Seasonal patterns in round goby (Neogobius melanostromus) catch rates, catch composition, and dietary quality

Brauer, Meike; Behrens, Jane; Christoffersen, Mads; Hyldig, Grethe; Jacobsen, Charlotte; Björnsdottir, Katla Hrund; Deurs, Mikael van

doi:10.1016/j.fishres.2019.105412

Cited by 15 publications

(17 citation statements)

References 52 publications

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“…that grey heron (Ardea cinerea) population has increased in the southern Baltic Sea because of the rapid expansion of the round goby (Jakubas 2004). Our study evidenced that the distribution area of the round goby only moderately overlaps with that of one of the most abundant coastal predatory fishes perch), but this overlap undoubtedly offers a new (potentially) nutritionally profitable prey resource for the coastal piscivorous species (Brauer et al 2020). This also adds to Liversage et al (2017), who found that round goby densities do not significantly affect perch feeding, which is most likely affected by other environmental factors.…”

Section: The Ecological Implications Of Biomass Movement: Round Goby As a Competitormentioning

confidence: 50%

Seasonal depth distribution and thermal experience of the non-indigenous round goby Neogobius melanostomus in the Baltic Sea: implications to key trophic relations

et al. 2021

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Native to the Ponto-Caspian region, the benthic round goby (Neogobius melanostomus) has invaded several European inland waterbodies as well as the North American Great Lakes and the Baltic Sea. The species is capable of reaching very high densities in the invaded ecosystems, with not only evidence for significant food-web effects on the native biota and habitats, but also negative implications to coastal fishers. Although generally considered a coastal species, it has been shown that round goby migrate to deeper areas of the Great Lakes and other inland lakes during the cold season. Such seasonal movements may create new spatio-temporal ecosystem consequences in invaded systems. To seek evidence for seasonal depth distribution in coastal marine habitats, we compiled all available catch data for round goby in the Baltic Sea since its invasion and until 2017. We furthermore related the depths at capture for each season with the ambient thermal environment. The round goby spend autumn and winter at significantly deeper and offshore areas compared to spring and summer months; few fish were captured at depths < 25 m in these colder months. Similarly, in spring and summer, round goby were not captured at depths > 25 m. The thermal conditions at which round goby were caught varied significantly between seasons, being on average 18.3 °C during summer, and dropping to a low 3.8 °C during winter months. Overall, the fish sought the depths within each season with the highest possible temperatures. The spatial distribution of the round goby substantially overlaps with that of its main and preferred prey (mussels) and with that of its competitor for food (flatfish), but only moderately with the coastal predatory fish (perch), indicating thereby very complex trophic interactions associated with this invasion. Further investigations should aim at quantifying the food web consequences and coupling effects between different habitats related to seasonal migrations of the round goby, both in terms of the species as a competitor, predator and prey.

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Section: The Ecological Implications Of Biomass Movement: Round Goby As a Competitormentioning

confidence: 50%

Seasonal depth distribution and thermal experience of the non-indigenous round goby Neogobius melanostomus in the Baltic Sea: implications to key trophic relations

et al. 2021

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“…Ozden et al [ 36 ] found comparable MUFA levels in horse mackerel from the Marmara Sea, while Chuang et al [ 21 ] found higher levels (37.5%) for the same species from the Black Sea. Merdzhanova and Dobreva [ 24 ] reported similar data for Black Sea round goby MUFAs content, whereas Brauer et al [ 43 ] reported significantly lower MUFAs (average 14.6% of total FAs) for round goby. Our results differ from those reported by Kocatepe and Turan [ 20 ] for Black Sea anchovy MUFA (only 19.5%) and are close to garfish and bluefish MUFA levels.…”

Section: Discussionmentioning

confidence: 86%

Can Fish and Shellfish Species from the Black Sea Supply Health Beneficial Amounts of Bioactive Fatty Acids?

