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The paper deals with general outlines of salt marsh and dune vegetation in the Ellenbogen and Listland area on Sylt (Schleswig-Holstein, FRG). The composition of current salt marsh vegetation is considered to ...
A microphytobenthic species composition of a tidal flat in the northern Wadden Sea was analysed regarding cell numbers and biomass (in carbon units). The three sampling sites differed in tidal inundation from ...
TBT (tributyltin)-induced imposex is observed in femaleBuccinum undatum from the arctic region. The fine structure of the male penis epithelium was investigated and the results were compared between specimens fro...
The ultrastructure of the digestive tract of tornaria larva of enteropneusts was investigated. It showed that the digestive tract consists of three parts: esophagus, stomach, and intestine. The esophagus epith...
Four helminth parasites out of 19 species found in the Lübeck Bight, Baltic Sea, were chosen for investigations on the transfer from invertebrate to small-sized fish hosts: larvae of the tapewormsSchistocephalus ...
Six specimens ofLeucon parasiphonatus n. sp. were collected at depths ranging from 15 to 424 m in the vicinity of King George Island (South Shetland Islands, Antarctica) and the south eastern Weddell Sea.Leucon p...
Cyrtograpsus angulatus andChasmagnathus granulata (Grapsidae) are the two dominant decapod crustacean species in the outer parts of Mar Chiquita Lagoon, the southernmost in a series of coastal lagoons that occur...
The purpose of this work is to provide the means of identifying the planktonic larvae of the polychaete species appearing in the plankton around the island of Helgoland (North Sea). During a three-year survey ...
An aerial survey of harbour porpoises,Phocoena phocoena, was conducted in June–July 1992 in the western Baltic (Bay of Kiel, the Great Belt, Little Belt, an area north of Fyn) and a coastal area in the North Sea ...
The spermatozoa ofHomologenus sp.,Latreillopsis sp.,Homolomannia sibogae andParomolopsis boasi confirm characteristics of a distinctive homolid spermatozoon previously established forHomola sp.,Paromola sp. andPa...
The dynomenid spermatozoon, exemplified here byParadynomene tuberculata, resembles the spermatozoa of the Dromiidae, Homolidae and lyreidine raninoids and differs markedly from those of other crabs (the heterotre...
Haplosyllis xeniaecola sp. n. is described. It was collected by W. Kükenthal fromXenia viridis (Octocorallia) at Ternate, Molukken Islands.
During their first year in the Wadden Sea, high proportions of the tidal-flat populations of the tellinid bivalveMacoma balthica (L.) redistribute twice: immediately after their settlement in late spring, the pos...
Large quantities of filamentous green algae (Enteromorpha spp.) have regularly occurred on muddy and sandy tidal flats in Königshafen, on the island of Sylt (North Sea), since 1979 — covering the sediments in thi...
We disagree on the generally accepted elements of the description of the sexual life cycle ofNoctiluca as presented by Zingmark (1970a), namely that (1) the swarmers ofNoctiluca are isogametes, that (2) the zygot...
The human impact in the German Bight, in the form of anthropogenic eutrophication, has been documented by a 30-year time-series measurement near the island of Helgoland. Since 1962, the Biologische Anstalt Hel...
The harpacticoid copepodTisbe holothuriae has been cultivated in the Helgoland laboratory for more than 20 years. The effects of density on the larval development and the female productivity were studied by compa...
The harpacticoid copepodTisbe holothuriae was cultivated at different densities in a running-water system. Dry weight and chemical composition (CHN) of both females and egg-sacs have been determined. Dry weight d...
The sea anemoneHormathia alba (Andres, 1881) is redescribed and definitely established as distinct fromH. coronata. Synonymy, external morphology, anatomy and cnidom are treated in detail. Aspects of its reproduc...
In August 1982, a net of 48 stations with altogether 208 samples was investigated in the eastern German Bight with respect to temperature, salinity, as well as the amount and species composition of the mesozoo...
The temperature requirements for growth and upper temperature tolerance were determined in 16 macroalgal species collected on Disko Island (Greenland). The upper survival temperatures were examined in 1°C step...
