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Antarctic Science Antarctic Science

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Circumpolar occurrence of eugregarinid protozoan Cephaloidophora pacifica associated with Antarctic krill, Euphausia superba

Published online by Cambridge University Press:  27 February 2008

Kunio T. Takahashi ,
Masaki Kobayashi ,
So Kawaguchi ,
Junko Saigusa ,
Atsushi Tanimura ,
Mitsuo Fukuchi ,
Mikio Naganobu  and
Tatsuki Toda
Kunio T. Takahashi*
Affiliation:
Faculty of Engineering, Soka University, 1-236, Tangi-cho, Hachioji, Tokyo 192-8577, Japan
Masaki Kobayashi
Affiliation:
Faculty of Engineering, Soka University, 1-236, Tangi-cho, Hachioji, Tokyo 192-8577, Japan
So Kawaguchi
Affiliation:
Australian Government Antarctic Division, Channel Highway, Kingston, TAS 7050, Australia
Junko Saigusa
Affiliation:
Faculty of Engineering, Soka University, 1-236, Tangi-cho, Hachioji, Tokyo 192-8577, Japan
Atsushi Tanimura
Affiliation:
Faculty of Bioresources, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan
Mitsuo Fukuchi
Affiliation:
National Institute of Polar Research, 9-10 Kaga 1-chome, Itabashi-ku, Tokyo 173-8515, Japan
Mikio Naganobu
Affiliation:
National Research Institute of Far Seas Fisheries, 5-7-1 Orido, Shimizu-ku, Shizuoka-shi, Shizuoka 424-8633, Japan
Tatsuki Toda
Affiliation:
Faculty of Engineering, Soka University, 1-236, Tangi-cho, Hachioji, Tokyo 192-8577, Japan
*
*current address: Australian Government Antarctic Division, Channel Highway, Kingston, TAS 7050, Australiakunio.takahashi@aad.gov.au
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Abstract

The geographical distribution of protozoan parasite Cephaloidophora pacifica Avdeev (Order Eugregarininda) associated with Antarctic krill, Euphausia superba, was examined in samples collected from the vicinity of the Antarctic Peninsula, near Syowa Station, and Pacific and Indian sectors of the Southern Ocean. Cephaloidophora pacifica was found at all stations around the Antarctic, with 96.4% of the euphausiids infected (n = 195). The numbers of C. pacifica per krill ranged from 0 to 8089 krill-1, and the average was 350.0 ± 787.8 (mean ± SD). The frequency distributions of C. pacifica showed an overdispersed parasite population (i.e. the variance was greater than the mean) at all locations. Statistical analysis showed that whilst the geographical location did not have a significant effect on intensity of C. pacifica the maturity stage of krill did, with an increasing intensity of infection as krill matures. The infestation of E. superba by eugregarinid protozoan is considered to be a circum-Antarctic phenomenon, and it occurs equally throughout the Southern Ocean.

Keywords

Cephaloidophora indicageographical distributionmaturity stageparasiteSouthern Ocean
Type
Biological Sciences
Information
Antarctic Science , Volume 20 , Issue 5 , October 2008 , pp. 437 - 440
Copyright
Copyright © Antarctic Science Ltd 2008

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References

Avdeev, V.V. 1985. New species of gregarines of genus Cephaloidophora: parasites of Euphausia superba. Parazitologiya 19, 72–75. [in Russian with English abstract.]Google Scholar
Avdeev, V.V. 1987. Certain specific characteristics of the development of gregarine Cephaloidophora pacifica, a parasite of Euphausia superba. Parazitologiya, 21, 580–582. [in Russian with English abstract.]Google Scholar
Avdeev, V.V. & Vagin, A.V. 1987. On the pathogenic effect of Cephaloidophora pacifica Avdeev on Euphausia superba Dana. Parazitologiya, 21, 741–743. [in Russian with English abstract.]Google Scholar
Boxshall, G.A. 1974. The population dynamics of Lepeophtheirus pectoralis (Müller): dispersion pattern. Parasitology, 69, 373–390.CrossRefGoogle ScholarPubMed
Bush, A.O., Lafferty, K.D., Lotz, J.M. & Shostak, A.W. 1997. Parasitology meets ecology on its own terms: Margolis et al. revisited. Journal of Parasitology, 83, 575–583.CrossRefGoogle Scholar
Dolzhenkov, V.N., Avdeev, V.V., & Timonin, V.P. 1987. On population structure of Euphausia superba Dana. In Biology and oceanography studies in the Pacific sector of Antarctica. Moscow: VNIRO and TINRO Research Institutes, 176–186. [in Russian.]Google Scholar
Hausmann, K. & Hülsmann, N. 1996. Protozoology, 2nd ed.New York: Thieme, 338 pp.Google Scholar
Hempel, G. 1985. Antarctic marine food web. In Siegfried, W.R., Condy, P.R. & Laws, R.M., eds. Antarctic nutrient cycles and food webs. Berlin: Springer, 266–270.CrossRefGoogle Scholar
Hoshide, K. & Todd, K.S. 1993. Morphology of the Gametocysts and Oocysts of Gregarina korogi Hoshide (Apicomplexa, Eugregarinorida). Acta Protozoologia, 32, 17–26.Google Scholar
Jakob, G. 1987. Morphological and ecological studies of Clavella adunca (Copepoda, Lernaeopodidae) on polar cod, Boreogadus saida. Sarsia, 72, 291–297.Google Scholar
Japan Marine Fishery Resources Research Center. 1978. Report of the research on commercialization of new fishing grounds for Antarctic krill. Tokyo: Japan Marine Fishery Resources Research Center, 109 pp. [in Japanese.]Google Scholar
Makarov, R.R. & Denys, C.J. 1981. Stages of sexual maturity of Euphausia superba Dana. BIOMASS Handbook, 11, 1–13.Google Scholar
Miller, D.G.M. 1983. Variation in body length measurement of Euphausia superba Dana. Polar Biology, 2, 17–20.CrossRefGoogle Scholar
National Research Institute of Far Seas Fisheries. 1995. Report of the RV Kaiyo-Maru Antarctic cruise in 1994/95. Shimizu: Japan Fishery Agency, 256 pp. [in Japanese.]Google Scholar
Siegel, V. 1982. Relationship of various length measurements of Euphausia superba Dana. Meeresforschung, 29, 114–117.Google Scholar
Takahashi, K.T., Kawaguchi, S., Kobayashi, M. & Toda, T. 2003. Parasitic eugregarines change their spatial distribution within the host digestive tract of Antarctic krill, Euphausia superba. Polar Biology, 26, 468–473.Google Scholar
Takahashi, K.T., Kawaguchi, S., Kobayashi, M. & Toda, T. 2004. The variability in abundance of eugregarines living in the Antarctic krill. Polar Bioscience, 17, 16–25.Google Scholar
Tanner, C.E., Curtis, M.A., Sole, T.D. & Gyapay, K. 1980. The nonrandom, negative binomial distribution of experimental trichinellosis in rabbits. Journal of Parasitology, 66, 802–805.CrossRefGoogle ScholarPubMed
Théodoridès, J. 1989. Parasitology of marine zooplankton. Advances in Marine Biology, 25, 117–177.CrossRefGoogle Scholar
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