<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>Time-series of the species caught in a complex of four fyke nets that were monitored and recorded by a team of volunteer fishers provided the basis for identifying trends in the changes of fish assemblages during the 1995-2006 period. The fish assemblages exhibited strong seasonality with herring, <italic>Clupea harengus</italic> L. domination during spring. In the summer season, juvenile pikeperch, <italic>Sander lucioperca</italic> (L.) and ruffe, <italic>Gymnocephalus cernuus</italic> (L.), were dominant in number. The relative abundance of eel, <italic>Anguilla anguilla</italic> (L.) exhibited a clearly decreasing trend due to fishery exploitation and the lack of stocking. The decreased share of the largest pikeperch individuals suggested that this species is being overexploited. Ruffe exhibited a strong decline more probably due to strong impact from numerous black cormorants. Increased abundance was observed in the case of roach, <italic>Rutilus rutilus</italic> (L.), flounder, <italic>Platichthys flesus</italic> (L.) and round goby, <italic>Neogobius melanostomus</italic> (Pall.), a new species in ecosystem.</p></abstract>

Time-series of the species caught in a complex of four fyke nets that were monitored and recorded by a team of volunteer fishers provided the basis for identifying trends in the changes of fish assemblages during the 1995-2006 period. The fish assemblages exhibited strong seasonality with herring, Clupea harengus L. domination during spring. In the summer season, juvenile pikeperch, Sander lucioperca (L.) and ruffe, Gymnocephalus cernuus (L.), were dominant in number. The relative abundance of eel, Anguilla anguilla (L.) exhibited a clearly decreasing trend due to fishery exploitation and the lack of stocking. The decreased share of the largest pikeperch individuals suggested that this species is being overexploited. Ruffe exhibited a strong decline more probably due to strong impact from numerous black cormorants. Increased abundance was observed in the case of roach, Rutilus rutilus (L.), flounder, Platichthys flesus (L.) and round goby, Neogobius melanostomus (Pall.), a new species in ecosystem.

The stability of fish assemblages under unstable conditions: A ten-year series from the Polish part of the Vistula Lagoon

Department of Fishery Resources, Sea Fisheries Institute, Kollataja 1, 81-332 Gdynia, Poland

Department of Ichthyology, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn, Poland

Fisheries & Aquatic Life

Time-series of the species caught in a complex of four fyke nets that were monitored and recorded by a team of volunteer fishers provided the basis for...

The stability of fish assemblages under unstable conditions: A ten-year series from the Polish part of the Vistula Lagoon

Pubblicato online: 17 lug 2009

Pagine: 65 - 76

DOI: https://doi.org/10.2478/v10086-009-0004-1

Parole chiave
herring, bream, eel, pikeperch, round goby, ruffe, fyke net

This content is open access.

The stability of fish assemblages under unstable conditions: A ten-year series from the Polish part of the Vistula Lagoon

Pubblicato online: 17 lug 2009

Pagine: 65 - 76

DOI: https://doi.org/10.2478/v10086-009-0004-1

Parole chiaveherring, bream, eel, pikeperch, round goby, ruffe, fyke net

This content is open access.

Parole chiave
herring, bream, eel, pikeperch, round goby, ruffe, fyke net