alexa Histopathological changes in cultured lake trout, Salvelinusnameycush, subjected to cumulative loading in a water reuse system
Toxicology

Toxicology

Toxicology: Open Access

Author(s): James W Meade, Roger Lee Herman

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Lake trout (Salvelinus namaycush), 16 cm long, were reared 8 wk in five serial reuse units, resulting in cumulative loadings of 1.5–7.5 kg fish∙L−1∙min−1. Although mean un-ionized ammonia concentrations in the highest loading levels were less than 10% of those often considered as safe for culture of rainbow trout (Salmo gairdneri), lake trout reared at the higher loading levels showed dilation of glomerular capillaries, a condition that persisted after cumulative loading conditions were removed, and gill epithelial hyperplasia and hypertrophy. We observed lamellar telangiectasis caused by sampling technique. We conclude that parameters other than ammonia concentrations are significant factors in branchial irritation. 

This article was published in Canadian Journal of Fisheries and Aquatic Sciences and referenced in Toxicology: Open Access

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