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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
Benthic macrofauna communities of the submersed Pleistocene Elbe valley in the southern North Sea
Springer Science and Business Media LLC - - 2007
Peter Rehm, Eike Rachor
Macrozoobenthic community structure was studied in two surveys along a transect of 13 stations following the submersed Pleistocene Elbe valley in the south-eastern North Sea during May to June 2000 and March 2001. Two replicates of bottom samples were taken with a van Veen grab of 0.1 m2 sampling size. In order to analyse the benthic macrofauna communities, the animals obtained were identified and...... hiện toàn bộ
The ultrastructure of the midgut glands inLigia italica (Isopoda) under different nutritional conditions
Springer Science and Business Media LLC - Tập 39 - Trang 367-374 - 1985
J. Štrus, P. Burkhardt, V. Storch
After a period of food deprivation,Ligia italica were refed for 2 days with different diets and their midgut glands were examined under the electron microscope with special reference to the large cells. The predominant features are the following: extended glycogen fields after sucrose-diet; numerous lipid droplets and peroxisome-like vesicles after lipid-diet (butter); swollen mitochondria and a g...... hiện toàn bộ
Red List of beetles of the Wadden Sea Area
Springer Science and Business Media LLC - Tập 50 - Trang 83-96 - 1996
V. Mahler, R. Suikat, Th. Aßmann
As no data on beetles in the Wadden Sea area are available from The Netherlands, the trilateral status of threat only refers to the Danish and German part of the Wadden Sea. In this area, in total, 238 species of beetles are threatened in at least one subregion. Of these, 189 species are threatened in the entire area and are therefore placed on the trilateral Red List. 4 species are (probably) ext...... hiện toàn bộ
Unchanging diet in a stable colony: contemporary and past diet composition of black-legged kittiwakes Rissa tridactyla at Helgoland, south-eastern North Sea
Springer Science and Business Media LLC - - 2009
Nele Markones, Nils Guse, Ommo Hüppop, Stefan Garthe
The American slipper limpet Crepidula fornicata (L.) in the northern Wadden Sea 70 years after its introduction
Springer Science and Business Media LLC - Tập 57 Số 1 - Trang 27-33 - 2003
Thieltges, D., Strasser, M., Reise, K.
In 1934 the American slipper limpet Crepidula fornicata (L.) was first recorded in the northern Wadden Sea in the Sylt-Rømø basin, presumably imported with Dutch oysters in the preceding years. The present account is the first investigation of the Crepidula population since its early spread on the former oyster beds was studied in 1948. A field survey in 2000 revealed the greatest abundance of Cre...... hiện toàn bộ
Untersuchungen zur Physiologie der Druckwahrnehmung an sessilen Krebsen(Balanus balanus undBalanus improvisus) des Sublitorals und Eulitorals
Springer Science and Business Media LLC - Tập 23 - Trang 352-364 - 1972
H. -H. Sommer
1. Seepocken (Balanus balanus L. undB. improvisus Darwin) reagieren auf plötzlichen Druckanstieg oder Druckabfall mit der Schalenschlußreaktion. Sie können Druckanstieg und Druckabfall als Reize mit verschiedenen Vorzeichen unterscheiden. 2. Auf schwache Druckreize reagieren Seepocken mit kurzer, auf starke Druckreize mit längerer Aktivitätspause. Diese Retraktionsdauer ist nicht identisch mit der...... hiện toàn bộ
Metabolism measurements ofAurelia aurita planulae larvae, and calculation of maximal survival period of the free swimming stage
Springer Science and Business Media LLC - Tập 39 - Trang 43-47 - 1985
G. Schneider, T. Weisse
Respiration, ammonia and phosphate excretion experiments were performed with planula larvae ofAurelia aurita (Scyphozoa) from Kiel Fjord, Baltic Sea, in summer 1983. The mean respiration measured was 3.22 nl O2 ind−1 h−1 (at ∼ 20 °C). Excretion experiments revealed average values of 11.41 pM NH4-N ind−1, and 0.92 pM PO4-P ind−1h−1, respectively. The atomic C:N:P ratio of excretion products was 133...... hiện toàn bộ
Wachstum und Zellteilung beiUrospora
Springer Science and Business Media LLC - Tập 13 - Trang 73-83 - 1966
Peter Kornmann
1. Alle Zellen einesUrospora-Fadens sind teilungs- und streckungsfähig. 2. Mit zunehmendem Alter der Pflanze verschiebt sich die Zone des stärksten Wachstums von der Spitze zur Basis. 3. Längs eines Fadens bilden sich von Tag zu Tag wechselnde Teilungszonen aus. 4. Im allgemeinen erreicht eine junge Zelle nach vier Tagen wieder die teilungsfähige Länge. 5. Bei täglich 14stündiger Lichteinwirkung b...... hiện toàn bộ
A benthic sled for sampling soft bottoms
Springer Science and Business Media LLC - Tập 50 - Trang 453-456 - 1996
S. Blomqvist, L. Lundgren
A new benthic sled is described.Favourable features of the sled include: simple operation, broad runners, balanced towing position, simple height adjustment of the sediment cutting edge and quick exchange of the collecting bag. Metallic parts are aluminium, making the sled light (15 kg). This sled has functioned well in coastal research for more than a decade.
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