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  • 1
    Call number: (DE-599)GBV03709842X
    Type of Medium: Monograph available for loan
    Language: German
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    Call number: AWI G6-19-92375
    In: Berichte / Christian-Albrechts-Universität zu Kiel, Institut für Geowissenschaften, Nr. 9
    Type of Medium: Monograph available for loan
    Pages: 278 Seiten , Illustrationen
    ISSN: 0175-9302
    Series Statement: Berichte / Christian-Albrechts-Universität zu Kiel, Institut für Geowissenschaften 9
    Language: German
    Note: Zugleich: Dissertation, Christian-Albrechts-Universität zu Kiel, 1999 , INHALTSVERZEICHNIS 1. Einleitung 1.1 Kenntnisstand und offene Fragen 1.2 Fragestellung und Ziele dieser Arbeit 2. Umweltbedingungen in den Arbeitsgebieten 2.1 Hydrographie, Eisverhältnisse und NAO 2.2 Zur Variation von Wassertiefe und Breite der Dänemarkstraße und zur Vereisung Islands während des letzten Glazials 3. Methoden 3.1 Auswahl der Kernstationen 3.2 Probennahme und Analysen (Übersicht) 3.3 Zur Rekonstruktion von Paläobedingungen im Oberflächenwasser Zur Aussage stabiler Isotopenverhältnisse in planktischen Foraminiferen Zur Messung stabiler Isotopenverhältnisse Zur Massenspektrometrie Zur Rekonstruktion von Oberflächentemperaturen Alkane und Alkohole als Maß für Staubeintrag Eistranspmtiertes Material und vulkanische Aschen 3.4 Zur Rekonstruktion von Paläobedingungen im Zwischen-/ Tiefenwasser Häufigkeit von Cibicides- und anderen benthischen Arten (inkl. Taxonomie) Stabile Isotopenverhältnisse in benthischen Foraminiferen 3.5 AMS 14C-Datierungen Probenreinigung 3. 6 Hauptelementanalysen von vulkanischen Asche-Leithorizonten 3. 7 Geomagnetische Meßgrößen und magnetische Suszeptibiltät 3.8 Techniken zur Spektralanalyse 4. Methodische Ergebnisse 4.1 Zum Einfluß der Probenreinigung auf δ18O-/ δ13C-Werte 4.2 Probleme bei der langfristigen Reproduzierbarkeit von δ18O-Zeitreihen 4.3 Einfluß der Korngröße und Artendefinition planktischer Foraminiferen auf SST-Rekonstruktionen in hohen Breiten 4.4 Vergleich der stabilen Isotopenwerte von Cibicides lobatulus und Cibicidoides wuellerstorfi 5. Stratigraphische Grundlagen und Tiefenprofile der Klimasignale 5.1 Stratigraphische Korrelation zwischen parallel-gekernten GKG- und SL-/KL-Profilen 5.2 Flanktische δ18O-/ δ13C-Kurven, 14C-Alter und biostratigraphische Fixpunkte Westliches Islandbecken Kern PS2644 Kern PS2646 Kern PS2647 Kern 23351 Vøring-Plateau Kern 23071 Kern 23074 5.3 Benthische δ18O-/ δ13C-Werte in Kern PS2644 5.4 Siliziklastische Sedimentkomponenten: Eistransportiertes Material Westliches Islandbecken Kern PS2644 Kern PS2646 Kern PS2647 Vøring-Plateau Kern 23071 Kern 23074 5.5 Vulkanische Glasscherben in Kern PS2644: Wind- und Eiseintrag 5.6 Geochemie und Alter einzelner Tephralagen als Leithorizonte Westliches Islandbecken Kern PS2644 Kern PS2646 Kern PS2647 Vøring-Plateau Kern 23071 Kern 23074 5.7 Magnetische Suszeptibilität in den Kernen PS2644, PS2646 und PS2647 Kern PS2644 Kern PS2646 und PS2647 5.8 Geomagnetische Feldintensität und Richtungsänderungen in Kern PS2644 5.9 Variation von Planktonfauna und -flora Westliches Islandbecken: Kern PS2644 Kern PS2646 und PS2647 Vøring-Plateau: Kern 23071 und 23074 5.10 Benthische Foraminiferen in Kern PS2644 6. Entwicklung von Temperatur und Salzgehalt nördlich der Dänemark-Straße 6.1 Variation der Oberflächentemperatur nach Planktonforaminiferen 6.2 Variation der Oberflächentemperatur nach Uk37 6.3 Variation der Oberflächensalinität 7. Die Feinstratigraphie von Kern PS2644 als Basis für eine Eichung der 14C-Altersskala 22 - 55 ka 7.1 Korrelation zwischen den Klimasignalen in Kern PS2644 und der GISP2-Klimakurve zum Kalibrieren der 14C-Alter und Erstellen eines Altersmodells Tephrachronologische Marker Korrelationsparameter und -regeln Sonderfälle/ Probleme bei der Korrelation 7.2 Alters-stratigraphische Korrelation der Klimakurven von Kern 23071 und 23074 7.3 Variation der Altersanomalien zwischen 20 und 55 14C-ka 7.4 Variabilität des planktischen 14C-Reservoiralters in Schmelzwasserbeeinflußten Seegebieten Variation der planktischen 14C-Alter unmittelbar an der Basis von Heinrich-Ereignis 4 Unterschiede zwischen planktischen und benthischen 14C-Altern in der westlichen Islandsee. Zur Erklärung der inversen Altersdifferenzen 7.5 Differenz zwischen 14C- und Kalenderalter: Zeitliche Variation unter Einfluß des Erdmagnetfeldes - Modell und Befund 7.6 Sedimentationsraten der Kerne 23071, 23074 und PS2644 nach dem GISP2-Altersmodell Vøring-Plateau: Kerne 23071 und 23074 Südwest-Islandsee: Kern PS2644 8. Klimaoszillationen im Europäischen Nordmeer in der Zeit und Frequenzdomäne 8.1 "Der Einzelzyklus" in den Klimakurven von Kern PS2644 8.2 Zur Veränderlichkeit der Warm- und Kaltextreme sowie Zyklenlänge Besonderheiten in der Zyklenlänge Variation der Kalt-(Stadiale) Variation der Interstadiale 8.3 Periodizitäten der Klimasignale im Frequenzband der D.-Oe.-Zyklen. Der D.-Oe.-Zyklus von 1470 J., seine Multiplen und harmonischen Schwingungen Weitere Frequenzen: 1000-1150 Jahre- und 490- 510 Jahre-Zyklizitäten Höhere Frequenzen im Bereich von Jahrhunderten und Dekaden 8.4 Phasenbeziehungen und (örtliche) Steuemngsmechanismen der Dansgaard-Oeschger-Zyklen 9. Schlußfolgerungen Danksagung Literaturverzeichnis Anhang
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  • 3
    Call number: AWI A3-20-93434-2
    In: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin, Band XXXII, Heft 2
    Type of Medium: Series available for loan
    Pages: 218 Seiten , Illustrationen
    Series Statement: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin 32,2
    Language: German
    Note: Zugleich: Dissertation, Freie Unversität Berlin, [ca. 1963] , INHALTSVERZEICHNIS PROBLEMSTELLUNG UND ZIELSETZUNG 1. BEMERKUNGEN ZUM BEOBACHTUNGSGELÄNDE UND ZUM BEOBACHTUNGSMATERIAL 1.1 Das Beobachtungsgelände 1.2 Das Beobachtungsmaterial 2. HOMOGENITÄTSBETRACHTUNGEN 2.1 Temperatur 2.2 Niederschlag 2.3 Wind 2.4 Sonnenschein und Bewölkung 3. TEMPERATURVERHÄLTNISSE 3.1 Monats- und Jahreswerte 3.2 Tageswerte 3.3 Pentadenwerte 3.4 Häufigkeitsbetrachtungen 3.5 Interdiurne Veränderlichkeit 3.6 Der tägliche Gang 3.7 Vorkommen bestimmter Schwellenwerte 3.71 Frost- und Eistage 3.72 Sommer- und Tropentage 4. DER WASSERGEHALT DER LUFT 4.1 Monats- und Jahreswerte 4.2 Tageswerte 4.3 Häufigkeitsbetrachtungen 4.4 Interdiurne Veränderlichkeit 4.5 Der tägliche Gang 5. BEWÖLKUNGSVERHÄLTNISSE 5.1 Monats- und Jahreswerte 5.2 Tageswerte 5.3 Häufigkeitsbetrachtungen 5.4 Der tägliche Gang 5.5 Heitere und trübe Tage 5.6 Nebel 6. SONNENSCHEIN 6.1 Monats- und Jahreswerte 6.2 Tageswerte 6.3 Der tägliche Gang 7. NIEDERSCHLAGSVERHÄLTNISSE 7.1 Monats- und Jahreswerte 7.2 Niederschlagsbereitschaft 7.3 Tageswerte 7.4 Der tägliche Gang 7.5 Häufigkeitsbetrachtungen 7.6 Niederschlags- und Trockenperioden 7.7 Niederschlag und Wind· 7.8 Schneeverhältnisse 7.81 Schneefall und Schneedecke 7.82 Schneehöhe 7.9 Gewitter 8. WINDVERHÄLTNISSE 8.1 Windrichtung 8.2 Windgeschwindigkeit 8.21 Der jährliche Gang 8.22 Häufigkeitsbetrachtungen 8.23 Sturmtage und Windstillen 8.24 Der tägliche Gang 9.ZUSAMMENFASSUNG VERZEICHNIS DER TEXTTABELLEN VERZEICHNIS DER ABBILDUNGEN LITERATURVERZEICHNIS TABELLENANHANG
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  • 4
    Type of Medium: Monograph available for loan
    Pages: Bände (Loseblattsammlung)
    ISBN: 9783963144509 , 3963144505
    Subsequent Title: Fortsetzung von EnEV und Energieausweise ...
    Language: German
    Branch Library: PIK Library
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  • 5
    Journal available for loan
    Journal available for loan
    München : Altop Verlag ; 2007 -
    Call number: Z 19.92410
    Type of Medium: Journal available for loan
    Pages: 30 cm
    ISSN: 1865-4266
    Former Title: Vorg. Nachhaltiges Wirtschaften in Deutschland
    Language: German
    Note: Ungezählte Beil. ab 2010: Special , Ersch. jährl. 4x
    Branch Library: IASS Library
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  • 6
    Call number: IASS 22.95033
    Type of Medium: Monograph available for loan
    Pages: 378 S , 225 mm x 135 mm
    ISBN: 3899421876 , 978-3-89942-187-3
    Series Statement: Edition panta rei
    Language: German
    Note: Zugl.: Marburg (Lahn), Univ., Habil.-Schr., 2004 u.d.T.: Gutmann, Mathias: Die Medialität des Erfahrens
    Branch Library: IASS Library
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  • 7
    Journal available for loan
    Journal available for loan
    Tübingen : Mohr Siebeck ; 1.1884 - 48.1931; N.F. 1.1932/33 - 10.1943/44(1945),3; 11.1948/49(1949) -
    Call number: ZS 22.95039
    Type of Medium: Journal available for loan
    Pages: Online-Ressource
    ISSN: 1614-0974 , 0015-2218 , 0015-2218
    Language: German , English
    Note: N.F. entfällt ab 57.2000. - Volltext auch als Teil einer Datenbank verfügbar , Ersch. ab 2000 in engl. Sprache mit dt. Hauptsacht.
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  • 8
    Call number: 3/S 07.0034(2016)
    In: Annual report
    Type of Medium: Monograph available for loan
    Pages: 51 Seiten
    ISSN: 1865-6439 , 1865-6447
    Parallel Title: Erscheint auch als Annual report ... / Helmholtz Association of German Research Centres
    Language: English
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  • 9
    Monograph available for loan
    Monograph available for loan
    Stuttgart : Schweizerbart Science Publishers ; Volume 1, number 1 (1978)-
    Call number: M 18.91571
    Type of Medium: Monograph available for loan
    Pages: 134 Seiten
    ISSN: 2363-7196
    Series Statement: Global tectonics and metallogeny : special issue Vol. 10/2-4
    Classification:
    Tectonics
    Parallel Title: Erscheint auch als Global tectonics and metallogeny
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 10
    Call number: S 90.0066(162,1)
    In: Geologisches Jahrbuch / A
    Type of Medium: Series available for loan
    Pages: 261 Seiten , Ill., 1 DVD-ROM (12 cm) und 1 Tafel-Beil. ([2] S.)
    ISBN: 9783510968534
    Series Statement: Geologisches Jahrbuch 162
    Classification:
    Engineering Geophysics
    Language: German
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 11
    Call number: Z 06.0500
    Type of Medium: Journal available for loan
    Pages: 30 cm
    ISSN: 1824-7741
    Former Title: Vorgänger Geologisch-paläontologische Mitteilungen, Innsbruck
    Language: German , English
    Note: Ersch. unregelmäßig , Beiträge teilweise in Englisch
    Branch Library: GFZ Library
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  • 12
  • 13
    Monograph available for loan
    Monograph available for loan
    Garmisch-Partenkirchen : Institut für atmosphärische Umweltforschung der Fraunhofer- Gesellschaft
    Call number: MOP 44829 / Mitte
    Type of Medium: Monograph available for loan
    Pages: 25 S. , graph. Darst.
    Language: English
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 14
    Call number: IASS 15.89494
    Type of Medium: Monograph available for loan
    Pages: Losebl.-Ausg.
    Edition: Stand: Oktober 2010
    ISBN: 9783768501828
    Language: German
    Branch Library: IASS Library
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  • 15
    Monograph available for loan
    Monograph available for loan
    [Edgecumbe, N.Z.] : A. Muller
    Call number: M 15.89146
    Description / Table of Contents: An account of the results of the 2 March 1987 earthquake in the eastern Bay of Plenty and the aftermath's effects on the people and places on the Rangitaiki Plains
    Type of Medium: Monograph available for loan
    Pages: 223 S., , Ill.
    Language: English
    Branch Library: GFZ Library
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  • 16
    Call number: MOP 19538/1d-6d
    Type of Medium: Monograph available for loan
    Pages: 111 S.
    ISSN: 0486-2287
    Language: Russian
    Note: In kyrill. Schr.
    Location: MOP - must be ordered
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  • 17
    Monograph available for loan
    Monograph available for loan
    Madrid : Secc
    Call number: PIK N 456-17-90913
    Type of Medium: Monograph available for loan
    Pages: 536 Seiten
    Series Statement: Ministerio de Transportes Turismo Y Comunicaciones : Publicación Serie A 114
    Parallel Title: 1,1=6; 2,1=13 von Publicaciones / D / Ministerio del Aire, Subsecretaria de Aviación Civil, Servicio Meteorológico Nacional
    Language: Spanish
    Location: A 18 - must be ordered
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  • 18
    Call number: PIK N 453-17-91096
    Type of Medium: Monograph available for loan
    Pages: 50 Seiten , Illustrationen, Diagramme
    Language: German
    Location: A 18 - must be ordered
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  • 19
    Monograph available for loan
    Monograph available for loan
    London : Penguin Books
    Type of Medium: Monograph available for loan
    ISBN: 9780141985206
    Language: English
    Branch Library: IASS Library
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  • 20
    Monograph non-lending collection
    Monograph non-lending collection
    Leiden : Nijhoff ; 1.2009 -
    Call number: IASS 17.92082
    Type of Medium: Monograph non-lending collection
    ISSN: 1876-8814
    Language: English
    Branch Library: IASS Library
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  • 21
    Monograph available for loan
    Monograph available for loan
    Leningrad : Gidrometeorolog. Izd.
    Call number: MOP 33767
    Type of Medium: Monograph available for loan
    Pages: 663 S.
    Language: Russian
    Note: In kyrill. Schr., russ.
