Janus Pannonius Múzeum Évkönyve 28 (1983) (Pécs, 1984)

Természettudományok - U. Nógrádi, Sára: The caddisfly fauna of the Valley Nagy-mély-völgy, Mecsek Mountains, Hungary (Trichoptera)

THE CADDISFLY FAUNA OF NAGY-MÉLY-VÖLGY 17 Methods and material up at the back of the lamp lighting the valley round about. The accessories were set in the brook-side at Earlier the caddisflies were collected mostly by every collection and capturings started at sunset and netting. This is not an effectual method, because an lasted for 1 1/2-3 hours. The collections lasted for area has to be gone through several times for col- such a short time because of the very sudden coollecting of sufficient material for evaluation. Nowa- ing down (Fig. 3). days this one can be used as an addidional method: In 1981 Ákos Uherkovich collected here to exafor some species netting is the most frequent or mine qualitative and quantitative compositions of only way of catching. the larger moth community of these forest stands. The night light capturing used by lepidopterolo- but he preserved a part of the caddisflies, too. I gits for ages is a very suitable method for examin- express my thanks for him in this way, too. Uhering the qualitative and quantitative conditions of kovich's caddisfly material contains 149 specimens Trichoptera. All of our collections were made by a of 23 species. His very first data derived from a 250-Watt mercury vapour bulb and its power was netting of 1977, in Valley „Petnyáki-völgy". produced by a portable generating set E300 type of I joined the research at the beginning of 1982. „Honda" make. This type of bulbs is very advanta- From early spring till late autumn 22 collections geous, because it radiates substantial short-waved were made. Caddisflies were not caught three times and ultraviolet rays of 300 ... 400 nm (Heath 1970), (in March and April). The 19 successful collections therefore it gives good results in moonlight, too. A yielded 616 specimens of 29 species, as follows (see large sheet of 9 sq. m. (about 100 sq. feet) was set the Fig. 3, too) : Fig. 3. The graph of specimens (a) and species (b) during the year 1982. 3. ábra. A példány- (a) és lajszámok (b) változása az 1982. év folyamán.