Abstract
Water current in 4 species of ascidians (Ascidia mentula Müller, 1776; Phallusia mammillata Cuvier, 1815; Styela plicata (Lesueur, 1823) and Microcosmus sabatieri Roule, 1885) has been recorded for the first time in situ with hot film probes. The mathematical treatment of probe calibration has allowed the evaluation of the characteristics of currents (minimal, maximal and average velocities) and the calculation of pumping rates. The method utilized yields qualitative and quantitative results: Pumping is continuous, and no particular rhythm shows up in the curves obtained. The velocity of the current does not change in the course of a recording, but it can vary from one experiment to another in the same individual; these variations are related to the variability of the diameter of the cloacal siphon rather than to a change in the rhythm of the ciliary activity. The average velocities are 3.42 cm sec-1 for A. mentula, 3.92 for P. mammillata, 3.30 for S. plicata and 3.79 for M. sabatieri. The pumping rates are fairly constant for the same individual. The means, expressed as ml x h-1 x g-1 organ dry weight are 3422 for A. mentula, 2070 for P. mammillata, 4892 for S. plicata and 3084 for M. sabatieri.
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Literature Cited
Ali, R.M.: The influence of suspension density and temperature on the filtration rate of Hiatella arctica. Mar. Biol. 6, 291–302 (1970)
Davids, C.: The influence of suspensions of microorganisms of different concentrations on the pumping and retention of food by mussel (Mytilus edulis L.). Neth. J. Sea Res. 2, 233–249 (1964)
Ezraty, R.: Sur la mesure de caractéristiques turbulentes dans les écoulements d'eau, 78 pp. Thèse Doctorat, 3° cycle Université Aix-Marseille 1970
Fiala-Médioni, A.: Ethologie alimentaire d'invertébrés benthiques filtreurs (ascidies). II. Variation des taux de filtration et de digestion en fonction de l'espèce. Mar. Biol. 28, 199–206 (1974)
Goodbody, I. and E.R. Trueman: Observation on the hydraulics of Ascidia. Nature, Lond. 224, 85–86 (1969)
Haven, D.S. and R. Morales-Alamo: Filtration of particles from suspension by the American oyster Crassostrea virginica. Biol. Bull. mar. biol. Lab., Woods Hole 139, 248–264 (1970)
Hecht, S.: The water current produced by Ascidia atra Lesueur. J. exp. Zool. 20, 429–434 (1916)
Hersh, G.L.: A method for the study of the water currents of invertebrate ciliary filter-feeders. Veliger 2, 77–83 (1960)
Hinze, J.O.: Turbulence. An introduction to its mechanism and theory, 586 pp. New York: Mac-Graw Hill Book Co. 1959
Holmes, N.: Water transport in the ascidians Styela clava Herdman and Ascidiella aspersa (Müller). J. exp. mar. Biol. Ecol. 11, 1–13 (1973)
Hoyle, G.: Spontaneous squirting of an ascidian Phallusia mammillata Cuvier. J. mar. biol. Ass. U.K. 31, 541–562 (1953)
MacCammon, H.M.: Filtering currents in brachiopods measured with a thermistor flowmeter. Ocean Sci. Ocean Engng 2, 772–779 (1965)
—: Behaviour in the brachiopod Terebratulina septentrionalis (Couthouy). J. exp. mar. Biol. Ecol. 6, 35–45 (1971)
Mathäus, W.: Die Viskosität des Meerwassers. Beitr. Meeresk. 29, 93–107 (1972)
Morrow, T.B. and S.J. Kline: The evaluation and use of hot-wire and hot film anemometers in liquids. Report MD-25. Thermosciences Division, Department of Mechanical Engineering, University of Stanford 1971
Reiswig, H.M.: In situ pumping activities of tropical Demospongiae. Mar. Biol. 9, 38–50 (1971)
—: Water transport, respiration and energetics of three tropical marine sponges. J. exp. mar. Biol. Ecol. 14, 231–250 (1974)
Resch, F.: Etudes sur le fil chaud et le film chaud dans l'eau, 89 pp. Thèse Doctorat, Ingénieur Université Aix-Marseille 1968
Revault d'Allonnes, M.: Etude et mise au point des méthodes de mesures au film chaud de la turbulence dans l'eau de mer, 65 pp. Thèse Doctorat, 3° cycle Université Paris 1970
Winter, J.E.: Über den Einfluß der Nahrungskonzentration und anderer Faktoren auf Filtrierleistung und Nahrungsausnutzung der Muscheln Arctica islandica und Modiolus modiolus. Mar. Biol. 4, 87–135 (1969)
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Communicated by J.M. Pérès, Marseille
This work was supported by the C.N.R.S. (L.A. No. 117) and C.N.E.X.O. (Convention No. 76/1497).
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Fiala-Médioni, A. Filter-feeding ethology of benthic invertebrates (Ascidians). III. Recording of water current in situ — Rate and rhythm of pumping. Mar. Biol. 45, 185–190 (1978). https://doi.org/10.1007/BF00390554
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DOI: https://doi.org/10.1007/BF00390554