Trophic interactions of two Ponto-Caspian gobies in the Turkish part of their native range.

Tarkan, A.S., Karakuş, U., Tepeköy, E.G., Top, N., Yalçın-Özdilek, S., Partal, N. and Britton, J.R., 2018. Trophic interactions of two Ponto-Caspian gobies in the Turkish part of their native range. Turkish Journal of Fisheries and Aquatic Sciences. (In Press)

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DOI: 10.4194/1303-2712-v18_11_04

Abstract

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 δ13C and δ15N. 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 co-existing 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.

Item Type:Article
ISSN:1303-2712
Uncontrolled Keywords:monkey goby; tubenose goby; isotopic niche; niche plasticity; trophic relationships
Group:Faculty of Science & Technology
ID Code:30163
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:15 Jan 2018 15:40
Last Modified:14 Mar 2018 12:22

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