Acrochaete wittrockii (Wille) Nielsen is a heteromorphic diplohaplont. The haplophase consists of isomorphic, dioecious filamentous epiphytes on brown algae. Several generations follow each other by triflagellat...
The intertidal seaweed flora of Isipingo Beach, Natal, is described. Isipingo Beach lies on the sub-tropical east coast of southern Africa and is the only east coast locality studied in detail by pioneering bi...
Due to the geographical location and paleobiogeography of the Canary Islands, the seaweed flora contains macroalgae with different distributional patterns. In this contribution, the biogeographical relations o...
Scanning electron microscopy observation was carried out on head morphology, number and construction of teeth, nostril position and the presence of neuromasts of seven species of leptocephali from six families...
The parasite fauna of five goby species (Gobiidae, Teleostei) was investigated in the Baltic Sea during the period 1987 to 1990. 13 parasite species were found in samples from the Lübeck Bight:Bothriocephalus sco...
We investigated the morphology of the central nervous system throughout the larval development ofCarcinus maenas. For that purpose single larvae were reared in the laboratory from hatching through metamorphosis. ...
This ultrastructural study investigates the pathological changes in the penial, the sperm groove and the glandular cushion epithelium in maleLittorina littorea (Mesogastropoda) related to TBT (tributyltin) contam...
The density of the common whelk (Buccinum undatum L.) off Douglas, Isle of Man, was determined by four methods: (1) pot sampling, (2) diving, (3) mark-recapture experiment, and (4) underwater television. Although...
The species lists presented for benthic macroalgae, invertebrate and vertebrate species presented are extracted from recent publications (from 1977 to date). The lists summarize the species composition of the ...
This article is part of a Supplement: Volume 47 Supplement 1
This article is part of a Supplement: Volume 47 Supplement 1
This article is part of a Supplement: Volume 47 Supplement 1
This article is part of a Supplement: Volume 47 Supplement 1
This article is part of a Supplement: Volume 47 Supplement 1
This article is part of a Supplement: Volume 47 Supplement 1
This article is part of a Supplement: Volume 47 Supplement 1
This article is part of a Supplement: Volume 47 Supplement 1
The Erratum to this article has been published in Helgoländer Meeresuntersuchungen 1998 52:Art2
Posterior gills (No. 7 and 8) of shore crabsCarcinus maenas were homogenized and fractionated by means of differential and density gradient centrifugation. Employment of marker enzymes Na-K-ATPase and carbonic an...
Fine structural studies were conducted on the gills of the shore crabCarcinus mediterraneus using scanning electron microscopic techniques. The results obtained show the structural organization of crab gills from...
The present paper deals with ostracods collected in Antarctica during the voyage of R.V. “Meteor” (11/4) in December and January 1989/90 in waters around Elephant Island and west of the Antarctic Peninsula bet...
Five species were studied; four of them were already known from hydrothermal vents on the East Pacific Rise. A new genus and new species,Thermiphione tufari is described. Additional descriptions especially concer...
Using 470 data from the literature the dry weight-specific respiration rates of gelatinous zooplankton (cnidarians, ctenophores and salps) and non-gelatinous zooplankton (mainly crustacea) were converted to ca...
To assess whether long-term faunal changes have occurred on intertidal flats in the Danish Wadden Sea, results of faunal surveys in the Skallingen area during the 1930s, 1940s and 1980s were compared. Since th...
Two littoral macrofaunal invertebrates,Hydrobia ulvae (Prosobranchia) andCorophium volutator (Amphipoda) suffered mass mortality on an intertidal mudflat in the Danish Wadden Sea in May–June 1990. Dissection of c...
Brooding in the octocoralXenia macrospiculata is described. Young planulae ofX. macrospiculata were found in brooding pouches located below the anthocodia among the polyps’ cavities. These cavities are connected ...
During a study of the spatial and temporal patterns of desmosponge (Porifera, Demospongiae) recruitment on rocky and coral reef habitats of Santa Marta, Colombian Caribbean Sea, preliminary attempts were made ...
Between April 3 and September 24, 1991, the concentrations of bacteriophages infecting bacterial strains, isolated in 1990 and during this investigations, were determined in 35 samples of seawater taken at sta...
Not applicable