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During the German Eel Expedition in Spring 1979, the horizontal and vertical distribution of the invertebrate plankton was studied in the epipelagic zone of the western central Sargasso Sea, based on 55 µm and...
The extent to which pelagic fishes occurring in the Sargasso Sea and adjacent parts of the Atlantic prey on leptocephali (Anguilliformes) was investigated. Most of the fishes examined (c. 95%) were collected u...
During the research program on the biology and migration ofAnguilla spp. carried out with F.R.V. “Anton Dohrn” in 1979, approximately 1300 adolescent and adult anguilliform individuals were caught covering 8 fami...
Abundance, size and depth distributions of American eel(Anguilla rostrata) leptocephali collected in four transects across the Florida Current between the Straits of Florida and Cape Hatteras, North Carolina, wer...
Both Atlantic eel species (Anguilla anguilla andA. rostrata) were collected in the Sargasso Sea during the 1979 cruise of the F. R. V. “Anton Dohrn” and R. V. “Friedrich Heincke”. A total of 3,097 0-group larvae ...
The sagittal otoliths of seven anguilliform species belonging to the families Nemichthyidae, Serrivomeridae and Eurypharyngidae are described and illustrated, and a key for their identification is provided. Al...
Marked differences between continental samples of American and European eels have been detected electrophoretically in allele frequencies at the MDH-2 locus. Starch gel electrophoresis carried out on board F. ...
More than 2000 0-group larvae (5.0–30.0 mm long) of both AtlanticAnguilla species were examined taxonomically. With regard to the total number of myomeres inA. rostrata andA. anguilla, an average difference betwe...
The background and aims of the Sargasso Sea Expedition for exploring the reproduction of the eel (Anguilla spp.) in the North Atlantic are described. The ships used for the investigations in the Sargasso Sea and ...
Quantitative analysis of phytoplankton, organic detritus and dissolved organic carbon was carried out, during the spring bloom, in a specific North Sea area (58° 55′ N, O° 32′ E) in the course of an internatio...
From May 1979 on, the following parameters were measured at a station in the inlet of Königshafen near List (Island of Sylt): temperature, salinity, mesozooplankton (>76 µm), chlorophyll-a, seston dry weight, ...
Atlantic cod bearing pseudobranchial tumours were investigated from both North Sea and Baltic Sea areas. Light and electron microscopic studies revealed a tumorous structure previously described in cod from At...
Members of the shrimp speciesLysmata seticaudata were observed to clean a morrey eel in the western Mediterranean Sea (Baleares, Spain). In contrast to the cleaning symbiosis of tropical shrimps, severalLysmata s...
Filtration rate(F) and ingestion rate(I) were measured in the rotiferBrachionus plicatilis feeding on the flagellateDunaliella spec. and on yeast cells(Saccharomyces cerevisiae). 60-min experiments in rotating bo...
Experimentally determined lethal temperatures and temperatures limiting growth or reproduction in the life histories of 15 benthic algal species were used to infer possible phytogeographic boundaries in the No...
Seasonal changes in vegetation patterns and biomass of benthic algae were recorded over a 14-month period in the rocky eulittoral of the North Sea island of Helgoland. The area is characterized by the dominanc...
The original article was published in Helgoländer Meeresuntersuchungen 1982 35:Art8
The original article was published in Helgoländer Meeresuntersuchungen 1982 35:Art4
Ophryotrocha geryonicola was first described by Esmark (1874) asEteonopsis geryonicola. Bidenkap (1895) gave another short description. The species was redescribed by Wesenberg-Lund (1938) asOphryotrocha geryoni...
Migration of cnidoblasts has never been observed in Anthozoa. In contrast to hydrozoans, anthozoans are repeatedly reported to develop nematocysts locally without migration in the entoderm as well as in the ec...
Two components, a basal cuticle and an epicuticle, make up the cuticle ofA. mucosa. The basal cuticle consists of collagen fibrils, which are arranged in about 20 layers. The orientation of the fibrils changes re...
ACarcinus maenas population inhabiting the Schlei, a glacial fjord of the Baltic Sea, was studied during a three-year period of at least monthly sampling. Due to slightly higher water temperatures in the Schlei (...
The fish fauna of an eulittoral mud flat was investigated at Sylt Island (North Sea) with special regard to its food uptake. During the course of a year the following species were caught:Pomatoschistus microps, A...
38 halacarid species from the coasts of the boreal West Atlantic Ocean have been recorded. In a wide-spread net of stations, samples were taken from different substrata in marine and brackish waters in order t...