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 22
    Call number: AWI A3-20-93434
    In: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin, Band XXXII, Heft 1
    Type of Medium: Series available for loan
    Pages: 121 Seiten , Illustrationen
    Series Statement: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin 32,1
    Language: German
    Note: Zugleich: Dissertation, Freie Unversität Berlin, [ca. 1963] , INHALTSVERZEICHNIS PROBLEMSTELLUNG UND ZIELSETZUNG 1. BEMERKUNGEN ZUM BEOBACHTUNGSGELÄNDE UND ZUM BEOBACHTUNGSMATERIAL 1.1 Das Beobachtungsgelände 1.2 Das Beobachtungsmaterial 2. HOMOGENITÄTSBETRACHTUNGEN 2.1 Temperatur 2.2 Niederschlag 2.3 Wind 2.4 Sonnenschein und Bewölkung 3. TEMPERATURVERHÄLTNISSE 3.1 Monats- und Jahreswerte 3.2 Tageswerte 3.3 Pentadenwerte 3.4 Häufigkeitsbetrachtungen 3.5 Interdiurne Veränderlichkeit 3.6 Der tägliche Gang 3.7 Vorkommen bestimmter Schwellenwerte 3.71 Frost- und Eistage 3.72 Sommer- und Tropentage 4. DER WASSERGEHALT DER LUFT 4.1 Monats- und Jahreswerte 4.2 Tageswerte 4.3 Häufigkeitsbetrachtungen 4.4 Interdiurne Veränderlichkeit 4.5 Der tägliche Gang 5. BEWÖLKUNGSVERHÄLTNISSE 5.1 Monats- und Jahreswerte 5.2 Tageswerte 5.3 Häufigkeitsbetrachtungen 5.4 Der tägliche Gang 5.5 Heitere und trübe Tage 5.6 Nebel 6. SONNENSCHEIN 6.1 Monats- und Jahreswerte 6.2 Tageswerte 6.3 Der tägliche Gang 7. NIEDERSCHLAGSVERHÄLTNISSE 7.1 Monats- und Jahreswerte 7.2 Niederschlagsbereitschaft 7.3 Tageswerte 7.4 Der tägliche Gang 7.5 Häufigkeitsbetrachtungen 7.6 Niederschlags- und Trockenperioden 7.7 Niederschlag und Wind· 7.8 Schneeverhältnisse 7.81 Schneefall und Schneedecke 7.82 Schneehöhe 7.9 Gewitter 8. WINDVERHÄLTNISSE 8.1 Windrichtung 8.2 Windgeschwindigkeit 8.21 Der jährliche Gang 8.22 Häufigkeitsbetrachtungen 8.23 Sturmtage und Windstillen 8.24 Der tägliche Gang 9.ZUSAMMENFASSUNG VERZEICHNIS DER TEXTTABELLEN VERZEICHNIS DER ABBILDUNGEN LITERATURVERZEICHNIS TABELLENANHANG
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  • 23
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters B 294 (1992), S. 466-478 
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 24
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters B 317 (1993), S. 474-484 
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 25
    Publication Date: 2024-02-01
    Description: The Distributed System of Scientific Collections (DiSSCo) is a pan-European Research \nInfrastructure (RI) initiative. DiSSCo aims to bring together natural science collections from \n175 museums, botanical gardens, universities and research institutes across 23 countries \nin a distributed infrastructure that makes these collections physically and digitally open and \naccessible for all forms of research and innovation. DiSSCo RI entered the ESFRI \nroadmap in 2018 and successfully concluded its Preparatory Phase in early 2023. The RI \nis now transitioning towards the constitution of its legal entity (an ERIC) and the start of its \nscaled-up construction (implementation) programme. This publication is an abridged \nversion of the successful grant proposal for the DiSSCo Transition Project which has the \ngoal of ensuring the seamless transition of the DiSSCo RI from its Preparatory Phase to \nthe Construction Phase (expected to start in 2025). In this transition period, the Project will \naddress five objectives building on the outcomes of the Preparatory Phase project: \n1) Advance the DiSSCo ERIC process and complete its policy framework, ensuring the \nsmooth early-phase Implementation of DISSCo; \n2) Engage & support DiSSCo National Nodes to strengthen national commitments; \n3) Advance the development of core e-services to avoid the accumulation of technical debt \nbefore the start of the Implementation Phase; \n4) Continue international collaboration on standards & best practices needed for the \nDiSSCo service provision; and \n5) Continue supporting DiSSCo RI interim governance bodies and transition them to the \nDiSSCo ERIC formal governance. \nThe Project\xe2\x80\x99s impact will be measured against the increase in the RI\'s overall \nImplementation Readiness Level (IRL). More specifically, we will monitor its impact towards \nreaching the required level of maturity in four of the five dimensions of the IRL that can \nbenefit from further developments. These include the organisational, financial, \ntechnological and data readiness levels.
    Keywords: natural science collections ; natural history collections ; research infrastructure ; global ; natural science ; digitisation ; data standards ; Distributed System of Scientific Collections ; DiSSCo ; Digital Specimen Architecture ; FAIR Data Ecosystem ; FAIR digital objects
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 26
    Publication Date: 2024-02-01
    Description: Molecular systematic studies of the anthozoan class Octocorallia have revealed widespread incongruence between phylogenetic relationships and taxonomic classification at all levels of the Linnean hierarchy. Among the soft coral taxa in order Malacalcyonacea, the family Alcyoniidae and its type genus Alcyonium have both been recognised to be highly polyphyletic. A recent family-level revision of Octocorallia established a number of new families for genera formerly considered to belong to Alcyoniidae, but revision of Alcyonium is not yet complete. Previous molecular studies have supported the placement of Alcyonium verseveldti (Benayahu, 1982) in family Cladiellidae rather than Alcyoniidae, phylogenetically distinct from the other three genera in that family. Here we describe a new genus, Ofwegenum gen. nov. to accommodate O. verseveldti comb. nov. and three new species of that genus, O. coronalucis sp. nov., O. kloogi sp. nov., and O. colli sp. nov., bringing the total number of species in this genus to four. Ofwegenum gen. nov. is a rarely encountered genus so far known from only a few locations spanning the Indian and western Pacific Oceans. We present the morphological characters of each species and use molecular data from both DNA barcoding and target-enrichment of conserved elements to explore species boundaries and phylogenetic relationships within the genus.
    Keywords: DNA barcoding ; molecular phylogeny ; new combination ; northern Red Sea ; Ofwegenum gen. nov. ; Oman ; R\xc3\xa9union ; sclerites ; target-enrichment ; taxonomy ; ultraconserved elements
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 27
    Publication Date: 2024-02-15
    Description: Multi-locus and phylogenomic studies have clarified the taxonomic limits and \nhigher-level relationships among rails (Rallidae). A recently proposed classification of rails by \nKirchman et al. (2021) listed nine tribes. The names of three of these (Gymnocrecini, \nAmaurornithini and Pardirallini) were introduced by Livezey (1998), but these names do not \nmeet the requirements of the ICZN Code (1999) and are therefore unavailable. We formally \ndescribe these taxa and make the names available for nomenclatural purposes. In addition, we \nclarify the apparent incongruence among recent phylogenetic studies in the generic (and tribal) \nplacement of Zapornia akool.
    Keywords: Gruiformes ; Rallidae ; Amaurornis ; Gymnocrex ; Pardirallus ; Zapornia akool ; phylogeny ; new tribe
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 28
    Publication Date: 2024-02-15
    Description: The macroevolutionary processes that have shaped biodiversity across the temperate realm remain poorly understood and may have resulted from evolutionary dynamics related to diversification rates, dispersal rates, and colonization times, closely coupled with Cenozoic cli-mate change. We integrated phylogenomic, environmental ordination, and macroevolutionary analyses for the cosmopolitan angiosperm family Rhamnaceae to disentangle the evolutionary processes that have contributed to high species diversity within and across temperate biomes. Our results show independent colonization of environmentally similar but geographically separated temperate regions mainly during the Oligocene, consistent with the global expansion of temperate biomes. High global, regional, and local temperate diversity was the result of high in situ diversification rates, rather than high immigration rates or accumulation time, except for Southern China, which was colonized much earlier than the other regions. The relatively common lineage dispersals out of temperate hotspots highlight strong source-sink dynamics across the cosmopolitan distribution of Rhamnaceae. The proliferation of temperate environments since the Oligocene may have provided the ecological opportunity for rapid in situ diversification of Rhamnaceae across the temperate realm. Our study illustrates the importance of high in situ diversification rates for the establishment of modern temperate biomes and biodiversity hotspots across spatial scales.
    Keywords: biodiversity hotspot ; macroevolution ; Mediterranean-typeecosystem ; niche conservatism ; phylogenomics ; Rhamnaceae ; speciesrichness ; time-for-speciation
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 29
    facet.materialart.
    Unknown
    INGV
    Publication Date: 2024-02-12
    Description: Exist­-fdsn-­station is an open source software that implements the standard fdsnws/station web service, integrating the application into a native XML database containing seismic stations metadata in the StationXML file format. Through its HTTP Application Programming Interface, extended with the PUT method for writing, this software can be used as a RESTful microservice. The software is publicly available and licensed under a General Public License. This manual describes all the operational phases, from installation to distribution in a production environment, for using exist-­fdsn-­station to store a set of StationXML files and exposing them efficiently with a standard fdsnws/station webservice.
    Description: Published
    Description: 1-28
    Description: OST5 Verso un nuovo Monitoraggio
    Description: N/A or not JCR
    Keywords: FDSN Station webservice ; XML based database ; 04.06. Seismology ; 05.02. Data dissemination
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 30
    Publication Date: 2024-02-12
    Description: Nel 2018 è stato avviato il progetto FOCUS - Fiber Optic Cable Use For Seafloor Studies Of Earthquake - coordinato da Marc-André Gutscher del Laboratoire Géosciences Océan dell’Università di Brest, in Francia. Questo progetto indaga la sismicità e la struttura crostale del Mar Ionio attraverso l’analisi e l’interpretazione di dati raccolti da strumentazione sottomarina e da reti di monitoraggio disponibili o appositamente installate nelle zone di costa. In tale contesto, l’Osservatorio Nazionale Terremoti (ONT) e l’Osservatorio Etneo (OE), entrambe Sezioni dell’Istituto Nazionale di Geofisica e Vulcanologia (INGV), e il Laboratorio di Sismologia dell'Università della Calabria (UniCal), hanno contribuito al progetto con l’installazione di una rete sismica temporanea lungo la costa ionica calabro-siciliana a integrazione della rete permanente presente nell’area dello Stretto di Messina. La rete temporanea, costituita da 13 stazioni, ha acquisito dal mese di dicembre 2021 al mese di giugno 2023. Nel gennaio 2022, i partner internazionali del progetto FOCUS hanno installato una rete temporanea di sismometri OBS e sensori di pressione per fondali marini. La grande quantità di dati raccolta e la loro integrazione, consentirà di migliorare il monitoraggio sismico e le conoscenze relative alla struttura terrestre dell’area con particolare attenzione alle strutture sismogenetiche con un dettaglio mai raggiunto fino a ora. Tutte le istituzioni coinvolte in FOCUS collaborano per l’acquisizione e l’elaborazione dei dati, l’imaging dell’interno della Terra attraverso l’utilizzo di tecniche avanzate, l’interpretazione e la modellazione dei dati. Il presente lavoro descrive la progettazione, la realizzazione e la gestione della rete temporanea a terra definita FXland, fornendo indicazioni relative sul suo generale funzionamento e sulle caratteristiche del dataset acquisito.
    Description: Published
    Description: 1-26
    Description: OST1 Alla ricerca dei Motori Geodinamici
    Description: OST3 Vicino alla faglia
    Description: N/A or not JCR
    Keywords: Progetto FOCUS ; Reti sismiche temporanee ; Sismicità ; FOCUS project ; Temporary seismic networks ; Seismicity ; 04.06. Seismology ; 05.04. Instrumentation and techniques of general interest
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 31
    Publication Date: 2024-02-12
    Description: Aim: Species distribution models (SDMs) are essential tools in ecology and conservation. However, the scarcity of visual sightings of marine mammals in remote polar areas hinders the effective application of SDMs there. Passive acoustic monitoring (PAM) data provide year-round information and overcome foul weather limitations faced by visual surveys. However, the use of PAM data in SDMs has been sparse so far. Here, we use PAM-based SDMs to investigate the spatiotemporal distribution of the critically endangered Antarctic blue whale in the Weddell Sea. Location: The Weddell Sea. Methods: We used presence-only dynamic SDMs employing visual sightings and PAM detections in independent models. We compared the two independent models with a third combined model that integrated both visual and PAM data, aiming at leveraging the advantages of each data type: the extensive spatial extent of visual data and the broader temporal/environmental range of PAM data. Results: Visual and PAM data prove complementary, as indicated by a low spatial overlap between daily predictions and the low predictability of each model at detections of other data types. Combined data models reproduced suitable habitats as given by both independent models. Visual data models indicate areas close to the sea ice edge (SIE) and with low-to-moderate sea ice concentrations (SIC) as suitable, while PAM data models identified suitable habitats at a broader range of distances to SIE and relatively higher SIC. Main Conclusions: The results demonstrate the potential of PAM data to predict year-round marine mammal habitat suitability at large spatial scales. We provide reasons for discrepancies between SDMs based on either data type and give methodological recommendations on using PAM data in SDMs. Combining visual and PAM data in future SDMs is promising for studying vocalized animals, particularly when using recent advances in integrated distribution modelling methods.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 32
    Publication Date: 2024-02-12
    Description: Many of the global challenges that confront humanity are interlinked in a dynamic complex network, with multiple feedback loops, nonlinear interactions and interdependencies that make it difficult, if not impossible, to consider individual threats in isolation. These challenges are mainly dealt with, however, by considering individual threats in isolation (at least in political terms). The mitigation of dual climate and biodiversity threats, for example, is linked to a univariate 1.5°C global warming boundary and a global area conservation target of 30% by 2030. The situation has been somewhat improved by efforts to account for interactions through multidimensional target setting, adaptive and open management and market-based decision pathways. But the fundamental problem still remains—that complex systems such as those formed by the network of global threats have emergent properties that are more than the sum of their parts. We must learn how to deal with or live with these properties if we are to find effective ways to cope with the threats, individually and collectively. Here, we argue that recent progresses in complex systems research and related fields have enhanced our ability to analyse and model such entwined systems to the extent that it offers the promise of a new approach to sustainability. We discuss how this may be achieved, both in theory and in practice, and how human cultural factors play an important but neglected role that could prove vital to achieving success. Read the free Plain Language Summary for this article on the Journal blog.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 33
    Publication Date: 2024-02-13
    Description: In this work, we analyze 12 meteorological events that occurred in the Mediterranean Sea during the period November 2011-November 2021 from a seismic point of view. In particular, we consider 8 Medicanes and 4 more common storms. Each of these events, in spite of the marked differences between them, caused heavy rainfall, strong wind gusts and violent storm surge with significant wave heights usually 〉3 m. We deal with the relationships between these meteorological events and the features of microseism (the most continuous and widespread seismic signal on Earth) in terms of spectral content, space-time variation of the amplitude and source locations tracked employing two different methods (amplitude decay-based grid search and array techniques). By comparing the positions of the microseism sources with the areas of significant storm surges, we observe that the microseism locations align with the actual locations of the storm surges for 10 out of 12 events analyzed (two Medicanes present very low intensity in terms of meteorological parameters and the microseism amplitude does not show significant variations during these two events). We also perform two analyses that allowed us to obtain both the seismic signature of these events, by using a method that exploits the coherence of continuous seismic noise, and their strength from a seismic point of view, called Microseism Reduced Amplitude. In addition, by integrating the results obtained from these two methods, we are able to "seismically" distinguish Medicanes and common storms. Consequently, we demonstrate the possibility of creating a novel monitoring system for Mediterranean meteorological events by incorporating microseism information alongside with other commonly employed techniques for studying meteorological phenomena. The integration of microseism with the data provided by routinely used techniques in sea state monitoring (e.g., wave buoy and HF radar) has the potential to offer valuable insights into the examination of historical extreme weather events within the context of climate change.
    Description: Published
    Description: 169989
    Description: OSA4: Ambiente marino, fascia costiera ed Oceanografia operativa
    Description: JCR Journal
    Keywords: Climate change ; Common storms ; Hindcast maps ; Medicanes ; Mediterranean Sea ; Microseism ; Monitoring sea state ; Wave buoys
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 34
    Publication Date: 2024-02-13
    Description: In this work, we study a Mediterranean cyclone, Helios, which took place during 9–11 February 2023 in the southeastern part of Sicily and Malta, by a multiparametric approach combining microseism results with sea state and meteorological data provided by wavemeter buoy, HF radar, hindcast maps and satellite SEVIRI images. The sub-tropical system Helios caused heavy rainfall, strong wind gusts and violent storm surges with significant wave heights greater than 5 m. We deal with the relationships between such a system and the features of microseism (the most continuous and ubiquitous seismic signal on Earth) in terms of spectral content, space–time variation of the amplitude and source locations tracked by means of two methods (amplitude-based grid search and array techniques). By comparing the location of the microseism sources and the area affected by significant storm surges derived from sea state data, we note that the microseism location results are in agreement with the real position of the storm surges. In addition, we are able to obtain the seismic signature of Helios using a method that exploits the coherence of continuous seismic noise. Hence, we show how an innovative monitoring system of the Mediterranean cyclones can be designed by integrating microseism information with other techniques routinely used to study meteorological phenomena.
    Description: Published
    Description: 1-20
    Description: OSA4: Ambiente marino, fascia costiera ed Oceanografia operativa
    Description: JCR Journal
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  • 35
    Publication Date: 2024-02-14
    Description: La talla mínima legal de captura (TMLC) en la pesquería de langosta en Cuba es de 76 mm de largo del cefalotórax (LC) y data de 2007. Mediante métodos basados en la estructura de tallas de las capturas, se evaluó que con una TMLC de 82 mm LC en todas las regiones de pesca, se esperan incrementos a nivel nacional alrededor de 3, 9 y 11 % de captura, biomasa y potencial reproductor respectivamente, en relación con los valores promedio de estas variables durante el período 2017- 2021. La disminución inmediata de la captura por aumentar la TMLC en 6 mm (de 76-82 mm LC), se debe recuperar dentro de la misma temporada de pesca, ya que el crecimiento por muda es de más de 6 mm LC y esta se produce con una frecuencia entre 3 y 4 veces durante el año. Se recomienda Incrementar la talla mínima legal de captura en la pesquería de langosta en Cuba a 82 mm LC, la cual estará más acorde con la talla de primera madurez sexual, estimada alrededor de 95 mm LC para hembras en la región suroccidental.
