Access the full text.
Sign up today, get DeepDyve free for 14 days.
Maitland Maitland, East East (1989)
An increase in the numbers of ruffe, Gymnocephalus cernua (L.), in a Scottish loch from 1982 to 1987Aquaculture and Fisheries Management, 20
Shafi Shafi, Maitland Maitland (1971)
Comparative aspects of the biology of pike Esox lucius L. in two Scottish lochsProceedings of the Royal Society of Edinburgh (B), 71
R. Welcomme (1986)
International Measures for the Control of Introductions of Aquatic OrganismsFisheries, 11
Adams Adams, Brown Brown, Tippett Tippett (1990)
Dace ( Leuciscus leuciscus (L.)) and chub ( Leuciscus cephalus (L.)): New introductions to the Loch Lomond catchmentGlasgow Naturalist, 21
Adams Adams, Tippett Tippett (1991)
Powan ova ( Coregonous lavaretus (L.)) predation by newly introduced ruffe ( Gymnocephalus cernua (L.)) in Loch Lomond, ScotlandAquaculture and Fisheries Management, 22
R. Mann (1982)
The Annual Food Consumption and Prey Preferences of Pike (Esox lucius) in the River Frome, DorsetJournal of Animal Ecology, 51
Rapid and dramatic change in the fish community of Loch Lomond has resulted from a series of fish introductions in recent years. A comparison of the diet of pike, Esox lucius L., in 1989–1990 with data from 1955–1967, prior to recent introductions, demonstrates a shift in prey choice. In 1955–1967 powan, Coregonus lavaretus (L.), dominated in the diet (57% of prey by number) by 1989–1990 the introduced ruffe, Gymnocephalus cernuus (L.), was the commonest prey species (44% by number). This shift in pike predation to an abundant population of introduced ruffe has consequences for native species. Assuming that the pike population has not increased in response to increased food availability due to the introduction of ruffe, pike predation pressure on native species will be relieved. This is likely to have the greatest effect on powan. Comparison of the predation rate in 1955–1967 with 1989–1990 supports the hypothesis that the rate of predation on powan has declined, although the effect that this may have on the powan population is unclear, as the role of predation in the regulation of population size is unknown for this species.
Journal of Fish Biology – Wiley
Published: May 1, 1991
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.