Janus Pannonius Múzeum Évkönyve 32 (1987) (Pécs, 1988)
Természettudományok - Nógrádi, Sára–Uherkovich, Ákos: The caddisfly fauna of the Gyöngyös streamsystem, South Hungary (Tirchoptera)
THE CADDISFLY FAUNA OF THE GYÖNGYÖS STREAMSYSTEM, SOUTH HUNGARY (TRICHOPTERA) Sára NÓGRÁDI and Ákos UHERKOVICH Abstract. The regular collections near Kisdobsza yielded 5412 specimens of 64 species of wich three proved to be new for the Hungarian fauna: Orthotrichia angustella McL., Hydroptila forcipata Eaton and Adicella syriaca Ulmer. Further 4 species were captured on another part of the stream-system. Some faunistic and ecological remarks are given. Introduction In the forest near Kisdobsza Á. Uherkovich regularly collected Macrolepidoptera material for a decade. During this time he had secured some caddisfly materials, too, and passed them to Dr. S. Újhelyi for determination. The results gave the first records of Trichoptera from this region. The area examined lies in the most southeastern part of the geographical region „Belső-Somogy" (South Hungary), close to the River Drava and the region of Drava Plain. The most important site for capturing of caddisflies (and of moths, too) was in the forest southwest from the village Kisdobsza, south from the main road No. 6. A slow stream belonging to the stream-system of Gyöngyös meanders across this forest. The lenght of this branch (named as the western branch of Gyöngyös) is about 20 km long and it springs at the western margin of Zselic Downs, on the area of the village Hencse (County Somogy). The bed and the running are almost of lowland character. As the annual precipitation is over 700 mm and the summer is not too dry, the stream is abounded is water throughout the year. Between, two villages, Kálmáncsa and Homokszentgyörgy, some artifical fish ponds were dug long ago; such ponds can be found in other branches of the stream-system, too (Fig. l). The bed is either sandy or muddy, at places with depositions of iron carbonate straits. A part of the stream is regulated. The water is moderately polluted by the nearby agricultural areas. After the closing of the collection samples were retained from the water of western branch of Gyöngyös and they were analyzed. The most important results are as follow: Method and material The bulk of the caddisflies was captured by lamp (Tungsram HGLI mercury vapour bulb, 125 or 250 W), powered by a portable Honda generator (type (E300, later EX500). 99 per cent of the material were collected by this very effective method (see Table 1). During the years of 1982-1986 the total caddisfly material coming to light was captured and elaborated. Sometimes we swept along the stream. The result of this method was very moderated, only a few scores of some species were captured this way. The collections near Kisdobsza yielded 5412 specimens (2139 á"cf and 3273 99) beloging to 64 species. In 1986 complementary collections were carried out along the upper branch of the stream, East from Homokszentgyörgy. The bed of this rill is muddy. It is bordered by alder gallery wood and small marshes on the site of forsaken branches of the rill. Here we collected by lamp three times and we could use L. Abraham's material also collected here in 1985. Along the upper branches only 228 specimens of 24 species were found, but four of them {hype reducta Steph., himnephilus extricatus McL., Notidobia ciliar is L., Beraea pullata Curt.) have not been caught around Kisdobsza before. The specimens are deposited in the collections of Natural History Departmi|ht of janus Pannonius Museum, Pécs. The bulk of material is in vials, only some specimens have been pinned. Homokszentgyörgy 14.11.1986 8.2 7.9 620X10"^ 15.9 86 17 10 1.2 6.16 11 36 360 6.71 0.32 0.023 1.5 Dissolved oxygen mg. p. 1. pH Conductivity Total hardness Ca 2 + mg. p. 1. Mg 2 + mg. p. 1. Na+ mg. p. ' 1. K+ mg. p. 1. Total cathions equivalent Cl~ mg. p. 1. SO/, 2- mg. p. 1. HCCV" m S- P- 1Total anions equivalent Ammonium ion NH 4 + mg. p. Nitrite ion N0 2- mg. p. 1. Nitrate ion NO3- mg. p. I. Kisdobsza 14.11.1986 10.2 8.2 675X106 18.9 89 28 13 3 7.4 13 28 409 7.65 0.12 0.052 3.4 A Janus Pannonius Múzeum Evkönyve 32 (1987): 15—24. Pécs, Hungária, 1988.
