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The invasive red swamp crayfish increases infection of the amphibian chytrid fungus

Emerging infectious diseases are increasingly recognized as a severe threat to wildlife. Chytridiomycosis, caused by Batrachochytrium dendrobatidis (Bd), is considered one of the most important causes for the decline of amphibian populations worldwide. Identifying potential biological reservoirs and characterizing the role they can play in pathogen maintenance is not only important from a scientific point of view, but also relevant from an applied perspective (e.g. disease control strategies), especially when worldwide distributed invasive species are involved. This study aimed (1) to analyse the prevalence and infection intensity of Bd in the invasive red swamp crayfish (Procambarus clarkii) across the western Andalusian region in Spain; and (2) to assess whether the presence of crayfish affects the prevalence and infection intensity of Bd in amphibians of Doñana Natural Space (DNS), a localized highly protected area within the Andalusian region. First, infection prevalence in crayfish guts was 1.5% regionally (four out of 267 crayfish were qPCR positive to Bd, all of them belonging to the same Andalusian population); qPCR positives were histologically confirmed by finding zoosporangia of Bd in gastrointestinal walls of the red swamp crayfish. Second, a higher prevalence of Bd infection was found in DNS (19% for crayfish and 28% for amphibians on average), a place with great diversity and abundance of amphibians. Analyses showed that prevalence of Bd in amphibians was related to the presence of the red swamp crayfish, indicating that this crayfish could be a suitable predictor of Bd infection in co-occurring amphibians. These results suggest that the red swamp crayfish might be a possible reservoir for Bd, representing an additional indirect impact on amphibians, a role that had not been previously recognised in its invasive range. informacion[at]ebd.csic.es: Oficialdegui et al (2019) The invasive red swamp crayfish (Procambarus clarkii) increases infection of the amphibian chytrid fungus (Batrachochytrium dendrobatidis). Biol Invasions DOI: 10.1007/s10530-019-02041-6


https://link.springer.com/article/10.1007/s10530-019-02041-6
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Content with tag amphibians .

The invasive red swamp crayfish increases infection of the amphibian chytrid fungus

Chytridiomycosis, caused by Batrachochytrium dendrobatidis (Bd), is considered one of the most important causes for the decline of amphibian populations worldwide. Identifying potential biological...

Iberian amphibians occupy higher mountain areas compared to the last century

extinctions. Amphibians are one of the most sensitive animal groups to climate change, currently undergoing a global decline. Predictive models for Europe and Iberian Peninsula forecast that the...

Eucalypt plantations disturb the development of amphibian larvae

Consequences of human actions like global warming, spread of exotic species or resource consumption are pushing species to extinction. Even species considered to be at low extinction risk often...

Macroevolutionary shift in the size of amphibian genomes and the role of life history and climate

Genome size varies enormously from one species to another, and amphibians are the group of vertebrates where genome size varies the most. Amphibians are also really old lineages that have been...
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