The diet of reservoir perch before, during and after establishment of non-native tubenose goby

0486016 - ÚBO 2019 RIV FR eng J - Journal Article
Všetičková, Lucie - Mikl, Libor - Adámek, Zdeněk - Prášek, Václav - Roche, Kevin Francis - Jurajda, Pavel
The diet of reservoir perch before, during and after establishment of non-native tubenose goby.
Knowledge and Management of Aquatic Ecosystems. Roč. 419, č. 419 (2018), č. článku 4. ISSN 1961-9502. E-ISSN 1961-9502
R&D Projects: GA ČR(CZ) GBP505/12/G112
Institutional support: RVO:68081766
Keywords : dietary shift * food preference * Gobiidae * invasive species * Perca fluviatilis * piscivore diet
OECD category: Marine biology, freshwater biology, limnology
Impact factor: 1.265, year: 2018
Method of publishing: Open access
https://www.kmae-journal.org/articles/kmae/abs/2018/01/kmae170103/kmae170103.html

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.
Permanent Link: http://hdl.handle.net/11104/0280909