The life cycle of Anisakis simplex in the Norwegian Deep (northern North Sea) (original) (raw)

Abstract

Copepoda (_Calanus finmarchicus n_=1,722, _Paraeuchaeta norvegica n_=1,955), Hyperiidae (_n_=3,019), Euphausiacea (_Meganyctiphanes norvegica n_=4,780), and the fishes Maurolicus muelleri (_n_=500) and Pollachius virens (_n_=33) were collected in the Norwegian Deep (northern North Sea) during summer 2001 to examine the importance of pelagic invertebrates and vertebrates as hosts of Anisakis simplex and their roles in the transfer of this nematode to its final hosts (Cetaceans). Third stage larvae (L3) of A. simplex were found in P. norvegica, M. muelleri and P. virens. The prevalence of A. simplex in dissected P. norvegica was 0.26%, with an intensity of 1. Prevalences in M. muelleri and P. virens were 49.6% and 100.0%, with mean intensities of 1.1–2.6 (total fish length ≥6.0–7.2) and 193.6, respectively. All specimens of C. finmarchicus and M. norvegica examined were free of anisakid nematode species and no other parasites were detected. P. norvegica, which harboured the third stage larvae, is the obligatory first intermediate host of A. simplex in the investigated area. Though there was no apparent development of larvae in M. muelleri, this fish can be considered as the obligatory second intermediate host of A. simplex in the Norwegian Deep. However, it is unlikely that the larva from P. norvegica can be successfully transmitted into the cetacean or pinniped final hosts, where they reach the adult stage. An additional growth phase and a second intermediate host is the next phase in the life cycle. Larger predators such as P. virens serve as paratenic hosts, accumulating the already infective stage from M. muelleri. The oceanic life cycle of A. simplex in the Norwegian Deep is very different in terms of hosts and proposed life cycle patterns of A. simplex from other regions, involving only a few intermediate hosts. In contrast to earlier suggestions, euphausiids have no importance at all for the successful transmission of A. simplex in the Norwegian Deep. This demonstrates that this nematode is able to select definite host species depending on the locality, apparently having a very low level of host specificity. This could explain the wide range of different hosts that have been recorded for this species, and can be seen as the reason for the success of this parasite in reaching its marine mammal final hosts in an oceanic environment.

Access this article

Log in via an institution

Subscribe and save

Buy Now

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

Download references

Acknowledgements

We are grateful to Prof. Dr. Heinz Mehlhorn (Institute of Zoomorphology, Cell Biology and Parasitology, Düsseldorf), Dr. Mark Lenz (Leibniz-Institute of Marine Sciences, Kiel), and Svenja Hauschildt for kindly revising an earlier draft of the manuscript. We are especially thankful to Annett Seehagen for her great assistance in the field and laboratory. The scientific staff, and the crew of R.V. Heincke is thanked for their help during the collection of the material. The present study was supported by the Commission of the European Community (Q5RS-2000-30183, LIFECO) and the international project MAR-ECO coordinated by the University of Bergen and the Institute of Marine Research of Norway.

Author information

Authors and Affiliations

  1. Institute of Zoomorphology, Cell Biology and Parasitology, Heinrich-Heine-University, Universitätsstrasse 1, 40225 , Düsseldorf, Germany
    Sven Klimpel, Harry W. Palm & Sonja Rückert
  2. Faculty of Fisheries and Marine Science, Bogor Agricultural University, Campus IPB Darmaga, 16680 , Bogor, Indonesia
    Harry W. Palm
  3. Research Division 3: Marine Ecology, Leibniz Institute of Marine Sciences, Düsternbrooker Weg 20, 24105 , Kiel, Germany
    Uwe Piatkowski

Authors

  1. Sven Klimpel
  2. Harry W. Palm
  3. Sonja Rückert
  4. Uwe Piatkowski

Corresponding author

Correspondence toSven Klimpel.

Rights and permissions

About this article

Cite this article

Klimpel, S., Palm, H.W., Rückert, S. et al. The life cycle of Anisakis simplex in the Norwegian Deep (northern North Sea).Parasitol Res 94, 1–9 (2004). https://doi.org/10.1007/s00436-004-1154-0

Download citation

Keywords