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  1. Irradiation with artificial quasi-solar light was used to investigate lethal and sublethal effects of enhanced ultraviolet-B (UV-B) radiation on eggs, larval and juvenile stages of North Sea plaice. The irrad...

    Authors: H.-U. Steeger, J.F. Freitag, S. Michl, M. Wiemer and R.J. Paul
    Citation: Helgoland Marine Research 2014 55:65
    Content type: Original Article Published on:

  2. The underwater light climate of a shallow estuary located at the southern coast of the Baltic Sea has been investigated, with special emphasis on the spectral irradiance composition and on short-term irradian...

    Authors: Hendrik Schubert, Sigrid Sagert and Rodney Malcolm Forster
    Citation: Helgoland Marine Research 2014 55:64
    Content type: Original Article Published on:

  3. Ultraviolet (UV) radiation at four wavelengths (305, 320, 340 and 380 nm) and photosynthetically active radiation (PAR) were measured from May 1994 to October 1999 using Biospherical UV radiometers. A surface...

    Authors: M.J. Dring, A. Wagner, L.A. Franklin, R. Kuhlenkamp and K. Lüning
    Citation: Helgoland Marine Research 2014 55:63
    Content type: Original Article Published on:

  4. Eggs of dab (Limanda limanda) and plaice (Pleuronectes platessa) were experimentally exposed to ultraviolet-B (UV-B) radiation in a solar radiation simulator. The experimental design tried to simulate present an...

    Authors: V. Dethlefsen, H. von Westernhagen, H. Tüg, P.D. Hansen and H. Dizer
    Citation: Helgoland Marine Research 2014 55:62
    Content type: Original Article Published on:

  5. Genetically identical individuals of the white form of Metridium senile were kept in the laboratory for 40 months, during almost 2 years of which they were irradiated with ultraviolet (UV) radiation simulating t...

    Authors: R. Westholt, P. Kestler, O. Sicken and W. Westheide
    Citation: Helgoland Marine Research 2014 55:61
    Content type: Original Article Published on:

  6. At Helgoland, in the North Sea, growth of the high sublittoral brown macroalga Dictyota dichotoma (Hudson) Lamoroux was examined in October (the time of tetraspore release) in an outdoor tank by exposing 2-day-o...

    Authors: R. Kuhlenkamp, L.A. Franklin and K. Lüning
    Citation: Helgoland Marine Research 2014 55:60
    Content type: Original Article Published on:

  7. The European light dosimeter network of over 40 stations has been established in Europe and other continents equipped with three-channel filter dosimeters to measure solar radiation in three channels, UV-B (2...

    Authors: D.-P. Häder, M. Lebert, G. Colombetti and F. Figueroa
    Citation: Helgoland Marine Research 2014 55:59
    Content type: Original Article Published on:

  8. This paper describes the results of pelagic mesocosm experiments designed to test the effects of enhanced and reduced ultraviolet radiation (UV) on the planktonic community of a Baltic Sea estuary. The Darss-...

    Authors: R.M. Forster and H. Schubert
    Citation: Helgoland Marine Research 2014 55:58
    Content type: Original Article Published on:

  10. Larvae of cnidarians need an external cue for metamorphosis to start. The larvae of various hydrozoa, in particular of Hydractinia echinata, respond to Cs+, Li+, NH4 + and seawater in which the c...

    Authors: Barbara Siefker, Michael Kroiher and Stefan Berking
    Citation: Helgoland Marine Research 2000 54:53
    Content type: Original Article Published on:

  11. The parasitic Plasmodiophoromycetes Phagomyxa bellerocheae sp. nov. and P. odontellae sp. nov. have been found in the North Frisian Wadden Sea; North Sea, feeding on the centric diatoms Bellerochea malleus and O...

    Authors: E. Schnepf, S.F. Kühn and S. Bulman
    Citation: Helgoland Marine Research 2000 54:56
    Content type: Original Article Published on:

  16. The Dutch Wadden Sea has been changed dramatically over the last centuries by human activities like land reclamation and different forms of fishery. This has, amongst other things, led to changes in the number...

