396 research outputs found
Contribution to the dragonfly, aquatic beetle and caddisfly fauna of the JĂĄszsĂĄg, Hungary (Odonata, Coleoptera: Hydradephaga and Hydrophiloidea, Trichoptera)
Collecting data of 17 species of
dragonflies and damselflies, 60 species of aquatic beetles and 18 species of caddisflies are given from 17
localities in the JĂĄszsĂĄg region. The occurrence of Hyphydrus anatolicus, Enochrus halophilus and Berosus
geminus are important faunistic results
Faunistical results of the Trichoptera investigations carried out in the frames of the ecological survey of the surface waters of Hungary (ECOSURV) in 2005
In 2005 caddisfly larvae were collected at 317 sites in Hungary. 88 caddisfly species belonging
15 families were identified (3 Rhyacophilidae, 3 Glossosomatidae, 1 Philopotamidae, 11 Hydropsychidae, 9
Polycentropodidae, 3 Psychomyidae, 1 Ecnomidae, 3 Phryganeidae, 1 Brachycentridae, 28 Limnephilidae, 4
Goeridae, 17 Leptoceridae, 1 Sericostomatidae, 1 Beraeidae, 1 Odontoceridae). New larval data for the following
rare species are important faunistical results: Rhyacophila obliterata, Hydropsyche incognita,
Hydropsyche ornatula, Annitella obscurata, Limnephilus fuscicornis, Potamophylax luctuosus, Silo piceus,
Erotesis baltica, Oecetis testacea
A lĂĄpi pĂłc.
A lĂĄpi pĂłc elterjedĂ©s, alaktan, fejlĆdĂ©s, Ă©letmĂłd, ĂĄllomĂĄnyaikat veszĂ©lyeztetĆ tĂ©nyezĆk összefoglalĂĄsa. Ex situ vĂ©delmĂ©nek (szaporĂtĂĄs, nevelĂ©s, telepĂtĂ©s) lehetĆsĂ©gei nagy rĂ©szben sajĂĄt kĂsĂ©rleti adatok, megfigyelĂ©sek alapjĂĄ
Aquatic beetles, aquatic and semiaquatic bugs, dragonfly and caddisfly larvae from 32 backwaters in Upper-Tisza-region, NE Hungary (Coleoptera: Hydradephaga, Hydrophiloidea; Heteroptera: Nepomorpha, Gerromorpha; Odonata; Trichoptera)
Collecting data of 142 taxa of aquatic macroinvertebrates
(92 Coleoptera, 19 Heteroptera, 26 Odonata larvae, 5 Trichoptera larvae) are given from 32 oxbow
lakes of upper Tisza region are given
Effect of large- and small- bodied zooplankton on phytoplankton in a eutrophic oxbow
Macrozooplankton and microzooplankton effects on the phytoplankton were measured in situ in a eutrophic lake. Indigenous phytoplankton were incubated for 5 days in 301 mesocosms with either the macro- and microzooplankton (complete), microzooplankton only (micro) or no zooplankton
(none). Changes in phytoplankton biovolume were investigated. Rotifer densities became significantly
higher in the 'micro' treatment than in the 'complete' and 'none' treatments. Total algal biovolume changed little in the 'complete' and 'none' treatments, but increased significantly in the 'micro' treatment. The results suggest that macrozooplankton (Daphnia magna) suppressed it and
microzooplankton (Keratella cochlearis) enhanced it. They had opposite net effects on the phytoplankton.
