Life cycle and population density of the pest slug Arion lusitanicus Mabille (Mollusca : Pulmonata) on grassland

Authors
Citation
B. Grimm, Life cycle and population density of the pest slug Arion lusitanicus Mabille (Mollusca : Pulmonata) on grassland, MALACOLOGIA, 43(1-2), 2001, pp. 25-32
Citations number
47
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences
Journal title
MALACOLOGIA
ISSN journal
0076-2997 → ACNP
Volume
43
Issue
1-2
Year of publication
2001
Pages
25 - 32
Database
ISI
SICI code
0076-2997(2001)43:1-2<25:LCAPDO>2.0.ZU;2-7
Abstract
Arion lusitanicus is a univoltine, semelparous slug found in Austria. Hatch lings were found both during the autumn, in which the eggs were laid, and i n the following spring. By far the largest part of this generation matured the following summer (June to August), with peaks of egg-deposition noted i n late August and early September. Population density was measued by MRR (m ark-release- recapture) and hand-searching; the results obtained by the two methods did not differ significantly. In June 1996 (the peak month for 199 6), MRR gave a density of 1.6 slugs m(-2) on grassland. The high recapture rates of individually marked slugs, as well as the fact that their life par ameters fell well within the range of unmarked individuals, is a proof of t heir unaltered vitality and thus of the applicability of the new method in the field, The effects of different weather conditions on the main life-par ameters are discussed.