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Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189593
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The phytogeography ofCladophora (Chlorophyceae) in the northern Atlantic Ocean, in comparison to that of other benthic algal species
About 43Cladophora species inhabit the coasts of the northern Atlantic Ocean. These can be subdivided into seven distribution groups: (a) the tropical western Atlantic group (16 species); (b) the warm temperate M...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189592 -
Populationsdynamik, produktivität und energiehaushalt des wattwurmsArenicola marina (Annelida, Polychaeta)
Dispersion, abundance dynamics, size-frequency, mortality, growth, biomass, productivity, energy flow, germ-cell development, sex ratio, breeding season, natality and fertility ofArenicola marina were investigate...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189589 -
Der Fortpflanzungszyklus vonCyathura carinata (Isopoda, Anthuridea) im Nord-Ostsee-Kanal
The life cycle ofC. carinata (Krøyer) from the Kiel Canal and the seasonal change of its population structure have been studied.C. carinata is a protogynic hermaphrodite which may attain an age of 3 years. The yo...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189587 -
Life cycle ofCorophium insidiosum (Crustacea, Amphipoda) in laboratory culture
The life cycle ofCorophium insidiosum (Crawford) was investigated for the first time in laboratory cultures. This amphipod is mainly a suspension feeder, but it can also switch to deposit feeding. It was cultivat...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189586 -
Combined effects of cadmium, copper and lead on developing herring eggs and larvae
Eggs of Baltic herring were incubated (10°C; 16‰S) in sea water containing mixtures of Cd, Cu and Pb at concentrations of 0.56–5.0, 0.0167–0.15, 0.56–5.0 mg metal/l; embryonic survival until hatching, viable h...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189585 -
Veröffentlichungen des Stabes der Biologischen Anstalt Helgoland, die anderenorts erschienen sind
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189901 -
Morphologische und ökologische Grundlagen der Vorlandsicherung durchPuccinellia maritima (Gramineae)
Investigations on the influence of daylength, light intensity, inundation and accretion tolerance on the morphological and ecological characteristics ofPuccinellia maritima in connection with the role of increasi...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189900 -
Chromatophorenanordnungen in emersen Thalli vonFucus vesiculosus unter verschiedenen Lichtbedingungen
The effects of light and darkness on chromatophore arrangements inFucus vesiculosus thalli exposed to air with one side (half dry) or with both sides (dry) were investigated. Low-intensity arrangement, high-inten...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189899 -
Daylength and development in four species of Ceramiaceae (Rhodophyta)
Developmental patterns in four species of Ceramiaceae were determined using excised thallus apices grown under a range of light periods. Models of thallus development and organization based on these patterns a...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189898 -
Kompensation extremer Umwelteinflüsse beiBalanus balanus als Anpassung an die sessile Lebensweise
In the sessile barnacleBalanus balanus L. the relationship between stimulus duration and reaction intensity varies considerably. Investigations on the light reactions (increased cirral activity per unit time) and...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189897 -
Kombinierte Wirkungen von Temperatur, Salzgehalt und Cadmium auf Entwicklung, Wachstum und Mortalität der Larven vonMytilus edulis aus der westlichen Ostsee
The response surface method was used to study the effects of temperature, salinity and Cd contamination on the development of fertilized eggs ofMytilus edulis from the western Baltic Sea to the veliger stage as w...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189896 -
Influence of salinity and cadmium on the volume of Pacific herring eggs
Changes in total volume and volume of the yolk and perivitelline space of Pacific herring eggs were examined throughout incubation at 5°C in relation to salinity of the incubation medium (5, 20, 35‰ S), and af...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189895 -
Influence of salinity and cadmium on capsule strength in Pacific herring eggs
Eggs of Pacific herring (Clupea pallasi) were incubated at 5°C in salinities of 5, 20, and 35‰, and in cadmium concentrations of 0.05, 0.1, 1, 5, and 10 ppm (20‰ S). Bursting pressures of eggs in the eight groups...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189894 -
Untersuchungen über die Auswirkung kommunaler Abwässer auf das benthische Ökosystem mariner Watten
The influence of domestic sewage on intertidal sand and mud flat benthic communities has been studied at three minor outfalls around the North Sea island of Sylt (F. R. Germany) and at the main outfall of Vanc...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189893 -
Spatial configurations generated by motile benthic polychaetes
