Respiratory Effects of Environmental Acidification in Perch (Perca fluviatilis) and Rainbow Trout (Salmo gairdneri)

摘要: Summary The respiratory effects of low pH were studied in the field and laboratory. thickness gill epithelium was similar perch from an acid lake to that a neutral lake. This observation suggests hypertrophy not primary cause death fish A 24-h exposure 5 did affect blood properties ion concentrations rainbow trout at all. However, when acid-exposed further subjected hypoxia, red cell water content chloride concentration increased, ATP decreased, plasma so­ dium decreased. These changes seen animals maintained hypoxia. loss ions may be caused by hypoxia-induced increase diffusion area gills, hyperventilation, which initially increases gradient across epithelium.