Range Expansion of Rotan Perccottus glenii, Sunbleak Leucaspius delineatus, and Bleak Alburnus alburnus in the Ob River Basin
A. N. RESHETNIKOV1, A. S. GOLUBTSOV1,2, V. B. ZHURAVLEV3, S. L. LOMAKIN4, A. S. REZVYI5
1Severtsov Ecology and Evolution Institute, RAS, 119071, Moscow, Leninskiy ave., 33
2Papanin Institute of Biology of Inland Waters, RAS, 152742, Borok, Nekouz, Yaroslavl Oblast
3Altai State University, 656049, Barnаul, Leninа str., 11
4Altai Branch of Upper-Ob "GLAVRYBVOD", 656056, Barnаul, Leninа str., 8
5Museum of Nature and Man, 628011, Khanty-Mansiysk, Mira str., 11
Keywords: ареал, Западная Сибирь, Обь, Иртыш, чужеродный вид, range, West Siberia, Ob, Irtysh, alien species
Abstract
Ranges of three studied alien fish species (rotan Perccottus glenii , sunbleak Leucaspius delineaus , and bleak Alburnus alburnus ) in the Ob River basin, West Siberia, have expanded. Our data prove the expansion of rotan and sunbleak ranges to the north. In particular, for the first time populations of rotan have been reported from the lower section of the Ob. We also present new data on range expansion of the studied fish species southward. All three species have probably reached southern limits of their possible distribution in the Upper Ob system getting into potamon/rhithron transition zone because the species under study prefer lowland waters. Spatial-temporal dynamics of their expansion reveals the role of the Ob River as the main invasion corridor enhancing their distribution mostly in meridional direction. In the system of the Upper Ob, rotan and sunbleak were found by us in isolated ponds and lakes as well as in floodplain and river systems. This is in agreement with the concept of two invasion vectors: translocation of fish by humans between water bodies and self-distribution along the river courses.
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