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  • 1
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    Regeneration of Mnemiopsis leidyi under different food quantities (2017)
    PANGAEA
    In:  Supplement to: Bading, Katharina Tissy; Kaehlert, Sarah; Chi, Xupeng; Jaspers, Cornelia; Martindale, Mark Q; Javidpour, Jamileh (2017): Food availability drives plastic self-repair response in a basal metazoan- case study on the ctenophore Mnemiopsis leidyi A. Agassiz 1865. Scientific Reports, 7(1), https://doi.org/10.1038/s41598-017-16346-w
    Details
    Publication Date: 2024-03-08
    Description: Many marine invertebrates including ctenophores are capable of extensive body regeneration when injured. However, as for the invasive ctenophore Mnemiopsis leidyi, there is a constant subportion of individuals not undergoing whole body regeneration but forming functionally stable half-animals instead. Yet, the driving factors of this phenomenon have not been addressed so far. This study sheds new light on how differences in food availability affect self-repair choice and regeneration success in cydippid larvae of M. leidyi. As expected, high food availability favored whole-body regeneration. However, under low food conditions half-animals became the preferential self-repair mode. Remarkably, both regenerating and half-animals showed very similar survival chances under respective food quantities. As a consequence of impaired food uptake after injury, degeneration of the digestive system would often occur indicating limited energy storage capacities. Taken together, this indicates that half-animals may represent an alternative energy-saving trajectory which implies self-repair plasticity as an adaptive trade-off between high regeneration costs and low energy storage capacities. We conclude that self-repair plasticity could lead to higher population fitness of ctenophores under adverse conditions such as in ships' ballast water tanks which is postulated to be the major vector source for the species' spreading around the globe.
    Keywords: Experiment day; Food; Group; Identification; Investigator; Recovery Mode; Score; Size; Species; Status; Treatment; Treatment: food
    Type: Dataset
    Format: text/tab-separated-values, 10152 data points
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    DATA PANGAEA
  • 2
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    Food availability drives plastic self-repair response in a basal metazoan- case study on the ctenophore Mnemiopsis leidyi A. Agassiz 1865 (2017)
    Springer Nature
    Details
    Publication Date: 2017-11-27
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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    PAPER CURRENT
  • 3
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    Introducing the Ocean Science Centre Mindelo (OSCM) (2017)
    GEOMAR
    In:  [Video]
    Details
    Publication Date: 2019-09-23
    Description: On November 11, 2017, GEOMAR and INDP celebrated the inauguration of the "Ocean Science Centre Mindelo (OSCM)". After 3 years of planning and construction works the building has now been handed over to science. The tropical and subtropical Northeast Atlantic is a very exciting region for climate research, marine biology, oceanography and many other disciplines. For many years, scientists of the GEOMAR Helmholtz Centre for Ocean Research Kiel have been conducting campaigns in the area. A few years ago, these numerous long-term activities resulted in the planning of a laboratory and workshop building in Mindelo on the Islands of Cabo Verde. The longstanding and spirited cooperation with the Cape Verdean Institute for Fisheries Development, the Instituto Nacional de Desenvolvimento das Pescas (INDP), was an additional driver for this enterprise. About two and a half years ago, the partners were able to start the implementation of the project idea. GEOMAR is contributing a total of 2.5 million euros. The construction comprises a building, equipped with two universal labs, a wet lab, workshops for maintenance and repair of scientific equipment, storage rooms and offices as well as seminar rooms.
    Type: Video , NonPeerReviewed
    Format: video
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    PAPER (OCEANREP)
  • 4
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    Food availability drives plastic self-repair response in a basal metazoan- case study on the ctenophore Mnemiopsis leidyi A. Agassiz 1865 (2017)
    Nature Research
    In:  Scientific Reports, 7 (1). Art.No. 16419.
    Details
    Publication Date: 2020-06-18
    Description: Many marine invertebrates including ctenophores are capable of extensive body regeneration when injured. However, as for the invasive ctenophore Mnemiopsis leidyi, there is a constant subportion of individuals not undergoing whole body regeneration but forming functionally stable half-animals instead. Yet, the driving factors of this phenomenon have not been addressed so far. This study sheds new light on how differences in food availability affect self-repair choice and regeneration success in cydippid larvae of M. leidyi. As expected, high food availability favored whole-body regeneration. However, under low food conditions half-animals became the preferential self-repair mode. Remarkably, both regenerating and half-animals showed very similar survival chances under respective food quantities. As a consequence of impaired food uptake after injury, degeneration of the digestive system would often occur indicating limited energy storage capacities. Taken together, this indicates that half-animals may represent an alternative energy-saving trajectory which implies self-repair plasticity as an adaptive trade-off between high regeneration costs and low energy storage capacities. We conclude that self-repair plasticity could lead to higher population fitness of ctenophores under adverse conditions such as in ships’ ballast water tanks which is postulated to be the major vector source for the species’ spreading around the globe.
    Type: Article , PeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 5
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    Larval reproduction - a life history trait exemplified by the American comb jelly Mnemiopsis leidyi A. Agassiz, 1865 (2015)
    In:  (Master thesis), Christian-Albrechts-Universität Kiel, Kiel, Germany, 85 pp
    Details
    Publication Date: 2016-12-23
    Description: The rate of marine invasions has lately been shown to increase as a consequence of growing anthropogenic transport, increasing globalization and partly due to global change. A prominent example of a marine invasive species is the comb jelly Mnemiopsis leidyi, which successfully invaded northern and southern Europe in two independent invasion events. The species shares a rare life history trait, namely paedogenesis in which larvae reproduce. In this study egg production rates and growth of two invasive populations of M. leidyi from the Baltic and the Caspian Sea were measured, respectively. The approach was organized around answering the following questions: - Do invasive populations of M. leidyi perform larval reproduction? - What is the proportion of larval reproduction within an invasive population? - What could be the trigger to larval reproduction? - What potential ecological impact could larval reproduction have on the invasion potential of the species? - We found reproducing larvae in both invasive populations from a size starting at 2 mm oral - aboral length without a so far described pause in reproduction during metamorphosis. The fraction of reproducing larvae between both populations differed and was 3.3 % and 25.5 % for Baltic Sea and Caspian Sea populations, respectively. Both invasive populations showed judging on the location of reproductive tissue, adult reproduction already in the transitional stage. These results are in contrast to previous findings. Additionally, larvae were found to survive food shortage for longer periods. Larvae of M. leidyi are therefore recognized as potentially playing a key role in the invasion success of M. leidyi as we shall not forget that they are also more robust in comparison to adults because of their great healing and regeneration potential.
    Keywords: Course of study: MSc Biological Oceanography
    Type: Thesis , NonPeerReviewed , info:eu-repo/semantics/other
    Format: text
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    PAPER (OCEANREP)
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