Hydrobiologia

, 529:37 | Cite as

Life cycles of the freshwater, planktonic copepod Cyclops scutifer Sars on a north–south gradient in North America

Article

Abstract

A seasonal cycle longer than one year is exceptional both among marine and freshwater zooplankton, but occurs widely in the freshwater cyclopoid Cyclops scutiferSars. This paper presents the life cycle of this species in eight North American populations in lakes from 42° to 69° N. Five of the populations had life cycles showing a combination of a one and two year cycle. Two populations had a 1-year cycle, and the southernmost had a combination of a 0.5-year and a 1-year cycle. Lengths of cycles increased with latitude and thus inversely with the temperature. Populations in all lakes were divided into a direct and a delayed line of development. Diapause was not documented in any of the lakes.

Keywords

Cyclops scutifer Copepoda seasonal cycle North America north–south gradient 

References

  1. Axelson, J. 1961On the dimorphism in Cyclops scutifer (Sars) and the eyelomorphosis in Daphnia galeata (Sars)Report Institute of Freshwater ResearchDrottningholm16918242Google Scholar
  2. Elgmork, K. 1959Seasonal occurrence of Cyclops strenuus strenuus in relation to environment in small water bodies in southern NorwayFolia Limnologica Scandinavica111196Google Scholar
  3. Elgmork, K. 1962aA bottom sampler for soft mudHydrobiologia20167172Google Scholar
  4. Elgmork, K. 1962bA bottom resting stage in the planktonic freshwater copepod Cyclops scutifer SarsOikos13306310Google Scholar
  5. Elgmork, K. 1967On the distribution and ecology of Cyclops scutifer Sars in New England (Copepoda, Crustacea)Ecology48967971Google Scholar
  6. Elgmork, K. 1980. Evolutionary aspects of diapause in freshwater copepods. In Kerfoot, W. C. (ed.), Evolution and Ecology of Zooplankton Communities. University Press of New England, 411--417.Google Scholar
  7. Elgmork, K. 1981Extraordinary prolongation of the life cycle in a freshwater planktonic copepodHolarctic Ecology4278290Google Scholar
  8. Elgmork, K. 1985Prolonged life cycles in the planktonic copepod Cyclops scutifer SarsVerhandlungen Internationale Verein für Limnologie2231543158Google Scholar
  9. Elgmork, K. 1991Winter reproduction strategies in freshwater cyclopoidsVerhandlungen Internationale Verein für Limnologie2428442846Google Scholar
  10. Elgmork, K. 1996Variation in torpidity of diapause in freshwater cyclopoid copepodsInternational Conference on Diapause. Hydrobiologia3206370Google Scholar
  11. Elgmork, K., Eie, J. A. 1989Two-and three-year life cycles in the planktonic copepod Cyclops scutifer in two high mountain lakesHolarctic Ecology126069Google Scholar
  12. Elgmork, K., Halvorsen, G., Eie, J. A., Langeland, A. 1990Coexistence with similar life cycles in two species of freshwater copepods (Crustacea)Hydrobiologia208187199Google Scholar
  13. Elgmork, K., Halvorsen, G. 1998Intraspecific morphological variation in a freshwater copepod (Crustacea) in relation to geographic distribution and environmentCanadian Journal of Zoology76751762Google Scholar
  14. Elgmork, K., Lie, S. 1998Diapause in the life cycle of Cyclops scutifer (Copepoda) in a meromictic lake and the problem of termination by an internal clockArchiv für Hydrobiologie, Special Issues, Advances in Limnology52371381Google Scholar
  15. Elgmork, K., Langeland, A. L. 1970The number of naupliar␣instars in Cyclopoida (Copepoda)Crustaceana18277282CrossRefGoogle Scholar
  16. Elgmork, K., Langeland, A. 1980Cyclops scutifer Sars – one and two-year life cycles with diapause in the meromictic lake BlankvatnArchiv für Hydrobiologie88178201Google Scholar
  17. Elgmork, K., Nilssen, J. P., Broch, T., Øvrevik, R. 1978Life cycle strategies in neighbouring populations of the copepod Cyclops scutifer SarsVerhandlungen Internationale Verein für Limnologie2025182523Google Scholar
  18. Fullard, H., Darby, H. C. 1970Gyldendal’s World AtlasGyldendal Norsk ForlagOslo176+94Google Scholar
  19. Halvorsen, G., Elgmork, K. 1976Vertical distribution and seasonal cycle of Cyclops scutifer Sars (Crustacea, Copepoda) in two oligotrophic lakes in southern NorwayNorwegian Journal of Zoology24143160Google Scholar
  20. Krylov, P. I., V. R. Alekseev & O. A. Frenkel, 1996. Feeding and digestive activity of cyclopoid copepods in active diapause. In Alekseev, V. R & Fryer, G. (eds). Diapause in the Crustacea, Hydrobiologia 320: 71--79. Google Scholar
  21. Kurenkov, I. I. 1973The biological cycles of pelagic copepods␣in the lakes of KamchatkaHydrobiologia433944Google Scholar
  22. Lindström, T. 1952Sur l’écologie du zooplankton CrustacéInstitute of Freshwater ResearchDrottningholm7016533Google Scholar
  23. Lindström, T. 1958Observations sur les cycles annuels des plancton crustacésInstitute of Freshwater ResearchDrottningholm9914539Google Scholar
  24. Lötmarker, T. 1964Studies on planktonic crustacea in thirteen lakes in northern SwedenInstitute of Freshwater ResearchDrottningholm11318945Google Scholar
  25. McLaren, I. A. 1961A biennial copepod from Lake Hazen, Ellesmere IslandNature189774Google Scholar
  26. McLaren, I. A. 1964Zooplankton of Lake Hazen, Ellesmere Island, and a nearby pond, with special reference to the copepod Cyclops scutifer SarsCanadian Journal of Zoology42613629Google Scholar
  27. Nilssen, J. P., Elgmork, K. 1977Cyclops abyssorum – life cycle dynamics and habitat selectionMem. Ist. Ital. Idrobiol.34197238Google Scholar
  28. Nosova, I. A. 1970Life cycle of Cyclops scutifer Sars (Copepoda, Cyclopoidea) from Kuril Lake (South Kamchatka)Inst. morsk. ryb. Khoz. Okeanograf.38292Google Scholar
  29. Reed, E. B. 1963Records of freshwater Crustacea from Artic and Subarctic CanadaNational Museum of CanadaBulletin2962199Google Scholar

Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  1. 1.Department of Biology, Division of ZoologyUniversity of OsloBlindern, OsloNorway

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