Skip to main content
Download PDF
  • Published:

Diseases and Injuries Associated with Mortality of Hatchery Reared Baltic Cod (Gadus morhua L.) Larvae

Acta Veterinaria Scandinavica volume 34, pages 385–390 (1993)Cite this article

Abstract

A cod hatching plant was established in 1992 on the island of Bornholm in the Baltic Sea in order to elucidate the possibilites for restocking of cod fry in this brackishwater system. The disease prevalence in 3 batches of hatchery-reared yolksac larvae from the Baltic cod (Gadus morhua L.) was monitored during the posthatch period. High prevalences of bacteriosis/mycosis, lordosis/scoliosis, injuries and protozoan endoparasitism were recorded. Vibrio sp. and Vibrio anguillarum serovar 04, 06, 08 in addition to nontypable strains and saprolegniaceous fungi were isolated from the larvae. The dinoflagellate-like endoparasites were located in the yolksac of the cod larvae.

References

  • Bergh Ø, Hansen GH, Helvik JV: Experimental infection of eggs and yolk sac larvae of halibut, Hippoglossus hippoglossus L. J. Fish Dis. 1992, 15, (379–391).

    Article  Google Scholar 

  • Buchmann Κ: On the infection of Baltic cod (Gadus morhua L.) by the acanthocephalan Echinorhyn–chus gadi (Zoega) Müller. Nord. Vet.-Med. 1986, 38, (308–314).

    CAS  PubMed  Google Scholar 

  • Dalsgaard I, Mellergaard S, Larsen JL: Mycobacteri–osis in cod (Gadus morhua L.) in Danish coastal waters. Aquaculture 1992, 107, (211–219).

    Article  Google Scholar 

  • Fagerholm HP: Parasites of fish in Finland. VI Nematodes. Acta Academic Aboensis (Ser. B). 1982, 40, (5–128).

    Google Scholar 

  • Hedegaard Pedersen B, Buchmann Κ, Køie Îœ: Baltic larval cod (Gadus morhua L.) are infested with a protozoan endoparasite in the yolk sac. Dis. aquat. Org. 1993, 16, (29–33).

    Article  Google Scholar 

  • Hollande A, Cachon J: Un parasite des aeufs de Sardine: l’Ichthyodinium chabelardi, nov. gen., nov. sp. (A parasite in Sardine eggs: Ichtyodinium chaberlardi nov. gen., nov sp.) CR. Acad. Sei., Paris (Sér. D) 1952, 235, (976–977).

    Google Scholar 

  • Kocan RM, Westernhagen Hv Landolt ML, Fursten-berg G: Toxicity of seasurface microlayer: Effects of Hexane extract on Baltic herring (Clupea harengus) and Atlantic cod (Gadus morhua) embryos. Mar. Env. Res. 1987, 23, (291–305).

    Article  CAS  Google Scholar 

  • Køie M: Digenetic trematodes from Gadus morhua L. (Osteichthyes, Gadidae) from Danish and adjacent waters with special reference to their life–histories. Ophelia 1984, 23, (195–222).

    Article  Google Scholar 

  • Larsen JL: Vibrio anguillarum: A comparative study of fish pathogenic, environmental, and reference strains. Acta vet. scand. 1983, 24, (456–476).

    Article  CAS  Google Scholar 

  • Larsen JL, Jensen NJ: The ulcus syndrome in cod (Gadus morhua) V. Prevalence in selected Danish marine recipients and a control site in the period 1976-1979. Nord. Vet.-Med. 1982, 34, (303–312).

    CAS  PubMed  Google Scholar 

  • Möller Η, Anders Κ: Diseases and Parasites of Marine Fishes. Kiel, Verlag Möller 1986, 365 pp.

    Google Scholar 

  • Nissling A, Westin L: Egg buoyancy of Baltic cod (Gadus morhua) and its implications for cod stock fluctuations in the Baltic. Marine Biology 1991, 111, (33–35).

    Article  Google Scholar 

  • Shafer TH, Padgett DE, Celio DA: Evidence for enhanced salinity tolerance of a suspected fungal pathogen of Atlantic menhaden, Brevoortia ty–rannus Latrobe. J. Fish Dis. 1990, 13, (335–344).

    Article  Google Scholar 

  • Sørensen UBS, Larsen JL: Serotyping of Vibrio anguillarum. Appl. environ. Microbiol. 1986, 51, (593–597).

    Article  Google Scholar 

  • Thulin J, Höglund J, Lindesjöö Ε: Fish Diseases in coastal waters of Sweden. Stockholm, Almänna Förlaget 1989, 126 pp.

    Google Scholar 

  • Wieland Κ: Distribution and mortality of cod eggs in the Bornholm Basin (Baltic sea) in May and June 1986. Kieler Meeresforsch., Sonderh. 1988, 6, (331–340).

    Google Scholar 

Download references

Acknowledgement

This work was supported by the Danish Ministry of Fisheries.

Author information

Authors and Affiliations

  1. Department of Veterinary Microbiology, Section of Fish Diseases, Royal Veterinary and Agricultural University and Fish Disease Laboratory, Danish Institute of Fisheries and Marine Research, c/o Royal Veterinary and Agricultural University, Bülowsvej 13, DK-1870, Frederiksberg, Denmark

    K. Buchmann, J. L. Larsen & I. Dalsgaard

Authors
  1. K. Buchmann
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J. L. Larsen
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. I. Dalsgaard
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Buchmann, K., Larsen, J.L. & Dalsgaard, I. Diseases and Injuries Associated with Mortality of Hatchery Reared Baltic Cod (Gadus morhua L.) Larvae. Acta Vet Scand 34, 385–390 (1993). https://doi.org/10.1186/BF03548182

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1186/BF03548182

Keywords

Acta Veterinaria Scandinavica

ISSN: 1751-0147