Contribution of organic matter sources to cyprinid fishes in the chany lakeKargat river estuary, western Siberia

Gen Kanaya, Elena N. Yadrenkina, Elena I. Zuykova, Eisuke Kikuchi, Hideyuki Doi, Shuichi Shikano, Chitoshi Mizota, Natalia I. Yurlova

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Although omnivorous cyprinid fish often dominate fish communities in shallow eutrophic lakes, their role in the food web is poorly known. In the present study, carbon sources of six cyprinid species were examined in a littoral freshwater habitat in a saline lake complex (Lake Chany, western Siberia, Russia) using stable isotope analyses (SIA). In this habitat, microalgae (phytoplankton and epiphytes), macrophytes and riparian vegetation comprised the major producer groups with distinctive 13C values. Zooplankton and most benthic invertebrates functioned primarily as microalgae-based consumers, whereas the amphipod Gammarus lacustris depended largely on macrophytes or macrophyte-derived detritus. Cyprinids, Carassius carassius L., Car. auratus gibelio Bloch. and Abramis brama L., mainly utilised microalgae-derived carbon (13C-based isotope mixing model: 6697%) via zooplanktonic trophic mediations. In contrast, Cyprinus carpio L., Leuciscus idus L. and Rutilus rutilus L. depended more on macrophytic and/or riparian production (5280%) than on microalgal production. Observations and SIA of foregut contents indicated highly opportunistic feeding habits of R. rutilus and L. idus and preference for macrophytes. These results suggested that cyprinid fishes link pelagic, benthic and riparian food webs in this shallow, eutrophic lake ecosystem.

Original languageEnglish
Pages (from-to)510-518
Number of pages9
JournalMarine and Freshwater Research
Volume60
Issue number6
DOIs
Publication statusPublished - 2009 Jul 28

Keywords

  • Food sources
  • Isotopic mixing model
  • Macrophytes
  • Omnivorous fish
  • Phytoplankton.
  • δC and δN

ASJC Scopus subject areas

  • Oceanography
  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

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    Kanaya, G., Yadrenkina, E. N., Zuykova, E. I., Kikuchi, E., Doi, H., Shikano, S., Mizota, C., & Yurlova, N. I. (2009). Contribution of organic matter sources to cyprinid fishes in the chany lakeKargat river estuary, western Siberia. Marine and Freshwater Research, 60(6), 510-518. https://doi.org/10.1071/MF08108