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  • 1
  • 2
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Auffret, Gérard A; Richter, Thomas; Reyss, Jean-Louis; Organo, C; Deloule, E; Gaillard, Jean-Francois; Dennielou, Bernard; Müller, C; Thomas, Biji; Watremez, P; Grousset, Francis E; Boelaert, An; Cambon, P; Etoubleau, Joel (1996): Enregistrement de lactivité hydrothermale dans les sédiments de la dorsale médio-atlantique au Sud des Açores. Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science, 323(7), 583-590
    Publication Date: 2023-05-12
    Description: In order to recognize the distribution of hydrothermal tracers south of the Azores, a series of cores has been sampled during the GEOFAR cruise. The distribution of the Mn concentrations shows that the hydrothermal influence is maximum within and to the north-west of the Lucky Strike segment. North of the East-Azores Fracture Zone the sediments are enriched in Ba which could be derived from different sources. The chemical composition of the interstitial water shows that water advection is limited. Mn, Cu, Ni fluxes evaluated in one site have increased during isotopic stages 4 and 2 and the deglaciation.
    Keywords: Antimony; Arsenic; Barium; BC; Box corer; Calcium carbonate; Chromium; Element analysis, neutron activation (NAA); Event label; GEOFAR; Iron; KB04; KF01; KF03; KF04; KF05; KF07; KF08; KF09; KF10; KF12; KF13; KF14; KF15; KF16; KF17; KF18; KF19; KF20; KF21; KG06; KG20; KS11; KS13; KS14; KS16; Latitude of event; Le Noroit; Longitude of event; Manganese; PC; Piston corer; Scandium; south of Azores
    Type: Dataset
    Format: text/tab-separated-values, 199 data points
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  • 3
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    Unknown
    PANGAEA
    In:  Supplement to: White, Stan; Warnke, Detlef A; Nilsen, T H; Müller, Carla; Morris, D A; Kharin, Gennady S; Faas, Richard W; Caston, V S D; Bjorklund, Kjell R; Talwani, Manik; Udintsev, Gleb B (1976): Initial Reports of the Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, XXXVIII, 1256 pp, https://doi.org/10.2973/dsdp.proc.38.1976
    Publication Date: 2023-08-28
    Description: Because of its position between the North Atlantic and the Arctic oceans, its young age, small size, and diversity of geological structures, the Norwegian-Greenland Sea provided a unique target for deep drilling on Leg 38 of the Glomar Challenger. From studies of the sediments and basement rocks it was expected to gain insight particularly as to the following: 1) The tectonic framework and evolution of this area with special emphasis on the continental margins and on questions concerned with shifts of spreading axis and existence of foundered continental areas. 2) The youngest times of existence of land bridges between Eurasia and North America and the effect these land bridges had on water circulation and paleoclimates. 3) The date of the initiation of glaciation and dates of glacial advances and retreats. 4) Description of the Tertiary marine microfauna and microflora of the Norwegian-Greenland Sea, which are essentially unknown at present, and investigation of their similarity with microfauna and microflora from other areas.
    Keywords: 38-337; 38-345; 38-347; 38-349; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Identification; Leg38; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Atlantic/Norwegian Sea/BASIN; North Atlantic/Norwegian Sea/RIDGE; Position; Quantity of deposit; Sample code/label; Sediment type; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 81 data points
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  • 4
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Montadert, Lucien; Roberts, David G; Auffret, Gérard A; Bock, W D; Dupeuble, P A; Hailwood, Ernie A; Harrison, William E; Kagami, H; Lumsden, D N; Müller, C M; Schnitker, Detmar; Thompson, T L; Timofeev, Pyotr P (1979): Initial Reports of the Deep Sea Drilling Project. U. S. Government Printing Office, XLVIII, 1183 pp, https://doi.org/10.2973/dsdp.proc.48.1979
    Publication Date: 2023-08-28
    Description: Unlike many cruises of the Deep Sea Drilling Project, Leg 48 was scientifically planned to drill a number of sites to systematically address the problems of passive margin evolution. Site 400 was drilled at the foot of the Meriadzek Escarpment of North Biscay in 4399 meters depth. The site was located in a half-graben forming part of a succession of tilted and rotated fault blocks near the continent/ocean boundary. Site 401 was situated on the planated edge of a tilted fault-block underlying the southern edge of the Meriadzek Terrace on the north Biscay margin. Site 402 was located on the upper slope of the northern continental margin of the Bay of Biscay. The main objectives were to establish the presence or absence of shallow water Upper Cretaceous beds, and to penetrate pre-Aptian synrift sediments and the upslope equivalent of the deep water Albian-Aptian carbonaceous mudstones penetrated at Hole 400A.
