Ábrahám Levente (szerk.): Válogatott tanulmányok V. - Natura Somogyiensis 17. (Kaposvár, 2010)
KANCSAL, B., SZINETÁR, CS., BOGNÁR, V., & ANGYAL, D.: Adatok a Velencei-tó pókfaunájához (Araneae)
134 NATURA SOMOGYIENSIS there were purposeful collections in the area of Lake Fertő which concerned the reedbeds of Lake Fertő as well ( SZITA et al. 2002). Lake Velence is Hungary's third largest lake. Despite of its size and conservational importance it was hardly ever researched. So far only one monograph has been written about the spider fauna of the lake ( KANCSAL 2005) and there were only a few references in the literature (LOKSA 1969, SZINETÁR & KANCSAL 2007, KANCSAL et al. 2007). Since 2004 we have been carrying out researches at the southern coast of the lake in a waterfront reedbed which belongs to Agárd town. In this paper we report the faunistical results of our collection which was lasted from 2004 to 2009. Material and method Researches were carried out on the southern coast of Lake Velence in the 1.5 ha offshore reedbed of Chernel István Madárvárta (47°11'24"N, 18°35'4"E) which belongs to Agárd town and on a floating reed-island which was situated opposite to the Madárvárta. The main factors for choosing the suitable reed-island were easy approachability, lack of disturbance, similarity in consistence of coastal and island reeds and sufficient representation of floating island reeds. The offsore reedbed collections occurred throughout the year on 2004, 2008 and 2009, the island collection was held during May of 2004. Besides dominant reed (Phragmites australis) species of the offshore-zone plant community were narrowleaf cattail ( Typha angustifolia), hemp agrimony (Eupatorium cannabinum ), hedge bindweed (Calystegia sepium), bittersweet nightshade ( Solanum dulcamara), wild cucumber (Echinocystis lobata), gypsywort (Lycopus europaeus), wild mint (Mentha arvensis). On the floating island the only dominant species was reed. Sampling was carried out partly with traditional pitfall traps and, in watery areas, where other methods could not be used, with special floating traps. Floating traps were consisted of 7 cm diameter cups (like traditional pitfall traps) which were filled with killing-fluid and were sunk into polystyrene plates. Sampling in reedbeds and surrounding drier areas was completed by hand-held suction sampling (D-Vac) and beating from trees and bushes was also used (07.09, 2009). In 2004 we used only standard pitfall traps. Preservative liquid was 50% ethylene-glicol in all the traps. Collected specimens were stored in 70% ethanol. We compiled a collection of the species detected at the research area. Spiders were identified up to species level or sometimes, because of the lack of adult specimens, only to genus or family level. We used the relevant literature for the identification (HEIMER & NENTWIG 1991, LOKSA 1969, 1972, NENTWIG et al. 2003, ROBERTS 1995). Species were named after World Spider Catalog V 10.5 (PLATNICK 2010) nomenclature. Results In the researched area 153 species of 24 spider families were detected which are quasi 20% of the Hungarian spider fauna ( SAMU & SZINETÁR 1999). Considering that collection occurred only in a 2 ha area and almost every time from ground level in nearly homogeneous vegetation, it is a remarkably high number.
