Osmoregulatory responses to ddt and varying salinities in Salmo gairdneri—I. Gill Na-K-ATPase

Formothion and propoxur induced alterations in biochemical constituents of catfish, Heteropneustes fossilis

“……”

Formothion and propoxur induced alterations in biochemical constituents of catfish, Heteropneustes fossilis

“……”

Inhibition of Gill Na+,K+-ATPase Activity in the Eel,Anguilla anguilla,by Fenitrothion

“…For example, DDT decreased the activity of Na + ,K + -and residual ATPase in gills of Salmo gairdneri (Leadem et al, 1974). Exposure to endosulfan for 30 days decreased ATPase activity of Channa gachua gills (Dalela et al, 1978), whereas low concentrations of the pesticides aldrin and dieldrin stimulated Na + ,K + -ATPase activity of Labeo rohita gill homogenates (Verma et al, 1988).…”

Altered Permeability of Cell Membranes

“…Also, a dose‐response curve was obtained for eel intestinal homogenates in which 10 ppm DDT still inhibited 50% of the activity of the enzyme. Recently, another laboratory (23, 103) has demonstrated a similar correlation between disrupted plasma osmoregulation and partially inhibited gill Na + ‐K + ATPase in trout adapted to seawater (33% and 100%) and fed near‐lethal levels of DDT. These eel and trout data are conclusive enough to suggest that the extreme sensitivity of fish to organochlorine pollutants (80, 90, 126) derives, in part, from toxic effects on active sodium transport in those organs affecting plasma osmoregulation.…”

Formothion and propoxur induced alterations in biochemical constituents of catfish, Heteropneustes fossilis

“……”

Inhibition of Gill Na+,K+-ATPase Activity in the Eel,Anguilla anguilla,by Fenitrothion

“…For example, DDT decreased the activity of Na + ,K + -and residual ATPase in gills of Salmo gairdneri (Leadem et al, 1974). Exposure to endosulfan for 30 days decreased ATPase activity of Channa gachua gills (Dalela et al, 1978), whereas low concentrations of the pesticides aldrin and dieldrin stimulated Na + ,K + -ATPase activity of Labeo rohita gill homogenates (Verma et al, 1988).…”

Altered Permeability of Cell Membranes

“…Also, a dose‐response curve was obtained for eel intestinal homogenates in which 10 ppm DDT still inhibited 50% of the activity of the enzyme. Recently, another laboratory (23, 103) has demonstrated a similar correlation between disrupted plasma osmoregulation and partially inhibited gill Na + ‐K + ATPase in trout adapted to seawater (33% and 100%) and fed near‐lethal levels of DDT. These eel and trout data are conclusive enough to suggest that the extreme sensitivity of fish to organochlorine pollutants (80, 90, 126) derives, in part, from toxic effects on active sodium transport in those organs affecting plasma osmoregulation.…”

Formothion and propoxur induced alterations in biochemical constituents of catfish, Heteropneustes fossilis

“……”

Inhibition of Gill Na+,K+-ATPase Activity in the Eel,Anguilla anguilla,by Fenitrothion

“…For example, DDT decreased the activity of Na + ,K + -and residual ATPase in gills of Salmo gairdneri (Leadem et al, 1974). Exposure to endosulfan for 30 days decreased ATPase activity of Channa gachua gills (Dalela et al, 1978), whereas low concentrations of the pesticides aldrin and dieldrin stimulated Na + ,K + -ATPase activity of Labeo rohita gill homogenates (Verma et al, 1988).…”

Altered Permeability of Cell Membranes

“…Also, a dose‐response curve was obtained for eel intestinal homogenates in which 10 ppm DDT still inhibited 50% of the activity of the enzyme. Recently, another laboratory (23, 103) has demonstrated a similar correlation between disrupted plasma osmoregulation and partially inhibited gill Na + ‐K + ATPase in trout adapted to seawater (33% and 100%) and fed near‐lethal levels of DDT. These eel and trout data are conclusive enough to suggest that the extreme sensitivity of fish to organochlorine pollutants (80, 90, 126) derives, in part, from toxic effects on active sodium transport in those organs affecting plasma osmoregulation.…”