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Journal Molluscan Studies Advance Access originally published online on April 22, 2008
Journal of Molluscan Studies 2008 74(3):293-297; doi:10.1093/mollus/eyn012
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© The Author 2008. Published by Oxford University Press on behalf of The Malacological Society of London, all rights reserved

A new method for marking slugs by ultraviolet-fluorescent dye

Pavel Foltan1,2 and Martin Konvicka1,3

1Faculty of Biological Sciences, University of South Bohemia, Branisovska 31, CZ-37005 Ceske Budejovice, Czech Republic; 2I2L research Ltd, Capital Business Park, Wentloog, Cardiff CF3 2PX, UK; and 3 Institute of Entomology, Czech Academy of Sciences, Branisovska 31, CZ-37005 Ceske Budejovice, Czech Republic

Correspondence: P. Foltan; e-mail: pavel_foltan{at}yahoo.co.uk


  Abstract

We introduce a new, cheap, fast and reliable method for marking slugs, using biologically inert UV-fluorescent dye. The dye remained visible for more than 3 months in all individuals marked. Use of the dye did not affect survival, spatial behaviour or daily activity of the slugs, nor the prey choice of the predatory beetle Pterostichus melanarius, under controlled semi-natural conditions. The new method will enable further investigations of absolute slug densities, diurnal activity, mobility and dispersal, using capture-recapture techniques. The resulting data would allow the construction of more exact forecasting models for the population dynamics of pest slugs, potentially leading to a reduction in the use of control agents, particularly chemical molluscicides.

(Received 20 June 2007; accepted 24 November 2007)


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