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Round goby Neogobius melanostomus in the Baltic Sea – Invasion Biology in practice
Stockholm University, Faculty of Science, Department of Systems Ecology.
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Human mediated transfer of non-indigenous species is considered to be a major threat to global biodiversity. The Ponto-Caspian round goby (Neogobius melanostomus), which has established populations in various regions in Eurasia and North-America, was first observed in Gulf of Gdańsk, Baltic Sea, in 1990. In this thesis the round goby is used as case study for assessing the invasion process of an alien species in to the Baltic Sea. Factors governing life history characteristics, traits that have enhanced the invasion, and ecological consequences for the Baltic Sea are assessed. Two diverging life history strategies of the round goby related to habitat were found: one to-wards early maturation and short population turnover time in sheltered areas, the other towards high growth rate and late maturation in exposed areas. Females produced two batches in average during the spawning season. Lengths of spawning season and annual fecundity of round gobies in Gulf of Gdańsk were in the same range as in the donor region. The species was found to compete with juvenile flounder for space and food resources, and probably also other native species are affected in coastal areas. Round goby comprised a main food source for cod and perch, forming a new energetic pathway between mussels and predatory fish. It is predicted that the species must produce more than one batch per season to sustain a viable population. Low temperature in the northern Baltic Sea is expected to hamper the devel-opment of new round goby populations, however, the global climate change might change this situation. In the southern Baltic Sea a shortage of optimal reproduction habitats is suggested to moderate the rate of spread. Although round goby in the Gulf of Gdańsk seems to have passed abundance maximum it is likely that the species will continue to be an important ecosystem component, at least in southern Baltic Sea, in the future.

Place, publisher, year, edition, pages
Stockholm: Systemekologiska institutionen , 2008. , 154 p.
Keyword [en]
Round goby, Neogobius melanostomus, Apollonia melanostoma, non-indigenous fish, life history characteristics, predation, competition, Gulf of Gdańsk, Baltic Sea.
National Category
Ecology
Research subject
Marine and Brackish Water Ecology
Identifiers
URN: urn:nbn:se:su:diva-7450ISBN: 978-91-7155-621-9 (print)OAI: oai:DiVA.org:su-7450DiVA: diva2:198309
Public defence
2008-04-25, De Geersalen, Geovetenskapens hus, Svante Arrhenius väg 8 A, Stockholm, 10:00
Opponent
Supervisors
Available from: 2008-04-04 Created: 2008-03-28Bibliographically approved
List of papers
1. Life History Characteristics of the Invasive Round Goby in Different Habitats in the Southern Baltic Sea
Open this publication in new window or tab >>Life History Characteristics of the Invasive Round Goby in Different Habitats in the Southern Baltic Sea
In: Journal of the Great Lakes ResearchArticle in journal (Refereed) In press
Identifiers
urn:nbn:se:su:diva-24781 (URN)
Note
Part of urn:nbn:se:su:diva-7450Available from: 2008-04-04 Created: 2008-03-28 Last updated: 2010-01-14Bibliographically approved
2. Annual Fecundity of Round Goby in the Gulf of Gdansk, Southern Baltic Sea
Open this publication in new window or tab >>Annual Fecundity of Round Goby in the Gulf of Gdansk, Southern Baltic Sea
Manuscript (Other academic)
Identifiers
urn:nbn:se:su:diva-24782 (URN)
Note
Part of urn:nbn:se:su:diva-7450Available from: 2008-04-04 Created: 2008-03-28 Last updated: 2010-01-13Bibliographically approved
3. Indications of competition between non-indigenous round goby and native flounder in the Baltic Sea.
Open this publication in new window or tab >>Indications of competition between non-indigenous round goby and native flounder in the Baltic Sea.
2007 In: ICES Journal of Marine Science, Vol. 64, 479 - 486 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-24783 (URN)
Note
Part of urn:nbn:se:su:diva-7450Available from: 2008-04-04 Created: 2008-03-28Bibliographically approved
4. Has the invasive Round goby caused new links in Baltic food webs?
Open this publication in new window or tab >>Has the invasive Round goby caused new links in Baltic food webs?
Manuscript (Other academic)
Identifiers
urn:nbn:se:su:diva-24784 (URN)
Note
Part of urn:nbn:se:su:diva-7450Available from: 2008-04-04 Created: 2008-03-28 Last updated: 2010-01-13Bibliographically approved
5. The effects of propagule pressure and age-specific alterations in demographic parameters on the establishment of the round goby in the Baltic Sea.
Open this publication in new window or tab >>The effects of propagule pressure and age-specific alterations in demographic parameters on the establishment of the round goby in the Baltic Sea.
Manuscript (Other academic)
Identifiers
urn:nbn:se:su:diva-24785 (URN)
Note
Part of urn:nbn:se:su:diva-7450Available from: 2008-04-04 Created: 2008-03-28 Last updated: 2010-01-13Bibliographically approved

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