus semilunaris was studied in four natural lakes of the Marmara Region (NW Turkey), with special emphasis on seasonal and ontogenetic shifts in diet. Both species had similar food composition consisting of zooplankton and detritus. However, diet composition of both species significantly varied amongst lakes, and particularly so for P. semilunaris with seasonal and ontogenetic differences. Diet composition and seasonal/ontogenetic differences were overall similar to other populations of these gobiid species from both their native and nonnative ranges. The present findings suggest high plasticity in the diet of these two gobies, which can opportunistically utilize available food resources.

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“…As we sampled a large variety of habitat types, the most likely explanation is a shift to deeper waters, which were inaccessible to wading electrofishing and, due to the small fish size, not effectively sampled by longlines. This shift may reflect increased competition with small round gobies, or size-dependent predation (Płąchocki et al 2012;Všetičková et al 2018). Interestingly, Borcherding et al (2011) and Didenko (2013) also found very few or no small individuals of bighead gobies in samples from the Rhine and Dnieper, respectively.…”

Section: Effects Of Restoration Measuresmentioning

confidence: 94%

Effects of hydraulic engineering restoration measures on invasive gobies in a large river (Danube, Austria)

Ramler

Keckeis

2019

Biol Invasions

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Invasive gobies can have severe detrimental effects on local fish communities, however, direct methods for population control are often insufficient (i.e. fishing) or not feasible (i.e. poisoning). Indirect methods, such as habitat modifications in the course of restoration programs, appear promising but are poorly studied. In this study, we investigate the effects of different restoration measures on the abundance and occurrence of non-native gobies in the main stem of a free-flowing section of the Danube and attempt to disentangle these measures from general large-scale trends by applying a Before-After-Control-Impact design. We found three invasive goby species (racer, bighead, and round goby) in the sampling area, partly with very high abundances. Four to six years after the installation, the measures had negative (riprap removal), neutral (side arm reconnection), or positive (groyne field adaptations) effects on goby abundances. We conclude that the impact of the measures depends on the type of intervention, is species-specific, and is largely related to substrate composition. Independent from the effect of the measures, abundances of bighead and round goby dropped in the project and reference sections after the pre-survey. This general decline probably indicates a stabilization phase of the goby populations on a lower level, but may also be influenced by a major flood event. Nevertheless, our results indicate a high potential of shoreline modifications for invasive species control, calling for considering and incorporating them in river restoration programs.

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

Cited by 8 publications

References 42 publications

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

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

Plasticity in the feeding ecology of native Ponto‐Caspian gobies suggests establishment success in their nonnative range

Effects of hydraulic engineering restoration measures on invasive gobies in a large river (Danube, Austria)

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