scholarly journals Reproductive biology of pioneer round gobies (Neogobius melanostomus Pallas, 1814) at the edge of their invasion front in three small rivers (Lower Danube Basin, Bulgaria)

2021 ◽  
Vol 70 (4) ◽  
Author(s):  
Dimitriy D. Dashinov ◽  
Eliza P. Uzunova
Keyword(s):  
Reproductive Biology ◽  
Neogobius Melanostomus ◽  
Small Rivers ◽  
Danube Basin ◽  
Invasion Front ◽  
Round Gobies

scholarly journals First Occurrence of the Round Goby, Neogobius melanostomus, in the St. Lawrence River at Cornwall, Ontario

2005 ◽  
Vol 119 (4) ◽  
pp. 582 ◽  
Author(s):  
M. Brian C. Hickey ◽  
Adrienne R. Fowlie
Keyword(s):  
Round Goby ◽  
Scuba Diving ◽  
Neogobius Melanostomus ◽  
Benthic Fish ◽  
First Occurrence ◽  
Round Gobies ◽  
St Lawrence River

We document the first reported occurrence of the Round Goby, Neogobius melanostomus, a small benthic fish native to the Black and Caspian seas, in the St. Lawrence River near Cornwall. On 7 September 2004, we observed approximately 20 Round Gobies while SCUBA diving at a depth of 7 m, downstream of the Saunders Generating Station at Cornwall, Ontario. Round Gobies appear to have arrived recently in this reach of the river and have not previously been detected despite extensive fish surveys conducted in the area.

Parasites of round goby, Neogobius melanostomus, currently invading the Elbe River

2019 ◽  
Vol 48 (1) ◽  
pp. 56-65 ◽  
Author(s):  
Yuriy Kvach ◽  
Markéta Ondračková ◽  
Michal Janáč ◽  
Vadym Krasnovyd ◽  
Mária Seifertová ◽  
...  
Keyword(s):  
Round Goby ◽  
Parasite Community ◽  
Neogobius Melanostomus ◽  
Published Data ◽  
Tidal Zone ◽  
New Host ◽  
The North ◽  
Round Gobies ◽  
The Elbe River ◽  
The One

Abstract The round goby, Neogobius melanostomus, is a Ponto-Caspian fish species currently found in many parts of Europe, including the North Sea riverine deltas. The objective of this study was to examine the parasite community of fish caught in the lower Elbe (Süderelbe – tidal zone; Geesthacht – non-tidal) in Germany and compare it with published data from the upper Elbe (Ústí nad Labem) in the Czech Republic. Twelve parasite taxa were recorded in the lower Elbe, six in the Süderelbe and nine near the city of Geesthacht. Süderelbe fish were mainly infected with Angullicola crassus larvae, while gobies from Geesthacht – with glochidia and sporadically occurring Pomporhynchus laevis, and the opposite situation was observed at Ústí nad Labem. It appears that a large tidal weir at Geesthacht significantly contributes to the division of the round goby population, with the Geesthacht parasite community being more similar to that at Ústí nad Labem than the one from the Süderelbe, thus increasing the likelihood that shipping from Hamburg was the introduction vector to Ústí nad Labem. We also recorded Acanthocephalus rhinensis in the Elbe for the first time, and in a new host – the round goby. Thus, round gobies may represent a new vector for the introduction of this parasite along the Elbe.

Trophic mercury biomagnification patterns in two European rivers following introduction of invasive round gobies (Neogobius melanostomus)

Limnologica ◽  
2020 ◽  
Vol 84 ◽  
pp. 125817
Author(s):  
Pavel Jurajda ◽  
Lucie Všetičková ◽  
Helena Švecová ◽  
Jitka Kolářová ◽  
Zdenka Jurajdová ◽  
...  
Keyword(s):  
Neogobius Melanostomus ◽  
Round Gobies

The Effect of Elevated Steroids Released by Reproductive Male Round Gobies, Neogobius melanostomus, on Olfactory Responses in Females

2011 ◽  
Vol 37 (3) ◽  
pp. 260-262 ◽  
Author(s):  
Alyson J. Laframboise ◽  
Yogesh Katare ◽  
Alexander P. Scott ◽  
Barbara S. Zielinski
Keyword(s):  
Neogobius Melanostomus ◽  
Olfactory Responses ◽  
Reproductive Male ◽  
Round Gobies

Reproductive female round gobies (Neogobius melanostomus) are attracted to visual male models at a nest rather than to olfactory stimuli in urine of reproductive males

Behaviour ◽  
2010 ◽  
Vol 147 (1) ◽  
pp. 121-132 ◽  
Author(s):  
Stan Yavno ◽  
Lynda Corkum
Keyword(s):  
Round Goby ◽  
Neogobius Melanostomus ◽  
Visual Signals ◽  
Invasive Fish ◽  
Reproductive Female ◽  
Olfactory Stimuli ◽  
Reproductive Male ◽  
Round Gobies ◽  
Male Model ◽  
Reproductive Females

