Not applicable
Articles
Page 19 of 51
-
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368412
-
The challenge to marine biology in a changing world: Future perspectives, responsibility, ethics
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368410 -
Perspectives in European cooperation in biological oceanography
European cooperation in biological oceanography is indispensable for geographical, political and financial reasons.
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368409 -
The Gulf of Nicoya Estuary, Costa Rica: Past, present, and future cooperative research
The Gulf of Nicoya is a tectonic estuary on the Pacific coast of Costa Rica (10°N–85°W), extending about 100 km from the Tempisque river to the 500 m isobath. A dry season (December–April) and a rainy season (...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368405 -
The potential of and limitations to marine population prognosis
Following the 19th century recognition and definition of basic ecological entities, functional analysis has been the highlight of this century. The synthesis of these findings enables ecological prognosis. The...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368404 -
Solitary wave calculations for erosion strength
For the calculation of steep water waves, a Lagrangian method is presented. This makes it easier to derive and understand the complicated non-linear structure of the equations of motion (EOM), for the behaviou...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368403 -
Pheromones in marine algae: A technical approach
It is now well known that many marine organisms use low-molecular volatile substances as signals, in order to coordinate activities between different individuals. The study of such pheromones requires the isol...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368402 -
The 1-Hz fluorometer: A new approach to fast and sensitive long-term studies of active chlorophyll and environmental influences
A new instrument for environmental monitoring, called at 1-Hz fluorometer, provides two modes of application. First, it enables a quantitative determination of algal concentrations down to 20 ng/l. Second, it ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368401 -
Model methods for the analysis of mesocosm experimental studies
The response of experimental ecosystem dynamics to varying nutrient loads was studied by analysing oxygen time-series. Time-series had been continuously recorded, and the data were analysed on a daily basis us...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368400 -
Population dynamics and parasitation of planktonic and epibenthic crustaceans in the Baltic Schlei fjord
The planktonic and epibenthic crustacean fauna from two sites of the brackish Schlei fjord, Northern Germany, was investigated over a six-month period. Calanoid and cyclopoid copepods were more abundant in low...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368399 -
Food control by applied biochemistry of marine organisms: Comparison of proteins and metabolites from fish and invertebrate muscle
Most fishery products consist of muscle tissue from fish and invertebrates. Differences in the molecular structure and in metabolism of muscles can be utilized to characterize and identify various seafood. Cre...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368398 -
Carbonic anhydrase, a respiratory enzyme in the gills of the shore crabCarcinus maenas
This paper summarizes investigations on the enzyme carbonic anhydrase (CA) in the gills of the osmoregulating shore crabCarcinus maenas. Carbonic anhydrase, an enzyme catalyzing the reversible hydration of CO2 to...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368397 -
The carbonic anhydrase of the Chinese crabEriocheir sinensis: Effects of adaption from tap to salt water
In the present investigation we studied the carbonic anhydrase (CA) in various tissues of Chinese crabEriocheir sinensis which were acclimated to different salinities (0, 10, 20, 30‰). We found only negligible CA...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368396 -
How to overcome osmotic stress? Marine crabs conquer freshwater. New insights from modern electrophysiology
In the present article we review our findings on split lamella preparations of crab gills mounted in modified Ussing-chambers with respect to mechanistic and ecophysiological aspects. The leaky gill epithelium...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368395 -
Acidification of the gill cells of the shore crabCarcinus mediterraneus: Its physiological significance
In a preparation of isolated gills of the shore crabCarcinus mediterraneus perfused with dilute sea water (pH 8.1, 200 mM Na+) which was identical to the bathing solution of the gill, acidification of the collect...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368394 -
Thirty years of marine ecotoxicological studies at the TNO Laboratory for Applied Marine Research, Den Helder (The Netherlands)
This paper reviews the development of marine field ecotoxicology at the TNO Laboratory for Applied Marine Research. The scope of research, including biological monitoring with mussels, mesocosm studies and eco...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368392 -
Fate and distribution of toxic heavy metals in some marine organisms from the eastern Adriatic coast
The paper reports on levels of heavy metals in some organisms from the eastern Adriatic coast and polluted areas near a big urban centre (Split area). Surprisingly high Hg and MeHg concentrations were found in...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368391 -
Pollution effects in Visakhapatnam harbour, India: An overview of 23 years of investigations and monitoring
Visakhapatnam Harbour, a semi-enclosed water body on the east coast of India, is subject to a high degree of pollution caused by industrial and urban wastes. Studies carried out during the last twenty years or...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368388 -
How large an area of sea do Helgoland seabirds use for foraging during the breeding season?
