Diel‐feeding activity in early summer of racer goby Neogobius gymnotrachelus (Gobiidae): a new invader in the Baltic basin

By J. Grabowska, M. Grabowski. 2005

99 citations recorded by the source corpus.

Summary The first recording of the Ponto-Caspian racer goby in Poland was during 1995 in the River Bug (River Vistula system). Within 5 years, the species had spread to the downstream section of the Vistula. One of the potential impacts of invasive species on native fauna is competition for food. Therefore, the diel patterns in diet composition and gut fullness coefficient (FC) of racer goby were examined at one study site in the Wloclawski Reservoir (lower River Vistula), during May 2003. An average of 20 individuals were examined each 4 h over one 24-h period (125 fish in total). The proportion of main food items and diet width did not differ among three size-groups (43–59, 60–79 and 80–97 mm total length), and the relative biomass ratio of main food categories did not differ over the diel cycle. Amphipods constituted 11–70% of total gut content biomass and were found on average in 84% of analysed alimentary tracts. The second prey types were chironomid larvae (16–63% of total food biomass; frequency occurrence: 61–91%), and to a lesser extent chironomid pupa, ceratopogonid larvae, oligochaets, dipteran imagines and copepods, with fish larvae found in the gut of eight gobies. Gut fullness coefficient (FC) differed significantly over the 24-h period, with the highest value at night and in early morning. In conclusion, racer goby forages mainly on benthos and has a nocturnalfeeding activity. No significant diet overlap was found between racer goby and native percids, i.e. Eurasian perch Perca fluviatilis and ruffe Gymnocephalus cernuus.

Subfields: Aquatic Science, Ecology, Nature and Landscape Conservation

View Paper: https://www.semanticscholar.org/paper/2dcca3dcf8119a7794c8f6e5207d0ff9f46fe5c9

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Aquatic Science

In Ecology

In Nature and Landscape Conservation

Citations in the corpus

To be, or not to be, a non‐native freshwater fish? (2005, background): “By the 1990s, the round goby had expanded up into the River Vistula, Poland, which was also experiencing an invasion (from a downstream direction) of racer and monkey gobies (Grabowska and Grabowski, 2005; Kakareko et al., 2005) from the East via the Pripyat-Bug canal system (Fig.”
Feeding and niche differentiation in three invasive gobies in the Lower Rhine, Germany (2013, background): “…negatively interacting with the native fauna (Jude et al., 1992; Corkum et al., 2004) as competitors for habitats (Bauer et al., 2007) and food (Bergstrom and Mensinger, 2009), and as predators on eggs of other species (Chotkowski and Marsden, 1999) and small fishes (Grabowska and Grabowski, 2005).”
Alien Crustacea in Polish waters - Amphipoda (2007, background): “…an important food source for Ponto-Caspian fish invaders: racer goby (Neogobius gymnotrachelus (Kessler, 1857)) and monkey goby (Neogobius fluviatilis (Pallas, 1814)) which commonly occur in the Bug and Vistula rivers (Kostrzewa and Grabowski 2003, Grabowska and Grabowski 2005, unpublished data).”
Invasive gobies in the Danube: invasion success facilitated by availability and selection of superior food resources (2009, background): “Invasive gobies are generalist benthic feeders, capable of utilising most of the macrozoobenthic prey, a feature that increases their invasive potential (Kostrzewa & Grabowski 2003; Grabowska & Grabowski 2005; Adámek et al. 2007; Copp et al. 2008).”
How to be an invasive gammarid (Amphipoda: Gammaroidea)–comparison of life history traits (2007, background): “In such environments, they contribute significantly to energy flow by decomposing dead matter and constitute a significant or even a major part of diet of many fish species (Kelleher et al., 2000; Kostrzewa & Grabowski, 2003; Grabowska & Grabowski, 2005).”