Las presas amenazan a los salmónidos al desencadenar la enfermedad renal proliferativa dependiente de la temperatura

Área de la Ciencia:

• Ecology; Environmental Science; Aquatic Health

Sus antecedentes:

• Dams alter river ecosystems by changing flow and temperature.; Brown trout (Salmo trutta) are popular game fish affected by environmental changes.; Proliferative kidney disease (PKD) is an emerging salmonid disorder.

Objetivo del estudio:

• To investigate the impact of small river impoundments on brown trout health.; To identify novel threats posed by reservoirs to aquatic ecosystems.; To assess the role of dams in parasite spread and disease prevalence.

Principales métodos:

• Monitoring downstream water temperatures in areas with small river impoundments.; Assessing the prevalence and abundance of the parasite Tetracapsuloides bryosalmonae.; Evaluating the impact of elevated temperatures on brown trout and PKD outbreaks.

Principales resultados:

• Small impoundments elevate downstream summer water temperatures.; Increased temperatures correlate with higher prevalence and abundance of T. bryosalmonae.; Reservoirs act as hotspots for this parasite, increasing PKD risk in brown trout.

Conclusiones:

• Dams, specifically reservoirs, can exacerbate parasite-driven diseases in fish like brown trout.; Disease risks should be integrated into dam assessment and management decisions.; Downstream areas of reservoirs serve as crucial monitoring sites for climate change impacts on rivers.