Renal Na,K-ATPase and osmoregulation in the crayfish, Procambarus clarkii

摘要: Abstract The freshwater crayfish, Procambarus clarkii , is a strong hyperosmoregulator in fresh water (FW) and 25% sea (25% SW), it weakly hyperosmoregulates 50 75% SW. produces dilute urine FW SW, but the becomes progressively more concentrated 50% SW nearly isosmotic with haemolymph Antennal gland Na,K-ATPase ESA was highest crayfish acclimated decreased significantly animals for two weeks or months It hypothesized: (a) that only portion of antennal powers renal salt reabsorption and, thus, production P. (b) may maintain high “basal” levels to power other, non-osmoregulatory transport functions such as organic acid secretion into sugar amino from it. time course after abrupt transfer consistent enzyme degradation.