, Volume 446, Issue 1, pp 29–34

The relationship between Trichocerca pusilla (Jennings), Aulacoseira spp. and water temperature in Loch Leven, Scotland, U.K.

  • Linda May
  • A.E. Bailey-Watts
  • A. Kirika


Loch Leven is a shallow, eutrophic lake in the Scottish lowlands that is famous for its brown trout (Salmo trutta L.) fishery. Studies of planktonic rotifer populations began here in January 1977. Since then, samples have been collected and analysed at more or less weekly intervals. Additional information on the composition and abundance of phytoplankton and crustacean zooplankton species, and on a variety of physical and chemical determinants, has been recorded on each sampling occasion.

Long-term datasets, such as that described above, are invaluable for identifying interactions between components of the plankton that only appear for short periods each year, as these interactions would probably be overlooked in data spanning a shorter period of time. This study uses the long-term data from Loch Leven to examine the food and temperature requirements of the summer rotifer species Trichocerca pusilla (Lauterborn). The results suggest that T. pusilla prefers water temperatures above 12 °C and that it feeds, primarily, on the filamentous diatom Aulacoseira spp. During the summer months, its abundance was closely related to the availability of this diatom. When filaments of Aulacoseira spp. were abundant, rotifer densities reached 1000–3000 ind. l−1 and when they were scarce (e.g. 1980, 1997 and 1998) T. pusilla densities also remained low (i.e. less than 100 ind. l−1). The reason for the success or failure of Aulacoseira during the summer months each year is unclear but, in general, its abundance was related to the availability of dissolved silica in the water.

Trichocerca pusilla rotifer Aulacoseira diatom grazing silica water temperature Loch Leven 


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  1. Bailey-Watts, A. E. & J. W. G. Lund, 1973. Observations on a diatom bloom in Loch Leven, Scotland. Biol. J. linn. Soc. 5: 235–253.Google Scholar
  2. Bailey-Watts, A. E., 1976a. Planktonic diatoms and silica in Loch Leven, Scotland: a one month silica budget. Freshwat. Biol. 6: 203–213.Google Scholar
  3. Bailey-Watts, A. E., 1976b. Planktonic diatoms and some diatomsilica relations in a shallow eutrophic Scottish loch. Freshwat. Biol. 6: 69–80.Google Scholar
  4. De Beauchamp, P., 1909. Recherches sur les Rotifères: les formations tégumentaires at l'appareil digestif. Arch. Zool. exp. gJn. 10: 1–410.Google Scholar
  5. Bērzinš, B. & B. Pejler, 1989. Rotifer occurrence in relation to temperature. Hydrobiologia 175: 223–231.Google Scholar
  6. Carlin, B., 1943. Die Planktonrotatorien des Motalaström: zur taxonomie und Ökologie der Planktonrotatorien. Medd. Lunds Univ. limnol. Inst. 5: 1–255.Google Scholar
  7. Golterman, H. L., R. S. Clymo & M. A. M. Olmstad, 1978. Methods for the Physical and Chemical Analysis of Freshwaters. 2nd edn. Publ. Blackwell, Oxford.Google Scholar
  8. Jennings, H. S., 1903. Rotatoria of the United States. II. A monograph of the Rattulidae. Bull. U.S. Fish Comm.: 273–352.Google Scholar
  9. Koste, W., 1976. Rotatoria: Die Rädertiere Mitteleuropas. Publ. Gebrhder Borntraeger, Berlin: 673 pp.Google Scholar
  10. LLCMP (Loch Leven Catchment Management Project), 1999. The Loch Leven Catchment Management Plan: 93 pp.Google Scholar
  11. Lund, J. W. G., 1949. Studies on Asterionella I. The origin and nature of the cells producing seasonal maxima. J. Ecol. 37: 389–419.Google Scholar
  12. Lund, J. W. G., 1959. A simple counting chamber for nannoplankton. Limnol. Oceanogr. 4: 5–75.Google Scholar
  13. Lund, J. W. G., 1962. Concerning a counting chamber for nannoplankton described previously. Limnol. Oceanogr. 7: 261–262.Google Scholar
  14. May, L., 1980. Ecology of planktonic rotifers at Loch Leven, Kinross-shire. Ph.D Thesis, Paisley College of Technology: 180 pp.Google Scholar
  15. May, L., 1983. Rotifer occurrence in relation to water temperature in Loch Leven, Scotland. Hydrobiologia 104: 311–315.Google Scholar
  16. May, L., 1985. The use of procaine hydrochloride in the preparation of rotifer samples for counting. Verh. int. Ver. Limnol. 22: 2987–2990.Google Scholar
  17. May, L., 1987. Effect of incubation temperature on the hatching of resting eggs collected from sediments. Hydrobiologia 147: 335–338.Google Scholar
  18. Pourriot, R., 1970. Quelques Trichocerca (Rotifères) et leurs régime alimentaires. Ann. Hydrobiol. 1: 155–171.Google Scholar
  19. Rutkowski, E. W., 1980. Studies on the feeding of Cyclops abyssorum Sars in Loch Leven, Kinross-shire, Scotland. MSc. Thesis, University of Stirling: 126 pp., 4 Appendices.Google Scholar
  20. Ruttner-Kolisko, A., 1974. Plankton Rotifers: biology and Taxonomy. Die Binnengewässer, volume 26, supplement. Publ. Gebrüder Ranz, Dietenkeim: 146 pp.Google Scholar
  21. Smith, I. R., 1974. The structure and physical environment of Loch Leven, Scotland. Proc. r. Soc. Edinb. (B) 74: 81–100.Google Scholar
  22. Youngman, R. E., 1971. Algal monitoring of water supply reservoirs and rivers. Water Research Association TM63. The Water Research Association, Medmenham.Google Scholar

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Linda May
    • 1
  • A.E. Bailey-Watts
    • 2
  • A. Kirika
    • 2
  1. 1.Edinburgh Research StationCentre for Ecology and HydrologyMidlothianScotland, U.K.
  2. 2.Edinburgh Research StationCentre for Ecology and HydrologyMidlothianScotland, U.K

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