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

2019 ◽  
Vol 26 (2) ◽  
pp. 172-182 ◽  
Author(s):  
Mads Christoffersen ◽  
Jon C. Svendsen ◽  
Jane W. Behrens ◽  
Niels Jepsen ◽  
Mikael van Deurs
Keyword(s):  
Baltic Sea ◽  
Acoustic Telemetry ◽  
Round Goby ◽  
Neogobius Melanostomus ◽  
Seasonal Migration ◽  
Diel Activity

scholarly journals Feeding activity and diet composition of round goby (Neogobius melanostomus, Pallas 1814) in the coastal waters of SE Baltic Sea

2015 ◽  
Vol 44 (4) ◽  
Author(s):  
Artūras Skabeikis ◽  
Jūratė Lesutienė
Keyword(s):  
Baltic Sea ◽  
Coastal Waters ◽  
Diet Composition ◽  
Feeding Activity ◽  
Macoma Balthica ◽  
Round Goby ◽  
Benthic Fauna ◽  
Neogobius Melanostomus ◽  
The Body ◽  
Gut Contents

AbstractFeeding activity and diet composition of round goby were investigated in the south-eastern Baltic Sea, the Lithuanian coastal waters during May-October 2012 in order to determine main feeding objects and seasonal periods when native fauna could be most affected by predation of this highly invasive species. In total, prey represented by 18 taxa was found in the gut contents of dissected fish. Feeding activity of round goby varied depending on the body size, sex and stage of the reproduction period. The gut contents of < 50 mm specimens were dominated by zooplanktonic and meiobenthic organisms, whereas larger individuals (50–99 mm) shifted to amphipods and mollusks. Individuals of the intermediate 100-200 mm length had a variable diet, changing depending on the season; in spring they mostly preyed on Macoma balthica, in summer − on polychaetes, while in autumn the contribution of Mytilus trossulus and fish considerably increased in their diet. Diet composition of individuals ≥ 200 mm was relatively constant in the course of the study with substantial preference to M. balthica. These findings imply that benthic fauna, particularly a newly settled generation of epibenthic mollusks in autumn is under strong predatory pressure of the round goby.

Effects of acoustic telemetry transmitters on gill ventilation rate and haematocrit levels of round goby Neogobius melanostomus

2017 ◽  
Vol 24 (5) ◽  
pp. 416-419 ◽  
Author(s):  
J. W. Behrens ◽  
J. C. Svendsen ◽  
M. van Deurs ◽  
M. Sokolova ◽  
M. Christoffersen
Keyword(s):  
Acoustic Telemetry ◽  
Round Goby ◽  
Ventilation Rate ◽  
Neogobius Melanostomus ◽  
Gill Ventilation

scholarly journals Increasing Population of the Invader Round Goby, Neogobius Melanostomus (Actinopterygii: Perciformes: Gobiidae), and its Trophic Role in the Curonian Lagoon, Se Baltic Sea

2013 ◽  
Vol 43 (2) ◽  
pp. 95-108 ◽  
Author(s):  
Vytautas Rakauskas ◽  
Žilvinas Pūtys ◽  
Justas Dainys ◽  
Jūratė Lesutienė ◽  
Linas Ložpys ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Round Goby ◽  
Neogobius Melanostomus ◽  
Curonian Lagoon ◽  
Trophic Role

scholarly journals Population characteristics of the non-indigenous round goby, Neogobius melanostomus (Actinopterygii: Perciformes: Gobiidae), in the eastern Gulf of Finland

2021 ◽  
Vol 51 (3) ◽  
pp. 327-337
Author(s):  
Anton Uspenskiy ◽  
Anastasia Yurtseva ◽  
Dmitry Bogdanov
Keyword(s):  
Baltic Sea ◽  
Round Goby ◽  
Neogobius Melanostomus ◽  
Population Characteristics ◽  
Gulf Of Finland ◽  
Shallow Waters ◽  
Northern Coast ◽  
The Baltic Sea ◽  
Unit Effort ◽  
The Baltic

The round goby, Neogobius melanostomus (Pallas, 1814), is a fish of Ponto-Caspian origin that has been invading the Baltic Sea since the 1990s. Currently, it is abundant and commercially important in some areas of the sea. This species was first reported in the eastern Gulf of Finland (GoF) in 2012. Its occurrence increased thereafter, however it has remained largely unstudied in this region. The aim of this study was to investigate the population characteristics of the round goby in the eastern GoF to better understand its expansion trend and whether it will become abundant enough to be exploited by the local fishery. Fish were caught using multi-mesh gillnets (12–60 mm mesh) and a beach seine (0.5–10 mm mesh). Occurrence, density, catch per unit effort, biomass per unit effort, relative number and biomass in catches, as well as age, size and sex ratio were studied. The species regularly occurred in samplings along the southern coastline of the GoF, as well as some central areas and along the northern coast. Within 2012–2019, its occurrence in catches increased, with the highest frequency in 2015–2019 in shallow waters (&lt;1.5 m) of Koporye Bay (70%) and in the deeper waters of Narva Bay (74%). Similarly, the highest density in the shallow waters was also observed in Koporye Bay (10.0 ind. ∙ 100 m−2), and offshore in Narva Bay. Relative abundance and biomass usually did not exceed 23%, although it reached 93% in Narva Bay. The oldest specimen was five years old. Young-of-the-year (YOY) juveniles predominated in the shallow waters (85%), while three-year-olds prevailed in deeper waters (75%). Among the fish older than two years, females were more predominant (mean ratio 3 to 1), and males were larger than females. Specimens in all life stages were found in the eastern GoF, and their abundance increased annually, suggesting that the round goby has successfully colonized this region of the Baltic Sea. However, compared to other areas of the Baltic Sea inhabited by longer-established populations, its population size is still relatively low.

scholarly journals Parasite infection of the non-indigenous round goby (Neogobius melanostomus) in the Baltic Sea

2020 ◽  
Vol 15 (1) ◽  
pp. 160-176 ◽  
Author(s):  
Henn Ojaveer ◽  
Aleksei Turovski ◽  
Kristiina Nõomaa
Keyword(s):  
Baltic Sea ◽  
Round Goby ◽  
Parasite Infection ◽  
Neogobius Melanostomus ◽  
The Baltic Sea ◽  
The Baltic
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