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  • 1
    Publication Date: 2022-05-17
    Description: Von März bis August wurde zehnmal bei fünf Stationen in der Schlei die Besiedlung der Copepoden durch Myoschiston centropagidarum untersucht. Für den häufigsten Copepoden, Eurytemora affinis, wurde aus der Verteilung der Entwicklungsstadien und der Dauer der einzelnen Stadien der Entwicklungszustand der Population rekonstruiert. Zusätzlich wurde die Eiproduktion und die Änderung der Körpergröße untersucht. Für Acartia tonsa, die im Sommer Eurytemora ablöste, wurde nur die Verteilung der Stadien ermittelt. Die Besiedlung durch Myochiston wurde für jedes Stadium bestimmt. Zum Verständnis der Besiedlung reichte die vorgefundene Populationsstruktur nicht aus. Auf den beiden Stationen mit dem geringsten Salzgehalt, wo die Copepodenpopulationen sich auf Grund der Strömungsverhältnisse ungestört entwickelten, konnte die Besiedlung klar aus der Vorgeschichte der Copepodenpopulation abgeleitet werden. Eine optimale Besiedlung ergab sich, wenn sich eine Copepodengeneration ihrem Ende näherte und kurz nach dem Ende einer Generation. Myoschiston centropagidarum ist spezifisch für die beiden dominanten Arten Eurytemora affinis und Acartia tonsa und kann deshalb während des ganzen Jahres seinen Lebensraum besiedeln. From March to August samples were taken on ten occasions at five stations in the Schlei to investigate the infestation of the copepods by Myoschiston centropagidarum. For the most abundant form Eurytemora affinis the history of the population was computed from the distribution and the life span of the different developmental stages. The egg production and change in size were measured. For Acartia tonsa, which replaced Eurytemora during summer, only the distribution of the different stages was determined. The degree of infestation with Myoschiston was measured for each stage. However, the determined population structure was not sufficient to explain the infestation. At the two innermost stations, where the populations were not disturbed by currents, the infestation could be related to the history of the copepod populations. The most epizoes could be found at the end of a generation or the beginning of a new one. Myoschiston centropagidarum is specific to the two dominant copepods Eurytemora affinis and Acartia tonsa and can therefore be found all the year round.
    Type: Article , NonPeerReviewed
    Format: text
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  • 2
    Publication Date: 2016-01-13
    Description: Optic technologies and methods/procedures are established across all areas and scales in limnic and marine research in Germany and develop further continuously. The working group “Aquatic Optic Technologies” (AOT) constitutes a common platform for knowledge transfer among scientists and users, provides a synergistic environment for the national developer community and will enhance the international visibility of the German activities in this field. This document summarizes the AOT-procedures and -techniques applied by national research institutions. We expect to initiate a trend towards harmonization across institutes. This will facilitate the establishment of open standards, provide better access to documentation, and render technical assistance for systems integration. The document consists of the parts: Platforms and carrier systems outlines the main application areas and the used technologies. Focus parameters specifies the parameters measured by means of optical methods/techniques and indicates to which extent these parameters have a socio-political dimension. Methods presents the individual optical sensors and their underlying physical methods. Similarities denominates the common space of AOT-techniques and applications. National developments lists projects and developer groups in Germany designing optical hightechnologies for limnic and marine scientific purposes.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , notRev
    Format: application/pdf
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