AbstractFish are known to communicate in many ways and commonly use olfactory and visual signals. When round goby (Neogobius melanostomus) males become reproductive, they change from mottled grey to black and release sex steroids in their urine. In this study, we conducted a laboratory experiment to determine if reproductive female round gobies were attracted to a combination of olfactory (urine) and visual (silicone models) stimuli, representing reproductive and non-reproductive male round gobies. Females spent significantly more time at a nest with a black reproductive male model compared with a mottled non-reproductive male model. Neither urine type nor the interaction between model type and urine affected the time spent by reproductive females at a nest. Knowledge of the reproductive habits of the round goby may enable researchers to develop a method of species control for this invasive fish by manipulating its breeding habits.

Signatures of contamination in invasive round gobies (Neogobius melanostomus): A double strike for ecosystem health?

2010 ◽  
Vol 73 (7) ◽  
pp. 1755-1764 ◽  
Author(s):  
Julie R. Marentette ◽  
Krista L. Gooderham ◽  
Mark E. McMaster ◽  
Tania Ng ◽  
Joanne L. Parrott ◽  
...  
Keyword(s):  
Ecosystem Health ◽  
Neogobius Melanostomus ◽  
Round Gobies

scholarly journals Shape Analysis of Otoliths of the Round goby, Neogobius melanostomus (Gobiiformes, Gobiidae), from the Black Sea Basin

Zoodiversity ◽  
2021 ◽  
Vol 55 (4) ◽  
pp. 317-330
Author(s):  
V. Zamorov ◽  
M. Zamorova ◽  
D. Krupko ◽  
N. Matvienko ◽  
Y. Leonchyk ◽  
...  
Keyword(s):  
Discriminant Analysis ◽  
Black Sea ◽  
Sagittal Plane ◽  
Round Goby ◽  
Neogobius Melanostomus ◽  
The Black Sea ◽  
Strong Response ◽  
Linear Discriminant ◽  
The North ◽  
Round Gobies

The aim of this study was to assess the discriminability of the stocks of the round goby Neogobius melanostomus based on the shape of its otoliths. Recent otolith-shape-based species and stock discrimination studies were using otolith contours in sagittal plane and we are following this approach. We hypothesized the possibility of existence of several geographically separated populations of the round goby. Round gobies have been sampled from different locations of the North-Western Black Sea, otoliths were removed in course of the full biological analysis and photographed in sagittal plane. Principal components of the otolith contour were processed by linear discriminant analysis aiming to cross-validate the discriminability of round gobies placed at different geographical locations. This would allow demonstration of different stocks or populations. This research allows to conclude the limited applicability of otolith contours for discrimination of stocks or populations of round goby based on multiple annual samples. However, neither classification matrices of discriminant analysis nor cluster analysis dendrograms showed a single pattern except for the high year to year otoliths variability. This allows to hypothesise a strong response of contour formation to habitat and feeding conditions. However, this assumption needs to be verified by further studies.

The impact of introduced round gobies (Neogobius melanostomus) on phosphorus cycling in central Lake Erie

2005 ◽  
Vol 62 (1) ◽  
pp. 15-29 ◽  
Author(s):  
David B Bunnell ◽  
Timothy B Johnson ◽  
Carey T Knight
Keyword(s):  
Lake Erie ◽  
Round Goby ◽  
Neogobius Melanostomus ◽  
Phosphorus Cycling ◽  
High Mass ◽  
Introduced Fish ◽  
Bioenergetic Model ◽  
Phosphorus Excretion ◽  
Round Gobies ◽  
The Impact

We used an individual-based bioenergetic model to simulate the phosphorus flux of the round goby (Neogobius melanostomus) population in central Lake Erie during 1995–2002. Estimates of round goby diet composition, growth rates, and population abundance were derived from field sampling. As an abundant introduced fish, we predicted that round gobies would influence phosphorus cycling both directly, through excretion, and indirectly, through consumption of dreissenid mussels, whose high mass-specific phosphorus excretion enhances recycling. In 1999, when age-1+ round gobies reached peak abundance near 350 million (2.4 kg·ha–1), annual phosphorus excretion was estimated at 7 t (1.4 × 10–3 mg P·m–2·day–1). From an ecosystem perspective, however, round gobies excreted only 0.4% of the phosphorus needed by the benthic community for primary production. Indirectly, round gobies consumed <0.2% of dreissenid population biomass, indicating that round gobies did not reduce nutrient availability by consuming dreissenids. Compared with previous studies that have revealed introduced species to influence phosphorus cycling, round gobies likely did not attain a sufficiently high biomass density to influence phosphorus cycling in Lake Erie.

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