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Willebrand, Sofia, 2015. Habitat preference of Neogobius Melanostomus in the Baltic Sea : habitat modelling of an invasive species. First cycle, G2E. Uppsala: SLU, Department of Aqatic Resources

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Abstract

Round goby, neogobius melanosotmus, is an invasive fish that has spread to the Baltic Sea from the Black sea. The invasion is most likely an effect of transport with ballast water. So far little is known of the impact of round goby in the invaded area, but changes in the food web structure have been observed in the Baltic Sea. In this study the habitat preference of round goby was examined using GAM-modelling and thereafter maps over predicted occurrence were created to see its capacity of further spreading in the Baltic Sea. Monitoring data were gathered from the Baltic Sea, minus the Gulf of Bothnia. Variable data were gathered from rasters via ArcMap, with complementing data for depth measured during monitoring. The result of GAM-modelling shows that the round goby prefers areas close to shipping traffic, with a low percentage in slope, shallow waters, moderately exposed areas and above for wave exposure, with a salinity up to 8 psu. The maps over predicted occurrence shows a probable continued spread along the shallow coasts in the monitored area. The results support earlier knowledge of round goby; however, as the fish spreads further in the Baltic Sea the relationship with other environmental variables may change as it is still competing to find its place in the ecosystem. As the fish has capacity to spread further, more knowledge of how to hinder this inva-sive fish is needed.

Main title:Habitat preference of Neogobius Melanostomus in the Baltic Sea
Subtitle:habitat modelling of an invasive species
Authors:Willebrand, Sofia
Supervisor:Florin, Ann-Britt and Bergström, Ulf
Examiner:Bryhn, Andreas
Series:UNSPECIFIED
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2015
Level and depth descriptor:First cycle, G2E
Student's programme affiliation:NK001 Biology and Environmental Science - Bachelor's Programme 180 HEC
Department:(NL, NJ) > Department of Aqatic Resources
Keywords:Neogobius melanostomus, habitat preference, GAM-modelling, invasive
URN:NBN:urn:nbn:se:slu:epsilon-s-4425
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-4425
Subjects:Animal ecology
Aquatic ecology
Language:English
Additional Information:The research leading to these results has also received funding from BONUS (INSPIRE project), the joint Baltic Sea research and development programme (Art 185), funded jointly from the European Union’s Seventh Frame-work Programme for Research, Technological Development and Demonstration, and from the Swedish Research Council Formas.
Deposited On:09 Jun 2015 11:34
Metadata Last Modified:09 Jun 2015 11:34

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