Janus Pannonius Múzeum Évkönyve 43 (1998)( Pécs, 1999)

Természettudományok - Nógrádi, Sára–Uherkovich, Ákos: Studies on the caddisflies (Trichoptera) of the Gemenc Landscape Protection Area (Duna–Dráva National Park), South Hungary

A Janus Pannonius Múzeum Évkönyve 43 (1998) 65-73 Pécs, 1999 Studies on the caddisflies (Trichoptera) of the Gemenc Landscape Protection Area (Duna-Dráva National Park), South Hungary Sára NÓGRÁDI & Ákos UHERKOVICH NÓGRÁDI, S. & Á. UHERKOVICH: Studies on the caddisflies (Trichoptera) of the Gemenc Landscape Protection Area (Duna-Dráva National Park), South Hungary. Abstract. 40 species were listed from the LPA in the years 1983-1985 and 1998. No rarities were collected. Almost all endangered species have already disappeared from the area due to the polluted water and the regulation of water courses. The bulk of the rest of the species are not threatened, they are common all over the country, also in polluted water bodies. Introduction The first results about caddisfly occurrence along the southern section of Hungarian Danube (Duna) were obtained in the years 1983-1985. During these years we collected personally by night capturing near Dunaszekcsó, and we elaborated the caddisflies of a light trap erected in the Gemenc Landscape Protection Area (Őcsény, Gemenc hunting lodge). Neither in the collection of the Hungarian Natural History Museum nor in other collections could we find any specimens collected here before these results (NÓGRÁDI 1989). Our data have not been published in detail but some were analysed in a presentation and a paper (UHERKOVICH, NÓGRÁDI 1997). Along the lower section of River Danube systematic researches were carried out by personal collections and light trapping also in the Beda-Karapancsa Landscape Protection Area (in the years 1990-1992), with these studies resulting 36 caddisfly species during the years (NÓGRÁDI, UHERKOVICH 1992). Survey of the Gemenc Landscape Protection Area in 1983-1985 and 1998 The overwhelming majority of old data came from a light trap. This trap had been set up for the examination of larger moths of the aera (UHERKOVICH 1993), but later we determined the caddisflies from these materials. As the trap was set up close to River Danube (about 30 m away from the river), these data series could draw the actual picture about the caddisfly fauna of the river. These studies were completed by further collections, for example near Dunaszekcsô now belonging to the area of the Duna-Dráva National Park. After a long interruption these examinations were continued in 1998 when we collected several times in the area of the national park and its environs. Altogether further twenty samples were collected during this year; their localities are shown in Figs. 1-2 and Table 1. Unfortunately, many days were unfavourable during this year for field work, because repeated precipitation spoiled many collections. Some further collections were also unsuccessful: no caddisflies were caught due either to the cool weather (autumn) or to the poor (deficient) caddisfly fauna (August, October). Most of the sites were dissappointing because of their reduced caddisfly communities. Only very few species live in the main branch of River Danube, as oppsed to the canals outside the inundation area (and outside the national park area) which have rich aquatic vegetation with a little more diverse fauna. The best result (highest species number) was obtained by a portable light trap at the Szeremle damwatch station, altough no important water bodies can be found in the vicinity. The number of caddisfly species varied between 1-11 in each sample. This is a rather low number, such poor material had not been found anywhere else in Hungary (maybe in Lake Kisbalaton where the water was toxic at places). Material In this chapter all the species are enumerated together with their data (locality, date, number of specimens, collectors). Not all dates are given for the light trap material in Gemenc forest (Ócsény, Gemenc hunting lodge), but the first and ultimate occurrence and the summarized number of specimens. BOTOSANEAU'

s and MALICKY'S (1978) nomenclature and system modified by MALICKY (1983) is applied. The material of the Gemenc light trap can be studied also in Table 3.