Change search
ReferencesLink to record
Permanent link

Direct link
Was Lates Late?: A Null Model for the Nile Perch Boom in Lake Victoria
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences. Wageningen University & Research Center, Netherlands.
Show others and affiliations
2013 (English)In: PLoS ONE, ISSN 1932-6203, Vol. 8, no 10, e76847- p.Article in journal (Refereed) Published
Abstract [en]

Nile perch (Lates niloticus) suddenly invaded Lake Victoria between 1979 and 1987, 25 years after its introduction in the Ugandan side of the lake. Nile perch then replaced the native fish diversity and irreversibly altered the ecosystem and its role to lakeshore societies: it is now a prised export product that supports millions of livelihoods. The delay in the Nile perch boom led to a hunt for triggers of the sudden boom and generated several hypotheses regarding its growth at low abundances - all hypotheses having important implications for the management of Nile perch stocks. We use logistic growth as a parsimonious null model to predict when the Nile perch invasion should have been expected, given its growth rate, initial stock size and introduction year. We find the first exponential growth phase can explain the timing of the perch boom at the scale of Lake Victoria, suggesting that complex mechanisms are not necessary to explain the Nile perch invasion or its timing. However, the boom started in Kenya before Uganda, indicating perhaps that Allee effects act at smaller scales than that of the whole Lake. The Nile perch invasion of other lakes indicates that habitat differences may also have an effect on invasion success. Our results suggest there is probably no single management strategy applicable to the whole lake that would lead to both efficient and sustainable exploitation of its resources.

Place, publisher, year, edition, pages
2013. Vol. 8, no 10, e76847- p.
National Category
Biological Sciences
URN: urn:nbn:se:su:diva-96641DOI: 10.1371/journal.pone.0076847ISI: 000326029300053OAI: diva2:668008


Available from: 2013-11-28 Created: 2013-11-25 Last updated: 2013-11-28Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Downing, Andrea S.
By organisation
Department of Ecology, Environment and Plant Sciences
In the same journal
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: 20 hits
ReferencesLink to record
Permanent link

Direct link