... emersion. Tidal crabs exhibited an endogenous rhythm of oxygen consumption during continuous submersion with lower oxygen consumption during periods of anticipated emersion, which was not detected in non-tidal crabs. During emersion, tidal crabs were able to buffer apparent changes in acid–base balance...

...Daniel P. Small; Piero Calosi; Samuel P. S. Rastrick; Lucy M. Turner; Stephen Widdicombe; John I. Spicer ABSTRACT Regulation of extracellular acid–base balance, while maintaining energy metabolism, is recognised as an important aspect when defining an organism's sensitivity to environmental changes...

... in vivo in ion-transporting cells of zebrafish larvae reveal the roles of ion-transport-related proteins in intracellular acid–base regulation. Ionic regulation Acid–base balance Sodium–hydrogen exchanger (NHE) Carbonic anhydrase Danio rerio Morpholino knockdown Ammonium chloride...

... post-feeding, demonstrate that apical Cl - /HCO - 3 exchange plays a vital role in postprandial Cl - and water absorption. Postprandial acid-base balance disturbance as indicated by plasma alkalinization was limited or absent,indicating compensation for gastric acid secretion in this teleost fish...

... to hypercarbia (∼0.8%CO 2 ) for 10 h prior to acetazolamide injection, an exposure that significantly increased branchial net acid excretion. The results of the present study support the widely held premise that branchial intracellular CA activity (tCAc) plays a key role in regulating acid-base balance...

... ; Tufts and Perry, 1998 ). Other general findings are discussed below. These include the tendency for P CO 2 to rise with increasing temperature and,in many tetrapod species, for whole-body CO 2 content to fall. In thinking generally about the effects of temperature on acid—base balance...

... oxygen equilibrium curve: a comparison between environmental hypoxia and anemia. Am. Zool. 37 , 101 -108. Busk, M., Jensen, F. B. and Wang, T. ( 2000a ). The effects of feeding on metabolism, gas transport and acid—base balance in the bullfrog Rana catesbeiana . Am. J. Physiol. 200 , R185...

... is probably approximately 6.2. References Bhattacharya, S. and Lecomte, J. T. J. ( 1997 ). Temperature dependence of histidine ionization constants in myoglobin. Biophys. J . 73 , 3241 –3256. Bickler, P. E. ( 1981 ). Effects of temperature on acid–base balance and ventilation in desert iguanas...

... velocity cm) is reached, followed by burst words: fish, exercise, acid-base balance, ionoregulation, metabolism, lactate, catechol- mines, ventilation. 286 C. M. W O O D swimming at higher velocity to ensure exhaustion (Butler et al. 1986; Primmel! et al. 1986; Mommsen and Hochachka, 1988). More commonly...

... for calcification. Introduction The predominant cuticular mineral in crustaceans is CaCO3. Studies of ionoregulation during the crustacean moulting cycle have focused on calcium Key words: crayfish, moulting, calcium, acid-base balance. 470 M. G. WHEATLY AND L. A. IGNASZEWSKI (reviewed by Greenaway, 1985) and only...

... of an electrogenic proton pump located in the apical membrane. J. exp. Biol. 150, 159-169 (1990) 159 Printed in Great Britain © The Company of Biologists Limited 1990 THE ACID-BASE BALANCE OF THE OUTER MANTLE EPITHELIUM OF ANODONTA CYGNEA BY J. MACHADO Institute de Ciencias Biomedicas Abel Salazar, Oporto, Portugal...

... changes in PI O 2 for a given state of activity -- should be valid in many crustaceans and teleosts. fish Silurus respiration regulation oxygen consumption acid-base balance bountercurrent © 1989 by Company of Biologists 1989 5 1 1989 | / . exp. Biol. 143, 305-319 (1989) 305...

.... Possible mechanisms of renal postfiltrational electrolyte and acidic equivalent processing are discussed. 20 10 1988 © 1989 by Company of Biologists 1989 antennal gland acid-base balance ion regulation crayfish J. exp. Biol. 143, 53-70 (1989) 5 3 Printed in Great Britain ©...