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Hydrobiologia

, Volume 385, Issue 1–3, pp 183–192 | Cite as

Blooms of tunicates Oikopleura spp. and Dolioletta gegenbauri in the Seto Inland Sea, Japan, during summer

  • Yasuo Nakamura
Article

Abstract

The ecological importance of appendicularians Oikopleura dioica and O. longicauda, and a doliolid Dolioletta gegenbauri as metazoan secondary producers was assessed in summer 1997 in the Seto Inland Sea, Japan. Blooms by the appendicularians occurred twice within a month following peaks of pico-/nanoplankton biomass. The biomass of Oikopleura spp. averaged over the water column (<B> ranged 0.1 to 8.0 μgC l-1 and temporal average of <B> over the survey period (\( < \bar B > \)) was 3.2 μgC l-1, 70% of \( < \bar B > \) for calanoid copepods. Furthermore, the temporal average of the production for Oikopleura spp. was 2.4 times higher than that for calanoids, reflecting the extraordinary high growth rates of the appendicularians. D. gegenbauri developed its population following a diatom bloom and <B> reached to 37 μgC l-1 at the peak time. Although individuals of D. gegenbauri were seldom observed during the first half of the survey, \( < \bar B > \) for the doliolid (8.4 μgC l-1) nearly doubled that for calanoids. These results indicate that the gelatinous tunicates Oikopleura spp. and D. gegenbauri play important roles as metazoan secondary producers in the Seto Inland Sea during summer.