    Description: The minimum legal size of capture (MLSC) in the fishery for lobster in Cuba is 76 mm of cephalothorax length (CL) and dates from 2007. Using length-based models, it was evaluated that a MLSC of 82 mm CL in all fishing regions, will increase around 3, 9 and 11 % in catch, biomass and reproductive potential respectively, in relation to the average values of these variables during the 2017-2021 period. The immediate decrease in the catch due to increasing the MLSC by 6 mm (from 76 to 82 mm CL), must be recovered within the same fishing season, since the growth increment by molting is more than 6 mm CL and the molt frequency is between 3 and 4 times during the year. It is recommended to increase the minimum legal size of capture in the lobster fishery in Cuba to 82 mm CL, which will be more in line with the size at first maturity, estimated around 95 mm CL for females in the southwestern region.
    Description: Published
    Description: Refereed
    Keywords: Recursos pesqueros ; Modelos de tallas ; Biomasa ; Potencial reproductor ; Ordenación de pesquerías ; Fishery resources ; Length-based models ; Biomass ; Reproductive potential ; Fisheries management
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.18-26
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  • 36
    Publication Date: 2024-02-14
    Description: La pesca del camarón rosado (Farfantepenaeus notialis) en los golfos de Ana María y Guacanayabo, región suroriental de Cuba, se encuentra muy deprimida a un nivel de 540 t, en comparación con las 5 443 t que como promedio se obtuvieron entre 1974-1978. El descenso de las capturas no puede ser explicado solamente por el efecto de la pesca, ya que la abundancia de las especies de camarón depende de los aportes de agua dulce y nutrientes provenientes de los ríos y las precipitaciones. Se realizó una evaluación del recurso teniendo en cuenta la capacidad de almacenamiento de agua en los embalses, como una medida del represamiento de los ríos que tributan hacia ambos golfos. Se utilizó un modelo de producción con los efectos del esfuerzo pesquero y del represamiento sobre el índice de abundancia de la especie. La disminución de la abundancia hasta 1982 en Ana María y hasta 1978 en Guacanayabo puede ser explicada por la acción de la pesca principalmente, pero de ahí en adelante, el efecto del represamiento ha sido trascendental para el decrecimiento de la abundancia, a pesar de la reducción del esfuerzo pesquero y del perfeccionamiento del sistema de ordenación de la pesquería. No son de esperar incrementos significativos de la captura, las cuales variarán en dependencia del esfuerzo y de las precipitaciones, que pueden favorecer de momento la disponibilidad y el reclutamiento en áreas de pesca, aunque las lluvias intensas también pudieran incrementar la mortalidad natural. Los valores probables de las capturas estarán entre 230-630 t para toda la región suroriental durante el período 2022-2026.
    Description: The pink shrimp (Farfantepenaeus notialis) fishery in the gulfs of Ana María and Guacanayabo, southeastern region of Cuba, is currently very depressed at a level of 540 t, compared to the 5 443 t that were obtained as an annual average between 1974 and 1978. The notable decrease in catches cannot be explained solely by the effect of fishing, since the abundance of shrimp species depends on the contributions of fresh water and nutrients from rivers and precipitation. An evaluation of the shrimp resource was carried out considering the water storage capacity in the built reservoirs, as a measure of the damming of the rivers that flow into both gulfs. A surplus production model was used with the effects both of the fishing effort and the damming on the abundance index of the species. The decrease in abundance up to 1982 in Ana María and up to 1978 in Guacanayabo can be explained mainly by the action of fishing, but from then on, the cumulative and permanent effect of the damming has been transcendental for the irreversible decrease in abundance, despite the reduction in fishing effort and the improvement of the fishery management system. No significant increases in catch are expected in the short term. Future catches will depend on the effort and the influence of rainfall, which might favor the availability and recruitment of the species in fishing areas. The probable values of the catches could be between 230 and 630 t for the entire southeastern region during 2022-2026 period.
    Description: Published
    Description: Refereed
    Keywords: Recursos pesqueros ; Puntos de referencia ; Pronóstico de capturas ; Fishery resources ; Reference points ; Catch forecast
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.27-35
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  • 37
    Publication Date: 2024-02-14
    Description: Heavy metals are naturally omnipresent in aquatic systems. Excess amounts of heavy metals can accumulate in organisms of pollution impacted systems and transfer across a food web. Analysing the food web structure and metal contents of the organisms can help unravel the pathways of biomagnification or biodilution and gain insight in trophic linkages. We measured heavy metals and other elements in mussel bank detritus and organisms of the Biesbosch reservoirs (the Netherlands) and linked those to stable isotopic signatures. The heavy metal contents (cadmium, copper, lead, and zinc) were often lowest in benthivorous, omnivorous and piscivorous species (mainly fish); whereas, phosphorus contents were lower in the autotrophs. Mussel bank detritus contained the highest amounts of heavy metals. The heavy metals were negatively correlated with \xce\xb415N values. For selenium no clear trend was observed. Furthermore, there was a negative correlation between fish length and some heavy metals. Based on all 20 analysed elemental contents, similarities between species became apparent, related to niche or habitat. This study confirms that elemental contents of species can differ between feeding guilds and/or species, which can be attributed to metabolic and physiological processes. The organisms in higher trophic levels have adaptations preventing metal accumulation, resulting in lower contents. Within the fish species biodilution occurs, as most metal contents were lowest in bigger fish. Overall, the metals did not seem to biomagnify, but biodilute in the food web. Metal analyses combined with isotopic signatures could thus provide insights in metal transfer and possible trophic linkages within a system.
    Repository Name: National Museum of Natural History, Netherlands
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  • 38
    Publication Date: 2024-02-14
    Description: The exact nature of the relationship between symbiont fauna and their hosts is often unclear, but knowing more about these \nintricate ecological interactions is vital to understand the trophic positions of host-associated fauna, and can aid in accurate \nconstructions of food-webs on coral reefs. Scleractinian corals are hosts to hundreds of symbiont taxa, including fsh and \nmany invertebrate species. Some of these associated fauna are benefcial to their coral host(s), whereas other taxa can have \ndetrimental efects, yet their impact is often difcult to determine. Coral-dwelling gall crabs (Cryptochiridae) are obligate, \noften host-specifc, symbionts of scleractinian corals but the nature of this relationship is still under debate. Three Atlantic \ngall crab species (Kroppcarcinus siderastreicola, Opecarcinus hypostegus and Troglocarcinus corallicola) and their coral \nhosts\xe2\x80\x99 tissue/mucus were collected from reefs in Guadeloupe. Stable carbon and nitrogen isotope values were measured for \n57 crabs inhabiting host coral colonies belonging to seven diferent coral species (although only 27 colonies from fve coral \nspecies were collected), alongside other potential food sources (epilithic algal matrix, plankton and particulate organic matter). The carbon and nitrogen isotope values of gall crabs relative to those of their respective coral host(s) and other possible \nfood sources showed that coral tissue/mucus was the main food source for the crabs. The results of the mixing models further \nsupported this fnding, suggesting that corals are responsible for 40\xe2\x80\x9370% of the crabs\xe2\x80\x99 diet. In T. corallicola, the isotopic \nsignature difered signifcantly between sexes, possibly caused by the high sexual dimorphism observed in this species. \nHere we showed that Atlantic gall crabs mainly dine on coral tissue and/or mucus excreted by their coral hosts, highlighting their nutritional dependence on their host. However, since coral mucus is continuously exuded by scleractinians, hence \nthe energetic or metabolic drain for corals is expected to be minimal. Gall crabs depend on their coral hosts for settlement \ncues as larvae, for habitat as adults and - highlighted by this study - for food, essential for their subsistence. This obligate \ndependence on their hosts for all parts of their life makes them extremely vulnerable to reef degradation, and underlines the \nimportance in understanding the exact nature of a relationship between symbiont and coral host.
    Keywords: Caribbean ; Coral-associated fauna ; Scleractinia ; Symbiosis ; Trophic food-web
    Repository Name: National Museum of Natural History, Netherlands
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  • 39
    Publication Date: 2024-02-14
    Description: Marine karst ecosystems exist at the land-sea interface and are characterised by underwater formations sculpted over time by \nthe action of seawater. Submerged caves and crevices of these ecosystems host a rich array of marine life of which sponges are \namong the most abundant and diverse components. In the present study, we describe elements of the sponge fauna sampled \nfrom a unique karst ecosystem at a remote island, Orchid Island, of the southeastern coast of Taiwan. The present study \nincludes several understudied sponge taxa, including sclerosponges (Acanthochaetetes wellsi, and Astrosclera willeyana) and \nseveral lithistid species from dark, shallow-water caves. Prokaryotic communities were obtained from a total of 22 demosponge species, of which 11 are potentially new to science. The tetracladinid, lithistids harboured prokaryotic communities, \nwhich clustered separately from all other sponge species, contrasting with the non-tetracladinid, lithistid Vetulina incrustans. \nThe tetracladinid, lithistids, furthermore, formed two distinct clusters with species of the Spirophorina suborder clustering \napart from those of the Astrophorina suborder. The sclerosponge A. wellsi also harboured a distinct prokaryotic community \nin terms of composition including fve unique, abundant OTUs with relatively low sequence similarities to organisms in \nGenBank. All cave sponges were enriched with SAR202 members, a group of bacteria known for their role in the degradation of recalcitrant compounds. The highest relative abundance of SAR202 was found in A. wellsi. We propose that the cave \nsponges of Orchid Island may play an as-yet uncharted role in nutrient dynamics at the land-sea interface.
    Keywords: 16S ; Composition ; Porifera ; Prokaryotes ; Taiwan
    Repository Name: National Museum of Natural History, Netherlands
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  • 40
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    Instituto Nacional de Investigacion y Desarrollo Pesquero (INIDEP) | Mar del Plata, Argentina
    Publication Date: 2024-02-15
    Description: The book introduces the reader to the fascinating marine life of the Mar del Plata sublittoral marine ecosystems. The rocky outcrops of the region, considered of great environmental and biogeographic interest, extend several miles seawards and constitute the largest hard substrates in the zone. Although in nautical charts the area is referred to as continuous, it is, in fact, a series of isolated outcrops with different physiognomy and faunal composition well known by fishermen and sports divers who refer to them as restingas and bancos. Found there, besides, are the "James Clunies" shipwreck remains and a submarine park formed with the sinking of the vessel "Cristo Rey" that constitute an interesting site for divers. In the text information about the marine organisms that inhabit the area is provided. The clear descriptions of flora and fauna are illustrated with underwater photographs that allow to recognize them. The biologic and ecologic information provided leads to a better understanding of marine life and the ways marine organisms interact with each other and with the physical environment they are surrounded by.
    Description: El libro introduce al lector en la fascinante vida marina que caracteriza los ecosistemas sublitorales de Mar del Plata. Los afloramientos rocosos de la región, considerada de gran interés ambiental y biogeográfico, se internan varias millas mar adentro y constituyen los sustratos duros más extensos de la zona. A pesar de que en las cartas náuticas se indica al área como una única zona rocosa, se trata, en realidad, de un grupo de afloramientos aislados con distintas fisonomías y composición faunística bien conocidos por los pescadores y buzos deportivos que se refieren a ellos como restingas y bancos. Allí se encuentran, además, los restos del naufragio del buque inglés""James Clunies" y un parque submarino que se formó con el hundimiento del dragaminas "Cristo Rey" que constituyen sitios de gran interés para los buzos. En el texto se brinda información sobre los organismos marinos que habitan el área. Las claras descripciones de la flora y fauna se ilustran con fotografías subacuáticas que permiten reconocerlos. La información biológica y ecológica que se proporciona facilita una mejor comprensión de la vida marina y de las formas en que los organismos se relacionan entre sí y con el medio físico que los rodea.
    Description: Published
    Description: Refereed
    Keywords: invertebrados marinos ; algas marinas ; salinidad ; temperatura ; comunidades acuáticas ; alimentación ; ASFA_2015::M::Marine invertebrates ; ASFA_2015::S::Seaweeds ; ASFA_2015::S::Salinity ; ASFA_2015::T::Temperature ; ASFA_2015::A::Aquatic communities ; ASFA_2015::F::Feeding
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 46 p.
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  • 41
    facet.materialart.
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    Instituto Nacional de Investigacion y Desarrollo Pesquero (INIDEP) | Mar del Plata, Argentina
    Publication Date: 2024-02-15
    Description: The book introduces the reader to the fascinating marine life of the Mar del Plata sublittoral marine ecosystems. The rocky outcrops of the region, considered of great environmental and biogeographic interest, extend several miles seawards and constitute the largest hard substrates in the zone. Although in nautical charts the area is referred to as continuous, it is, in fact, a series of isolated outcrops with different physiognomy and faunal composition well known by fishermen and sports divers who refer to them as restingas and bancos. Found there, besides, are the "James Clunies" shipwreck remains and a submarine park formed with the sinking of the vessels "Cristo Rey" and "Khronometer" that constitute an interesting site for divers. In the text information about the marine organisms that inhabit the area is provided. The clear descriptions of flora and fauna are illustrated with underwater photographs that allow to recognize them. The biologic and ecologic information provided leads to a better understanding of marine life and the ways marine organisms interact with each other and with the physical environment they are surrounded by.
    Description: El libro introduce al lector en la fascinante vida marina que caracteriza los ecosistemas sublitorales de Mar del Plata. Los afloramientos rocosos de la región, considerada de gran interés ambiental y biogeográfico, se internan varias millas mar adentro y constituyen los sustratos duros más extensos de la zona. A pesar de que en las cartas náuticas se indica al área como una única zona rocosa, se trata, en realidad, de un grupo de afloramientos aislados con distintas fisonomías y composición faunística bien conocidos por los pescadores y buzos deportivos que se refieren a ellos como restingas y bancos. Allí se encuentran, además, los restos del naufragio del buque inglés "James Clunies" y un parque submarino que se formó con el hundimiento del dragaminas "Cristo Rey" y el buque ruso "Khronometer" que constituyen sitios de gran interés para los buzos. En el texto se brinda información sobre los organismos marinos que habitan el área. Las claras descripciones de la flora y fauna se ilustran con fotografías subacuáticas que permiten reconocerlos. La información biológica y ecológica que se proporciona facilita una mejor comprensión de la vida marina y de las formas en que los organismos se relacionan entre sí y con el medio físico que los rodea.
    Description: Published
    Description: Refereed
    Keywords: invertebrados marinos ; algas marinas ; salinidad ; temperatura ; comunidades acuáticas ; alimentación ; ASFA_2015::M::Marine invertebrates ; ASFA_2015::S::Seaweeds ; ASFA_2015::S::Salinity ; ASFA_2015::T::Temperature ; ASFA_2015::A::Aquatic communities ; ASFA_2015::F::Feeding
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 52 p.
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  • 42
    facet.materialart.
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    Instituto Nacional de Investigacion y Desarrollo Pesquero (INIDEP) | Mar del Plata, Argentina
    Publication Date: 2024-02-15
    Description: Con motivo de la renovación de la flota del Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), surgió inmediatamente qué nombre se pondría al nuevo barco que se estaba construyendo en el Astillero Armón de Vigo, España, desde marzo de 2016. El nombre a un barco es como darle un nombre al hijo, donde los padres procuran homenajearlo con una designación significativa. En general los nombres de buques científicos se refieren a lugares geográficos, nombres en latín de organismos marinos interesantes y el nombre de algún investigador relacionado con las ciencias marinas a quien se desea recordar. En septiembre de 2016 la Dirección del INIDEP convocó a todo el personal para que propusieran posibles nombres para el nuevo barco. Posteriormente se hizo una votación sobre la lista presentada y resultó elegido el nombre "Víctor Angelescu". Las siguientes líneas se proponen mostrar quien fue el Dr. Víctor Angelescu a través de su actuación, sus trabajos, su personalidad y la opinión de quienes tuvimos el placer de conocerlo personalmente.
    Description: Contribución INIDEP 2182
    Description: Published
    Description: Refereed
    Keywords: biografías ; bibliografías personales ; biología pesquera ; historia ; ASFA_2015::B::Biographies ; ASFA_2015::P::Personal bibliographies ; ASFA_2015::F::Fisheries biology ; History
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 48 p.
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  • 43
    Publication Date: 2024-02-15
    Description: The southeast of Mexico City is one of the last areas of environmental importance for the region. However, rapid urban expansion has led to a runoff increase in the presence of intense rainfall. This situation is common to many peri-urban centers close to large cities, where the urbanization of previously green areas has had a direct negative influence on the hydraulic structure. This work proposes a study that combines hydrological analysis for the definition of precipitation scenarios with hydrodynamic simulations based on the current land use. Reconstructed flood scenarios show that the runoffs descending from mountainous areas flow into cemented channels with hydraulic sections and characteristics not adequate to drain specific discharges that can reach 0.90 m2/s and water depths of the order of 2 m, caused by extreme weather phenomena, determining flooding in nearby areas. Runoffs are also intensified by the presence of non-urbanized open spaces in a state of abandonment, whose soil does not favor infiltration and promotes the flooding of residential centers with water levels higher than 1 m. The results indicate an urgent need to adopt actions to reduce flooding and favor infiltration in an area of the city that is also important for aquifer recharge.