    Authors: V.N. de Jonge, D.J. de Jong and M.M. van Katwijk
    Citation: Helgoland Marine Research 2000 54:00540151.10152
    Content type: Original Article Published on:

  17. Material exchange, biodiversity and trophic transfer within the food web were investigated in two different types of intertidal seagrass beds: a sheltered, dense Zostera marina bed and a more exposed, sparse Z. n...

    Authors: H. Asmus and R. Asmus
    Citation: Helgoland Marine Research 2000 54:00540137.10152
    Content type: Original Article Published on:

  18. Loss of saltmarsh vegetation in south-east England is a significant problem for conservation and coastal defence. The losses of vegetation began in the 1930s with the loss of intertidal Zostera marina and have co...

    Authors: R. G. Hughes, D. Lloyd, L. Ball and D. Emson
    Citation: Helgoland Marine Research 2000 54:00540129.10152
    Content type: Original Article Published on:

  19. A conceptual model is proposed, describing potential Zostera marina habitats in the Wadden Sea, based on reported data from laboratory, mesocosm and field studies. Controlling factors in the model are dynamics, d...

    Authors: M.M. van Katwijk, D. C. R. Hermus, D.J. de Jong, R. M. Asmus and V.N. de Jonge
    Citation: Helgoland Marine Research 2000 54:00540117.10152
    Content type: Original Article Published on:

  20. Increasing concerns over global warming and expected sea level rises have led to the adoption of new coastal management strategies around the south-east coast of England. This paper explores the role played by...

    Authors: M. Emmerson
    Citation: Helgoland Marine Research 2000 54:00540110.10152
    Content type: Original Article Published on:

  22. In the German Wadden Sea there has been a remarkable decline in seagrass beds. It was the aim of this study to test whether herbicide contamination could be a reason for this. Concentrations of triazine herbic...

    Authors: K. Bester
    Citation: Helgoland Marine Research 2000 54:00540095.10152
    Content type: Original Article Published on:

  24. The morphological and physiological differences between two morphotypes of Z. noltii Hornem. were studied in the intertidal meadows on the south-western Iberian Peninsula (Palmones river estuary and Ria Formosa)....

    Authors: G. Peralta, J. L. Pérez-Lloréns, I. Hernández, F. Brun, J. J. Vergara, A. Bartual, J. A. Gálvez and C. M. García
    Citation: Helgoland Marine Research 2000 54:00540080.10152
    Content type: Original Article Published on:

  29. Chondrus crispus and Mastocarpus stellatus both inhabit the intertidal and upper sublittoral zone of Helgoland, but with C. crispus generally taking a lower position. Measurements of chlorophyll fluorescence, ac...

    Authors: K. Bischof, G. Kräbs, D. Hanelt and C. Wiencke
    Citation: Helgoland Marine Research 2000 54:00540047.10152
    Content type: Original Article Published on:

  31. A new species of Arenopontia (Neoleptastacus) is described on the basis of a single female collected from one sandy beach in Montenegro, Adriatic Sea. With the addition of the new species, the subgenus Neoleptast...

    Authors: T. Karanovic
    Citation: Helgoland Marine Research 2000 54:00540033.10152
    Content type: Original Article Published on:

  32. Cryothecomonas longipes Schnepf and Kühn sp. nov. is a colourless biflagellate organism, 9–14 µm long and 7–9 µm wide when not filled with food vacuoles. It was detected in the North Sea, feeding with pseudopodi...

    Authors: E. Schnepf and S. F. Kühn
    Citation: Helgoland Marine Research 2000 54:00540018.10152
    Content type: Original Article Published on:

  33. The higher taxonomic structure of a meiofaunal community was investigated in an Eastern Mediterranean lagoon (Gialova lagoon, Ionian Sea). Seven stations were sampled on a seasonal basis during 1995–1996. Stat...

    Authors: V. E. McArthur, D. Koutsoubas, N. Lampadariou and C. Dounas
    Citation: Helgoland Marine Research 2000 54:00540007.10152
    Content type: Original Article Published on:

  35. A comprehensive database, containing biological and chemical information, collected in the framework of the bilateral interdisciplinary MARS project (”biological indicators of natural and man-made changes in m...

