Regulation of blood haemoglobin and electrolytes in rainbow trout Salmo gairdneri (Richardson) exposed to nitrite

E.M. Williams, F.B. Eddy

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

    Crynodeb

    Rainbow trout (30-70 g) were exposed to environmental nitrite for periods varying from 2 to 24 h, and after 12 h blood plasma nitrite concentration was eight times the environmental levels (0.5 mmol l-1). The rise was followed by an increase in methaemoglobin levels from around 3% to over 60%. After 2 h nitrite exposure the concentrations of plasma potassium, sodium and chloride fell, followed 2 h later by an increase in intra-erythrocyte potassium and sodium concentration with increased red cell volume. Twelve h nitrite exposure led to an increase in the red cell population, the new cells being smaller and containing less haemoglobin. After 24 h exposure, fish fell into two groups: nitrite-intolerant fish with high levels of plasma nitrite and methaemoglobin and nitrite-tolerant fish with low plasma levels. All fish surviving 24 h nitrite exposure had lower plasma potassium levels than unexposed fish.
    Iaith wreiddiolSaesneg
    Tudalennau (o-i)13-28
    Nifer y tudalennau16
    CyfnodolynAquatic Toxicology
    Cyfrol13
    Rhif cyhoeddi1
    Dynodwyr Gwrthrych Digidol (DOIs)
    StatwsCyhoeddwyd - 24 Tach 1988

    Ôl bys

    Gweld gwybodaeth am bynciau ymchwil 'Regulation of blood haemoglobin and electrolytes in rainbow trout Salmo gairdneri (Richardson) exposed to nitrite'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.

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