Heated competition: how climate change will affect non-native pumpkinseed Lepomis gibbosus and native perch Perca fluviatilis interactions in the U.K.
Article first published online: 8 NOV 2011
© 2011 Crown Copyright. Journal of Fish Biology © 2011 The Fisheries Society of the British Isles
Journal of Fish Biology
Special Issue: Fish Diversity and Conservation: Current State of Knowledge
Volume 79, Issue 6, pages 1592–1607, December 2011
How to Cite
Fobert, E., Fox, M. G., Ridgway, M. and Copp, G. H. (2011), Heated competition: how climate change will affect non-native pumpkinseed Lepomis gibbosus and native perch Perca fluviatilis interactions in the U.K. Journal of Fish Biology, 79: 1592–1607. doi: 10.1111/j.1095-8649.2011.03083.x
- Issue published online: 2 DEC 2011
- Article first published online: 8 NOV 2011
- interspecific competition;
- invasive species;
Heated and ambient temperature experimental ponds were used to examine competition between introduced pumpkinseed Lepomis gibbosus and native perch Perca fluviatilis in England, U.K., and how these interactions are likely to change under climate warming conditions. Results from three sets of two-week experiments indicated that in both species and in all sets, growth was faster in heated than in ambient temperature ponds. Growth of both P. fluviatilis and L. gibbosus in sympatry did not differ significantly from that observed in allopatric ponds. Diet analysis indicated that increased resource partitioning occurred when P. fluviatilis and L. gibbosus were reared in sympatry, with P. fluviatilis shifting to a diet higher in microcrustaceans. The results do not support the previous claims of adverse effects of L. gibbosus on P. fluviatilis populations. Under conditions of climate change, however, which have been demonstrated experimentally to enhance L. gibbosus recruitment, this species is expected to become invasive in England, resulting in higher densities that may exert a stronger competitive effect than examined in this study.