Seasonal and thermal effects on the concentration of the haemolymph in the New Zealand freshwater crayfish Paranephrops zealandicus white

Seasonal and temperature effects on osmoregulation by the invasive prawnPalaemon elegansRathke, 1837 in the Baltic Sea

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Seasonal and temperature effects on osmoregulation by the invasive prawnPalaemon elegansRathke, 1837 in the Baltic Sea

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Effect of temperature change on synaptic transmission at crayfish neuromuscular junctions

“…Legarra et al, (1984) found that potassium concentrations decreased with lower temperatures in P. clarkii crayfish. Wong and Freeman (1975) also showed that the potassium concentration in the haemolymph is decreased with lower temperatures. Combining the effect of lowered extracellular potassium concentrations with decreased Na + /K + pump function at lower temperatures, it is feasible that the resting membrane potential was depolarised with chronic cold exposure in our study.…”

9. Blood osmoregulation and temperature in crustaceans

“…Wong and Freeman (1976b), working with Paranephrops zealandicus, found results similar in magnitude and direction for naturally occurring, seasonal variations in blood concentrations (winter concentrations higher than summer concentrations), and for those induced experimentally (transfer experiments in summer: rising concentration at low temperature and decreasing concentration at higher temperature).…”

“…Depression of ion loss at higher temperature has been found for chloride in Potamobius fluviatilis (Wikgren 1953) and for sodium in Potamon niloticus (Shaw 1959), both crayfishes from freshwater. Generally, low temperature reduces the active uptake to such an extent that a net loss of salts results (Wong & Freeman 1976b). Spaargaren (1971) mentioned that the gross extra-renal efflux of electrolytes, which as a rule is considerably greater than renal loss, increases in Crangon crangon with the concentration of electrolytes in the blood.…”

Seasonal and temperature effects on osmoregulation by the invasive prawnPalaemon elegansRathke, 1837 in the Baltic Sea

“……”

Effect of temperature change on synaptic transmission at crayfish neuromuscular junctions

“…Legarra et al, (1984) found that potassium concentrations decreased with lower temperatures in P. clarkii crayfish. Wong and Freeman (1975) also showed that the potassium concentration in the haemolymph is decreased with lower temperatures. Combining the effect of lowered extracellular potassium concentrations with decreased Na + /K + pump function at lower temperatures, it is feasible that the resting membrane potential was depolarised with chronic cold exposure in our study.…”

9. Blood osmoregulation and temperature in crustaceans

“…Wong and Freeman (1976b), working with Paranephrops zealandicus, found results similar in magnitude and direction for naturally occurring, seasonal variations in blood concentrations (winter concentrations higher than summer concentrations), and for those induced experimentally (transfer experiments in summer: rising concentration at low temperature and decreasing concentration at higher temperature).…”

“…Depression of ion loss at higher temperature has been found for chloride in Potamobius fluviatilis (Wikgren 1953) and for sodium in Potamon niloticus (Shaw 1959), both crayfishes from freshwater. Generally, low temperature reduces the active uptake to such an extent that a net loss of salts results (Wong & Freeman 1976b). Spaargaren (1971) mentioned that the gross extra-renal efflux of electrolytes, which as a rule is considerably greater than renal loss, increases in Crangon crangon with the concentration of electrolytes in the blood.…”

Seasonal and temperature effects on osmoregulation by the invasive prawnPalaemon elegansRathke, 1837 in the Baltic Sea

“……”

Effect of temperature change on synaptic transmission at crayfish neuromuscular junctions

“…Legarra et al, (1984) found that potassium concentrations decreased with lower temperatures in P. clarkii crayfish. Wong and Freeman (1975) also showed that the potassium concentration in the haemolymph is decreased with lower temperatures. Combining the effect of lowered extracellular potassium concentrations with decreased Na + /K + pump function at lower temperatures, it is feasible that the resting membrane potential was depolarised with chronic cold exposure in our study.…”

9. Blood osmoregulation and temperature in crustaceans

“…Wong and Freeman (1976b), working with Paranephrops zealandicus, found results similar in magnitude and direction for naturally occurring, seasonal variations in blood concentrations (winter concentrations higher than summer concentrations), and for those induced experimentally (transfer experiments in summer: rising concentration at low temperature and decreasing concentration at higher temperature).…”

“…Depression of ion loss at higher temperature has been found for chloride in Potamobius fluviatilis (Wikgren 1953) and for sodium in Potamon niloticus (Shaw 1959), both crayfishes from freshwater. Generally, low temperature reduces the active uptake to such an extent that a net loss of salts results (Wong & Freeman 1976b). Spaargaren (1971) mentioned that the gross extra-renal efflux of electrolytes, which as a rule is considerably greater than renal loss, increases in Crangon crangon with the concentration of electrolytes in the blood.…”