Skip to main content

Interactions of invasive pumpkinseed with a riverine endemic fish indicate trophic overlap but minimal consequences for somatic growth and condition.

Karakuş, U., Tarkan, A. S., Yalçin-Özdilek, Ş., Top-Karakuş, N., Partal, N. and Britton, J R., 2023. Interactions of invasive pumpkinseed with a riverine endemic fish indicate trophic overlap but minimal consequences for somatic growth and condition. Knowledge and Management of Aquatic Ecosystems, 424, 13.

Full text available as:

[img]
Preview
PDF (OPEN ACCESS ARTICLE)
kmae230025.pdf - Published Version
Available under License Creative Commons Attribution No Derivatives.

1MB

DOI: 10.1051/kmae/2023010

Abstract

The North American invasive fish pumpkinseed Lepomis gibbosus has been associated with some detrimental ecological consequences in some parts of its invasive range. Here, we tested the trophic interactions of pumpkinseed with the endemic stream fish Aegean chub Squalius fellowesii ('chub') in a Mediterranean-type water course in SW Anatolia, Turkey, using a bulk stable isotope approach (d13C, d15N). Seven sampling sites were able to be grouped as chub in pumpkinseed presence (n=2) and absence (n=3), and pumpkinseed in chub absence (n=2). Across these groups, stable isotope metrics revealed that chub trophic (isotopic) niche size was similar in pumpkinseed presence/absence, but pumpkinseed had a larger niche in chub presence. In sites where they are co-habited, their niches showed some convergence, but with no apparent consequences for their growth or body condition, suggesting there were minimal ecological consequences of this sharing of food resources. These results suggest that the trophic consequences of this riverine invasion of pumpkinseed on this endemic chub was minimal.

Item Type:Article
ISSN:1961-9502
Uncontrolled Keywords:Stable isotope analysis; freshwater fish; growth index; diet overlap
Group:Faculty of Science & Technology
ID Code:38666
Deposited By: Symplectic RT2
Deposited On:08 Jun 2023 07:37
Last Modified:08 Jun 2023 07:37

Downloads

Downloads per month over past year

More statistics for this item...
Repository Staff Only -