    Description: Published
    Description: 1120
    Description: OSV2: Complessità dei processi vulcanici: approcci multidisciplinari e multiparametrici
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 44
    Publication Date: 2024-02-17
    Description: Ceratopsids represent one of the most iconic groups of non-avian dinosaurs. These large quadrupedal ornithischians are well-known for their bizarre cranial ornamentations, which are distinctive among different ceratopsids. However, only very little data exist on ceratopsid osteohistology and growth rates. Here, we present a detailed osteohistological analysis on Triceratops horridus preserved in a relatively large bonebed from the Lance Formation (eastern Wyoming, USA) as well as additional Triceratops cf. prorsus specimens from Canada. Deciphering the bone microstructure of this iconic dinosaur allows to better understand the growth and development of ceratopsids. The Triceratops limb elements show a distinct pattern of slower growing parallel-fibred and faster growing woven-parallel bone tissue that serves as basis for the definition of histologic ontogenetic stages (HOS). Lower (i.e., younger) HOS correspond to woven-parallel tissue while higher (i.e., older) HOS correspond to parallel-fibred tissue. The intraskeletal variation in histology is best explained through the Three-Front Model, indicating significant differences in cortical thickness between different limb bones. The Triceratops primary growth record is poorly expressed, and the few growth marks preserved show irregular spacing inconsistent with expected growth patterns. The HOS scheme provides seven stages that correspond to biological age classes and that show a correlation with body size. Our analysis suggests that the taxonomic ambiguity between Torosaurus and Triceratops cannot be solved based purely on histological data, but requires additional taphonomic, taxonomic and histological analyses. This study expands the current ceratopsian histological database and helps to better understand ceratopsid growth patterns.
    Keywords: Ceratopsian ; Ontogeny ; Skeletochronology ; Bone remodelling ; Histovariability
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 45
    Publication Date: 2024-02-18
    Description: The first records of subfamily Euthyadinae K. Viets, 1931 are presented from China. \nTwo species are reported from Anhui Province P. R. China, i.e. Trichothyas (Lundbladia) \nfeuerborni (K. Viets, 1929) and Trichothyas (Neothyas) zhangae Li, Jin & Guo sp. nov., \nwere discovered. Through observation with an optical microscope and SEM (scanning \nelectron microscope), detailed structures are illustrated and photographed. Meanwhile, \ndetailed statistics on Trichothyas-like species were conducted and the taxonomical \nproblems of this group are discussed.
    Keywords: water mites\xcd\xbe new record\xcd\xbe new species\xcd\xbe Trichothyas\xcd\xbe SEM
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 46
    Publication Date: 2024-02-19
    Description: The long-term dynamics of microbial communities across geographic, hydrographic, and biogeochemical gradients in the Arctic Ocean are largely unknown. To address this, we annually sampled polar, mixed, and Atlantic water masses of the Fram Strait (2015–2019; 5–100 m depth) to assess microbiome composition, substrate concentrations, and oceanographic parameters. Longitude and water depth were the major determinants (~30%) of microbial community variability. Bacterial alpha diversity was highest in lower-photic polar waters. Community composition shifted from west to east, with the prevalence of, for example, Dadabacteriales and Thiotrichales in Arctic- and Atlantic-influenced waters, respectively. Concentrations of dissolved organic carbon peaked in the western, compared to carbohydrates in the chlorophyll-maximum of eastern Fram Strait. Interannual differences due to the time of sampling, which varied between early (June 2016/2018) and late (September 2019) phytoplankton bloom stages, illustrated that phytoplankton composition and resulting availability of labile substrates influence bacterial dynamics. We identified 10 species clusters with stable environmental correlations, representing signature populations of distinct ecosystem states. In context with published metagenomic evidence, our microbial-biogeochemical inventory of a key Arctic region establishes a benchmark to assess ecosystem dynamics and the imprint of climate change.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 47
    Publication Date: 2024-02-19
    Description: Microbes are the fundamental drivers of Earth’s biogeochemical cycles. Their enormous taxonomic, functional and metabolic diversity are of essential importance for ecosystem functioning − from cellular to community scales, over time and space. Among the multitude of microbial metabolisms in the oceans, polysaccharide degradation is one key process, featuring distinct substrate niches and bacteria-algae interactions. Nonetheless, many aspects regarding the distribution of polysaccharide-degrading taxa and their genetic regulation remain open. One central question is how hydrolytic abilities, and the diversity of metabolic functions in general, affect microbiome assembly over time. Studying temporal variability is especially important in vulnerable and changing systems such as the polar oceans, where the climate crisis exerts substantial pressure on biological communities. This Habilitation summarizes my research on bacterial polysaccharide degradation, intraspecific diversity, and microbiome seasonality in the Arctic Ocean. The enclosed studies present interdisciplinary insights into the biogeography, identity, genetic repertoire, and regulatory dynamics of polysaccharide degraders on cellular, microhabitat and ocean-wide scales. Experimental incubations revealed distinct “hydrolytic community fingerprints” in the Atlantic, Pacific, and Southern Oceans. Furthermore, studying the genetic machinery and cellular regulation under both simple and complex substrate conditions, including dissolved and particulate polysaccharides, illuminated the microscale underpinnings of larger community dynamics. This integrated molecular and culture-based evidence contributes to a conceptual perspective on polysaccharide utilization in contrasting marine systems. The establishment of model organisms was essential for studying genetic regulation and intraspecific diversity; addressing hydrolytic capacities and other traits including siderophore production, aromatics degradation, and metabolite secretion – mediators of central element cycles and chemical ecology. Connecting genotypes to niches furthermore contributed to broader eco-evolutionary concepts on species delineation and population assembly. Finally, my research characterized microbial communities over seasonal and environmental gradients in the Arctic Ocean. Time-series observations via autonomous devices revealed community dynamics over polar day and night, and across different sea-ice and polar water regimes. This microbial inventory in the environmental context establishes a baseline of Arctic microbial ecology, and allows benchmarking future ecosystem shifts. Overall, the presented research contributes important conclusions for the understanding of microbial diversity and biogeochemical functions in cellular, spatial and temporal dimensions, underlining the relevance of microbes for ecosystem functioning in the current and future ocean.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Thesis , notRev
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  • 48
    Publication Date: 2024-02-07
    Description: This historical overview uses a political ecology approach to examine agricultural change over time in Northwest Cambodia. It focuses on key historical periods, actors, and processes that continue to shape power, land, and farming relations in the region, emphasizing the relevance of this history for contemporary investments in agricultural extension services and research as part of the Zero Hunger by 2030 policy agenda for achieving the Sustainable Development Goals (SDG). Agricultural extension projects need to engage critically with historically complex and dynamic power, land, and farming relations–not only as the basis of social relations but as central to understanding the contemporary manifestation of farmer decision making and practice. Initiatives such as the SDGs replicate long histories of externally driven power-relations that orient benefits from changed practices towards elites in urban centers or distant global actors. Efforts to realize zero hunger by 2030 are endangered by neglect for the path-dependency of power-land-farming relations, which stretch from the past into the present to structure farmer decision making and practices.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 49
    Publication Date: 2024-02-07
    Description: Peatland soils are projected to respond to rising global temperatures with an increase in microbial respiration rates. At the same time, nutrients that were previously bound in undecomposed organic matter will increasingly become available to the decomposer microbial communities. The pathway and magnitude of response in respiration rates to a changing nutrient status remains an open question, especially given that these ecosystems are typically limited in nutrients like nitrogen. In my ongoing Master thesis, I investigate the effects of adding nitrate and ammonium to incubated peat samples from Siikaneva bog in boreal Finland. While the site itself is not affected by permafrost, this study provides an analogue for the future of peatlands at the edge of the permafrost zone. Preliminary results from 190 days of incubation indicate that carbon dioxide production was reduced by ammonia additions. Data on methane production were less conclusive, but also point to an average reduction of total C respiration. Samples from above and below the water table exhibit different trajectories, which may be an expression of different microbial communities: most prominently, a complete lack of methanogenenis in the surface samples. In summary, this implies that the peatland carbon sink is not endangered by nutrient release.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , NonPeerReviewed
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  • 50
    Publication Date: 2024-02-25
    Description: Se evaluaron el pienso Vimifos 25, importado de México, y la reducción de ración en el engorde de Clarias gariepinus. Se realizaron tres bioensayos según diseños completamente aleatorizados con tres repeticiones. En el primero, los tratamientos fueron el pienso Vimifos (25 % de proteína bruta, PB y 10,42 MJ/Kg de energía digestible, ED) y los piensos nacionales de 10 % de harina de pescado (HP) (29,2 % PB y 11,34 MJ/kg ED) y 24 % HP (33,8 % PB y 12,33 MJ/kg ED). Los resultados mostraron mejor desempeño productivo con los piensos nacionales. En el segundo se redujo el 70 % de ración diaria con el pienso Vimifos, obteniéndose una disminución de las tasas de crecimiento, sin embargo, se favoreció la eficiencia alimentaria. En el tercero se redujo la ración con el pienso de 10 % de HP, que presentó mayor nivel de proteínas respecto a Vimifos, para mantener igual requerimiento absoluto de proteínas (gramos de proteína por kilogramos de peso vivo) y no se afectó el comportamiento productivo de los animales. Los análisis económicos mostraron un efecto positivo con los piensos nacionales. Se concluye que el pienso Vimifos 25 mostró pobre desempeño productivo y económico respecto a los piensos nacionales en el engorde de Clarias gariepinus y la reducción de ración fue efectiva cuando se consideró el requerimiento absoluto de proteínas en la alimentación de los animales.
    Description: To evaluate the Vimifos 25 feed, imported from Mexico, and the reduction of ration in Clarias gariepinusfattening were the objective of this work. Three bioassays were carried out according to completely randomized designs with three repetitions. In the first case, the treatments were Vimifosfeed (25 % crude protein, CP and 10,42 MJ/Kg digestible energy, DE) and national feeds containing 10 % fishmeal (FM) (29,2 % of protein and 11,34 MJ/kg of digestible energy) and 24 % FM (33,8 % protein and 12,33 MJ/kg). The results showed better productive performance with national feeds. In the second case, 70 % of the daily ration was reduced with Vimifos feed, obtaining a decrease in growth rates; however, feed efficiency was favored. In the third case, the ration was reduced with the 10 % FM feed, which has a higher protein level than Vimifos feed, to maintain the absolute protein requirement (grams of protein per kilograms of live weight) and the productive behavior of the animals was not affected. The economic analyzes showed a positive effect with national feeds. It is concluded that the Vimifos feed showed poor productive and economic performance with respect to national feeds in Clarias gariepinus fattening and the ration reduction was effective when the absolute protein requirement was maintained in the feeding the animals.
    Description: Published
    Description: Refereed
    Keywords: Alimentación ; Bagre ; Nutrición ; Proteína ; Feeding ; Catfish ; Nutrition ; Protein
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.11-17
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  • 51
    Publication Date: 2024-02-25
    Description: Las esponjas de la familia Spongiidae constituyen un rubro exportable en Cuba desde el siglo xix. Las denominadas “esponjas de baño” tienen un alto precio en el mercado y su oferta ha disminuido por el impacto de diferentes factores naturales, y de una máxima explotación de las poblaciones silvestres. El cultivo de esponjas, además de una alternativa de producción sostenible, constituye una solución para alcanzar tallas de mercado sin afectar la biomasa silvestre, y garantiza la protección de las poblaciones naturales. Acciones de esponjicultura desarrolladas en el archipiélago de Sabana-Camagüey (ASC), centro norte de Cuba, fueron evaluadas y se describen y comparan dos variantes de cultivo: cultivo de esponjas ensartadas en líneas de monofilamento (tendales) y cultivo de esponjas libres en parcelas cercadas (corrales). Los resultados demuestran la viabilidad de ambos cultivos a partir de la regeneración de fragmentos de esponjas, con tasas máximas de crecimiento mensual de entre 1-2 cm de diámetro, y alcanzan en 12 meses un tamaño acorde con la demanda del mercado. Pasados los primeros seis meses de cultivo ocurre una disminución de la tasa de crecimiento. La calidad del sitio, la selección del método de cultivo según características del sitio, las especies en cultivo, el tamaño de los fragmentos (semillas) para siembra, y el manejo del cultivo, son factores a tener en cuenta para obtener resultados satisfactorios.
    Description: The sponges of the Spongiidae family have been an exportable item in Cuba since the 19th century. The so-called "bath sponges" have a high price in the market and their supply has decreased due to the impact of different natural factors, and the maximum exploitation of wild populations. Sponge farming, in addition to a sustainable production alternative, constitutes a solution to reach market sizes without affecting wild biomass, and guarantees the protection of natural populations. Sponge culture actions carried out in Sabana Camagüey archipelago (ASC), north-central Cuba, were evaluated and two culture variants are described and compared: the culture of sponges strung on monofilament threads (clothesline) and the culture of sponges free in fenced plots (corrals). The results demonstrate the viability of both cultures from the regeneration of sponge fragments, with maximum monthly growth rates of between 1-2 cm in diameter, and reaching a size in 12 months according to market demand. After the first six months of cultivation, a decrease in the growth rate occurs. The quality of the site, the selection of the cultivation method according to the characteristics of the site, the species under cultivation, the size of the fragments ("seeds") and the cultivation management, these are factors that must be taken into account to obtain satisfactory results.
    Description: Published
    Description: Refereed
    Keywords: Esponjas marinas ; Talla comercial ; Tasa de crecimiento en cultivo ; Marine sponges ; Commercial size ; Growth rate in culture
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.88-95
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  • 52
    Publication Date: 2024-02-25
    Description: En los gastos asociados al cultivo de microalgas, el uso de medios de cultivo como Guillard (f/2) representa entre el 30-40 % de los costos de operación y estos pueden ser disminuidos hasta siete veces mediante el uso de fertilizantes agrícolas, pues son económicos y contienen los nutrientes indispensables para el crecimiento de las microalgas. Un fertilizante que pudiera utilizarse en esta rama de la acuicultura es VIUSID agro, un promotor del crecimiento vegetal. Para ello, se evaluó el efecto del bioestimulante agrícola VIUSID agro en el crecimiento de las microalgas Dunaliella salina y Thalassiosira sp., que constituyó el objetivo del trabajo. La investigación se llevó a cabo en el laboratorio de producción de alimento vivo en el Centro de Investigaciones Pesqueras (CIP). Se evaluaron dos concentraciones diferentes de VIUSID agro: 0,5 mL y 1 mL que se añadieron a 2 000 mL de agua de mar estéril para utilizarlo como medio de cultivo y el crecimiento de las microalgas se comparó con los resultados obtenidos en el medio Guillard (f/2), utilizado como control. Se realizaron conteos diarios en un microscopio óptico con un hematocitómetro y se determinó la concentración de células por mililitro. Como resultado se obtuvo mayor crecimiento de ambas microalgas en el medio control y fue muy superior al de los tratamientos empleados. Estos resultados se deben al bajo contenido en nitrógeno del VIUSID agro y a la presencia de metales pesados en concentraciones superiores a las que pueden tolerar las microalgas estudiadas.
    Description: In the expenses associated with the cultivation of microalgae, the use of culture media such as Guillard (f/2) represents between 30-40 % of the operating costs and these can be reduced up to seven times using agricultural fertilizers, since they are cheap and contain the essential nutrients for the growth of microalgae. A fertilizer that could be used in this branch of aquaculture is VIUSID agro, a plant growth promoter. For this, the effect of the agricultural biostimulant VIUSID agro on the growth of the microalgae Dunaliella salina and Thalassiosira sp., which is the objective of our study, was evaluated. The research was carried out in the live food production laboratory at the Centro de Investigaciones Pesqueras (CIP). Two different concentrations of VIUSID agro were evaluated: 0,5 mL and 1 mL that were added to 2 000 mL of sterile seawater to be used as a culture medium and the growth of the microalgae was compared with the results obtained in the Guillard medium (f/2), used as a control. Daily counts were made under a light microscope with a Neubauer grid-equipped hematocytometer and the concentration of cells per milliliter was determined. As a result, greater growth of both microalgae was obtained in the control medium and it was much higher than that of the treatments used. These results are due to the low nitrogen content of VIUSID agro and the presence of heavy metals in higher concentrations than those that can be tolerated by the microalgae studied, which limited their growth.