tunicates appendicularians doliolids Oikopleura Dolioletta Seto Inland Sea 

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References

  1. Alldredge, A.L., 1976. Field behaviour and adaptive strategies of appendicularians (Chordata; Tunicata). Mar. Biol. 38: 29–39.CrossRefGoogle Scholar
  2. Alldredge, A.L., 1981. The impact of appendicularian grazing on natural food concentrations in situ. Limnol. Oceanogr. 26: 247- 257.CrossRefGoogle Scholar
  3. Alldredge, A.L. & L.P. Madin, 1982. Pelagic tunicates: unique herbivores in the marine plankton. BioScience 32: 655–663.CrossRefGoogle Scholar
  4. Crocker, K.M., A.L. Alldredge & D.K. Steinberg, 1991. Feeding rates of the doliolid, Dolioletta gegenbauri, on diatoms and bacteria. J. Plankton Res. 13: 77–82.Google Scholar
  5. Deibel, D., 1982a. Laboratory determined mortality, fecundity and growth rates of Thalia democratica Forskal and Dolioletta gegenbauri Uljanin (Tunicata,Thaliacea). J. Plankton Res. 4: 143–153.Google Scholar
  6. Deibel, D., 1982b. Laboratory-measured grazing and ingestion rates of the salp, Thalia democratica Forskal, and the doliolid, Dolioletta gegenbauri Uljanin (Tunicata, Thaliacea). J. Plankton Res. 4: 189–201.Google Scholar
  7. Deibel, D., 1985. Blooms of the pelagic tunicate, Dolioletta gegenbauri: are they associated with Gulf Stream frontal eddies? J. Mar. Res. 43: 211–236.CrossRefGoogle Scholar
  8. Flood, P.R., 1978. Filter characteristics of appendicularian food catching nets. Experientia 34: 173–175.CrossRefGoogle Scholar
  9. Hirota, R., 1979. Seasonal occurrence of zooplankton at a definite station off Mukaishima from July of 1976 to June of 1977. Publ. Amakusa Mar. Biol. Lab. 5: 9–17.Google Scholar
  10. Hopcroft, R.R. & J.C. Roff, 1995. Zooplankton growth rates: extraordinary production by the larvacean Oikopleura dioica in tropical waters. J. Plankton Res. 17: 205–220.Google Scholar
  11. Hopcroft, R.R. & J.C. Roff, 1998. Production of tropical larvaceans in Kingston Harbour, Jamaica: are we ignoring an important secondary producer? J. Plankton Res. 20: 557–569.Google Scholar
  12. Hopcroft, R.R., J.C. Roff & H.A. Bauman, 1998. Zooplankton growth rates: the larvaceans Appendicularia, Fritillaria and Oikopleura in tropical waters. J. Plankton Res. 20: 539–555Google Scholar
  13. King, K.R., J.T. Hollibaugh & F. Azam, 1980. Predator-prey interactions between the larvacean Oikopleura dioica and bacterioplankton in enclosed water columns. Mar. Biol. 56: 49–57.CrossRefGoogle Scholar
  14. Koshikawa, H., S. Harada, M. Watanabe, K. Sato & K. Akehata, 1996. Relative contribution of bacterial and photosynthetic production to metazooplankton as carbon sources. J. Plankton Res. 18: 2269–2281.Google Scholar
  15. Madin, L.P., J.E. Purcell & C.B. Miller, 1997. Abundance and grazing effects of Cyclosalpa bakeri in the subarctic Pacific. Mar. Ecol. Prog. Ser. 157: 175–183.Google Scholar
  16. Nakamura, Y., 1998. Biomass, grazing and production of a large heterotrophic dinoflagellate Noctiluca scintillans. J. Plankton Res. 20: 2213–2222.Google Scholar
  17. Nakamura, Y., S. Sasaki, J. Hiromi & K. Fukami, 1993. Dynamics of picocyanobacteria in the Seto Inland Sea (Japan) during summer. Mar. Ecol.Prog. Ser. 96: 117–124.Google Scholar
  18. Nakamura, Y., S. Suzuki & J. Hiromi, 1995. Population dynamics of heterotrophic dinoflagellates during a Gymnodinium mikimotoi red tide in the Seto Inland Sea. Mar. Ecol. Prog. Ser. 125: 269- 277.Google Scholar
  19. Nakamura, Y., S. Suzuki & J. Hiromi, 1996. Development and collapse of a Gymnodinium mikimotoi red tide in the Seto Inland Sea. Aquat. Microb. Ecol. 10: 131–137.Google Scholar
  20. Nakamura, Y., K. Suzuki, S. Suzuki & J. Hiromi, 1997. Production of Oikopleura dioica (Appendicularia) following a picoplankton’ bloom’ in a eutrophic coastal area. J. Plankton Res. 19: 113- 124.Google Scholar
  21. Paffenhöfer, G.-A., 1976. On the biology of Appendicularia of the southeastern North Sea. In Persoone, G. & E. Jaspers (eds), 10th European Symposium on Marine Biology. Universa Press, Wetteren, Belgium: 437–455.Google Scholar
  22. Shanks, A. & K. Walters, 1996. Feeding by a heterotrophic dinoflagellate (Noctiluca scintillans) in marine snow. Limnol. Oceanogr. 41: 177–181.CrossRefGoogle Scholar
  23. Uonani, I., A. Izuha & K. Asai, 1978. Food habits and selective feeding of anchovy larvae (Engraulis japonica). Bull. Jap. Soc. Sci. Fish. 44: 427–434 (in Japanese with English abstract).Google Scholar
  24. Uye, S., 1982. Length-weight relationships of important zooplankton from the Inland Sea of Japan. J. Oceanogr. Soc. Japan 38: 149–158.CrossRefGoogle Scholar
  25. Uye. S., 1991. Temperature-dependent development and growth of the planktonic copepod Paracalanus sp. in the laboratory. Bull. Plankton Soc. Japan (Special volume): 627–636.Google Scholar
  26. Uye, S. & S. Ichino, 1995. Seasonal variations in abundance, size composition, biomass and production rate of Oikopleura dioica (Fol) (Tunicata: Appendicularia) in a temperate eutrophic inlet. J. Exp. Mar. Biol. Ecol. 189: 1–11.CrossRefGoogle Scholar
  27. Uye, S. & A. Murase, 1997. Relationship of egg production rates of the planktonic copepod Calanus sinicus to phytoplankton availability in the Inland Sea of Japan. Plankton Biol. Ecol. 44: 3–11.Google Scholar
  28. Uye, S. & T. Shimazu, 1997. Geographical and seasonal variations in abundance, biomass and estimated production rates of mesoand macrozooplankton in the Inland Sea of Japan. J. Oceanogr. 53: 529–538.Google Scholar
  29. Watson, S.W., T.J. Novitsky, H.L. Quinby & F.W. Valois, 1977. Determination of bacterial number and biomass in the marine environment. Appl. Environ. Microbiol 33: 940–946.PubMedGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Yasuo Nakamura
    • 1
  1. 1.National Institute for Environmental StudiesTsukuba, IbarakiJapan

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