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  • Springer  (6)
  • 2000-2004  (4)
  • 1985-1989  (2)
  • 1
    Electronic Resource
    Electronic Resource
    The recolonization potential of Metridium senile in an area previously depopulated by oxygen deficiency (1985)
    Springer
    Oecologia 67 (1985), S. 255-259 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Every summer the deepest parts of the inner Flensburg fjord are subject to O2-deficiency lasting from a few weeks to several months. In spring, however, populations of Metridium senile can be found in these areas, in spite of the fact that frequently the local anoxic period of the previous summer has been 2–3 times longer than their anoxia LD50-value (3 wks). Responsible for this phenomenon is an intensive recolonization by adult Metridium during autumn and winter. This process has been investigated in an 8 months monitoring from May to December 1981. Results on the recolonization mechanism, the population structure of immigrating anemones and recolonization rate as a function of available hard substratum are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384295
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Relevance of crustacean carapace wettability for fouling (2000)
    Springer
    Hydrobiologia 426 (2000), S. 193-201 
    Details
    ISSN: 1573-5117
    Keywords: crustaceans ; carapace ; biofouling ; surface wettability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Carapace wettability and density of fouling organisms (bacteria, diatoms, protozoa, fungi, macro-organisms) were investigated for 45 crustacean species (Hoplocarida, Decapoda) from 15 families in the Gulf of Thailand. The results show that crustaceans can create and maintain characteristic carapace wettabilities. About 21 species (47%) possess highly wettable carapaces with contact angles below 20°. Contact angles between 20° and 40° were recorded for four species (2%), angles between 40° and 60° for eight species (4%) and from 60° to 70° for 11 (24%) species. One species, Alpheus euphrosyne (Alpheidae, Decapoda), exhibited an extremely low surface wettability (contact angle: 91°). Densities of colonisers and contact angles did not correlate. Very low wettability by water (θ 〉 90°) may only contribute little to fouling reduction in A. euphrosyne which showed the most hydrophobic carapace surface and was colonised by the lowest numbers of bacteria among all species and no other colonisers at all. We conclude that surface wettability is of little relevance for antifouling defence in crustaceans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003918512565
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    Paper (German National Licenses)
    Fulltext
  • 3
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    The recolonization potential of Metridium senile in an area previously depopulated by oxygen deficiency (1985)
    Springer
    In:  Oecologia, 67 (2). pp. 255-259.
    Details
    Publication Date: 2020-06-16
    Description: Every summer the deepest parts of the inner Flensburg fjord are subject to O2-deficiency lasting from a few weeks to several months. In spring, however, populations of Metridium senile can be found in these areas, in spite of the fact that frequently the local anoxic period of the previous summer has been 2–3 times longer than their anoxia LD50-value (3 wks). Responsible for this phenomenon is an intensive recolonization by adult Metridium during autumn and winter. This process has been investigated in an 8 months monitoring from May to December 1981. Results on the recolonization mechanism, the population structure of immigrating anemones and recolonization rate as a function of available hard substratum are presented.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF00384295
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Associational resistance of blue mussels (Mytilus edulis) against starfish (Asterias rubens) predation: relative importance of structural and chemical properties of the epibionts. (2004)
    Springer
    In:  Helgoland Marine Research, 58 (3). pp. 162-167.
    Details
    Publication Date: 2018-05-28
    Description: Several epibiotic species reduce starfish (Asterias rubens) preference for the blue mussel Mytilus edulis in the Baltic. The aim of this study was to reveal whether this associational resistance was caused by structural or chemical aspects of the different epibionts. To assess structural epibiont effects, an in situ experiment was conducted with unfouled mussels and mussels equipped with artificial epibionts ('dummies') exposed to natural predation by A. rubens. The chemically inert dummies closely matched the structural properties of the locally common epibionts Balanus improvisus (barnacle), Ceramium strictum (red alga), Halichondria panicea (sponge), and Laomedea flexuosa (hydrozoan). Starfish fed indiscriminately in all treatments. Chemical effects of epibionts on the attractiveness of mussels for A. rubens were investigated by incorporating freeze-dried epibionts or mussel tissue into Phytagel pellets at natural concentrations. Starfish were allowed to choose among these structurally similar but chemically different prey items in an in vitro experiment. The predators exhibited significant preferences among the food pellets, which closely matched their preferences for corresponding natural mussel-epibiont associations. Thus, chemical aspects of epibionts appear to play a larger role in this associational resistance than do structural aspects. Implications of these indirect interactions for benthic communities are discussed.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s10152-004-0181-7
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Relevance of crustacean carapace wettability for fouling (2000)
    Springer
    In:  Hydrobiologia, 426 . pp. 193-201.
    Details
    Publication Date: 2014-01-23
    Description: Carapace wettability and density of fouling organisms (bacteria, diatoms, protozoa, fungi, macro-organisms) were investigated for 45 crustacean species (Hoplocarida, Decapoda) from 15 families in the Gulf of Thailand. The results show that crustaceans can create and maintain characteristic carapace wettabilities. About 21 species (47 %) possess highly wettable carapaces with contact angles below 20 degrees. Contact angles between 20 degrees and 40 degrees were recorded for four species (2%), angles between 40 degrees and 60 degrees for eight species (4%) and from 60 degrees to 70 degrees for 11 (24%) species. One species, Alpheus euphrosyne (Alpheidae, Decapoda), exhibited an extremely low surface wettability (contact angle: 91 degrees). Densities of colonisers and contact angles did not correlate. Very low wettability by water (theta 〉 90 degrees) may only contribute little to fouling reduction in A. euphrosyne which showed the most hydrophobic carapace surface and was colonised by the lowest numbers of bacteria among all species and no other colonisers at all. We conclude that surface wettability is of little relevance for antifouling defence in crustaceans.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1023/A:1003918512565
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Unknown
    Recruitment preferences of blue mussel spat (Mytilus edulis) for different substrata and microhabitats in the White Sea (2001)
    Springer
    In:  Hydrobiologia, 445 (1-3). pp. 27-35.
    Details
    Publication Date: 2014-01-23
    Description: We tested the assumption that fouling pressure by the blue mussel Mytilus edulis on a small spatial scale - especially onto a given substratum type - is homogeneous. Artificial substrata were exposed to natural recruitment within and outside different microhabitats. These microhabitats were monospecific patches (diameter in the meter range) in a mixed subtidal community composed of the brown algae Laminaria saccharina, and Chorda tomentosa, the green filamentous alga Cladophora rupestris, and the blue mussel Mytilus edulis. While mussel spat settled in all microhabitats, recruitment was far from homogeneous. Within microhabitats, artificial substrata were preferred over living surfaces. Recruitment also differed between microhabitats exhibiting identical preference gradients on living surfaces and associated artificial substrata: recruitment preference for microhabitats increased in the order Laminaria saccharina 〈 control area (stone or mud) 〈 Chorda tomentosa 〈 Cladophora rupestris 〈 Mytilus edulis. In a second experimental approach on a smaller spatial scale (cm range), we assessed mussel recruitment in the vicinity of identical aliquots of some of the microhabitat-constituting species. Again, Laminaria proved to be of least, Cladophora of highest attractiveness. We conclude that primary settlement of mussel spat is not only influenced by the structure of the substratum (e.g. filamentous forms) but additionally by nearby macroorganisms - presumably by exuded chemical cues as suggested by the second experiment.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1023/A:1017502126707
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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