et al. 2021

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Fatty acids (FA) are among the most important natural biologically active compounds. A healthy diet involves the intake of different fatty acids especially from omega-3 (n-3) series. Seafood provides a very good source of polyunsaturated fatty acids (PUFAs), but in Bulgaria there is limited information regarding the n-3 PUFA contents in traditionally consumed seafood by the population. The aims of this study were to determine lipid content, omega-3 polyunsaturated fatty acids (EPA and DHA), and the recommended daily intake of eleven fish species, three bivalves, rapana, and shrimp harvested in the Western part of Black Sea, Bulgaria. Total lipids were extracted according to the method of Blight and Dyer and fatty acid composition was analyzed by GC/MS. Fatty acid profile showed differences among species. PUFA were found in high content among total lipids, especially in shellfish (60.67–68.9% of total lipids) compared to fish species (19.27–34.86% of total lipids). EPA was found in higher amounts in rapana (0.16 g/100 g ww) and two of pelagic species (up to 0.29 g/100 g ww), whereas DHA prevailed in demersal and the most of pelagic fish (0.16–1.92 g/100 g ww) and bivalves (0.16–1.92 g/100 g ww). The health beneficial n3/n6 and PUFA/SFA ratios were found in all analyzed species. The lower values of the lipid nutritional quality indices (AI < 1, TI < 1) and higher for h/H index (0.8–1.78 for fish and 1.52 to 4.67 for bivalves and shrimp) confirm that the commonly consumed Black Sea fish and shellfish may provide health benefits for local populations. This study shows the seafood amounts that can provide the minimum recommended intake of omega-3 polyunsaturated fatty acids.

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“…Round gobies were not observed at Stege Bugt until later, in 2011 (Azour et al 2015), which was likely colonized via secondary dispersal from Guldborgsund. Both are shallow brackish areas where local fishermen continue to catch large quantities of round goby as bycatch (Brauer et al 2020).…”

Section: Article (Brief Communication Format)mentioning

confidence: 99%

Impacts of the invasive round goby (Neogobius melanostomus) on benthic invertebrate fauna: a case study from the Baltic Sea

Deurs¹,

Moran²,

Plet-Hansen³

et al. 2021

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Non-indigenous animals can impact native fauna via predation and competition for food and habitat. The round goby (Neogobius melanostomus) was first observed in the Baltic Sea in 1990 and has since displayed substantial secondary dispersal, establishing numerous dense populations where they may outcompete native fish and negatively impact prey species. There have been multiple round goby diet studies from both the Baltic Sea and the North American Great Lakes where they are similarly invasive. However, studies that quantify their effects on recipient ecosystems and, specifically, their impacts on the benthic invertebrate macrofauna are rare, particularly from European waters. In this study, we conducted the first before-after study of the potential effects of round goby on benthic invertebrate macrofauna taxa in marine-brackish habitats in Europe, focusing of two sites in the Western Baltic Sea, Denmark. Results were in line with those from the Great Lakes, indicating negative impacts to be focused on specific molluscan taxa, particularly gastropods, while other groups appeared to be largely unaffected or even show positive trends following invasion. Round goby gut content data was available at one of our study sites from the period immediately after the invasion. This data confirmed that round goby had in fact been preying on the subset of taxa displaying negative trends.

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Seasonal patterns in round goby (Neogobius melanostromus) catch rates, catch composition, and dietary quality

Cited by 15 publications

References 52 publications

Seasonal depth distribution and thermal experience of the non-indigenous round goby Neogobius melanostomus in the Baltic Sea: implications to key trophic relations

Seasonal depth distribution and thermal experience of the non-indigenous round goby Neogobius melanostomus in the Baltic Sea: implications to key trophic relations

Can Fish and Shellfish Species from the Black Sea Supply Health Beneficial Amounts of Bioactive Fatty Acids?

Impacts of the invasive round goby (Neogobius melanostomus) on benthic invertebrate fauna: a case study from the Baltic Sea

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