    Keywords: 48-400A; 48-401; 48-402; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Identification; Leg48; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Atlantic/BASIN; North Atlantic/SLOPE; North Atlantic/TERRACE; Position; Quantity of deposit; Sample code/label; Sediment type; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 67 data points
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  • 5
    Publication Date: 2023-09-01
    Keywords: Area/locality; Heat flow; LATITUDE; LONGITUDE; Method comment; Number; Sample, optional label/labor no
    Type: Dataset
    Format: text/tab-separated-values, 125 data points
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  • 6
    facet.materialart.
    Unknown
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Publication Date: 2024-01-12
    Keywords: Calculated; Course; CT; DATE/TIME; HE269; HE269-track; Heincke; LATITUDE; LONGITUDE; Speed; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 1726 data points
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 12 (1964), S. 158-161 
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 96 (1974), S. 280-281 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 43 (1996), S. 227-233 
    ISSN: 1420-9098
    Keywords: Conopids ; Bombus ; body size ; parasitism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The body size of the host insect in which a parasitoid develops can have important effects on its development and life history. Large and small host body size have both been suggested to be advantageous to parasitoids, depending on the life-history of the species concerned. We test field data on the bumblebeeBombus terrestris and its conopid parasitoids for evidence of differences in size between parasitised and unparasitised worker bees. Bees acting as hosts for conopid parasitoids are on average larger-bodied than unparasitised bees. This result holds for bees collected in two different years, and whether bees are collected while foraging or from the nest. The results we present demonstrate differential parasitism of hosts of different body sizes, but do not necessarily indicate active host choice by conopids. However, they are in agreement with independent evidence that conopids develop more successfully in large-than in small-bodied hosts.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Ergebnisse aus einer Feldstudie zur Ökologie eines Wirt-Parasit Systems, bestehend aus mehreren Arten von parasitoiden Fliegen (Conopidae, Diptera) und ihren Hummel-Wirten (Bombini, Apoidea, Hymenoptera), werden dargestellt. Wirtstiere wurden systematisch in verschiedenen Untersuchungsgebieten über eine ganze Saison gesammelt und auf erfolgreiche Parasitierung, erkennbar am Puparium der endoparasitischen Fliege, geprüft. Parasitierung erfolgt vor allem in den Sommermonaten (Juli–September), wobei die beobachtete maximale Häufigkeit des Befalls 46.7% (für Arbeiterinnen) betrug. Durchschnittlich sind 13.2% aller Arbeiterinnen (Spannweite: 0–46,7%) und 7.1% aller Männchen (0–28.6%) befallen, d.h. enthielten ein Puparium wenn die Tiere nach ihrem Tod im Labor eröffnet wurden. Zwei Conopiden-Gattungen,Sicus (64% der Beobachtungen) undPhysocephala (36%) waren zu finden, wobei die letztere später im Jahr häufiger wird. Eine multivariate Analyse zeigte, dass Wirtsart, Geschlecht (Arbeiterin, Männchen) und Undersuchungsgebiet die wichtigsten Faktoren sind, welche die Wahrscheinlichkeit der Parasitierung beeinflussen. Im Durchschnitt waren Männchen weniger befallen als Arbeiterinnen. Das ausgeprägte saisonale Auftreten der Conopiden scheint in erster Linie für die Unterschiede im Befall zwischen Wirtsarten verantwortlich zu sein. So sind frühe Arten (z.B.B. pratorum) und früh fliegende Königinnen vonBombus undPsithyrus im Frühjahr kaum befallen. Die Ergebnisse werden im Zusammenhang mit dem möglichen Einfluss der Conopiden auf die Ökologie und Evolution des Wirts diskutiert. Zusätzliche Beobachtungen über das Vorkommen weiterer wichtiger Endoparasiten (Sphaerularia bombi undSyntretus sp.) werden berichtet.
    Notes: Summary We present field data on the ecology of a host-parasite system, consisting of several species of parasitoid flies (Conopidae, Diptera) and their bumblebee hosts (Bombini, Apoidea, Hymenoptera). Host animals were systematically sampled from different study sites throughout a season and checked for successful infestation in the form of puparia of these endoparasitic flies. Such dissection of the bees revealed that infestation occurs primarily during the summer months (June to September), with an observed maximum frequency of parasitization of 46.7% in workers in one of our study sites. On average, 13.2% of all workers (range 0–46.7%) and 7.1% of all males (range 0–28.6%) contained the puparium of a conopid. Two conopid generaSicus (64% of cases) andPhysocephala (36%) accounted for the infestation, with the latter being more abundant later in the year. A multivariate analysis identified host species, sex (male or worker), and study area as the most important factors accounting for the observed variance in the probability of being parasitized during the summer months. On average, males were less affected than workers. The marked seasonal appearance of conopids seems to account for differences among species, in particular for low levels of infestation among species completing their life cycles early (e.g.B. pratorum) and among the early flying, hibernated quens ofBombus andPsithyrus species. The results are discussd with respect to the impact of conopids on host ecology and evolution. Additional observations on the occurrence of further endoparasites (Sphaerularia bombi andSyntretus sp.) are reported.
    Type of Medium: Electronic Resource
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