2017
DOI: 10.1007/s00360-017-1065-x
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Abstract: White sturgeon (Acipenser transmontanus) completely protect intracellular tissue pH (pH) despite large reductions in extracellular (blood) pH (pH), termed preferential pH regulation, in response to elevated environmental PCO (hypercarbia) and in general appear to be relatively resilient to stressors. Preferential pH regulation is thought to be associated with hypercarbia tolerance in general, but has also recently been observed to protect pH against metabolic acidoses induced by exhaustive exercise and anoxia … Show more

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Cited by 15 publications
(23 citation statements)
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“…White Sturgeon are capable of preferentially regulating intracellular pH in some vital tissues during challenging conditions. However, when these fish were exposed separately to exhaustive exercise or 45 min of air exposure, extracellular pH significantly decreased (0.30 and 0.35 units, respectively), which in turn reduced intracellular red blood cell pH (Shartau et al 2017). This drastic degree of change did not occur in our study: Lake Sturgeon extracellular pH decreased by approximately 0.21 and 0.17 units from time 0 to 20 min in the novice angler and summer treatments, respectively.…”
Section: Discussionmentioning
confidence: 99%
“…White Sturgeon are capable of preferentially regulating intracellular pH in some vital tissues during challenging conditions. However, when these fish were exposed separately to exhaustive exercise or 45 min of air exposure, extracellular pH significantly decreased (0.30 and 0.35 units, respectively), which in turn reduced intracellular red blood cell pH (Shartau et al 2017). This drastic degree of change did not occur in our study: Lake Sturgeon extracellular pH decreased by approximately 0.21 and 0.17 units from time 0 to 20 min in the novice angler and summer treatments, respectively.…”
Section: Discussionmentioning
confidence: 99%
“…[ 49 ] Apical NHE appears in most species, while apical VHA is found only in limited species. Selected species are hagfish ( Myxine glutinosa ), [ 50 ] lamprey ( Lethenteron reissneri ), shark ( Mustelus antarcticus ), [ 51 ] sturgeon ( Acipenser transmontanus ), [ 52 ] eel ( Anguilla anguilla ), [ 53 ] catfish ( Pangasianodon hypophthalmus ), [ 54 ] loach ( Misgurnus anguillicaudatus ), [ 16 ] Osorezan dace ( Tribolodon hakonensis ), [ 41 ] goldfish ( Carassius auratus ), [ 55 ] carp ( Cyprinus carpio ), [ 35 ] Lake Candidus (LC) dace ( Candidia barbata ), rainbow trout ( Oncorhynchus mykiss ), [ 27–29 ] tilapia ( Oreochromis mossambicus ), [ 56 ] medaka ( Oryzias latipes ), [ 26 ] , killifish ( Fundulus heteroclitus ), [ 57 ] mudskipper ( Periophthalmodon schlosseri ), [ 30 ] and pufferfish. ( Takifugu rubripes ).…”
Section: Loss Of the Vha Trait During Fish Evolutionmentioning
confidence: 99%
“…Furthermore, the rate and degree of pH e compensation during acute hypercarbia exposure is also affected by water salinity (Tovey and Brauner, 2018), ion composition and pH (Sackville et al, 2018). However, survival during severe acute hypercarbia may depend on protecting pH i (Shartau et al, 2017a;Vandenberg et al, 1994;Wood et al, 1983;Yoshikawa et al, 1994) more so than pH e . Mortality in marine fishes during severe acute hypercarbia may be due to reduced heart pH i (Hayashi et al, 2004).…”
Section: Acid-base Regulation During Hypercarbiamentioning
confidence: 99%
“…Protection of cardiac pH i may guard against reduced cardiac performance, as an in situ perfused heart preparation demonstrated cardiac output, power output and stroke volume did not change during acute hypercarbia (5 kPa P CO2 ) in the preferentially pH i -regulating armored catfish (Hanson et al, 2009) and white sturgeon (Baker et al, 2011). The ability to protect pH i in various tissues may allow those species to be resilient to a variety of respiratory and metabolic acidoses (Harter et al, 2014;Shartau et al, 2017a) and provide them with a window for pH e to recover following the development of an acidosis as time and/or conditions permit. Nevertheless, preferential pH i regulation may not be sufficient in itself to confer tolerance to severe acute hypercarbia.…”
Section: Acid-base Regulation During Hypercarbiamentioning
confidence: 99%
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