Journal
JOURNAL OF FISH BIOLOGY
Volume 74, Issue 9, Pages 2115-2131Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1095-8649.2009.02289.x
Keywords
fish; lakes; predation; prey; stable isotopes
Categories
Funding
- German Research Council [ME 1681/4-2]
- Danish Ministry of Food, Agriculture and Fisheries
- Ministry of Food, Agriculture and Fisheries, Directorate of Fisheries
Ask authors/readers for more resources
The feeding habits of the European eel Anguilla anguilla (> 300 mm total length, L-T) were compared in two lakes of different environmental state: Lake Gro ss er Vatersee (LGV), Germany (clear water, mesotrophic and submerged macrophytes), and Lake Vallum (LV), Denmark (turbid, eutrophic and no submerged macrophytes). The density of macrozoobenthos was higher in LV (3500 individuals m(-2)) than in LGV (1500 individuals m(-2)). The abundance of small prey fishes (40-99 mm L-T) was highest in LV. In LV, A. anguilla fed on macrozoobenthos, in particular, chironomid larvae. In LGV, A. anguilla used fishes as the main food component. Stable isotope analyses confirmed the stomach contents dietary results. The estimated mean +/- s.d. trophic positions of A. anguilla in LGV (3.7 +/- 0.2) was one level higher than those of fish in LV (2.7 +/- 0.2). Based on these results, it is concluded that piscivory among A. anguilla was generally controlled by the density of macrozoobenthos. Stable isotope analysis further indicated that A. anguilla may act as integrators between benthic and pelagic food webs when density of insect larvae is low.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available