Of the species examined, only the guillemot remained within the study area, while other species ranged much further from the colony to forage. The number of guillemots present at sea was 2943±222 birds as calc...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368385 -
Protected areas in the North Sea: An absolute need for future marine research
There are many signals that different human activities affect the marine ecosystem on local and sometimes regional scales. There is evidence that in the Dutch sector of the North Sea at least 25 species have d...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368384 -
Mesozooplankton in the northern Wadden Sea of Sylt: Seasonal distribution and environmental parameters
A statistical analysis was performed to determine environmental factors of significant influence on the mesozooplankton in the northern Wadden Sea of Sylt (German Bight) in 1991. The total mesozooplankton (>76...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368382 -
Benthos structure on tropical tidal flats of Australia
General features of benthos communities of tropical tidal flats are defined from northeast Australia, based on surveys from 1988 to 1991 in Hinchinbrook Channel and in the Haughton River estuary. A zonation of...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368381 -
Floating of mud snailsHydrobia ulvae in tidal waters of the Wadden Sea, and its implications in distribution patterns
Juvenile mud snailsHydrobia ulvae disperse by floating at the water surface in summer. The routes of dispersal are determined by the hydrography of the specific area and can be successfully predicted by a hydrogr...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368380 -
Macroalgal mass development in the Wadden Sea: First experiences with a monitoring system
The distribution and cover density of macroalgae (Chlorophyta, Ulvaceae) were estimated by means of aerial surveys in 1990–1992 in the Wadden Sea of Niedersachsen, an intertidal area of some 1200 km2 situated at ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368379 -
Physical and physiological aspects of gear efficiency in North Sea brown shrimp fisheries
In search of means to reduce the by-catch of juvenile flatfish in the shrimp fishery, vibrations and changes in current velocity caused by shrimp trawls were investigated in the field and in the laboratory. Bu...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368378 -
Predictive ecosystem research in the Wadden Sea
Predictive ecosystem research needs a pluralistic approach. Retrospective studies reveal the initial causes of ongoing ecological change. In the Wadden Sea, inherent ecosystem stability may be falsely assumed,...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368377 -
History of marine biological investigations in Poland
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368376 -
History of the Marine Biological Association of the United Kingdom
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368374 -
The creation of the first marine biological stations in North Russia
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368373 -
The Littoral Station of Aguda, in the North of Portugal
The public authorities have recently approved the building of a Littoral Station in Aguda, a small fishing village on the Atlantic coast, 15 km south of the River Douro estuary in the municipal area of Vila No...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368369 -
Marine research in Greece and the additional Greek marine research centres: Progress and present situation
Greece, as is known, has a coastline of 17 000 km, and over 2000 small and large islands. As expected, the quest of humankind for new sources of matter and energy has been focussed on the sea, with fishery bei...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368367 -
The development of the research mission in marine biology stations
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368366 -
Phaeocystis globosa and the phytoplankton succession in the East Frisian coastal waters
The phytoplankton succession and related abiotic variables were investigated within the frame of a monitoring programme. Results from 1985 to 1991 are presented. For the prymnesiophytePhaeocystis globosa, an incr...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368365 -
The Dogger Bank: A special ecological region in the central North Sea
This paper is a review of the present state of knowledge about the ecology of the Dogger Bank, a shallow area in the central southern North Sea. The biological situation in this region is different from other ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368361 -
Do test cells secrete a hatching enzyme inAscidiella aspersa (Tunicata, Ascidiacea)?
The hatching enzyme ofAscidiella aspersa has been characterized as a trypsin-like enzyme. It dissolves the main part of the chorion and renders hatching possible at the end of embryogenesis. In contrast to Knaben...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368357 -
Perspectives in marine science: A European point of view
Marine research has always been a field in science which was particularly open to, and at times dependent on, international cooperation, and this has become even more obvious during the last decade when issues...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368353 -
Estimation of the microbial biomass in tidal flat sediment by fumigation-extraction
A transect of ten profiles was laid out in 20 m intervals on a tidal sand flat approximately 100 m from the east shore of Sylt until the next tideway was reached. Sediment samples were taken from 0–2 cm depth ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368351 -
FDA hydrolysis and resazurin reduction as a measure of microbial activity in sediments from the south-east Atlantic
Esterase and dehydrogenase activities were determined in depth profiles of sediments from the south-east Atlantic using fluorometric methods. The sensitivity of both methods was sufficient to record enzymatic ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368349 -
Microbial activity in the sediment of the Sognefjord (Norway)
The activity of microorganisms was investigated in sediment samples of the Norwegian Sognefjord at a 1260 m depth. The enzymatic potential (measured, using the cleavage of fluoresceindiacetate FDA) ranged betw...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368347 -
Microbes as a challenge to concepts of marine ecosystem analysis
As theory of science is subject to conflicting ideas, the role of microbiology in marine ecosystem analysis is viewed from extremely different positions. Combined descriptive and experimental approaches have e...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368344 -
Ornithology on the island of Helgoland and the role of the Biologische Anstalt up to the foundation of the separate “Vogelwarte”
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368343 -
On the relation between the Institut für Meereskunde in Berlin and the Biologische Anstalt Helgoland
The “Institut für Meereskunde” (IfM) in Berlin, founded in 1900, first took up marine biology as a section of its museum, in which emphasis was placed on the environment and the components of local ecosystems ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368342 -
Friedrich Heincke — the Right Man at the Right Time
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368341 -
Nathanael Pringsheim and the Foundation of the Biologische Anstalt Helgoland
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368340 -
Five scientists on excursion — a picture of marine biology on Helgoland before 1892
Five scientists on excursion — a picture of marine biology on Helgoland before 1892. The picture, of which several variant poses with minor differences exist, is a photograph taken on Helgoland in September, 1...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368339 -
One hundred years of the Biologische Anstalt Helgoland on the island of Helgoland, a cliff in the North Sea steeped in the tides and currents of history
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368337 -
120 years of investigations on zoobenthos in the southern Baltic
The scheme of macrozoobenthos research development in the southern region of the Baltic Proper is presented here. In the course of a 120-year-long investigation cycle, four different, partly overlapping period...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368336 -
The contribution of marine biology to biomedical research: Past, present, future
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368335 -
Congratulatory address of the former Director of the Biologische Anstalt Helgoland
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368332 -
International Helgoland Symposium 1992 The centennial of the Biologische Anstalt Helgoland “The challenge to marine biology in a changing world”
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368330