Micro-spatial patterns of five infaunal polychaete species were investigated on tidal flats in the Wadden Sea (island of Sylt, North Sea). Sediment samples were taken within plots of 4 m2 at regular distances or ...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189892 -
Laboratory experiments on the larval development ofHyas araneus (Decapoda, Majidae)
Experiments have been carried out on the duration of larval development of the spider crabHyas araneus L., in relation to temperature, food quality, and individual variation. A graphical model is presented which ...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189891 -
Zur Ökologie der Polychaeten des Helgoländer Felslitorals
The ecology and distribution of the polychaetes inhabiting the rocky interidal zone of the island of Helgoland (German Bight, North Sea) were studied at five ecologically different stations.Scolelepis squamata, M...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1979 32:BF02189890 -
Buchbesprechungen
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189498 -
Zur Mathematik des tierischen Wachstums
The parameters of the Gompertz function, the Bertalanffy function, and the reciprocal function (Krüger, 1962) are calculated for comparison using growth data obtained by Weymouth et al. (1930, 1931) for the ra...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189497 -
Effects of short-term storage of gametes on fertilization of Pacific herring eggs
A method is described whereby arrays of samples ofClupea pallasi eggs may be stored during their preparation. The high fertilization potential retained by the eggs during short-term storage allows them to be fert...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189496 -
Fate and effects of cadmium in an experimental marine ecosystem
Two recirculated marine seawater systems (capacities: 150 and 300 l) were used for the study on cadmium accumulation of biological filter sludge, by the musselMytilus edulis and the plaicePleuronectes platessa fo...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189495 -
Development of a subtidal epifaunal community at the island of Helgoland
Epifaunal community development on plexiglas panels submerged in Helgoland Harbour (North Sea) was observed over one year. The course of colonization is described, and some data are presented on autecology, re...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189494 -
Modalités de la contamination d'une chaine trophique marine benthique par l'argent 110 m
The distribution of110mAg was studied in various invertebrates of a marine benthic food chain as a consequence of the immersion in contaminated seawater and/or ingestion of radioactive food. The studies on110mAg ...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189493 -
Die Feinstruktur der Ästheten vonChiton olivaceus (Mollusca, Polyplacophora)
The aesthete organs in the shell of the polyplacophoranChiton olivaceus (Spengler) were studied by scanning and transmission electron microscopy. Compared to previously described species they reveal marked differ...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189492 -
Contribution to the hydrographical structure of the eastern German Bight
Temperature, salinity, micronutrients, seston components and mesozooplankton were measured on a cruise in the eastern German Bight during November 1976. Three different water bodies and a mixing area which is ...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189491 -
DieBlidingia-Arten von Helgoland (Ulvales, Chlorophyta)
Based on field studies and cultivation, fourBlidingia-species have been established for Helgoland (North Sea). One of them, hitherto not separated fromB. minima, is regarded as beingB. chadefaudii, though differi...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189490 -
Buchbesprechungen
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189489 -
Concentrations of particulate matter in the North Frisian Wadden Sea
The amount of particulate matter for different size classes was determined in the North Frisian Wadden Sea over a period of 10 months from November 1973 to August 1974. Particle volume, particulate organic car...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189488 -
Life cycles, phylogeny and taxonomy ofDissodinium andPyrocystis (Dinophyta)
Life cycles of several species belonging to the marine generaDissodinium Klebs in Pascher andPyrocystis Murray ex Haeckel are described. The two known species ofDissodinium, D. pseudolunula Swift ex Elbr. & Dreb....
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189487 -
Untersuchungen zur lichtinduzierten Chromatophorenverlagerung beiFucus vesiculosus
Light-induced transmission changes, measured microphotometrically in the brown algaFucus vesiculosus, are mainly the result of chromatophore displacements. Dose-response curves, as well as observations by microsc...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189486 -
Die Oocyten der GrundelPomatoschistus minutus
The egg membrane and follicle of the oocytes ofPomatoschistus minutus were investigated by light and electron microscopy. The formation of the cortex radiatus begins in late stage I and is concluded in stage III....
