Summary
On a marine saltmarsh, the intertidal mite, Bdella interrupta Evans, is exposed to periods of regular tidal submergence which alternate with periods of tidal emergence. The mite shows well defined day and night peaks of locomotory activity on the soil surface. During periods of tidal submergence the activity peaks showed an apparent periodicity, of around 12.5 h, characteristic of a tidal rhythm. In the presence of non-submerging tides the periodicity of the activity peaks changed to around 11.5 h. It is suggested that this shorter periodicity results either from free-running of the circatidal clock in the absence of entraining tides or from a sequence of transients that are phaseshifting towards a stable relationship with a second zeitgeber. It is further suggested that the alternation between a ca. 12.5 h and a ca. 11.5 h rhythm ensures that an activity peak is maintained in daylight and, also, reduces the possibility of inundation during the first critical floodings during sequences of rising spring tides.
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Andreasson, S.: Seasonal changes in diel activity of Cottus poecilopus and C. gobio (Pisces) at the Arctic Circle. Oikos 24, 16–23 (1973)
Andreasson, S., Müller, K.: Persistence of the diel activity phase shift in Cottus poecilopus Heckel (Pisces) after transfer from 66° to 55° northern latitude. Oikos 20, 171–174 (1969)
Bovet, J., Oertli, E.F.: Free-running circadian activity rhythms in free-living beavers (Castor canadensis). J. comp. Physiol. 92, 1–10 (1974)
Enright, J.T.: The search for rhythmicity in biological time-series. J. theoret. Biol. 8, 426–468 (1965)
Erkinaro, E.: Der Verlauf desynchronisierter, circadianer Periodik einer Waldmaus (Apodemus flavicollis) in Nordfinnland. Z. vergl. Physiol. 54, 407–410 (1969)
Evans, G.O.: Terrestrial acari new to Britain II. Ann. Mag. nat. Hist. 12(5), 660–675 (1952)
Foster, W.A., Treherne, J.E.: The distribution of an intertidal aphid, Pemphigus trehernei Foster, on marine saltmarshes. Oecologia 21, 141–155 (1975)
Foster, W.A., Treherne, J.E.: Insects of marine saltmarshes: problems and adaptations. Chapter 2 in Marine Insects (L. Cheng, ed.). North-Holland: Amsterdam (1976)
Müller, K.: Jahreszeitliche Wechsel der 24h-Periodik bei der Bachforelle (Salmo trutta L.) am Polarkreis. Oikos 20, 166–170 (1969)
Müller, K.: Die Tages- und Jahresperiodik der Bunttlossenkoppe Cottus poecilopus Heckel am Polarkreis. Oikos 13, 108–121 (1970)
Müller, K.: Seasonal phase shift and the duration of activity time in the burbot, Lota lota (L.) (Pisces, Gadidae). J. comp. Physiol. 84, 357–359 (1973)
Schulte, G.: Gezeitenrhythmische Nahrungsaufnahme und Kotballenablage einer terrestrischen Milbe (Oribatei: Ameronothridae) im marinen Felslitoral. Marine Biology 37, 265–277 (1976)
Treherne, J.E., Foster, W.A.: Diel activity of an intertidal beetle, Dicheirotrichus gustavi Crotch. J. Anim. Ecol. 46, 127–138 (1977)
Treherne, J.E., Foster, W.A.: Adaptive strategies of air-breathing arthropods from marine salt-marshes. Proc. 1st European Ecol. Symp. (ed. R.L. Jefferies, A.J. Davy). (1978)
Treherne, J.E., Foster, W.A., Evans, P.D., Ruscoe, C.N.E.: Free-running activity rhythm in the natural environment. Nature, Lond. 269, 796–797 (1977)
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Foster, W.A., Treherne, J.E., Evans, P.D. et al. Short-term changes in activity rhythms in an intertidal arthropod (Acarina: Bdella interrupta Evans). Oecologia 38, 291–301 (1979). https://doi.org/10.1007/BF00345189
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DOI: https://doi.org/10.1007/BF00345189