    Description: Published
    Description: Refereed
    Keywords: Microalgas ; Dunaliella salina ; Thalassiosira sp. ; VIUSID agro ; Guillard (f/2) ; Nitrógeno y metales pesados ; Microalgae ; Nitrogen and heavy metals
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.76-87
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  • 53
    Publication Date: 2024-02-25
    Description: Contralmirante Eduardo Carrasco Toro; primer educador naval de la República – Contralmirante Eduardo Carrasco Toro: especial reconocimiento institucional – En la Costa Verde: Estudios sobre tsunamis en aporte a la gestión de riesgo de desastres – Cartas de inundación: Herramienta eficaz ante la ocurrencia de tsunamis – Catálogo de sedimentos marinos y fluviales del Perú – El cambio climático y la producción de anchoveta en el mar peruano – Entidades geográficas: Valiosos soportes en la ayudas a la navegación – Reserva Nacional Dorsal de Nasca: Hito para la conservación de nuestro patrimonio natural. Convención de la Naciones Unidas sobre el Derecho del Mar: Régimen legal para la minería en “El Área” – Estudios entre Hook Ridge e Isla Bridgeman en el estrecho de Bransfield: Anomalías acústicas de imágenes multihaz de columna de agua – Empleo de tecnología RPA en la Antártida: En el seguimiento de los glaciares Znosko y Lange – En la Base Naval del Callao: Aporte sobre la colmatación del cauce del río Rímac – Durante el
    Description: Published
    Description: Non Refereed
    Keywords: Carrasco Toro, Eduardo ; Cartas de inundación ; Cartas de navegación ; Cartas electrónicas de navegación ; Colmatación de ríos ; Reservas naturales ; Cambios climáticos ; Tsunamis
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 87pp.
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  • 54
    facet.materialart.
    Unknown
    Publication Date: 2024-02-23
    Keywords: ddc:300
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: German
    Type: contributiontoperiodical , doc-type:contributionToPeriodical
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  • 55
    Publication Date: 2024-02-23
    Description: The establishment of the Leveraging a Climate-neutral Society–strategic Research Network (LCS–RNet) (then named the International Research Network for Low Carbon Societies) was proposed at the Group of Eight (G8) Environment Ministers’ Meeting in 2008. Its 12th annual meeting in December 2021 focused on the discussion on how to transition into a just and sustainable society and how to reduce the risks associated with the transition. This requires comprehensive studies including on the concept of transition, pathways to net-zero societies and how to realise the pathways by collaborating with various stakeholders. This Special Feature provides new insights into sustainability science by linking the scientific knowledge with practical science for the transition through the exploration of studies presented at the annual meeting. Following the opening paper, "A challenge for sustainability science: can we halt climate change?", a wide range of topics were discussed, including practices for sustainable transformation in the Erasmus University, practices in industry, energy transition and international cooperation.
    Keywords: ddc:600
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: English
    Type: article , doc-type:article
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  • 56
    Publication Date: 2024-02-23
    Keywords: ddc:600
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: German
    Type: report , doc-type:report
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  • 57
    facet.materialart.
    Unknown
    Dessau-Roßlau : Umweltbundesamt
    Publication Date: 2024-02-23
    Keywords: ddc:320
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: English
    Type: report , doc-type:report
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  • 58
    facet.materialart.
    Unknown
    Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
    In:  EPIC3Berichte zur Polar- und Meeresforschung = Reports on polar and marine research, Bremerhaven, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 782, 18 p., pp. 1-18, ISSN: 1866-3192
    Publication Date: 2024-02-23
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Berichte zur Polar- und Meeresforschung" , notRev
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  • 59
    Publication Date: 2024-02-22
    Description: SISMIKO is the operational group within the Istituto Nazionale di Geofisica e Vulcanologia responsible for deploying a temporary seismic network as a rapid response to significant seismic events [Moretti et al., 2023; https://sismiko.ingv.it/]. The purpose of the temporary seismic network is to complement the RSNi (Rete Sismica Nazionale integrata) by reducing the inter-station distances of permanent stations, where necessary. SISMIKO has a distributed structure across various INGV headquarters nationwide and in recent years has equipped itself with a consistent set of around 50 seismo-accelerometric stations and an autonomous acquisition system. This system makes the acquired data available, without restrictions, to the entire scientific community through the Italy node of the European Integrated Data Archive (EIDA [Danecek et al., 2021]) portal, ensuring a high level of data quality. To ensure a rapid response following an earthquake and rapid integration of data collected by emergency stations, a codified procedure has been established. Through this procedure, the metadata of each station is pre-configured and the data flow coming from these stations is collected within an acquisition system [D'Alema et al., 2022]. This setting allows the rapid use, if necessary, of the data obtained by SISMIKO - after a quality control - by the seismologists on duty at the INGV Operations Room [Margheriti et al., 2021]. Today, over 100 INGV personnel join SISMIKO group: technicians, technologists and researchers from each of the headquarters distributed across the national territory. A new configuration in Activity Groups allows to coordinate the distributed personnel and to cover all the aspects in the preparation of the emergency such as the technical management of the instrumentation, the field operations, to maintain contacts with the INGV Crisis Unit and the other Operational Groups and to develop automatic procedures to analyse real time seismic data (Fig 1). Besides the operational aspects, in recent years SISMIKO has promoted the recovery of continuous data recorded by temporary seismic stations installed during past seismic sequences such as in L'Aquila 2009, Po Plain 2012 and Central Italy 2016. By reconstructing the complete station's metadata, it is now possible to distribute the data to the scientific community through the EIDA portal.
    Description: Unpublished
    Description: Ferrara
    Description: OST5 Verso un nuovo Monitoraggio
    Keywords: SISMIKO ; Emergency Group ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
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  • 60
    Publication Date: 2024-02-26
    Description: INGV
    Description: Unpublished
    Description: OSA3: Climatologia e meteorologia spaziale
    Keywords: Mars calendar ; seasons ; day of year ; transient phenomena ; 05.07. Space and Planetary sciences
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: web product
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  • 61
    Publication Date: 2024-02-27
    Description: Significant progress in permafrost carbon science made over the past decades include the identification of vast permafrost carbon stocks, the development of new pan‐Arctic permafrost maps, an increase in terrestrial measurement sites for CO〈jats:sub〉2〈/jats:sub〉 and methane fluxes, and important factors affecting carbon cycling, including vegetation changes, periods of soil freezing and thawing, wildfire, and other disturbance events. Process‐based modeling studies now include key elements of permafrost carbon cycling and advances in statistical modeling and inverse modeling enhance understanding of permafrost region C budgets. By combining existing data syntheses and model outputs, the permafrost region is likely a wetland methane source and small terrestrial ecosystem CO〈jats:sub〉2〈/jats:sub〉 sink with lower net CO〈jats:sub〉2〈/jats:sub〉 uptake toward higher latitudes, excluding wildfire emissions. For 2002–2014, the strongest CO〈jats:sub〉2〈/jats:sub〉 sink was located in western Canada (median: −52 g C m〈jats:sup〉−2〈/jats:sup〉 y〈jats:sup〉−1〈/jats:sup〉) and smallest sinks in Alaska, Canadian tundra, and Siberian tundra (medians: −5 to −9 g C m〈jats:sup〉−2〈/jats:sup〉 y〈jats:sup〉−1〈/jats:sup〉). Eurasian regions had the largest median wetland methane fluxes (16–18 g CH〈jats:sub〉4〈/jats:sub〉 m〈jats:sup〉−2〈/jats:sup〉 y〈jats:sup〉−1〈/jats:sup〉). Quantifying the regional scale carbon balance remains challenging because of high spatial and temporal variability and relatively low density of observations. More accurate permafrost region carbon fluxes require: (a) the development of better maps characterizing wetlands and dynamics of vegetation and disturbances, including abrupt permafrost thaw; (b) the establishment of new year‐round CO〈jats:sub〉2〈/jats:sub〉 and methane flux sites in underrepresented areas; and (c) improved models that better represent important permafrost carbon cycle dynamics, including non‐growing season emissions and disturbance effects.〈/jats:p〉
    Repository Name: EPIC Alfred Wegener Institut
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  • 62
    Publication Date: 2024-02-27
    Description: This study investigates the dynamics of magmatic intrusions based on the joint analysis of analog and numerical models.By injecting different fluids from the bottom of a solidified gelatin block, we simulate the propagation of magmatic intrusions through the crust and record their shapes, trajectories, and velocity as they rise towards the surface. Additionally, we make use of a 2D fluid-filled crack propagation model constrained by our experimental observations. The numerical simulations demonstrate that our viscous fluid-filled crack experiments, conducted with silicon-oil injections, propagate in the same regime as typical basaltic intrusions. The comparison between analog and numerical results allow us to define the domain of validity of the numerical model and its limit of applicability. This study provides new insights into the processes that control the propagation of magmatic intrusions and our ability to reproduce them using analog and numerical models.
    Description: Published
    Description: 67-87
    Description: OSV1: Verso la previsione dei fenomeni vulcanici pericolosi
    Description: N/A or not JCR
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 63
    Publication Date: 2024-02-27
    Description: Volcanism in continental rifts is generally observed to shift over time from the inside of the basin to its flanks and vice versa, but the controls on these switches are still unclear. Here we use numerical simulations of dike propagation to test the hypothesis that the spatio-temporal evolution of rift volcanism is controlled by the crustal stresses produced during the development of the rift basin. We find that the progressive deepening of a rift rotates the direction of the principal stresses under the basin, deflecting ascending dikes. This causes an early shift of volcanism from the inside of the graben to its flanks. The intensification of this stress pattern, due to further deepening of the basin, promotes the formation of lower crustal sill-like intrusions that can stack under the rift, shallowing the depth at which dikes nucleate, eventually causing a late stage of in-rift axial volcanism. Given the agreement between our model results and observations, we conclude that the temporal shifts in the location of rift volcanism are controlled to first order by the elastic stresses developing in the crust as the rift matures. We thereby suggest that geodynamic models should account for elasticity and the redistribution of surface loads in order to effectively reproduce rift-related magmatism.
    Description: Published
    Description: 118593
    Description: OSV1: Verso la previsione dei fenomeni vulcanici pericolosi
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 64
    Publication Date: 2024-02-28
    Description: The stomach content of 60 krill specimens from the Southern Ocean were analyzed for the presence of micro-plastic (MP), by testing different sample volumes, extraction approaches, and applying hyperspectral imaging Fourier-transform infrared spectroscopy (μFTIR). Strict quality control was applied on the generated results. A high load of residual materials in pooled samples hampered the analysis and avoided a reliable determination of putative MP particles. Individual krill stomachs displayed reliable results, however, only after re-treating the samples with hydrogen peroxide. Before this treatment, lipid rich residues of krill resulted in false assignments of polymer categories and hence, false high MP particle numbers. Finally, MP was identified in 4 stomachs out of 60, with only one MP particle per stomach. Our study highlights the importance of strict quality control to verify results before coming to a final decision on MP contamination in the environment to aid the establishment of suitable internationally standardized protocols for sampling and analysis of MP in organisms including their habitats in Southern Ocean and worldwide.
    Repository Name: EPIC Alfred Wegener Institut
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  • 65
    Publication Date: 2024-02-28
    Description: Sediment reworking by benthic infauna, namely bioturbation, is of pivotal importance in expansive soft-sediment environments such as the Wadden Sea. Bioturbating fauna facilitate ecosystem functions such as bentho-pelagic coupling and sediment nutrient remineralization capacities. Yet, these benthic fauna are expected to be profoundly affected by current observed rising sea temperatures. In order to predict future changes in ecosystem functioning in soft-sediment environments like the Wadden Sea, knowledge on the underlying processes such as sediment reworking, is crucial. Here, we tested how temperature affects bioturbation and its associated ecosystem processes, such as benthic nutrient fluxes and sediment oxygen consumption, using luminophore tracers and sediment incubation cores. We used a controlled mesocosm experiment set-up with key Wadden Sea benthos species: the burrowing polychaetes Arenicola marina and Hediste diversicolor, the bivalve Cerastoderma edule, and the tube-building polychaete Lanice conchilega. The highest bioturbation rates were observed from A. marina, reaching up to 375 cm2yr−1; followed by H. diversicolor, with 124 cm2yr−1 being the peak bioturbation rate for the ragworm. Additionally, the sediment reworking activity of A. marina facilitated nearly double the amount of silicate efflux compared to any other species. Arenicola marina and H. diversicolor accordingly facilitated stronger nutrient effluxes under a warmer temperature than L. conchilega and C. edule. The oxygen uptake of A. marina and H. diversicolor within the sediment incubation cores was correspondingly enhanced with a higher temperature. Thus, increases in sea temperatures may initially be beneficial to ecosystem functioning in the Wadden Sea as faunal bioturbation is definitely expedited, leading to a tighter coupling between the sediment and overlying water column. The enhanced bioturbation activity, oxygen consumption, and facilitated nutrient effluxes from these invertebrates themselves, will aid in the ongoing high levels of primary productivity and organic matter production.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 66
    Publication Date: 2024-02-28
    Description: 〈jats:p〉Abstract. Understanding the future evolution of permafrost requires a better understanding of its climatological past. This requires permafrost models to efficiently simulate the thermal dynamics of permafrost over the past centuries to millennia, taking into account highly uncertain soil and snow properties. In this study, we present a computationally efficient numerical permafrost model which satisfactorily reproduces the current ground temperatures and active layer thicknesses of permafrost in the Arctic and their trends over recent centuries. The performed simulations provide insights into the evolution of permafrost since the 18th century and show that permafrost on the North American continent is subject to early degradation, while permafrost on the Eurasian continent is relatively stable over the investigated 300-year period. Permafrost warming since industrialization has occurred primarily in three “hotspot” regions in northeastern Canada, northern Alaska, and, to a lesser extent, western Siberia. We find that the extent of areas with a high probability (p3 m>0.9) of near-surface permafrost (i.e., 3 m of permafrost within the upper 10 m of the subsurface) has declined substantially since the early 19th century, with loss accelerating during the last 50 years. Our simulations further indicate that short-term climate cooling due to large volcanic eruptions in the Northern Hemisphere in some cases favors permafrost aggradation within the uppermost 10 m of the ground, but the effect only lasts for a relatively short period of a few decades. Despite some limitations, e.g., with respect to the representation of vegetation, the presented model shows great potential for further investigation of the climatological past of permafrost, especially in conjunction with paleoclimate modeling. 〈/jats:p〉
    Repository Name: EPIC Alfred Wegener Institut
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  • 67
    facet.materialart.
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    American Geophysical Union (AGU)
    In:  EPIC3Journal of Geophysical Research: Solid Earth, American Geophysical Union (AGU), 129(3), ISSN: 2169-9313
    Publication Date: 2024-03-04
    Description: 〈jats:title〉Abstract〈/jats:title〉〈jats:p〉Extensive investigation of continental rift systems has been fundamental for advancing the understanding of extensional tectonics and modes of formation of new ocean basins. However, current rift classification schemes do not account for conjugate end members formed by Large Igneous Province crust, referring to thick mafic crust, sometimes including continental fragments. Here, we investigate the rifting of William's Ridge (Kerguelen Plateau) and Broken Ridge, components of the Kerguelen Large Igneous Province now situated in the Southeast Indian Ocean, and incorporate these end members into the deformation migration concept for rifted margins. We use multichannel seismic reflection profiles and data from scientific drill cores acquired on both conjugate margins to propose, for the first time, a combined tectono‐stratigraphic framework. We interpret seismic patterns, tectonic features, and magnetic anomaly picks to determine an across‐strike structural domain classification. This interpretation considers the rift system overall to be “magma‐poor” despite being located proximal to the Kerguelen plume but suggests that syn‐rift interaction between the Kerguelen mantle plume and the lithospheric structure of William's Ridge and Broken Ridge has controlled the along‐strike segmentation of both conjugates. We integrate seismic reflection and bathymetric data to test the hypothesis of predominantly transform motion, between the Australian and Antarctic plates, in Late Cretaceous and Paleogene time.〈/jats:p〉
    Repository Name: EPIC Alfred Wegener Institut
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  • 68
    facet.materialart.
    Unknown
    American Geophysical Union (AGU)
    In:  EPIC3Journal of Geophysical Research: Solid Earth, American Geophysical Union (AGU), 129(3), ISSN: 2169-9313
    Publication Date: 2024-03-04
    Description: 〈jats:title〉Abstract〈/jats:title〉〈jats:p〉Extensive investigation of continental rift systems has been fundamental for advancing the understanding of extensional tectonics and modes of formation of new ocean basins. However, current rift classification schemes do not account for conjugate end members formed by Large Igneous Province crust, referring to thick mafic crust, sometimes including continental fragments. Here, we investigate the rifting of William's Ridge (Kerguelen Plateau) and Broken Ridge, components of the Kerguelen Large Igneous Province now situated in the Southeast Indian Ocean, and incorporate these end members into the deformation migration concept for rifted margins. We use multichannel seismic reflection profiles and data from scientific drill cores acquired on both conjugate margins to propose, for the first time, a combined tectono‐stratigraphic framework. We interpret seismic patterns, tectonic features, and magnetic anomaly picks to determine an across‐strike structural domain classification. This interpretation considers the rift system overall to be “magma‐poor” despite being located proximal to the Kerguelen plume but suggests that syn‐rift interaction between the Kerguelen mantle plume and the lithospheric structure of William's Ridge and Broken Ridge has controlled the along‐strike segmentation of both conjugates. We integrate seismic reflection and bathymetric data to test the hypothesis of predominantly transform motion, between the Australian and Antarctic plates, in Late Cretaceous and Paleogene time.〈/jats:p〉
    Repository Name: EPIC Alfred Wegener Institut
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  • 69
    facet.materialart.
