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[A toxicological evaluation of micromycetes isolated from salmon roe]
Abstract:
Three species of micromycetes (Aspergillus clavatus Desm., Cladosporium herbarum (Pers) Lk., Penicillium canescens Sopp.) isolated from the cultivated salmon spawn have been studied for their toxigenic properties and pathogenicity for warm-blooded animals. LD50 are determined for mice perorally administered mycelium suspension of the first two species; the third of the studied species proved to be nontoxicogenic. The possible pathogenic action of mycotoxins on fish spawn in aquarium is discussed.
Insights
Three micromycetes from salmon spawn were tested for toxicity. Aspergillus clavatus and Cladosporium herbarum showed toxicity in mice, while Penicillium canescens was non-toxic. Mycotoxin effects on fish spawn were also considered.
Area of Science:
- Mycology
- Toxicology
- Aquaculture Pathology
Background:
- Micromycetes are fungi that can contaminate aquaculture environments.
- Cultivated salmon spawn can be exposed to various fungal species.
- Understanding fungal pathogenicity is crucial for fish health and aquaculture sustainability.
Purpose of the Study:
- To investigate the toxigenic potential and pathogenicity of three micromycetes species isolated from salmon spawn.
- To determine the median lethal dose (LD50) of toxic micromycetes for warm-blooded animals.
- To assess the potential impact of mycotoxins on fish spawn in aquarium settings.
Main Methods:
- Isolation and identification of micromycetes species from cultivated salmon spawn.
- Determination of LD50 values in mice through peroral administration of mycelium suspensions.
- Evaluation of the toxicogenic properties of Aspergillus clavatus, Cladosporium herbarum, and Penicillium canescens.
Main Results:
- Aspergillus clavatus and Cladosporium herbarum demonstrated toxicogenic properties and pathogenicity in mice.
- Penicillium canescens was found to be non-toxicogenic.
- LD50 values were established for the toxic species, indicating their potential hazard.
Conclusions:
- Two of the three studied micromycetes species pose a toxicological risk to warm-blooded animals.
- The findings highlight the importance of monitoring fungal contamination in aquaculture.
- Further research is needed to fully understand the implications of mycotoxins for fish spawn health.