Trophic interactions of two ponto-caspian gobies in the Turkish part of their native range

Authors: Tarkan, A.S., Karakuş, U., Tepeköy, E.G., Top, N., Yalçın-Özdilek, S., Partal, N. and Britton, J.

http://eprints.bournemouth.ac.uk/30163/

Journal: Turkish Journal of Fisheries and Aquatic Sciences

Publisher: Central Fisheries Research Institute

ISSN: 1303-2712

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.

This data was imported from Scopus:

Authors: Tarkan, A.S., Karakus, U., Tepekoy, E.G., Top, N., Ozdilek, S.Y., Partal, N. and Britton, J.R.

http://eprints.bournemouth.ac.uk/30163/

Journal: Turkish Journal of Fisheries and Aquatic Sciences

Volume: 18

Issue: 11

Pages: 1279-1286

ISSN: 1303-2712

DOI: 10.4194/1303-2712-v18_11_04

© Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey. 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 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.

This data was imported from Web of Science (Lite):

Authors: Tarkan, A.S., Karakus, U., Tepekoy, E.G., Top, N., Ozdilek, S.Y., Partal, N. and Britton, J.R.

http://eprints.bournemouth.ac.uk/30163/

Journal: TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES

Volume: 18

Issue: 11

Pages: 1279-1286

eISSN: 2149-181X

ISSN: 1303-2712

DOI: 10.4194/1303-2712-v18_11_04

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