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Relative abundance of Ponto‐Caspian gobiids in the lower Vistula River (Poland) 3‐ to 4 years after first appearance
Author(s) -
Kakareko By T.,
Plłąchocki D.,
Kobak J.
Publication year - 2009
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/j.1439-0426.2009.01301.x
Subject(s) - rutilus , leuciscus , biology , goby , neogobius , perch , fishery , zoology , cobitidae , round goby , abundance (ecology) , ecology , fish <actinopterygii>
Summary In the years 2000–2001, specimens of two Ponto‐Caspian gobiids (racer goby Neogobius gymnotrachelus and monkey goby Apollonia fluviatilis ) were recorded for the first time in the lower Vistula River, which is a part of the central inland corridor used by Ponto‐Caspian species to migrate in Europe. In 2004, seine net surveys were made in the river course to examine relative abundance of the non‐indigenous gobiids in the local small‐fish community. Altogether 4420 specimens with total lengths ranging from 10 to 340 mm (mostly <100 mm) belonging to 18 species were recorded in 70 hauls. Monkey goby was one of the subdominant species (18.1% of total number of fish captured; 64.3% frequency of occurrence in hauls) together with bleak Alburnus alburnus (21.0, 54.3), roach Rutilus rutilus (18.2, 67.1) and three‐spined stickleback Gasterosteus aculaetus (17.3, 37.1). Racer goby was less abundant but quite common (2.5, 32.9), similar to common bream/white bream Abramis brama/Blicca bjoerkna (6.4, 47.1), Eurasian perch Perca fluviatilis (5.7, 57.1), dace Leuciscus leuciscus (4.2, 40.0) and European bitterling Rhodeus sericeus amarus (3.4, 27.1). The study shows that Ponto‐Caspian gobiids dispersed successfully in the lower Vistula, becoming species common to its nearshore zone 3‐ to 4 years after their first appearance.