    Unknown
    American Geophysical Union (AGU)
    In:  EPIC3Journal of Geophysical Research: Solid Earth, American Geophysical Union (AGU), 129(3), ISSN: 2169-9313
    Publication Date: 2024-03-04
    Description: 〈jats:title〉Abstract〈/jats:title〉〈jats:p〉Extensive investigation of continental rift systems has been fundamental for advancing the understanding of extensional tectonics and modes of formation of new ocean basins. However, current rift classification schemes do not account for conjugate end members formed by Large Igneous Province crust, referring to thick mafic crust, sometimes including continental fragments. Here, we investigate the rifting of William's Ridge (Kerguelen Plateau) and Broken Ridge, components of the Kerguelen Large Igneous Province now situated in the Southeast Indian Ocean, and incorporate these end members into the deformation migration concept for rifted margins. We use multichannel seismic reflection profiles and data from scientific drill cores acquired on both conjugate margins to propose, for the first time, a combined tectono‐stratigraphic framework. We interpret seismic patterns, tectonic features, and magnetic anomaly picks to determine an across‐strike structural domain classification. This interpretation considers the rift system overall to be “magma‐poor” despite being located proximal to the Kerguelen plume but suggests that syn‐rift interaction between the Kerguelen mantle plume and the lithospheric structure of William's Ridge and Broken Ridge has controlled the along‐strike segmentation of both conjugates. We integrate seismic reflection and bathymetric data to test the hypothesis of predominantly transform motion, between the Australian and Antarctic plates, in Late Cretaceous and Paleogene time.〈/jats:p〉
    Repository Name: EPIC Alfred Wegener Institut
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  • 70
    facet.materialart.
    Unknown
    American Geophysical Union (AGU)
    In:  EPIC3Geochemistry Geophysics Geosystems, American Geophysical Union (AGU), 25(1), ISSN: 1525-2027
    Publication Date: 2024-03-04
    Description: Mineral dust accumulated on the ocean floor is an important archive for reconstructing past atmospheric circulation changes and climatological conditions in the source areas. Dust emitted from Southern Hemisphere dust sources is widely deposited over the oceans. However, there are few records of dust deposition over the open ocean, and a large need for extended geographical coverage exists. We present a large data set (134 surface sediment samples) of Late Holocene dust deposition from seafloor surface sediments covering the entire South Atlantic Ocean. Polymodal grain-size distributions of the lithogenic fraction indicate that the sediments are composed of multiple sediment components. By using end-member modeling, we attempt to disentangle the dust signal from non-aeolian sediments. Combined with 230Th-normalized lithogenic fluxes, we quantified the specific deposition fluxes for mineral dust, crrent-sorted sediments and ice-rafted debris (IRD). Although the method could not completely separate the different components in every region, it shows that dust deposition off the most prominent dust source for the South Atlantic Ocean—southern South America—amounts up to approximately 0.7 g cm−2 Kyr−1 and decreases downwind. Bottom-current-sorted sediments and IRD are mostly concentrated around the continental margins. The ratio of the coarse to fine dust end members reveals input from north African dust sources to the South Atlantic. The majority of the observations are in good agreement with new model simulations. This extensive and relevant data set of dust grain size and deposition fluxes to the South Atlantic could be used to calibrate and validate further model simulations.
    Repository Name: EPIC Alfred Wegener Institut
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  • 71
    facet.materialart.
    Unknown
    American Geophysical Union (AGU)
    In:  EPIC3Journal of Geophysical Research: Solid Earth, American Geophysical Union (AGU), 129(3), ISSN: 2169-9313
    Publication Date: 2024-03-04
    Description: 〈jats:title〉Abstract〈/jats:title〉〈jats:p〉Extensive investigation of continental rift systems has been fundamental for advancing the understanding of extensional tectonics and modes of formation of new ocean basins. However, current rift classification schemes do not account for conjugate end members formed by Large Igneous Province crust, referring to thick mafic crust, sometimes including continental fragments. Here, we investigate the rifting of William's Ridge (Kerguelen Plateau) and Broken Ridge, components of the Kerguelen Large Igneous Province now situated in the Southeast Indian Ocean, and incorporate these end members into the deformation migration concept for rifted margins. We use multichannel seismic reflection profiles and data from scientific drill cores acquired on both conjugate margins to propose, for the first time, a combined tectono‐stratigraphic framework. We interpret seismic patterns, tectonic features, and magnetic anomaly picks to determine an across‐strike structural domain classification. This interpretation considers the rift system overall to be “magma‐poor” despite being located proximal to the Kerguelen plume but suggests that syn‐rift interaction between the Kerguelen mantle plume and the lithospheric structure of William's Ridge and Broken Ridge has controlled the along‐strike segmentation of both conjugates. We integrate seismic reflection and bathymetric data to test the hypothesis of predominantly transform motion, between the Australian and Antarctic plates, in Late Cretaceous and Paleogene time.〈/jats:p〉
    Repository Name: EPIC Alfred Wegener Institut
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  • 72
    facet.materialart.
    Unknown
    Springer Nature
    In:  EPIC3Analytical and Bioanalytical Chemistry, Springer Nature, 416(6), pp. 1311-1320, ISSN: 1618-2642
    Publication Date: 2024-03-04
    Description: FTIR spectral identification is today’s gold standard analytical procedure for plastic pollution material characterization. High-throughput FTIR techniques have been advanced for small microplastics (10–500 µm) but less so for large microplastics (500–5 mm) and macroplastics (〉 5 mm). These larger plastics are typically analyzed using ATR, which is highly manual and can sometimes destroy particles of interest. Furthermore, spectral libraries are often inadequate due to the limited variety of reference materials and spectral collection modes, resulting from expensive spectral data collection. We advance a new high-throughput technique to remedy these problems using FTIR microplate readers for measuring large particles (〉 500 µm). We created a new reference database of over 6000 spectra for transmission, ATR, and reflection spectral collection modes with over 600 plastic, organic, and mineral reference materials relevant to plastic pollution research. We also streamline future analysis in microplate readers by creating a new particle holder for transmission measurements using off-the-shelf parts and fabricating a nonplastic 96-well microplate for storing particles. We determined that particles should be presented to microplate readers as thin as possible due to thick particles causing poor-quality spectra and identifications. We validated the new database using Open Specy and demonstrated that additional transmission and reflection spectra reference data were needed in spectral libraries.
    Repository Name: EPIC Alfred Wegener Institut
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  • 73
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    Annual Reviews
    In:  EPIC3Annual Review of Marine Science, Annual Reviews, 16(1), pp. 417-441, ISSN: 1941-1405
    Publication Date: 2024-03-01
    Description: The genus Phaeocystis is globally distributed, with blooms commonly occurring on continental shelves. This unusual phytoplankter has two major morphologies: solitary cells and cells embedded in a gelatinous matrix. Only colonies form blooms. Their large size (commonly 2 mm but up to 3 cm) and mucilaginous envelope allow the colonies to escape predation, but data are inconsistent as to whether colonies are grazed. Cultured Phaeocystis can also inhibit the growth of co-occurring phytoplankton or the feeding of potential grazers. Colonies and solitary cells use nitrate as a nitrogen source, although solitary cells can also grow on ammonium. Phaeocystis colonies might be a major contributor to carbon flux to depth, but in most cases, colonies are rapidly remineralized in the upper 300 m. The occurrence of large Phaeocystis blooms is often associated with environments with low and highly variable light and high nitrate levels, with Phaeocystis antarctica blooms being linked additionally to high iron availability. Emerging results indicate that different clones of Phaeocystis have substantial genetic plasticity, which may explain its appearance in a variety of environments. Given the evidence of Phaeocystis appearing in new systems, this trend will likely continue in the near future.
    Repository Name: EPIC Alfred Wegener Institut
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  • 74
    Publication Date: 2024-03-01
    Description: All Rights Reserved
    Description: Predicting coastal change depends upon our knowledge of postglacial relative sea-level variability, partly controlled by glacio-isostatic responses to ice-sheet melting. Here, we reconstruct the postglacial relative sea-level changes along the Caribbean and Pacific coasts of northwestern South America by numerically solving the sea-level equation with two scenarios of mantle viscosity: global standard average and high viscosity. Our results with the standard model (applicable to the Pacific coast) agree with earlier studies by indicating a mid-Northgrippian high stand of ~2 m. The high-viscosity simulation (relevant to the Caribbean coast) shows that the transition from far- to intermediate-field influence of the Laurentide Ice Sheet occurs between Manzanillo del Mar and the Gulf of Morrosquillo. South of this location, the Colombian Caribbean coast has exhibited a still stand with a nearly constant Holocene relative sea level. By analyzing our simulations considering sea-level indicators, we argue that tectonics is more prominent than previously assumed, especially along the Caribbean coast. This influence prevents a simplified view of regional relative sea-level changes on the northwestern South American coast.
    Description: In press
    Description: OSA4: Ambiente marino, fascia costiera ed Oceanografia operativa
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 75
    Publication Date: 2024-03-04
    Description: The Central Italy seismic sequence began on August 24th, 2016, and was marked by three mainshocks in two months culminated with the Mw 6.5, October 30th, 2016, event. Location, depth and prevalent normal faulting mechanisms indicate that the sequence originated in the shallow crust of the Apennine chain where the current extensional regime overprints contractional structures. Structural complexity plays a major role in fault segmentation and interaction in this region, with important consequences on seismic behavior and mechanics of earthquake faulting. This complexity is evidenced by the co-existence of fault planes with different focal mechanisms in the same area. Here we analyze the robustness of moment tensor solutions for the three mainshocks of the 2016-2017 Central Italy sequence. In particular, we study the effect of number and distribution of the inverted stations and employed wave speed model (1D and 3D) with the goal of providing more reliable estimates of the source parameters (strike, dip, rake and Mw) and corresponding uncertainties. The latter are estimated by performing a bootstrap analysis on hundreds of solutions computed by varying the distribution of stations for 1D and 3D velocity models. Moreover, we report on reviewed source geometries of the Central Italy sequence as retrieved by moment tensor analysis by integrating the actual TDMT revised catalogue (http://terremoti.ingv.it/tdmt) for M4+, with new updated solutions based on a new Italian 3D wave speed model. The realization of a complete moment tensor catalogue, in addition to the estimate of uncertainties associated to the computed focal planes and Mw for the three mainshocks, can contribute to explain the complexity of the seismogenic processes active in the Central Apennines and help in understanding the main features of this seismic sequence.
    Description: Published
    Description: San Francisco
    Description: OST4 Descrizione in tempo reale del terremoto, del maremoto, loro predicibilità e impatto
    Keywords: 2016-2017 Central Italy Seismic Sequence ; Uncertainty ; Moment Tensor Catalog
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 76
    Publication Date: 2024-03-04
    Description: Kinematic finite fault inversion procedures of strong motion data are usually managed by calculating Green's functions for 1D layered seismic velocity models with flat surface topography. However, many regions in the world are characterized by significant topography and complex geological models. In these cases, the lack of adoption of more complex seismic wave propagation models and surface topography during finite fault kinematic inversions can significantly impact on the retrieved source parameters. We have modified the non-negative least-square inversion method of Dreger et al. [2005] for taking into account Green's functions generated by SPECFEM3D for a 3D velocity model including topography. The computation of Green's functions for such model is very expensive, for this reason we have decided to assume a fixed fault geometry, allowing only for rake variation and inverting for rupture velocity, rise time and slip distribution. We have applied the new procedure for the finite fault inversion of the 2016 Mw 6.5 Norcia earthquake, for which none of the several studies in literature have adopted 3D layered seismic velocity models or have taken into account the significant topography of this area. We have finally compared the slip model retrieved with this procedure to the model from Scognamiglio et al. (2018) obtained with same data and fault geometry but 1D velocity model and no topography.
    Description: Published
    Description: San Francisco
    Description: OST3 Vicino alla faglia
    Keywords: Kinematic source inversion ; Norcia ; Topography ; 3D velocity model
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 77
    Publication Date: 2024-03-04
    Description: A challenge in earthquake seismology is the provision of realistic and accurate ground-shaking scenarios for seismic hazard and risk assessment. Owing to the exponential growth of HPC resources, the application of physics-based methods to ground motion characterization has become increasingly popular. However, physics-based techniques could break down in the simulation of high-frequency ground motion, particularly at frequencies higher than 1 Hz, which are the most relevant for earthquake engineers. A main issue is represented by the limited resolution of seismic wave speed models. Currently, one of the best approaches to retrieve high-resolution wave speed models relies on the combination of the Spectral Element Method (SEM) with adjoint-state methods within the framework of (3D) Full Waveform Inversion (FWI). Here we use the Salvus software to resolve the velocity structure of central Italy, which is exposed to high seismic hazard. We invert a dataset including 248 events (occurred between 2005 and 2019, with a magnitude ranging between 2.8 and 5.5) recorded by the Italian seismic network and provided by INGV. We implement a multi-scale approach to 3D-FWI by progressively incorporating the high-frequency content of waveform recording. In the first cycle of iterations, we retrieve the long-wavelength structure of the model. At this stage, we also perform several tests, e.g. different source/receiver cutouts, to properly tune the FWI configuration parameters to our problem. Then we use the best fitting model as the initial model of a second cycle of iterations, combining it with Vs30 and topographic data. By accounting for site effects, we maximize the level of detail in the starting model, thus preventing the FWI algorithm from being trapped in local minima. The retrieved high-resolution wave speed model will shed light on the velocity structure of central Italy, thus improving the seismic hazard assessment of this region.
    Description: Published
    Description: Toronto
    Description: OST1 Alla ricerca dei Motori Geodinamici
    Keywords: Adjoint method ; 3D velocity model
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 78
    Publication Date: 2024-03-04
    Description: The Adria plate plays a peculiar role in the geodynamics of the Central Mediterranean. It is the foreland of non-coeval mountain ranges and its margins are consumed in the process by subduction systems under the Alps to the north, the Apennines to the west and the Dinarides to the east. The complex behavior of this system and the large heterogeneity in data availability lead to a fragmented understanding of the Adria plate. In particular, its lithospheric structure, in terms of Vp and Vs profiles, is poorly known due to a lack of seismic stations, poor earthquake location quality (large observational gaps) and the consequent lack of coverage by classical seismic tomography methods. The uncertainties increase the difficulty of correctly assessing the seismic hazard along the Adriatic coasts (including tsunami hazard). Recently, we have proposed IMAGINE_IT, a reference 3D high-reso- lution seismic tomography of the Italian lithosphere. Enhanced accuracy is enabled by three-dimensional wavefield simulations based on SPECFEM3D in combination with an adjoint-state method. The Adria plate is located at the eastern border of the volume considered in the simulations, nevertheless, our tomography is able to image this plate with an unprecedented resolution and supports the idea that it is made of two distinct microplates having dif- ferent fabric and behavior and separated by the Gargano deformation zone. We have highlighted a northern portion with more complex wavespeed anomalies and a thinner crust, and a southern part with a more regularly layered wavespeed structure and a thicker crust. Here, we focus on additional details of those images, such as the mid-Adriatic ridge and a new set of iterations that exploit 7 years of additional data (IMAGINE_IT was limited to data until 2015) and the 2016-2019 AlpArray very dense regional arrays of broadband seismic stations which provide a new opportunity to improve our comprehension of the area.
    Description: Published
    Description: Toronto
    Description: OST1 Alla ricerca dei Motori Geodinamici
    Keywords: Adria ; adjoint tomography
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 79
    Publication Date: 2024-02-29
    Description: Salps have attracted attention as zooplankton organisms that may be able to expand their habitat range and increase their ecological importance in the face of ongoing global warming. Due to their gelatinous nature, unique feeding strategy, and reproductive ecology such changes could have profound impacts on regional marine ecosystems. While their role in the regional carbon cycle is receiving attention, our knowledge of their physiology and life cycle is still limited. This knowledge gap is mainly due to their fragile gelatinous nature, which makes it difficult to capture and maintain intact specimen in the laboratory. We present here a modified kreisel tank system that has been tested onboard a research vessel with the Southern Ocean salp Salpa thompsoni and at a research station with Salpa fusiformis and Thalia democratica from the Mediterranean Sea. Successful maintenance over days to weeks allowed us to obtain relative growth and developmental rates comparable to in situ field samples of S. thompsoni and S. fusiformis, and provided insights into previously unknown features of their life cycle (e.g., testes development). Our results show that traditional methods of estimating growth, such as cohort analysis, may lead to a general overestimation of growth rates and neglect individual strategies (e.g., shrinkage), which can affect the results and conclusions drawn from population dynamic models. By providing a starting point for the successful maintenance of different species, comparable experiments on the physiology of salps is made possible. This will contribute to refining model parameters and improving the reliability of the predictions.