    Authors: S. R. Schmolke, K. Broeg, S. Zander, V. Bissinger, P. D. Hansen, N. Kress, B. Herut, E. Jantzen, G. Krüner, A. Sturm, W. Körting and H. von Westernhagen
    Citation: Helgoland Marine Research 1999 53:90530257.10152
    Content type: Original Article Published on:

  37. Ethoxyresorufin O-deethylase (EROD) activity was measured in the liver of dab (Limanda limanda) and flounder (Platichthys flesus) from the German Bight (southern North Sea) and compared with muscle and liver pol...

    Authors: H. v. Westernhagen, G. Krüner and K. Broeg
    Citation: Helgoland Marine Research 1999 53:90530244.10152
    Content type: Original Article Published on:

  38. The intensive development of industry and urban structures along the seashores of the world, as well as the immense increase in marine transportation and other activities, has resulted in the deposition of tho...

    Authors: Vladimir Bresler, Vera Bissinger, Avigdor Abelson, Halim Dizer, Armin Sturm, Renate Kratke, Lev Fishelson and Peter-Diedrich Hansen
    Citation: Helgoland Marine Research 1999 53:90530219.10152
    Content type: Original Article Published on:

  39. In this study we examined the activity of catalase in the water column (mainly attributed to planktonic microorganisms) and the activity of catalase and superoxide dismutase (SOD), as well as lipid peroxidatio...

    Authors: D. L. Angel, U. Fiedler, N. Eden, N. Kress, D. Adelung and B. Herut
    Citation: Helgoland Marine Research 1999 53:90530209.10152
    Content type: Original Article Published on:

  40. The complex interactions between parasites, hosts and the environment are influenced by the stability of the ecosystem. Heteroxenous parasites, with complex, multiple-host life cycles, can persist only in habi...

    Authors: A. Diamant, A. Banet, I. Paperna, H. v. Westernhagen, K. Broeg, G. Kruener, W. Koerting and S. Zander
    Citation: Helgoland Marine Research 1999 53:90530195.10152
    Content type: Original Article Published on:

  41.   An integrated biological effect monitoring concept has been tested in flounder (Platichthys flesus L.) from four locations with different anthropogenic impact in the German Bight. During 3 years of sampling, b...

    Authors: K. Broeg, S. Zander, A. Diamant, W. Körting, G. Krüner, I. Paperna and H. v. Westernhagen
    Citation: Helgoland Marine Research 1999 53:90530171.10152
    Content type: Original Article Published on:

  42. The bioaccumulation of Hg, Cd, Zn, Cu, Mn and Fe was evaluated in the muscle and liver tissue of four fish species (Siganus rivulatus, Diplodus sargus, Lithognatus mormyrus and Plathychtis flesus) from clean and...

    Authors: Nurit Kress, Barak Herut, Edna Shefer and Hava Hornung
    Citation: Helgoland Marine Research 1999 53:90530163.10152
    Content type: Original Article Published on:

  43. The trace element contamination levels in mollusks were evaluated for different marine coastal sites in the Mediterranean (Israeli coast), Red (Israeli coast) and North (German coast) Seas. Three bivalve speci...

    Authors: Barak Herut, Nurit Kress, Edna Shefer and Hava Hornung
    Citation: Helgoland Marine Research 1999 53:90530154.10152
    Content type: Original Article Published on:

  48. One reason for the paucity of knowledge of dolphin social structure is the difficulty of measuring individual dolphins. In Hector’s dolphins, Cephalorhynchus hectori, total body length is a function of age, and s...

    Authors: S. Bräger, A. Chong, S. Dawson, E. Slooten and B. Würsig
    Citation: Helgoland Marine Research 1999 53:90530122.10152
    Content type: Original Article Published on:

  49.  Hydractinia echinata and Aurelia aurita produce motile larvae which undergo metamorphosis to sessile polyps when induced by external cues. The polyps are found at restricted sites, A. aurita predominantly on roc...

    Authors: M. Kroiher and S. Berking
    Citation: Helgoland Marine Research 1999 53:90530118.10152
    Content type: Original Article Published on:
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Helgoland Marine Research

ISSN: 1438-3888

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