Food resource partitioning between two invasive gobiid species (Pisces, Gobiidae) in the littoral zone of the river danube, Hungary

Péter Borza, Tibor Eros, Nándor Oertel

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

At present, the invasive round and bighead gobies are the most abundant benthic fish species in the near shore zone of the Middle Danube. We compared their diet seasonally in natural and artificial habitats and contrasted it with the food supply. The composition of the macroinvertebrate community was determined mainly by seasonal changes, whereas habitat type had smaller effect. Round gobies followed these changes flexibly. They consumed mainly chironomids in the spring, whilst amphipods and molluscs in the summer and autumn. Bighead gobies relied on amphipods in each season and in both habitats, and consumed fish, too, including round goby (intraguild predation). Diet overlap was determined by the morphological differences of the species allowing a varying degree of differentiation according to the seasonally changing food supply.

Original languageEnglish
Pages (from-to)609-621
Number of pages13
JournalInternational Review of Hydrobiology
Volume94
Issue number5
DOIs
Publication statusPublished - Oct 1 2009

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Keywords

  • Bighead goby
  • Diet overlap
  • Neogobius
  • Non-native species
  • Round goby

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

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