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Résultats obtenus par l'emploi de la photographie sous-marine sur les fonds du large de Roscoff
Cabioch, L. (1967). Résultats obtenus par l'emploi de la photographie sous-marine sur les fonds du large de Roscoff, in: Kinne, O. et al. (Ed.) Vorträge und Diskussionen. Erstes Europäisches Symposion über Meeresbiologie = Papers and discussions. First European Symposium on Marine Biology = Rapports et discussions. Premier symposium européen sur biologie marine. Helgoländer Wissenschaftliche Meeresuntersuchungen, 15(1-4): pp. 361-370. dx.doi.org/10.1007/BF01618633
In: Kinne, O.; Aurich, H. (Ed.) (1967). Vorträge und Diskussionen. Erstes Europäisches Symposion über Meeresbiologie = Papers and discussions. First European Symposium on Marine Biology = Rapports et discussions. Premier symposium européen sur biologie marine. Helgoländer Wissenschaftliche Meeresuntersuchungen, 15(1-4). Biologische Anstalt Helgoland: Hamburg. 669 pp., more
In: Helgoländer Wissenschaftliche Meeresuntersuchungen. Biologische Anstalt Helgoland: Hamburg. ISSN 0017-9957, more
Peer reviewed article  

Also published as
  • Cabioch, L. (1967). Résultats obtenus par l'emploi de la photographie sous-marine sur les fonds du large de Roscoff. Helgol. Wiss. Meeresunters. 15(1-4): 361-370. dx.doi.org/10.1007/BF01618633, more

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Keyword
    Marine

Author  Top 
  • Cabioch, L.

Abstract
    An underwater camera has been used for the study of the sea-bottom of the Channel, near Roscoff. Together with observations on the dimensions of the boulders, which are scattered over the bottom, the analysis of the photographs shows that the main features of the benthic populations and their distribution have not changed since 1959, when they were studied by systematic dredgings. Examples of uniformity or local variability of the populations are given, and the sharpness of the boundaries of the agglomerations ofOphiothrix fragilis is shown. Some features of the behaviour of the benthic animals have been observed:Ophiothrix fragilis assume a ldquofeeding posturerdquo, with their arms upswept, when the speed of the tidal stream is lower than 0.8 knots; the downfall of the food particles is then easier.O. fragilis creep on the substratum when the water current exceeds 0.8 knots.

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