Habitat and diet interactions in a lowland temperate river suggests no direct impact of non-native monkey goby (Neogobius fluviatilis) on native spined loach (Cobitis taenia)

Authors: Btońska, D., Pyrzanowski, K., Leszczyńska, J., Janic, B., Kobak, J., Grabowska, J. and Tarkan, A.S.

Journal: Neobiota

Volume: 97

Pages: 237-256

eISSN: 1314-2488

ISSN: 1619-0033

DOI: 10.3897/NEOBIOTA.97.136780

Abstract:

Non-native species can negatively impact native ecosystems, but their introduction does not always lead to major ecological changes. This study examines interactions between the non-native monkey goby (Neogobius fluviatilis) and the native spined loach (Cobitis taenia) through field observations and controlled laboratory experiments. We assessed microhabitat use, dietary similarities, and behavioral interactions between the two species. Field results revealed overlapping microhabitats dominated by coarse sand, but with no significant displacement of the spined loach by the monkey goby. Laboratory trials further supported these findings, showing no competitive interference in habitat selection, with both species co-occupying preferred substrates (coarse sand). Diet analysis indicated limited trophic overlap (17%), suggesting resource partitioning rather than direct competition. The results show no evidence that the non-native monkey goby exerts direct harmful effects on the native spined loach in the river studied. Instead, our study highlights the potential for coexistence, emphasizing the need for nuanced approaches in assessing the ecological impacts of non-native species. However, it should also be noted that our results are time and space-limited, and indirect and/or long-term effects, not captured by this study, may exist. Current research contributes to a broader understanding of complex biotic interactions between non-native and resident species.

Source: Scopus