Some Basic Methods in Respiratory Physiology Studies Applied in the Siberian Sturgeon

  • Guy Nonnotte
  • Patrick Williot
  • Karine Pichavant-Rafini
  • Michel Rafini
  • Liliane Nonnotte
Chapter

Abstract

Numerous studies have shown that extracellular acid-base status in fish is greatly sensitive to small variations of temperature, PCO2, and bicarbonate system in water. Whereas control of temperature and oxygenation of the environmental water is a usual practice in physiological studies on fish and even though water is directly in contact with the gills, the main site of acid-base and ionic regulations, the environmental acid-base status (pH, alkalinity, PCO2) has rarely been paid much attention.

The purpose of this chapter is to recall and to describe a methodological approach to manage the water acid-base system which must be perfectly controlled to study numerous physiological regulation mechanisms in fishes.

Moreover, a particular attention was dedicated to different methods used to determine the extracellular acid-base balance in fish. At present, the use of automatic clinical blood analyzers allows to obtain either blood PO2, PCO2, and pH simultaneously or the total CO2 in plasma if using a CO2 analyzer. But the use of these devices remains problematic at a temperature lower than 37 °C. The aim of this review is also to recall that the best results are obtained using the Astrup interpolation method (1956) which was applied in the Siberian sturgeon research, respectively, by Salin (La toxicité de l’ammoniaque chez l’esturgeon sibérien, Acipenser baerii: effets morphologiques, physiologiques, métaboliques d’une exposition à des doses sblétales et létales. Thèse No 749, Université Bordeaux I, p 134, 1992), Nonnotte et al. (Respir Physiol 91:71–82, 1993), and Maxime et al. (Respir Physiol 100:203–212, 1995).

Keywords

Methodology Acid-base Water alkalinity pH Bicarbonate Carbon dioxide partial pressure Acipenser baerii 

Abbreviations

aH

Ions H+ activity

αCO2

Carbon dioxide solubility

αO2

Oxygen solubility

ß

Buffer value of the blood = ΔHCO3]/ΔpH

Ca

Concentration of the added strong acid

CO3−−

Carbonate ion

γH

Ions H+ activity coefficient

H2CO3

Carbonic acid

HCO3

Bicarbonate ion

Ki

Equilibrium constant

Na

Acid normality (0.1 N)

PCO2

Carbon dioxide partial pressure in kPa

pH

−log aH or aH = 10−pH

PO2

Oxygen partial pressure in kPa

PwO2

Oxygen partial pressure in water in kPa

pHb

Blood pH

PwCO2

Carbon dioxide partial pressure in water in kPa

t

Temperature in °C

TA

Alkalinity in mEq L−1

Va

Added acid volume in μL

Veq

Acid volume added at the equivalent point

V0

Water sample volume in mL or μL

Notes

Acknowledgments

We wish to gratefully acknowledge the efficient help of Dr. Nonnotte Philippe, Research Engineer Geochemistry/TI-MS at the Geosciences Department of the Brest University (France), IUEM, UMR 6538, and to Christophe Nonnotte (S/A Flight Tests Aircraft Manager BSEMD) Airbus Industry, Toulouse (France), in drawing the figures.

Notes of the Authors

Respiration is the process by which animals take in oxygen necessary for cellular metabolism and release carbon dioxide that accumulates in their body as a result of the expenditure of energy. Techniques used for measuring oxygen consumption were described in Chaps.  18 and  52. This chapter concerns carbon dioxide release and acid-base status for the sturgeon Acipenser baerii only.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Guy Nonnotte
    • 1
  • Patrick Williot
    • 2
  • Karine Pichavant-Rafini
    • 3
  • Michel Rafini
    • 4
  • Liliane Nonnotte
    • 1
  1. 1.La Teste de BuchFrance
  2. 2.AudengeFrance
  3. 3.Laboratoire ORPHY EA4324Université de Bretagne OccidentaleBrest Cedex 3France
  4. 4.Département Communication, Anglais, Sciences HumainesUniversité de Bretagne OccidentaleBrest Cedex 3France

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