Trophic Interactions of Two Ponto-Caspian Gobies in the Turkish Part of Their Native Range

TARKAN A. S., Karakus U., Tepekoy E. G., Top N., YALÇIN ÖZDİLEK Ş., Partal N., ...More

TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES, vol.18, no.11, pp.1279-1286, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 18 Issue: 11
  • Publication Date: 2018
  • Doi Number: 10.4194/1303-2712-v18_11_04
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.1279-1286
  • Keywords: Monkey goby, tubenose goby, isotopic niche, niche plasticity, trophic relationships, ROUND NEOGOBIUS-MELANOSTOMUS, STABLE-ISOTOPE ANALYSES, GREAT-LAKES, PROTERORHINUS-SEMILUNARIS, FISH, GOBY, DIET, GROWTH, TURKEY, RIVER
  • Çanakkale Onsekiz Mart University Affiliated: Yes


Several Ponto-Caspian gobiids have expanded from their native distribution ranges to Europe and North America. As knowledge on their bio-ecological features in their native range is still limited, the trophic ecology of monkey goby Neogobius fluviatilis and Western tubenose goby Proterorhinus semilunaris was studied in three natural lakes in the Marmara Region of NW Turkey using the stable isotopes of delta C-13 and delta N-15. In two of the lakes, the trophic niches ( as the isotopic niche) of the gobies were highly divergent with co-existing native fishes, with no overlap. Moreover, mixing models suggests considerable inter-specific dietary differences. In all lakes, the trophic niches of gobies were never significantly larger than those of coexisting fishes. These results suggest that when introduced outside of their natural range, the gobies might integrate into new fish communities via exploiting resources that are underexploited by native fishes or will initially share resources with these species before their niches diverge, perhaps through competitive displacement.