Biological characteristics of the round goby, Neogobius melanostomus (Pallas, 1814), from different water bodies

Abstract

Abstract. The paper considers the ecological variability of the round goby, Neogobius melanostomus (Pall.), in different environments. The dietary spectrum and morphological variability of round goby populations were studied in two water bodies with different environmental conditions. The sizes and body weights of specimens were the largest in Obytichna Bay and the smallest in Kakhovka Reservoir. Differences in the morphological indices of gobies from freshwater and marine bodies of water were determined using discriminant analysis. At the study sites the round goby chiefly fed on benthic organisms that varied in species composition and energy equivalent. A significant portion of the diet comprised bivalves such as Abra ovata, Cerastoderma glaucum, and Parvicardium exiguum, which have the highest energy capacity. The average energy equivalent indices of prey items were higher in Obytichna Bay and the lowest in Kakhovka Reservoir.

Using acoustic telemetry and snorkel surveys to study diel activity and seasonal migration of round goby (Neogobius melanostomus) in an estuary of the Western Baltic Sea

“…The species continues to disperse northward along the Danish coastline (Azour et al., ; Carl, Behrens & Møller, ) (Figure ). Thriving in brackish and fresh water (Demchenko & Tkachenko, ), it has been speculated that high salinity provides a dispersal barrier for the species as it approaches the North Sea (Kornis et al., ). Yet, a study revealed that slow acclimation to increasing salinities enables high survival of adults and only marginally reduces physiological performance at salinities as high as 30 psu (Behrens, van Deurs & Christensen, ).…”

“…The species continues to disperse northward along the Danish coastline (Azour et al, 2015;Carl, Behrens & Møller, 2016) (Figure 1). Thriving in brackish and fresh water (Demchenko & Tkachenko, 2017), it has been speculated that high salinity provides a dispersal barrier for the species as it approaches the North Sea (Kornis et al, 2012).…”

“…Numerous studies have reported negative ecosystem effects in the wake of the invasion of round goby (Balshine, Verma, Chant & Theysmeyer, 2005;Demchenko & Tkachenko, 2017;Karlson, Almqvist, Skora & Appelberg, 2007;Kornis et al, 2012;Lauer, Allen & McComish, 2004;Oesterwind et al, 2017;Sapota, 2004;Schrandt et al, 2016), yet few attempts have been made to mitigate the effects (Dorenbosch et al, 2017;Ojaveer et al, 2015). One potential approach to reduce round goby numbers and the ecological footprint could be to develop a targeted fishery for the species.…”

Estimating salinity stress via hsp70 expression in the invasive round goby (Neogobius melanostomus): implications for further range expansion

“…Considering that N. melanostomus have established successful populations in low salinity parts of the Baltic Sea (salinity 2-3), several European rivers and other freshwater bodies such as the Great Lakes (e.g. Charlebois et al, 2001;Borcherding et al, 2011;Demchenko & Tkachenko, 2017) it appeared curious that freshwater treatment of this brackish water population led to higher hsp70 expression, i.e. was more stressful than was high oceanic salinity (30).…”

The effect of atmospheric pressure and water temperature on the swimming activity of round goby, Neogobius melanostomus (Actinopterygii: Perciformes: Gobiidae)

“…This fish species is also invasive in many waterways, lakes, and brackish-water systems in Europe and North America (Roche et al 2013), and has even been recorded in tidal zones (Verreycken et al 2011, Brunken et al 2012, Hempel and Thiel 2013. In the Black Sea and the Sea of Azov, round goby is the most numerous fish species among commercially important gobiids (Manilo 2014, Demchenko et al 2017.…”