396 research outputs found

    Contribution to the dragonfly, aquatic beetle and caddisfly fauna of the JĂĄszsĂĄg, Hungary (Odonata, Coleoptera: Hydradephaga and Hydrophiloidea, Trichoptera)

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    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

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    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.

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    A lĂĄpi pĂłc elterjedĂ©s, alaktan, fejlƑdĂ©s, Ă©letmĂłd, ĂĄllomĂĄnyaikat veszĂ©lyeztetƑ tĂ©nyezƑk összefoglalĂĄsa. Ex situ vĂ©delmĂ©nek (szaporĂ­tĂĄs, nevelĂ©s, telepĂ­tĂ©s) lehetƑsĂ©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)

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    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

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    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

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    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 FelsƑ-Tisza egyes szakaszain

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    A közĂ©pszakasz jellegƱ folyĂłk szakadĂłpartjain megtelepedƑ Ă©lƑvilĂĄg termĂ©szetvĂ©delmi szempontbĂłl kiemelkedƑen fontos tagja az EurĂłpĂĄban jelentƑsebb mennyisĂ©gben mĂĄr csak a Tisza vĂ­zrendszerĂ©ben elƑfordulĂł tiszavirĂĄg (Palingenia longicauda). VizsgĂĄlatunk cĂ©lja a Tisza 11 szakaszĂĄn talĂĄlhatĂł tiszavirĂĄg-telepek tĂ©rbeli elhelyezkedĂ©sĂ©nek felmĂ©rĂ©se volt, valamint a tiszavirĂĄg ĂĄllomĂĄnyĂĄnak lĂĄrvĂĄk alapjĂĄn törtĂ©nƑ becslĂ©se volt kvantitatĂ­v, bĂĄgeres mintavĂ©tel alapjĂĄn. Minden vizsgĂĄlt szakaszon talĂĄltunk tiszavirĂĄgok ĂĄltal ĂĄsott jĂĄratokat, valamint tiszavirĂĄglĂĄrvĂĄkat. A lĂĄrvĂĄk fƑleg olyan szakaszokon voltak nagy szĂĄmban, melyeken a partfal nem volt kikövezve vagy ĂĄtalakĂ­tva, anyaga törmelĂ©kes, puha illetve kemĂ©ny agyagos, dƑlĂ©sszöge pedig meredek volt, Ă©s ĂĄllandĂł, viszonylag gyors vĂ­zĂĄramlĂĄssal rendelkezett. Összesen 6396 m tiszavirĂĄg ĂĄltal lakott partszakaszt talĂĄltunk, mely az egĂ©sz vizsgĂĄlt hossz (14 534 m) 44%-ĂĄt tette ki. A nagy egyedsƱrƱsĂ©gƱ „jó” telepek arĂĄnya ezen belĂŒl 11%, a „közepes” telepek arĂĄnya 28%, mĂ­g a kis egyedsƱrƱsĂ©gƱ „gyenge” telepek arĂĄnya 61% volt. A lĂĄrvĂĄk denzitĂĄsa a „jó” telepeken 1450–1500 egyed/m2, a „közepes” telepeken 800–820 egyed/m2, mĂ­g a gyenge telepeken 420–450 egyed/m2 volt. A 11 szakasz tiszavirĂĄg-ĂĄllomĂĄnya összesen 40–50 milliĂł egyedre becsĂŒlhetƑ, melynek termĂ©szetvĂ©delmi Ă©rtĂ©kessĂ©ge (eszmei Ă©rtĂ©kkel szĂĄmolva) minimum 77 milliĂĄrd Ft, maximum 102 milliĂĄrd Ft. A tiszavirĂĄg-ĂĄllomĂĄnyt fenyegetƑ 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 vĂĄlik a tiszavirĂĄglĂĄrvĂĄk megtelepedĂ©sĂ©re
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