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 Eighteen species of gastropods were encountered living near and within the large coastal swamps, mangrove forests, intertidal flats and the rocky shore of the Cameroonian coast of the Atlantic Ocean. These re...
  Misophrioid copepods are reported for the first time from Antarctic waters. A species of each of the genera Misophriopsis and Misophriella is described from hyperbenthic layers of the continental shelf of the e...
In the mud- and sandflat region of the outer Königshafen off List on Sylt, the effects of the outflow from a sewage treatment plant on the benthic diatom flora were investigated. The spectrum of shapes, bioma...
 The euphausiid, Meganyctiphanes norvegica (M. Sars), has an extremely wide distribution around the North Atlantic, from Canada to the Arctic to the western Mediterranean. It appears to be adaptable to life unde...
Spermatogenesis in the mussel Perna viridis was studied by electron microscopy. Results demonstrated that cytological development in spermatogonia and spermatocytes was similar to that previously described in ot...
In a sandy bay with mussel beds in the Wadden Sea (Island of Sylt, eastern North Sea), periwinkles Littorina littorea (L.) were often strongly overgrown with the barnacle Balanus crenatus Bruguière in the lower ...
Patchy distribution is frequently observed in benthic marine invertebrates. In order to indentify factors causing spatial patterns in the bivalve Mya arenaria, abundances of juveniles and adults, as well as deat...
 In 1963 a deep crater was formed about 65 m below sea level in the western part of the German Bight, due to a gas eruption caused by drilling carried out from the platform ’Mr. Louie’. The study area is situat....
 In a first synoptic evaluation, the temporal and spatial distribution of bacterioplankton and chlorophyll-a were determined in the German Wadden Sea. Three surveys were undertaken in winter, spring, and summe...
 Tidal variation of biological parameters was studied at three anchor stations in selected inlet channels of the northern German Wadden Sea in May and July 1994. Concentrations of bacteria, chlorophyll a and su....
 The analysis of population systems is carried out on the basis of the spatial and functional classification of populations developed by V.N. Beklemishev. The population system is a functional part of a particu....
The Gammaridea fauna of Algeciras Bay, located on the Mediterranean side of the Strait of Gibraltar, was studied with regard to the species composition, distribution and ecology. Of the 116 species identified,...
The numbers of exotic species introduced into brackish waters (5–20 psu) and high-salinity waters (> 20 psu) in the Netherlands are hypothesized to reflect species richness in such waters elsewhere in the worl...
Since its first occurrence at Plymouth, southern England, in 1952 the East Asiatic ascidianStyela clava has spread to many localities along the coasts of the south and west British Isles, Ireland, northern France...
The metabolic responses ofMarenzelleria cf.wireni, a newly established polychaete worm within North Sea estuaries, to various kinds of environmental stress are summarised. With respect to salinity,M. cf.wireni is...
The North American spionid polychaeteMarenzelleria cf.wireni was first recorded in the North Sea by Scotland in 1982.Marenzelleria cf.viridis was first found in the Baltic Sea in 1985. Tentative routes of dispers...
The Asian decapodHemigrapsus penicillatus (de Haan, 1835) was first recorded in European waters in 1994. The first specimens were collected in the estuary of Charente Maritime on the west coast of France close to...
In 1988 a long-term study was started of the isopod fauna associated with surface drift material off Helgoland (German Bight, North Sea). In the summer of 1994 specimens ofIdotea metallica Bosc were recorded for ...
Comparison of data from the literature has provided evidence that eurythermal and euryhaline adaptation of larvae and adults in combination with a long seasonal breeding period, high fecundity and short genera...
The intertidal periwinkleLittorina saxatilis completely lacks larval dispersal and adult vagility is low. Although this suggests a low dispersal rate,L. saxatilis is frequently found in recently established habit...
Mya arenaria currently occupies a wide geographical range in the northern hemisphere, on both coasts of the Atlantic as well as on the Pacific east coast. Some authors claim it also occurs on the Pacific west coa...
To replenish the exploited native stocks ofOstrea edulis, imports from almost all European coasts have arrived in the North Sea, particularly in the Dutch Oosterschelde estuary. The American oysterCrassostrea vir...