    Repository Name: EPIC Alfred Wegener Institut
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  • 80
    Publication Date: 2024-02-29
    Description: With Arctic ground as a huge and temperature-sensitive carbon reservoir, maintaining low ground temperatures and frozen conditions to prevent further carbon emissions that contrib-ute to global climate warming is a key element in humankind’s fight to maintain habitable con-ditions on earth. Former studies showed that during the late Pleistocene, Arctic ground condi-tions were generally colder and more stable as the result of an ecosystem dominated by large herbivorous mammals and vast extents of graminoid vegetation – the mammoth steppe. Characterised by high plant productivity (grassland) and low ground insulation due to animal-caused compression and removal of snow, this ecosystem enabled deep permafrost aggrad-ation. Now, with tundra and shrub vegetation common in the terrestrial Arctic, these effects are not in place anymore. However, it appears to be possible to recreate this ecosystem local-ly by artificially increasing animal numbers, and hence keep Arctic ground cold to reduce or-ganic matter decomposition and carbon release into the atmosphere. By measuring thaw depth, total organic carbon and total nitrogen content, stable carbon iso-tope ratio, radiocarbon age, n-alkane and alcohol characteristics and assessing dominant vegetation types along grazing intensity transects in two contrasting Arctic areas, it was found that recreating conditions locally, similar to the mammoth steppe, seems to be possible. For permafrost-affected soil, it was shown that intensive grazing in direct comparison to non-grazed areas reduces active layer depth and leads to higher TOC contents in the active layer soil. For soil only frozen on top in winter, an increase of TOC with grazing intensity could not be found, most likely because of confounding factors such as vertical water and carbon movement, which is not possible with an impermeable layer in permafrost. In both areas, high animal activity led to a vegetation transformation towards species-poor graminoid-dominated landscapes with less shrubs. Lipid biomarker analysis revealed that, even though the available organic material is different between the study areas, in both permafrost-affected and sea-sonally frozen soils the organic material in sites affected by high animal activity was less de-composed than under less intensive grazing pressure. In conclusion, high animal activity af-fects decomposition processes in Arctic soils and the ground thermal regime, visible from reduced active layer depth in permafrost areas. Therefore, grazing management might be utilised to locally stabilise permafrost and reduce Arctic carbon emissions in the future, but is likely not scalable to the entire permafrost region.
    Repository Name: EPIC Alfred Wegener Institut
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  • 81
    Publication Date: 2024-02-29
    Description: Potential CO2 leakage from deep geologic reservoirs requires evaluation on a site-specific basis to assess risk and arrange mitigation strategies. In this study, a heterogeneous and realistic numerical model was developed to investigate CO2 migration pathways and uprising time in a shaly overburden, located in the Malaysian off-shore. Fluid flow and reactive transport simulations were performed by TOUGHREACT to evaluate the: (1) seepage through the caprock; (2) CO2-rich brine leakage through a fault connecting the reservoir with seabed. The effect of several factors, which may contribute to CO2 migration, including different rock types and permeability, Fickian and Knudsen diffusion and CO2 adsorption in the shales were investigated. Obtained results show that permeability mainly ruled CO2 uprising velocity and pathways. CO2 migrates upward by buoyancy without any important lateral leakages due to poor-connection of permeable layers and comparable values of vertical and horizontal permeability. Diffusive flux and the Knudsen flow are negligible with respect to the Darcy regime, despite the presence of shales. Main geochemical reactions deal with carbonate and pyrite weathering which easily reach saturation due to low permeability and allowing for re-precipitation as secondary phases. CO2 adsorption on shales together with dissolved CO2 constituted the main trapping mechanisms, although the former represents likely an overestimation due to estimated thermodynamic parameters. Developed models for both scenarios are validated by the good agreement with the pressure profiles recorded in the exploration wells and the seismic data along a fault (the F05 fault), suggesting that they can accurately reproduce the main processes occurring in the system.
    Description: Published
    Description: 1016
    Description: OSA5: Energia e georisorse
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 82
    Publication Date: 2024-02-29
    Description: In dieser Abschrift der Bergordnung wurden zur besseren Übersicht noch einmal die 23 Paragrafen der Kremnitzer Bergordnung von 1492 aufgeführt. Im Jahr 1504 wurden drei Paragrafen hinzugefügt. Im Jahr 1537 erließ Oberkammergrafen Bernhard Behem weitere 21 Paragrafen. Der Bergmeister wurde hier zur obersten Amtsperson im Revier erklärt und entsprechend vereidigt. Beschrieben wurden ausführlich seine Rechte und Pflichten.
    Description: source
    Keywords: Slowakei ; Ungarn ; Kremnitz/Kremnica ; Silberbergbau ; Bergordnung
    Language: German
    Type: doc-type:book , updatedVersion
    Format: 20
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  • 83
    Publication Date: 2024-03-01
    Description: Masters
    Keywords: couvert végétal ; écologie ; système lagunaire
    Repository Name: AquaDocs
    Type: Thesis/Dissertation
    Format: 121 pp.
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  • 84
    facet.materialart.
    Unknown
    Université de Carthage. Institut National Agronomique de Tunisie. Département : Génie Halieutique et Environnement
    Publication Date: 2024-03-01
    Description: Cette étude consiste en une caractérisation sédimentologique et diachronique du système lagunaire côtier afin d’évaluer l’impact naturel et anthropique sur l’activité de pêche lagunaire. La méthodologie s’appuie sur une approche multicritère soit une analyse sédimentologique de la lagune de Ghar El Melah, complétée par une analyse morphoscopique et une étude diachronique temporelle à long et moyen terme (1881-2021) de la ligne de rivage de la lagune, et ce par l’outil statistique DSAS (Digital Shoreline Analysis System). Selon les résultats obtenus, L’étude sédimentologique du rivage de la lagune de Ghar El Melah révèle un faciès sédimentaire homogène avec des sables moyens à fins, bien classés et unimodaux. Cette étude sédimentologique confirme la dualité d’origine et du transport des apports sédimentaires. L’étude diachronique effectuée (1881-2021) révèle que le taux d'érosion maximum dans la zone d'étude est de -14,88 ±0,20 m/an au niveau de l’ancien delta de la Medjerda, le taux d'accrétion est de +7,35 ±0,20 m/an au niveau de la nouvelle embouchure de Boughaz et que la surface de la lagune a augmenté de 400,9 ha. Ce qui a impacté négativement, en synergie avec l’ensablement et l’élargissement de la passe de Boughaz, l’activité de pêche dans la lagune de Ghar El Melah. L’enquête socioéconomique a permis de mettre en exergue la situation actuelle de la pêche lagunaire et les problèmes éventuellement rencontrés. 88% des enquêtés ont décelé des changements morpho dynamiques au niveau de cette lagune, ce qui a impacté la biodiversité ichtyque et d’où l’exercice de la pêche lagunaire
    Description: This study consists of a sedimentological and diachronic characterization of the coastal lagoon system in order to assess the natural and anthropogenic impact on the lagoon fishing activity. The methodology is based on a multi-criteria approach: a sedimentological analysis of the lagoon sediments, supplemented by a morphoscopic analysis and a long and medium-term diachronic temporal study (1881-2021) of the shoreline of the lagoon of Ghar El Melah using the statistical tool DSAS (Digital Shoreline Analysis System). According to the results obtained, the sedimentological study of the shore of the lagoon of Ghar El Melah reveals homogeneous sedimentary facies with medium to fine sands, well sorted and unimodal. This sedimentological study confirms the duality of origin and transport of sedimentary inputs The diachronic study carried out reveals that the maximum erosion rate in the study area is -14.88 ± 0.20 m/year at the level of the old Medjerda delta, the accretion rate is +7.35 ± 0.20 m/year at the new mouth of Boughaz and the surface of this lagoon reveals an increase between 1881-2021 of 400.9 ha. Which negatively impacted, in synergy with the silting up and the widening of the Boughaz pass, the lagoon fishing activity. The socioeconomic survey highlights the current situation of lagoon fishing and the problems encountered. 88% of fishermen detected morphodynamic changes in this lagoon, which impacted halieutic biodiversity and hence the lagoon fishing activities
    Description: Masters
    Keywords: étude socioéconomique ; pêche lagunaire ; dynamique sédimentaire ; sedimentary dynamics ; socioeconomic
    Repository Name: AquaDocs
    Type: Thesis/Dissertation
    Format: 101 pp
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  • 85
    Publication Date: 2024-03-01
    Description: Ces dernières années, la contamination par les microplastiques (MP) est devenue une préoccupation mondiale. Les particules (〈 5 mm) représentent de plus en plus une menace globale et persistante pour l'ensemble des écosystèmes. Dans cette étude, l'abondance et les propriétés (taille, forme et type de polymère) des MPs dans les échantillons d'eau de surface de la mer et les sédiments du sable ont été étudiés dans quatre zones côtières de la mer Méditerranée (Golfe de Tunis, îles Pilau et Plane, plage de Ghar El Melh et Chatt Mami). Les îles ont montré l'abondance moyenne des MPs la plus élevée (0,007 à 1,967 éléments/m³), suivi de la plage de Ghar El Melh (0,019 à 0,068 éléments/g), du Chatt Mami (0,012 à 0,057 éléments/g) et du golfe de Tunis (0,009 à 0,053 éléments/m³). Les résultats ont montré que les MPs détectés dans tous les échantillons, indiquant une vaste répartition toute au long de la côte tunisienne. Les MPs représentatifs des quatre sites ont été préparés pour l'identification des polymères par Spectroscopie Infrarouge à Transformée de Fourier (FTIR ATR). Au total, neuf types de polymères ont été détectés (PVC, PET, PP, PE, PS, PA, PVDF et PEHD). Les formes identifiées dans cette étude sont (Fragments, Films, Filaments et Granulés) avec une prédominance des fragments détectés sur la surface de l'eau et les filaments détectés dans les sédiments ainsi qu’une contribution assez faible des granulés. Cette étude a permis donc de générer des données originales sur la présence de MPs dans les sédiments et les surfaces de l'eau côtiers de la côte nord tunisienne.
    Description: These last years, Microplastic contamination (MP) has become a global concern. Particles (〈 5 mm) increasingly represent a global and persistent threat to all ecosystems. In this study, the abundance and properties (size, shape and polymer type) of MPs in sea surface water samples and sand sediments were studied in four coastal areas of the Mediterranean Sea (Gulf from Tunis, Pilau and Plane islands, Ghar El Melh and Chatt Mami beach). The islands showed the highest average abundance of MPs (0.007 to 1.967 elements/m³), followed by Ghar El Melh beach (0.019 to 0.068 elements/g), Chatt Mami (0.012 to 0.057 elements/g) and the Gulf of Tunis (0.009 to 0.053 elements/m³). The results showed that MPs detected in all samples, indicating a wide distribution along the Tunisian coast. Representative MPs from the four sites were prepared for polymer identification by Fourier Transform Infrared Spectroscopy (FTIR-ATR). In total, nine types of polymers were detected (PVC, PET, PP, PE, PS, PA, PVDF and HDPE). The forms identified in this study are (Fragments, Films, Filaments and Granules) with a predominance of fragments detected on the water surface and filaments detected in sediments as well as a low contribution of granules. This study generated original data on the presence of MPs in sediments and coastal water surfaces of the Tunisian north coast.
    Description: Masters
    Keywords: Microplastiques ; Sédiments ; Eaux de surface ; FTIR-ATR ; Microplastics ; Surface water ; Sediment
    Repository Name: AquaDocs
    Type: Thesis/Dissertation
    Format: 110 pp
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  • 86
    Publication Date: 2024-03-05
    Description: Coral-dwelling gall crabs (Cryptochiridae) are common inhabitants of scleractinian corals. Several species have been described as new in recent years, including Lithoscaptus doughnut, which was described from Hong Kong based on a single female retrieved from the coral Plesiastrea peroni. Here we extend the distribution range of L. doughnut with nine additional localities throughout the Indo-West Pacific, from the Red Sea to the Coral Triangle and Japan. We describe a male specimen of L. doughnut for the first time, based on a specimen from Malaysia, and provide photographs of life and preserved material. Haplotype networks based on COI mtDNA (n = 12) and 16 rRNA sequences (n = 12) were created. We retrieved eleven COI haplotypes and six 16S haplotypes, however no clear geographic distribution pattern was discerned. Intraspecific variation in L. doughnut was 1.4% for COI and 0.2% for 16S. Lastly, the first colour photos and records of associated parasites of this species are provided.
    Keywords: haplotype network ; reef-associated fauna ; Scleractinia ; symbiosis
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 87
    facet.materialart.
    Unknown
    Copernicus GmbH
    In:  EPIC3Geoscientific Model Development, Copernicus GmbH, 17(4), pp. 1709-1727, ISSN: 1991-959X
    Publication Date: 2024-03-05
    Description: 〈jats:p〉Abstract. In this paper we describe the implementation of the carbon isotopes 13C and 14C (radiocarbon) into the marine biogeochemistry model REcoM3. The implementation is tested in long-term equilibrium simulations where REcoM3 is coupled with the ocean general circulation model FESOM2.1, applying a low-resolution configuration and idealized climate forcing. Focusing on the carbon-isotopic composition of dissolved inorganic carbon (δ13CDIC and Δ14CDIC), our model results are largely consistent with reconstructions for the pre-anthropogenic period. Our simulations also exhibit discrepancies, e.g. in upwelling regions and the interior of the North Pacific. Some of these differences are due to the limitations of our ocean circulation model setup, which results in a rather shallow meridional overturning circulation. We additionally study the accuracy of two simplified modelling approaches for dissolved inorganic 14C, which are faster (15 % and about a factor of five, respectively) than the complete consideration of the marine radiocarbon cycle. The accuracy of both simplified approaches is better than 5 %, which should be sufficient for most studies of Δ14CDIC. 〈/jats:p〉
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 88
    Publication Date: 2024-03-05
    Description: A preliminary inventory of the composition of zooplancktonic species found in Bayano Lake, between February and September 1981 revealed that there are seven species of Rotifera, five Cladocera, two Copepoda, one Ostracoda and larvae of Macrobrachium (Decapoda) and Chaoborus (Diptera). The composition, abundance and horizontal and monthly distribution of the most important zooplanktonic groups found in Bayano Lake are here presented.
    Description: Published
    Description: Refereed
    Keywords: Limonology ; Abundancia ; Vertical distribution ; Limnology ; Composición
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.17-24
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  • 89
    facet.materialart.
    Unknown
    Ishizaki Shoten | Tokyo, Japan
    Publication Date: 2024-03-05
    Description: Unpublished
    Description: Not Known
    Keywords: Skipjack ; Katsuwonus pelamis
    Repository Name: AquaDocs
    Type: Book Section
    Format: pp.60,88+
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  • 90
    Publication Date: 2024-03-05
    Description: Este cultivo ha sido tratado por diferentes investigadores, utilizando cuartos climatizados, con diferentes tamaños de peceras para las distintas etapas de crecimiento de la especie, donde se ha determinado la cantidad de huevos o larvas (Stanislav, 1971; Sterba, 1973) la temperatura de desove (Favre, 1970) y la alimentación (Innes, 1966; Mann, 1966).
    Description: Published
    Description: Refereed
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.34-47
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  • 91
    Publication Date: 2024-03-05
    Description: La merluza de Angola (Merluccius polli) habita en casi toda la costa de África centro-occidental. Por su distribución está incluida en las áreas estadísticas de FAO 34 y 47, en el Comité de CECAF al norte de los 6° LS y en ICSEAF al sur.
    Description: Published
    Description: Refereed
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.79-103
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  • 92
    Publication Date: 2024-03-05
    Description: Dadas sus características especiales, la cría de anguila (Anguilla rostrata. Le Sueur) es altamente dependiente del suministro de cantidades apreciables de semillas cuya fuente, cono se conoce, está basada en la pesquería de angulas que provenientes del mar, ascienden en grandes cantidades por algunos ríos de nuestro país. Debido a ésto, cualquier plan de desarrollo sobre la cría de la especie deberá estar avalado por el estudio sistemático de la pesquería, la evaluación de la misma y por la posibilidad de establecer un pronóstico al respecto.
    Description: Published
    Description: Refereed
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.48-61
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  • 93
    Publication Date: 2024-03-05
    Description: El presente estudio tuvo como objetivo determinar las variaciones espacio-temporales de la abundancia del pepino de mar, Isostichopus badionotus, en Arroyos de Mantua, al norte de Pinar del Río, Cuba. Se analizaron las cuotas asignadas y las toneladas capturadas históricamente. Se realizaron muestreos independientes de la pesquería en cinco sitios de pesca de la región. Se determinaron, analizaron y compararon la densidad y potencial pesquero en cada sitio en los años 2017, 2018 y 2019. Tanto la densidad como el potencial pesquero tienden a disminuir en el tiempo. No existe sobrepesca por parte de la empresa que opera en la región, ya que los valores de cuotas no son alcanzados por las capturas de la flota estatal. La pesca ilegal puede ser la causa de la disminución de la abundancia, actuando fundamentalmente en los sitios más cercanos a puerto.
