The diet of reservoir perch before, during and after establishment of non-native tubenose goby
| Autor: | Lucie Všetičková, Kevin Roche, Pavel Jurajda, Václav Prášek, Zdeněk Adámek, Libor Mikl |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
piscivore diet Population Zoology Management Monitoring Policy and Law Aquatic Science 010603 evolutionary biology 01 natural sciences Invasive species lcsh:Aquaculture. Fisheries. Angling Predation invasive species Proterorhinus semilunaris Littoral zone education Dietary shift Nature and Landscape Conservation Water Science and Technology lcsh:SH1-691 education.field_of_study Perch Ecology biology 010604 marine biology & hydrobiology Goby biology.organism_classification Food web Perca fluviatilis food preference Gobiidae |
| Zdroj: | Knowledge and Management of Aquatic Ecosystems, Vol 0, Iss 419, p 4 (2018) |
| ISSN: | 1961-9502 |
| Popis: | In recent decades, gobiid species have increased their distribution throughout Europe and now often represent the dominant genus along many rivers and canals. In this study, we assessed the role of tubenose goby (Proterorhinus semilunaris) as a prey species of native perch (Perca fluviatilis) in a lowland reservoir soon after their initial introduction in 1994 (sampling started 1998) and 17 years after establishment (2011–2012). We compare these data with perch diet composition from before introduction (1981–1982). Our data indicate that tubenose gobies quickly became the dominant species along the reservoir bankside, making them an attractive prey for ≥1 + perch. There was a clear increasing trend in the numbers of larger perch caught along the rip-rap, with the largest fish clearly specialising on gobies. As such, introduction of tubenose gobies has had a pronounced effect on food web and population dynamics along the littoral zone. While goby numbers appear to have dropped significantly in recent years, apparently due to predation pressure, further studies are needed to assess whether such changes have had any general impact on population and food web dynamics within the reservoir. |
| Databáze: | OpenAIRE |
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