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Freshwater Crayfish 17(1): 155-158 (2010)

PEER REVIEWED    RESEARCH ARTICLE

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Fungal isolations from Saaremaa, Estonia: Noble crayfish (Astacus astacus) with melanised spots

Makkonen J, Kokko H, Henttonen P, Kivistik M, Hurt M, Paaver T and Jussila J  e-mail link

Published Online: 12/31/2010

Abstract

Noble crayfish (Astacus astacus) stocks on the Estonian Island of Saaremaa are productive and have long been void of major disease outbreaks. Since the early 1990’s, a disease causing cuticle melanisation was observed in some populations. The frequency of infected specimens is high, and can reach 60% of the crayfish in the River Kuke. The disease is assumed to be burn spot disease, but it has not been formally diagnosed. Symptoms are atypical for burn spot disease, at least when compared to symptoms seen in Finland. Microbes were isolated from ten noble crayfish collected from the River Kuke that exhibited disease symptoms. Samples were collected from melanised spots on the abdominal cuticle and walking legs, and a variety of fungi and oomycetes were isolated including; Saprolegnia parasitica, Saprolegnia australis, Mucor hiemalis and Mucor racemosus. A combination of several of these pathogens may cause the atypical symptoms of burn spot disease seen in Estonia, or the isolated Saaremaa crayfish populations may just express disease symptoms differently.

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How to Cite

Makkonen J, Kokko H, Henttonen P, Kivistik M, Hurt M, Paaver T and Jussila J. (2010). Fungal isolations from Saaremaa, Estonia: Noble crayfish (Astacus astacus) with melanised spots. Freshwater Crayfish 17(1):155-158. doi: 10.5869/fc.2010.v17.155

 

 

Author Information

Makkonen J, Kokko H, Henttonen P, Kivistik M, Hurt M, Paaver T and Jussila J

 

Publication History

   Manuscript Submitted: 2/4/2009

   Manuscript Accepted: 9/16/2009

   Published Online: 12/31/2010

   Published in Print: 12/31/2010

 

 

Funding Information

No specific funding statement is available for this article.

 

 



 

 

 

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