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  • OceanRep  (9)
  • 1990-1994  (9)
  • 1
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    Contribution to the knowledge of littoral ascidians (Ascidiacea, Tunicata) of the Senegalese coast (1990)
    IFAN
    In:  Bulletin de l'Institut Fondamental d'Afrique Noire Cheikh Anta Diop : Série A, Sciences de la vie, sciences de la terre, 46A (3-4). pp. 385-402.
    Details
    Publication Date: 2020-06-26
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Epibioses marines: défenses antifouling et molécules d'intéret thérapeutiques (1992)
    Masson
    In:  Journal de pharmacie de Belgique, 47 (4). pp. 364-370.
    Details
    Publication Date: 2020-07-29
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Influence of substratum surface tension on biofouling of artificial substrata in Kiel Bay (Western Baltic):In situstudies (1991)
    Taylor & Francis
    In:  Biofouling, 4 (4). pp. 275-291.
    Details
    Publication Date: 2020-06-19
    Description: The role of substratum surface tension on the colonization process (fouling) on artificial substrata was investigated in Kiel Bay (Western Baltic). The density of organisms from the major groups (bacteria, microalgae, protozoa, macroorganisms) was monitored on test panels after several exposure intervals in two experimental series. The results showed that substrata with a surface free energy of 24 mN/m were initially less densely colonized by representatives of the different fouling groups. The most hydrophobic substrata and those between 31–43 mN/m were heavily colonzied but there was a slight decrease in density towards the most hydrophilic material (glass). After an immersion time of 64 d these differences were not apparent for bacteria, microalgae or protozoa. These results correspond with thermodynamic predictions, which propose minimum bioadhesion on substrata with critical surface tensions between 20–25 mN/m in seawater. In addition, factors other than the surface tension may be important in marine fouling.
    Type: Article , PeerReviewed
    DOI: 10.1080/08927019109378218
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    The littoral Ascidians of the Spanish mediterranean. II. Balearic Islands. Species collected by the R/V "Professeur Georges Petit" (1991)
    Laboratoire Arago
    In:  Vie et Milieu, 41 (2-3). pp. 153-163.
    Details
    Publication Date: 2020-04-29
    Description: An inventory of the rocky infra- and circalittoral bottoms of the Balearic Islands (Spanish Mediterranean), based on SCUBA diving studies performed in 1986, led to a list of 60 ascidian species in this region. Systematic, ecological and biological notes on these species are given in this article.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Chemical control of bacterial epibiosis on ascidians (1994)
    Inter-Research
    In:  Marine Ecology Progress Series, 110 . pp. 45-57.
    Details
    Publication Date: 2020-07-09
    Description: Two co-occurring ascidians of the Pacific subtidal, Polyclinum planum and Cystodytes lobatus, were found to exhibit remarkably different numbers of surface bacteria. On average, epibacterial densities on P. planum were 140 times greater than those on C lobatus as measured by plate-counting methods. Organic extracts of both ascidian species were tested for antimicrobial activities and effects on bacterial settlement. Bacterial settlement was measured using a new bioassay described in this paper. The results of the settlement bioassay clearly demonstrate that extracts of the little-colonized C. lobatus deter bacterial settlement while extracts of the heavily colonized P. planum induce settlement relative to the control. In addition to reducing bacterial settlement, extracts of C. lobatus colonies exhibited varying, but generally low, levels of antiraicrobial activity against, on average, one-half of the 36 strains of marine bacteria tested. On an interspecific level, including 11 ascidian species screened in a pilot study, fouling-deterring activities were correlated with epibacterial abundances while antimicrobial activity was not. It is concluded that the chemical control of bacterial settlement, possibly complemented by antimicrobial toxicity, provides an accurate model to explain the dramatically different bacterial abundance on the surfaces of the ascidian species studied. This investigation presents evidence that non-toxic metabolites influence bacterial settlement and, in this way, may function to regulate bacterial epibiosis on the surfaces of some marine invertebrates.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.3354/meps110045
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Marine epibiosis. II. Reduced fouling on Polysyncraton lacazei (Didemnidae, Tunicata) and proposal of an antifouling potential index (1990)
    Springer
    In:  Oecologia, 82 (2). pp. 275-282.
    Details
    Publication Date: 2020-06-16
    Description: Polysyncraton lacazei is a colonial tunicate (family didemnidae) living in the NW-mediterranean rocky sublitoral. A thorough scanning of numerous colonies revealed that in spite of an apparently heavy local fouling pressure only one fouling species — a kamptozoan — is encountered with some regularity on Polysyncraton. We try to define the epibiotic situation of sessile marine organisms as composed of four epibiotic parameters: longevity or exposure time (A), epibiont load (E), colonizer pool (CP) and fouling-period (FP). Subsequently, these factors are combined to propose an “Antifouling Potential” index: AFP=(1−E/CP)×A/(FP+A). This index is intended to permit evaluating the relative antifouling defense potency to be expected in a given organism in a given epibiotic situation and to compare different cases of epibiosis and fouling.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF00323545
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    Marine epibiosis. IV The periwinkle Littonna littorea lacks typical antifculing defences - why are some populations so little fouled? (1992)
    Inter Research
    In:  Marine Ecology Progress Series, 88 . pp. 225-235.
    Details
    Publication Date: 2014-01-23
    Description: Epibiosis on the shells of Littorina littorea (L.) varies between populations. While snails from the Helgoland intertidal zone (North Sea) rarely carry any epibionts, subtidal snails from the Kiel Bight (Baltic Sea) are frequently fouled. This study shows that L. littorea lacks typical anti-fouling defence adaptations such as mechanical, physical or chemical defences. Our enclosure experiments suggest that epibiosis on the shells is inversely correlated to L. littorea population density. At high densities snails frequently pass over one another and subsequent grazing, bulldozing and/or foot mucus secretion may contribute to the inhibition of epibionts. Consequently, the observed differences in shell epibiosis between the 2 L. littorea populations may to a large extent be explained by considerably higher L. littorea abundances in the Helgoland intertidal zone. Differences in habitat conditions probably play a secondary role. We suggest that the fouling inhibiting factors associated with high population density (mucus secretion, bulldozing, mutual grazing) are to be considered as a biological disturbance which effectively blocks recruitment by most potential colonizers.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.3354/meps088225
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
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    Marine epibiosis. III. Possible antifouling defense adaptations in Polysyncraton lacazei (Giard) (Didemnidae, Ascidiacea) (1991)
    Elsevier
    In:  Journal of Experimental Marine Biology and Ecology, 145 (1). pp. 49-63.
    Details
    Publication Date: 2014-01-23
    Description: Polysyncraton lacazei (Giard), a colonial tunicate of the western Mediterranean, seems to be well-protected against epibiosis. Out of several thousand potential colonizers estimated, only one kamptozoan species, Loxocalyx sp., is found with some regularity (less-than-or-equal-to 21%) on the colonial surface. The results in this paper suggest the existence of overlapping mechanical, chemical and extrinsic adaptations with a good antifouling potential.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/0022-0981(91)90005-H
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 9
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    Ascidien: Entwicklung (1992)
    Fischer
    In:  In: Meeresbiologische Exkursion. , ed. by Emschermann, P., Hoffrichter, O., Körner, H. and Zissler, D. Fischer, Stuttgart, Germany, pp. 163-168. ISBN 3-437-20414-9
    Details
    Publication Date: 2014-01-23
    Type: Book chapter , NonPeerReviewed
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    OceanRep: Book chapter
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