Abstract
Rainbow trout were exposed to 0–80 μg l−1 aluminum (Al) at pH 5.2 in synthetic soft water, for up to 8 weeks. Trout were submitted to an incremental swimming test to quantify their aerobic swimming capacity (Ucrit). After a simple, non-invasive cardiac surgery to install Doppler flow probes, their heart rate, cardiac output and stroke volume were measured while swimming at increasing water velocities. Fish exposed to Al accumulated significant amounts of Al at the gills (0–80 μg g−1) and in their liver (5–60 μg g−1) and had decreases in swimming capacity, ranging from 11 to 21%. Analysis of cardiac parameters during swimming revealed that increases in heart rate were used in trout exposed to the highest concentrations of Al to increase cardiac output, whereas control fish tended to increase cardiac output through increases in stroke volume.
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Dussault, È., Playle, R., Dixon, D. et al. Effects of Chronic Aluminum Exposure on Swimming and Cardiac Performance in Rainbow Trout, Oncorhynchus mykiss. Fish Physiol Biochem 30, 137–148 (2004). https://doi.org/10.1007/s10695-005-4317-8
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DOI: https://doi.org/10.1007/s10695-005-4317-8