uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Fragmented subfossil Chaoborus mandibles reveal periods of cyprinid presence in lake histories
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Soft X-Ray Physics.
2011 (English)In: Journal of Paleolimnology, ISSN 0921-2728, E-ISSN 1573-0417, Vol. 45, no 1, 101-113 p.Article in journal (Refereed) Published
Abstract [en]

Cyprinid fish have pharyngeal teeth that mash ingested food. Here we show that roach (Rutilus rutilus L.), a common cyprinid in Swedish boreal lakes, often break the mandibles of ingested Chaoborus larvae into smaller fragments. The presence/absence of roach in historic fish communities could therefore possibly be determined from the proportion of fragmented Chaoborus mandibles in lake sediments, which we assessed using the following three approaches. (1) Roach that were fed Chaoborus larvae in laboratory aquaria evacuated a significantly higher fraction of fragmented prey mandibles than perch (Perca fluviatilis L.). (2) Surface sediments from lakes in an acidified region in southwestern Sweden showed significantly higher proportions of fragmented mandibles for lakes containing roach compared to lakes devoid of cyprinid fish. (3) A paleo-study in Lake Lysevatten, into which roach were introduced in the 1880s and were extirpated in the 1960s, showed significantly higher proportions of fragmented mandibles in sediment layers from the roach period. We conclude that mandible fragmentation was related to roach presence, and propose that the proportion of fragmented Chaoborus mandibles in lake sediments may provide important information when historical cyprinid alterations are of interest, as in paleo-studies on acidification, eutrophication, or fish introductions.

Place, publisher, year, edition, pages
2011. Vol. 45, no 1, 101-113 p.
Keyword [en]
Chaoborus, Mandibles, Fragmentation, Cyprinids, Fish community composition, Lead-210 chronology
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-146071DOI: 10.1007/s10933-010-9483-8ISI: 000285931000008OAI: oai:DiVA.org:uu-146071DiVA: diva2:397588
Available from: 2011-02-15 Created: 2011-02-15 Last updated: 2012-03-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text
By organisation
Soft X-Ray Physics
In the same journal
Journal of Paleolimnology
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 244 hits
ReferencesLink to record
Permanent link

Direct link