The American razor clamEnsis americanus (=E. directus) was introduced into the eastern North Sea in the late 1970s. By larval and poslarval drifting the species rapidly extended its distribution, now ranging from...
The green algaCodium fragile ssp.tomentosoides (Chlorophyta) has been introduced accidentally and successfully from Japan to many shores of the northern and southern hemispheres, including those of the Northeast ...
The recent introduction of the macroalgaUndaria pinnatifida (Harvey) Suringar into the North Atlantic is the latest of a large number of introductions, which have occurred over many years. Some have been delibera...
A total of ten red seaweed species are recognized as introduced into the North Sea from other parts of the world. These areAsparagopsis armata andBonnemaisonia hamifera (Bonnemaisoniales),Grateloupia doryphora (H...
Flagellate species have been shown to survive transocean passage by ballast water and the large dinoflagellateGymnodinium catenatum was introduced from Japanese to Tasmanian waters in this way.Gymnodinium mikimot...
About 80 non-indigenous species are assumed to have been introduced into the North Sea by transoceanic shipping and aquaculture. The number is certainly underestimated as most small organisms received insuffic...
The benthic ctenophoreVallicula multiformis, a large undescribed flatworm species of the genusPseudoceros, the prosobranch gastropodTonna maculosa, the opisthobranch gastropodsPlacida cf.dendritica, Caloria elega...
Scavenging seabirds in the North Sea exploit discards with different success and by different feeding techniques. Northern gannet (Sula bassana) had the highest foraging success index, followed by lesser black-ba...
Seasonal and intersexual dynamics in parameters of the length-weight relationship of the mudskipperPeriophthalmus barbarus, from Imo River estuary, Nigeria, were studied. The proportionality constant or intercept...
Within the food web of estuarine and marine rocky shore ecosystems phytophagous mites of terrestrial and marine origin constitute an important part as grazers on algae and as a food source for certain arthropo...
Living conditions for macrofauna on flood delta shoals are determined by surf, strong currents and sediment mobility. Thus, a unique assemblage of invertebrate species colonize these far off-shore, low interti...
One of the most effective techniques for evaluating stress is the analysis of developmental stability, measured by stochastic variation based particularly on fluctuating asymmetry, i.e. a variance in random de...
Although a large body of literature exists on the systematics and ecology of free-living marine and brackish-water nematodes, key questions on the nature and magnitude of interactions between nematodes and oth...
A morphological description is given of a new cerianthid larva,Isodactylactis borealis. The species, found in neuston from 37°20′N. 74°58′W., is compared with otherIsodactylactis species.
A technical device generating a constant and directed current within a sealed respiration chamber is described. It does not involve any external pumps or tubing. This system is easy to handle, and improved the...
This article is part of a Supplement: Volume 52 Supplement 1
The original article was published in Helgoländer Meeresuntersuchungen 1993 47:Art8
This article is part of a Supplement: Volume 52 Supplement 1
The original article was published in Helgoländer Meeresuntersuchungen 1993 47:Art7
This article is part of a Supplement: Volume 52 Supplement 1
The original article was published in Helgoländer Meeresuntersuchungen 1993 47:Art6
This article is part of a Supplement: Volume 52 Supplement 1
The original article was published in Helgoländer Meeresuntersuchungen 1993 47:Art5
This article is part of a Supplement: Volume 52 Supplement 1
The original article was published in Helgoländer Meeresuntersuchungen 1993 47:Art4
This article is part of a Supplement: Volume 52 Supplement 1
The original article was published in Helgoländer Meeresuntersuchungen 1993 47:Art3
This article is part of a Supplement: Volume 52 Supplement 1
The original article was published in Helgoländer Meeresuntersuchungen 1993 47:Art2
This article is part of a Supplement: Volume 52 Supplement 1
The original article was published in Helgoländer Meeresuntersuchungen 1993 47:Art1
Acrocnida brachiata (Montagu), like many other infaunal ophiuroids, has a penchant for gregariousness. In Little Killary, a small embayment on the west coast of Ireland, it colonises an e...
Concurrent with the spread of green algal mats on tidal flats, reports of macrofauna dieoffs under dense algal mats have increased in numbers. Bivalves seem to be particularly affected by persistent dense alga...
Not applicable