    Description: The present study aims to determine the spatiotemporal variations of the abundance of sea cucumber Isostichopus badionotus in Arroyo de Mantua in the north of Pinar del Río, Cuba. It was determined, analyzed, and compared density and fishing potential in the years 2017, 2018 and 2019 by historical assigned quota and catching, as well as individual sampling in five fishing sites. Results of this investigation demonstrate that density and fishing potential tend to decline over time. Moreover, the fishing company operating in the research area does not overfish as the quota values are not obtained in the catching. Illegal fishing could be the main cause for a decrease in abundance, which affects fundamentally the closest sites to port.
    Description: Published
    Description: Refereed
    Keywords: Densidad ; Potencial pesquero ; Biomasa ; Holoturia ; Density ; Fishery potential ; Biomass ; Holothurian
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.96-102
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  • 94
    Publication Date: 2024-03-05
    Description: Se presenta un inventario preliminar de los principales sistemas lacustres encontrados en la República de Panamá basado en la interpretación cartográfica de los mapas disponibles (IGNTG) y verificación o información de campo recopilada desde 1999. Para cada sistema lacustre se da su nombre, categoría (embalse, laguna o humedal), superficie de agua dulce estimada o informada (ha o km2) ubicación geográfica (distrito, provincia o comarca y coordenadas: latitud N; longitud O) y número de mapa IGNTG en que aparece. Se encontraron un total de 67 sistemas lacustres, ubicados en 39 sitios, totalizando unos 963,15-976,99 km2. Los 11 embalses, llamados lagos, constituyen la categoría mayoritaria con unos 857,74-862,56 km2 de superficie (un 89,0 % del total), las 14 lagunas, mayoritariamente volcánicas, poseen un total de 0,31-0,35 km2 y los 42 humedales totalizan 105,10 km2. Estos últimos constituyen la categoría más variada, e incluye a algunos denominados como lago, lagunas o ciénagas, y comprenden a algunas madreviejas. Existen también unos 141 cuerpos lacustres adicionales ubicados en 69 sitios, los cuales aparecen sin nombrar en los mapas y que requieren confirmar su origen, incluyendo nueve lagunas costeras (tres "Salado"). Adicionalmente, existen unos 150 cuerpos lacustres, que aparecen en 70 sitios, los cuales son artificiales (presa, reservorio, vivero, estanque, etc.).
    Description: ENGLISH ----- A preliminary inventory of the main lake systems found in the Republic of Panama is presented based on the cartographic interpretation of available maps (IGNTG) and verification or field information collected since 1999. For each lake system its name is given, category (package, lagoon or wetland), estimated or informed freshwater surface (ha or km2) geographical location (district, province or region and coordinates: latitude N; longitude O) and IGNTG map number on which it appears. A total of 67 lake systems were found, located at 39 sites, totaling about 963.15-976.99 km2. The 11 reservoirs, called lakes, constitute the majority category with about 857,74-862.56 km2 of an area (89.0 per cent of the total), the 14 mostly volcanic lagoons, have a total of 0.30.35 km2 and the 42 wetlands total 105.10 km2. The latter are the most varied category, and includes some so-called lake, lagoons or swamps, and comprise some mothers. There are also about 141 additional lake bodies located at 69 sites, which appear unnamed on the maps and require confirmation of origin, including nine coastal lagoons (three "Salado"). In addition, there are about 150 lake bodies, which appear in 70 sites, which are artificial (prison, reservoir, nursery, pond, etc.).
    Description: Published
    Description: Refereed
    Keywords: Lake system ; Lago ; Embalse ; Humedal
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.159-171
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  • 95
    Publication Date: 2024-03-05
    Description: Se determinó la composición y la abundancia relativa de las especies de la fauna acompañante de la pesquería de camarón a partir de los cruceros de prospección en las zonas de pesca del golfo de Ana María por la Empresa Pesquera Industrial de Cienfuegos, desde 2017 hasta 2021. La proporción de la captura de fauna acompañante respecto a la de camarón por arrastre es de 20:1, y la subzona de pesca que presenta mayor proporción es la de Manuel Gómez. Se obtuvo un total de 48 especies donde los peces fueron el grupo mejor representado, seguido de crustáceos y los moluscos. Entre los peces, las mojarras y pataos (Fam. Gerreidae) fueron las especies con mayor abundancia relativa y dominancia, seguida de la biajaiba (Lutjanus synagris) y el casabe (Chloroscombrus chrysurus), aparecieron en menor cuantía el clarín (Lepophidium graëllsi) y jeníguano (Haemulon aurolineatum). En el grupo de los crustáceos predominaron los cangrejos manicuris (Lupella forceps), seguida de las esquilas (Squilla spp.) y jaibas (Callinectes spp.) y en menor medida los cangrejos arañas (Stenorynchos seticomis). En los moluscos, el cobo pequeño (Lobatus pugilis) fue la especie más abundante, seguido de la almeja pecten (Pecten zigzag) y en menor medida la almeja blanca (Lima scabra). La elevada proporción FAC/C, la alta abundancia de especies de bajo valor comercial en la captura de la FAC, la presencia de especies oportunistas y la no aparición de grupos susceptibles a perturbaciones por pesca, demuestra el impacto negativo de la pesca en la región.
    Description: The composition and relative abundance of the bycatch species of the shrimp fishery were determined from the prospecting cruises in the fishing areas of the gulf of Ana María by the Cienfuegos Industrial Fishing Company, from 2017 to 2021. Proportion of the bycatch species with respect to the catch of shrimp by trawling is 20:1 and the fishing subarea that presents the highest proportion is that of Manuel Gómez. A total of 48 species were obtained where fish was the best represented group, followed by crustaceans and mollusks. Among the fish, the crappie and kick (Fam. Gerreidae) were the species with the highest relative abundance and dominance, followed by the biajaiba (Lutjanus synagris) and the atlantic bumper (Chloroscombrus chrysurus), the clarion (Lepophidium graëllsi) and jeniguano (Haemulon aurolineatum) appeared to a lesser extent. In the group of crustaceans the manicuris crabs (Lupella forceps) predominated, followed by the skills (Squilla spp.) and crabs (Callinectes spp.) and to a lesser extent the spider crabs (Stenorynchos seticomis). In mollusks, the small conch (Lobatus pugilis) was the most abundant species, followed by the pectin clam (Pecten zigzag) and to a lesser extent, the white clam (Laevicardium spp.). The high proportion of FAC/C, the high abundance of species of low commercial value in the catch of the FAC, the presence of opportunistic species ant the non-appearance of the groups susceptible to disturbance by fisihing, demonstrates the negative impact of the fishing in the region.
    Description: Published
    Description: Refereed
    Keywords: Farfantepenaeus notialis ; Plataforma Surcentral ; EPICIEN ; FAC ; South central platform
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.44-52
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  • 96
    Publication Date: 2024-03-05
    Description: La pesca artesanal en el sistema lagunar del río Cauto es una actividad económica importante que agrupa un alto número de pescadores. Esta se realiza con atarraya de las cuales se determinó la composición por talla de las capturas, la selectividad de las mallas con que están confeccionadas, así como la talla media de selección (L50) de aquellas con malla de 12 y 15 mm. El ajuste a la curva logística mostró que la L50 varió de 5,96 cm en la malla de 12 mm a 6,69 cm en la correspondiente a 15 mm. Los valores del rango de selección (RS) variaron entre 1,15 y 2,07 para la malla de 12 mm y 15 mm respectivamente. Los valores del factor de selección (FS) toman valores entre 4,96 y 4,46 para las mallas de 12 y 15 mm. Los resultados obtenidos muestran la secuencialidad de la pesquería de camarón, impactando negativamente en la población.
    Description: Artisanal fishing in the lagoon system of the Cauto River is an important economic activity that brings together a large number of fishermen. This is done with cast nets whose size composition, the selectivity of the mesh, as well as the average selection size (L50) of those with 12 and 15 mm mesh size. The adjustment to the logistic curve showed that the L50 varied from 5,96 in the 12 mm mesh to 6,69 in the 15 mm mesh. The values of the selection range (RS) varied between 1,15 and 2,07 for the 12 mm and 15 mm mesh, respectively. While the values of the selection factor (FS) take values between 4,96 and 4,46 for the mesh of 12 and 15 mm. The results obtained show the sequential nature of the shrimp fishery, negatively affecting the population.
    Description: Published
    Description: Refereed
    Keywords: Camarón ; Atarraya ; Tamaño de malla ; Selectividad ; L50 ; Shrimp ; Cast net ; Mesh size ; Selectivity
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.64-70
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  • 97
    Publication Date: 2024-03-05
    Description: Con sus 220 km2 la región geográfica de Bahía de Nipe es el mayor acuatorio en su tipo en Cuba, donde se encuentran representaciones de diversos ecosistemas a lo largo de sus costas. Los asentamientos humanos y sus múltiples actividades productivas de importancia y magnitud, le dan a esta bahía relevancia como recurso natural que sustenta usos estratégicos para el país.
    Description: Other
    Keywords: Contaminación ; Metales pesados ; Fuentes contaminantes ; Pesquerías ; Pollution ; Heavy metals ; Plaguicides ; Fisheries ; Plaguicidas ; Sources pollution
    Repository Name: AquaDocs
    Type: Thesis/Dissertation
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  • 98
    Publication Date: 2024-03-05
    Description: La investigación se desarrolló en la cuenca del río Toa, área ubicada en el Norte del Oriente cubano, en el extremo más al Este de las provincias de Holguín y Guantánamo. Los principales objetivos se enfocaron a: inventariar la ictiofauna fluvial del área de la cuenca y determinar los principales riesgos y las perspectivas de conservación de la misma. La metodología utilizada se basó en el análisis cartográfico, el muestreo in situ de los sistemas fluviales contentivos de la cuenca (procederes cuantitativos), el método de opinión de los expertos, la cartografía participativa con conocedores locales (herramientas cualitativas) y los métodos estadísticos descriptivos. Los resultados revelaron que la ictiofauna del área de estudio representó solo el 32,2 % en relación con la cubana en general, el 37,7 % de las especies endémicas y autóctonas evaluadas tienen riesgo alto, las poblaciones naturales de peces fluviales de la cuenca no soportan un uso de subsistencia intensivo, la política de conservación establecida garantiza permanencia y sobrevivencia en el espacio y el tiempo para la ictiofauna del área y cuatro especies, el 25 %, son anquialinas (están parte de su ciclo de vida en agua dulce y salada respectivamente).
    Description: The research was carried out in the Toa river basin, an area located in the North of Eastern Cuba, in the extreme East of the provinces of Holguín and Guantánamo. The main objectives were focused on: inventorying the fluvial ichthyofauna of the basin area and determining the main risks and prospects for its conservation. The methodology used was based on cartographic analysis, in situ sampling of the river systems contained in the basin (quantitative procedures), the expert opinion method, participatory cartography with local connoisseurs (qualitative tools) and descriptive statistical methods. The methodology used was based on cartographic analysis, in situ sampling of the river systems contained in the basin (quantitative procedures), the expert opinion method, participatory cartography with local connoisseurs (qualitative tools) and descriptive statistical methods. The results revealed that the ichthyofauna of the study area represented only 32,2 % in relation to the Cuban one in general, 37,7 % of the endemic and autochthonous species evaluated have high riske, the natural populations of river fish in the basin do not support intensive subsistence use, the established conservation policy guarantees permanence and survival in space and time for the ichthyofauna of the area and four species, 20 % are anchialine, (they are part of their life cycle in fresh and salt water respectively).
    Description: Published
    Description: Refereed
    Keywords: Ictiofauna fluvial ; Cuenca ; Riesgos ; Conservación ; River ichthyofauna ; Basin ; Risks ; Conservation ; Toa basin
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.36-43
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  • 99
    Publication Date: 2024-03-05
    Description: Con el objetivo de evaluar el efecto sobre la supervivencia larval y la obtención de alevines del pargo criollo (Lutjanus analis) en la filial del CIP en Santa Cruz del Sur, Camagüey, se emplearon dos sistemas de cría; cultivo tradicional y con la tecnología de mesocosmos. En el primer sistema se usaron cinco tanques de policarbonato de 0,5 m3 de capacidad en condiciones de ambiente controlado con densidad de siembra inicial de 30 larvas/L. En el cultivo en mesocosmos se utilizó un tanque de concreto de 60 m3 de capacidad en áreas exteriores de la filial con densidad de siembra inicial de 3 larvas/L. En el esquema de alimentación larval tradicional se emplearon rotíferos Brachionus rotundiformes “SS” durante las primeras 17 h y Brachionus plicatilis “L” posteriormente, ambos enriquecidos con el producto comercial ALGAMAC 3000 y alimentados con la microalga Nannochloropsis oculata, mientras que el sistema de mesocosmos se inició con la fertilización inorgánica, el uso de rotíferos Brachionus rotundiformes enriquecidos con ALGAMAC 3000 y copépodos (Acartia sp.) para continuar con el uso de alimento particulado y nauplios de Artemia enriquecida según desarrollo ontogenético. El sistema tradicional de cultivo fue suspendido a los 18 días por ausencia de larvas en los tanques de cría, mientras que en el cultivo en mesocosmos, se alcanzaron sobrevivencias larvales de 40,5 % y rendimientos de 1,2 larvas/L. La sobrevivencia de juveniles al final de la experiencia (60 días después de la eclosión) estuvo en el orden del 17,2 %. La cosecha y biomasa final fue de 0,52 juveniles/L y 0,78 kg/m3 respectivamente.
    Description: In order to evaluate the effect on larval survival to obtaining button snapper (Lutjanus analis) fingerlings in the marine fish culture of Santa Cruz del Sur, Camagüey, two farming systems were used; traditional and Mesocosms systems. Stock density of 30 larvae/controlled environment were set up in five polycarbonate tanks of 0,5 m3 capacity in the traditional system meanwhile 3 larvae/L initial stocking density were stoked in a outdoor concrete tank of 60 m3 capacity to breeding in mesocosms system. Rotifers Brachionus rotundiformes “SS” and Brachionus plicatilis both enriched with commercial product ALGAMAC 3000 and fed with Nannochloropsis oculata microalgae in the traditional feeding larvae scheme were used. Inorganic fertilization, rotifers Brachionus rotundiformes and Artemia nauplii enriched with ALGAMAC 3000 and copepods (Acartia sp.) and particulate feed according to ontogenetic development in the Mesocosms feeding larvae scheme were used. Traditional farming system was suspended after 18 days due larvae absence in breeding tanks. In Mesocosms rearing, larval survival of 40,5 % and yields of 1,2 larvae/L were reached. At the end of the experiment (60 days after hatching), juveniles survival was of 17,2 %. Final harvest showed biomass of 0,52 juveniles/L and 0,78 kg/m3.
    Description: Published
    Description: Refereed
    Keywords: Mesocosmos ; Alimentación larval ; Lutjanus analis ; Mesocosms ; Larvae feeding
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.56-63
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  • 100
    Publication Date: 2024-03-05
    Description: El cobo (Lobatus gigas) es un importante recurso pesquero para Cuba y el Caribe debido a su relevancia económica. El presente trabajo tuvo como objetivo evaluar la calidad microbiológica de la masa de cobo procesada por industrias pesqueras cubanas durante el período 2017-2019. Para ello se determinaron por cada año los microorganismos indicadores: microorganismos a 30 °C (NC ISO 4833-1: 2014), E. coli (NC ISO 7251: 2011) y microorganismos patógenos: Vibrio cholerae y Vibrio parahaemolyticus (UNE-EN ISO 21872: 2018) y Salmonella spp. (NC ISO 6579-1: 2019). Los resultados se compararon con los criterios microbiológicos establecidos en la NC 585: 2017. En los años 2017, 2018 y 2019 se analizaron 40, 35 y 45 muestras respectivamente. Durante el período analizado el indicador con mayores resultados no conformes de acuerdo con la norma cubana NC 585: 2017 fue el de microorganismos a 30 °C. Los conteos de E. coli estuvieron dentro de los límites establecidos por la Norma. Las muestras analizadas en los tres años dieron ausencia de microorganismos patógenos.
    Description: The queen conch (Lobatus gigas) is an important fishery resource for Cuba and the Caribbean due to its economic relevance. The objective of this work was to evaluate the microbiological quality of the queen conch processed by Cuban fishing industries during the 2017-2019 period. For this, the indicator microorganisms were determined for each year: microorganisms at 30 ºC (NC ISO 4833-1: 2014), E. coli (NC ISO 7251: 2011) and pathogenic microorganisms: Vibrio cholerae y Vibrio parahaemolyticus (UNE-EN ISO 21872: 2018) and Salmonella spp. (NC ISO 6579-1: 2019). The results were compared with the microbiological criteria established in NC 585: 2017. In the years 2017, 2018 and 2019, 40, 35 and 45 samples were analyzed, respectively. During the analyzed period, the indicator with the highest non-compliant results according to the Cuban standard NC 585: 2017 was that of microorganisms at 30 ºC. The E. coli counts were within the limits established by the Standard. The samples analysed in the three years gave absence of pathogenic microorganisms.
    Description: Published
    Description: Refereed
    Keywords: Masa de cobo ; Microorganismos a 30 ºC ; Microorganismos patógenos ; Calidad microbiológica ; Cobo dough ; Pathogenic microorganisms ; Microbiological quality
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.71-75
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