Suppression of microzooplankton by Daphnia probably had an indirect negative effect on the phytoplankton
Introduction of computer aided method in education of mechanics at the Faculty of Engineering in University of Szeged
The spread of mass education in Hungary needs new methods in teaching of technical basic subjects. It is necessary because the quality of the education should be maintained in spite of the increase in the number of students. Department of Mechanics and Technical Drawing (Mechanical Engineering Faculty of Szent IstvĂĄn University, Hungary) have developed and applied computer aided method for give out and correction mechanics homework in the full-time and distance education for the last fifteen years. Other Hungarian universities and colleges apply this method. The circle of such applied task types in the program package has been increasing continuously according to demand. First author applied a similar program package previously in Szolnok College. On the basis of experience of mechanics teachers using this method it is recommended to introduce it at the Faculty of Engineering in University of Szeged. In the frame of this paper the authors present the method and the program, moreover they summarize their gained experiences connccted to the applying of the program
A tiszavirĂĄg telepeinek elhelyezkedĂ©se Ă©s szerkezete, valamint ĂĄllomĂĄnyĂĄnak nagysĂĄga a FelsĆ-Tisza egyes szakaszain
A közĂ©pszakasz jellegƱ folyĂłk szakadĂłpartjain megtelepedĆ Ă©lĆvilĂĄg termĂ©szetvĂ©delmi
szempontbĂłl kiemelkedĆen fontos tagja az EurĂłpĂĄban jelentĆsebb mennyisĂ©gben
mĂĄr csak a Tisza vĂzrendszerĂ©ben elĆfordulĂł tiszavirĂĄg (Palingenia longicauda). VizsgĂĄlatunk
célja a Tisza 11 szakaszån talålható tiszaviråg-telepek térbeli elhelyezkedésének felmérése
volt, valamint a tiszavirĂĄg ĂĄllomĂĄnyĂĄnak lĂĄrvĂĄk alapjĂĄn törtĂ©nĆ becslĂ©se volt kvantitatĂv, bĂĄgeres
mintavétel alapjån. Minden vizsgålt szakaszon talåltunk tiszavirågok åltal åsott jåratokat,
valamint tiszavirĂĄglĂĄrvĂĄkat. A lĂĄrvĂĄk fĆleg olyan szakaszokon voltak nagy szĂĄmban, melyeken
a partfal nem volt kikövezve vagy ĂĄtalakĂtva, anyaga törmelĂ©kes, puha illetve kemĂ©ny
agyagos, dĆlĂ©sszöge pedig meredek volt, Ă©s ĂĄllandĂł, viszonylag gyors vĂzĂĄramlĂĄssal rendelkezett.
Ăsszesen 6396 m tiszavirĂĄg ĂĄltal lakott partszakaszt talĂĄltunk, mely az egĂ©sz vizsgĂĄlt
hossz (14 534 m) 44%-ĂĄt tette ki. A nagy egyedsƱrƱsĂ©gƱ âjĂłâ telepek arĂĄnya ezen belĂŒl 11%, a
âközepesâ telepek arĂĄnya 28%, mĂg a kis egyedsƱrƱsĂ©gƱ âgyengeâ telepek arĂĄnya 61% volt. A
lĂĄrvĂĄk denzitĂĄsa a âjĂłâ telepeken 1450â1500 egyed/m2, a âközepesâ telepeken 800â820
egyed/m2, mĂg a gyenge telepeken 420â450 egyed/m2 volt. A 11 szakasz tiszavirĂĄg-ĂĄllomĂĄnya
összesen 40â50 milliĂł egyedre becsĂŒlhetĆ, melynek termĂ©szetvĂ©delmi Ă©rtĂ©kessĂ©ge (eszmei Ă©rtĂ©kkel
szĂĄmolva) minimum 77 milliĂĄrd Ft, maximum 102 milliĂĄrd Ft. A tiszavirĂĄg-ĂĄllomĂĄnyt fenyegetĆ
hatĂĄsok közĂŒl a legfontosabb a partvĂ©delmi cĂ©lĂș kövezĂ©s, mivel ennek sorĂĄn eltƱnnek
azok a szakadĂłpartok, melyeken a tiszavirĂĄg legnagyobb ĂĄllomĂĄnyai Ă©lnek, illetve a partfal alkalmatlannĂĄ
vålik a tiszaviråglårvåk megtelepedésére
Dragonfly assemblages of a shallow lake type reservoir (Tisza-tĂł, Hungary) and its surroundings
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VĂzi makroszkĂłpikus gerinctelenek vizsgĂĄlata a KörösâMaros Nemzeti Park illetĂ©kessĂ©gi terĂŒletĂ©n (Odonata, Coleoptera, Trichoptera)
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