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Zur Morphologie und Ökologie vonPolydora ciliata undP. ligni (Polychaeta, Spionidae)
Springer Science and Business Media LLC - Tập 31 - Trang 102-116 - 1978
H. Michaelis
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 of these chaetae from late larval to adult stages is described, considering the loss of provisional bristles, the variation of shape caused by the wear and the shedding of old chaetae aft...... hiện toàn bộ
Die Beeinflussung der Fischerei in der Unterelbe durch zivilisatorische Maßnahmen
Springer Science and Business Media LLC - Tập 17 - Trang 168-181 - 1968
Hans Mann
1. In den letzten Jahrzehnten sind die Fangerträge in den großen deutschen Flüssen stark zurückgegangen. 2. Von diesem Ertragsrückgang wurde auch die Elbe in ihren verschiedenen Flußabschnitten betroffen. Dies wirkte sich dahin aus, daß auch die Zahl der Berufsfischer an der Elbe erheblich zurückging. 3. Neben den Fangerträgen hat sich die Artenzahl der Fische in der Elbe vermindert. Der wichtigst...... hiện toàn bộ
Zur Hydrographie der Deutschen Bucht während des Winters 1962/63
Springer Science and Business Media LLC - Tập 10 Số 1 - Trang 231-245 - 1964
Goedecke, Erich
1. Sehr kalte und sehr eisreiche Winter sind selten von deutschen Hydrographen untersucht worden. Das Studium der Temperatur- und Salzgehaltsverhältnisse während des Eiswinters 1962/63 in der südlichen Nordsee ist daher von besonderem Interesse. Die Beobachtungsdaten stammen von 5 deutschen Nordseefeuerschiffen, den Helgoländer und den Hamburg-Hull-Route Terminstationen sowie von den „Uthörn“-Fahr...... hiện toàn bộ
Taxonomic notes on halacarids (Acari) from the Skagerrak area
Springer Science and Business Media LLC - Tập 45 - Trang 97-106 - 1991
Ilse Bartsch
A total of 27 halacarid species were found in sediments taken at 5–25 m depth off the western coast of Sweden. The four speciesCopidognathus magnipalpus, Actacarus obductus, Coloboceras longiusculus, andLohmannella multisetosa are new to the fauna of the northeastern North Atlantic; taxonomic diagnoses of these species are given.Anomalohalacarus septentrionalis andCamactognathus borealis, both new...... hiện toàn bộ
Effects of oil pollution on the development of sex cells in sea urchins
Springer Science and Business Media LLC - Tập 33 Số 1 - Trang 297-300 - 1980
Vashchenko, M. A.
The sea urchinStrongylocentrotus nudus is highly sensitive to oil pollution. Experiments were performed in winter, spring and summer over periods of 15 to 45 days. Experimental urchins were kept in water with hydrocarbon concentrations of 10 to 30 mg l−1, and control urchins in pure sea water. Thermal stimulation by Evdokimov's method was applied to obtain mature sexual products during winter and ...... hiện toàn bộ
Effect of different protein supply on growth of three populations of a crab adapted to low energy diets
Springer Science and Business Media LLC - Tập 70 - Trang 1-10 - 2016
Claudia Bas, Tomás Luppi, Eduardo Spivak
Juvenile individuals of the crab Neohelice granulata (Brachyura: Grapsoidea: Varunidae) were grown in laboratory using five artificial diets containing 3, 6, 12, 18 and 24 % of crude protein and 3 % of lipids during 7 months. Crabs belonged to three different populations. Two of them, San Antonio Oeste (SAO) and Riacho San José (RSJ) are close; they are not genetically differentiated but vary in m...... hiện toàn bộ
Influence of light quality and gassing on the vertical migration of diatoms inhabiting the Wadden Sea
Springer Science and Business Media LLC - - 2004
Klaus Wenderoth, Erhard Rhiel
Carbon and nitrogen stable isotopic inventory of the most abundant demersal fish captured by benthic gears in southwestern Iceland (North Atlantic)
Springer Science and Business Media LLC - Tập 63 - Trang 309-315 - 2009
Gianluca Sarà, Maurizio De Pirro, Mario Sprovieri, Paola Rumolo, Halldór Pálmar Halldórsson, Jörundur Svavarsson
Stable isotopes (δ13C and δ15N) were used to examine the origin of organic matter for the most representative demersal species of the SW Icelandic fishery, accounting for over 70% of landings of those species in the North Atlantic. Samples were collected during a 2-week period in early September 2004 from landings and directly during fishing cruises. Stable isotopes showed that particulate organic...... hiện toàn bộ
Mesoscale advection of Upogebia pusilla larvae through an upwelling filament in the Canaries Coastal Transition Zone (CTZ)
Springer Science and Business Media LLC - Tập 66 - Trang 537-544 - 2012
José María Landeira, Fernando Lozano-Soldevilla, Eric Desmond Barton
Larval transport has a strong influence on marine populations and ecosystem function. Traditional hypotheses establish that larvae of coastal species are swept offshore during strong upwelling periods producing low recruitment rates; however, recent studies have demonstrated that this hypothesis is not supported by larval distribution data. The present study examines the influence of upwelling fil...... hiện toàn bộ
Photoperiodic and temperature responses in the growth and tetrasporogenesis ofGigartina acicularis (Rhodophyta) from Ireland
Springer Science and Business Media LLC - Tập 38 - Trang 335-347 - 1984
M. D. Guiry
Gigartina acicularis is an intertidal, perennial red alga which reaches its northern distributional limit in the north-eastern Atlantic on the Irish coast. It has only rarely been found with reproductive structures in the British Isles. Plants isolated vegetatively from field-collected plants near the northern distributional limit in Ireland formed tetrasporangia, the tetr...... hiện toàn bộ
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