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189485 -
In-situ investigations on small-scale local and short-term changes of sublittoral macrobenthos in Lübeck Bay (western Baltic Sea)
In-situ studies on sublittoral soft bottom macrofauna (depth: 14–16 m) employing the underwater laboratory (UWL) “Helgoland” were carried out. Sets of samples were compared for small-scale local and short-term...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189484 -
Belichtungs-und Beschattungsreaktionen beiBalanus balanus
The present paper reports on the responses of the barnacleBalanus balanus L. to various light-dark cycles (30/30 min–360/360 min). As measured by cirral activity (cirrus beats per unit time), an increase of stimu...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189483 -
On the dynamics of exploited populations ofTisbe holothuriae (Copepoda, Harpacticoida)
A total of 75 weekly exploited populations of the harpacticoid copepodTisbe holothuriae Humes were exposed to 0.06, 0.3, 1.5, 7.5 or 37.5 μg Cd++l−1, combined with exploitation rates of 10, 30, 50, 70 or 90% unde...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189482 -
Zur Ökologie vonPomatoceros triqueter (Serpulidae, Polychaeta)
Based on previous studies (Klöckner, 1976b) dealing with field investigations on breeding season, choice of substratum, growth and mortality of the sessile filter-feeding tube wormPomatoceros triqueter in Helgola...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02189481 -
Veröffentlichungen des Stabes der Biologischen Anstalt Helgoland, die anderenorts erschienen sind
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02297001 -
Viable phototrophic sulfur bacteria from the Black-Sea bottom
Phototrophic sulfur bacteria were isolated from Black-Sea mud at depths of 660 and 2,240 m. The species obtained in pure cultures were identified asChromatium warmingii andThiocapsa roseopersicina. In addition,Ch...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02297000 -
A simplified14C method for grazing measurements on natural planktonic populations
The method used consists of adding highly radioactive material (40 μCi/1 NaH14CO3) to sea water with its natural concentrations of zoo- and phytoplankton, incubating this water in the light, separating zoo- from ...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296999 -
Beiträge zur Ökologie vonPuccinellia capillaris auf Helgoland
Puccinellia capillaris (Liljebl.) Jansen has been investigated at various localities around the island Helgoland (North Sea) from 1968 onwards. Ecological studies at 68 locations including an analysis of soil fa...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296998 -
Nahrung und Freßverhalten bei Sedimentfressern dargestellt am Beispiel von Sipunculiden und Holothurien
Using a Phillipson microbomb calorimeter, the energy values of the “infauna-substrate-feeders”Sipunculus nudus andPhascolosoma vulgare and the nutritive value of their food substrate were determined. Calorific me...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296997 -
Experimental studies on the light sense in the hagfish,Eptatretus burgeri andParamyxine atami (Cyclostomata)
Photo-reception and sensitivity to light were studied in two Japanese hagfishes,Eptatretus burgeri living in shallow water andParamyxine atami living in water of about 100m depth. Both species responded to genera...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296996 -
Ultrastructural observations on the gills of polychaetes
The gills of several polychaete species belonging to 9 families were studied by scanning and transmission electron microscopy. The surface epithelium is covered by a thin cuticle which is invaded by microvilli...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296995 -
Microanatomy of the cubopolyp,Tripedalia cystophora (Class Cubozoa)
The microanatomy of a cubopolyp (polypoid stage of Cubomedusae) is described for the first time. The 0.5–1.0 mm long polyp ofTripedialia cystophora has an oral cone with special lip cells at the mouth. Next is a ...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296994 -
Daily activity pattern ofAstropecten aranciacus (Echinodermata: Asteroidea) and two related species under natural conditions
Daily activity patterns ofAstropecten aranciacus, A. bispinosus andA. jonstoni were investigated by means of SCUBA diving. The three species generally showed two peaks of activity, at dawn and dusk. However, the ...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296993 -
Zur Morphologie und Ökologie vonPolydora ciliata undP. ligni (Polychaeta, Spionidae)
The polychaete wormsPolydora ciliata andP. ligni were investigated with regard to the morphology of their fifth chaetigerous segment, bearing bundles of modified bristles in a special arrangement. The development...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296992 -
Experiments on epibenthic predation in the Wadden Sea
Field experiments were designed to evaluate the role of predators in the Wadden Sea, small predators like shore crabs, shrimps and gobies, and large ones like flatfish and birds. Exclosures, maintained in aCoroph...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296991 -
Accumulation of americium 243 in selected brackish and marine invertebrates
As an initial step in a programme designed to investigate factors which are of importance in affecting the behaviour of actinides towards certain invertebrates found in estuarine and marine environments, labor...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296990 -
Interaction between genetic, external and parasitic factors in sex determination of the crustacean amphipodGammarus duebeni
Sex determination inGammarus duebeni duebeni was analyzed by breeding experiments conducted with individuals obtained from various populations. Sex ratio of progeny depends on genetic factors and photoperiod. Gen...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1978 31:BF02296989 -
Notes on the swim-bladder physiology of cod(Gadus morhua) investigated from the underwater laboratory “Helgoland”
In situ sampling of gas from cod swim-bladders took place during a fortnight's saturation mission with the underwater laboratory “Helgoland“ in May–June 1975. These samples were compared to those done by the c...
Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 29:BF01609983