Juvenile flounder and common mussel from the Baltic Sea were kept in Corexit 7664 (50 µg/l) and cadmium (5 µg/l)-contaminated, recirculated, sea-water systems for 200 days at 15 °C and 20 ‰ S. Accumulation of ...
Wild and cultured material ofDonkinia recta (Donk.) Grun. has been examined using light microscopy, and both the structure of the living cell and its vegetative cell division are described. Unlike most naviculoid...
From observations carried out in the intertidal sands of the Island of Sylt (North Sea),Prostomatella arenicola Friedrich is a typical inhabitant of this Wadden Sea area. Its morphological characters are redescri...
Based on electron microscopic observations, the structure of the solenocytes ofA. mucosa is described. The tube of the solenocyte is made up of 14–15 rods. These rods, which are filled with regularly packed filam...
The ultrastructural differentiation of capsule and its relation to tube development is described in several Octocorallia species(Alcyonaria: Alcyonium digitatum, Parerythropodium coralloides, Cornularia cornucopi...
Sexuality and reproductive behaviour ofCereus pedunculatus (Pennant) and several forms (subspecies) ofActinia equina (L.) from populations collected along the French Atlantic Sea coast and in different habitats a...
Energy dispersive X-ray analysis of elements with Z>11 in a SEM (scanning electron microscope) was used to investigate the elytra ofLagisca extenuata, Lepidonotus clava, andHarmothoe areolata from Naples (Italy) ...
The macrofauna of a dumping area in the eastern part of the German Bight (North Sea) was investigated in July, August and November, 1978 at five stations situated on a transect including central and peripheral...
On the tidal flats of the island of Sylt (eastern part of the North Sea) the quantity of micro- and meiofauna associated with shoots of seagrass(Zostera noltii), with infaunal bivalves(Macoma balthica), and with ...
Calorific and carbon values were determined for a variety of marine and freshwater Protozoa (Noctiluca miliaris, Euplotes sp.,Eufolliculina sp. respectivelyTetrahymena pyriformis, Paramecium caudatum), their food...
By utilizing the techniques for electrophoretic separation of proteins by vertical starch gels, the biochemical systematics of 10 Gammaridae species obtained from marine, brackish and freshwater habitats was s...
Phage-host cross-reaction tests were performed with 774 bacterial strains and 298 bacteriophages. The bacteria (bacteriophages) were isolated at different times from water samples collected in the Atlantic Oce...
The vesicular thallus ofHalicystis is generally embedded in crusts of coralline algae by a rhizoidal part. Only in former unsuccessful attempts to elucidate the development ofHalicystis has this fact been regarde...
The ultrastructure of the flagellar apparatus in the biflagellate female gametes of the green algaBryopsis lyngbyei has been studied in detail. In the flagellum and basal body, microtubule septations occur in som...
Previous descriptions of the ecology and zonation of Aqaba reefs (Mergner & Schuhmacher, 1974) are supplemented by this quantitative study of a test quadrat (5×5 m in size), randomly chosen in some 10 m depth ...
Diurodrilus subterraneus Remane, is a typical inhabitant of the zone of temporarily damp sand on the middle and upper beach slope. The organization of the species as observed in the intertidal sands of the Islan...
During FLEX '76 (Fladen Ground Experiment), the vertical distribution of faecal pellets was studied at a time station on the Fladen Ground (North Sea). Generally, the faecal pellets showed a clearly-defined ma...
The influence of starvation on larval development of the spider crabHyas araneus (L.) was studied in laboratory experiments. No larval stage suffering from continual lack of food had sufficient energy reserves to...
During 1978, 22 fish species (in particularAnguilla anguilla L.,Platichthys flesus L.,Osmerus eperlanus L.,Gasterosteus aculeatus L.,Lampetra fluviatilis L.,Alosa fallax [Lacepede],Gymnocephalus cernua L.,Clupea ...
Condition factors (CF = mg · mm−3 · 100) of Pacific herring larvae from Departure Bay, Canada, were determined from two larval year classes and compared for yolk sac and post-yolk sac feeding larvae. Decline in c...
A new type of compression chamber for microscopic studies of living microorganisms is described. This broadly applicable instrument allows controlled slowing down, turning and compression of vagile organisms. ...
Yellow eels(Anguilla anguilla) taken during summer from random commercial trapnet samples in the littoral area of Helgoland (n=116) and from a freshwater area of the River Elbe near Hamburg (n=109) were examined ...
The shell-inhabiting, marine algaOstreobium quekettii Bornet & Flahault is a distinct species reproducing by zoospores with four flagella. Sporangium formation and the development of zoospores are described. The ...
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