Intracellular Acid-Base Regulation during Recovery from Locomotor Activity in the Blue Crab (Callinectes sapidus)

Thirty minutes of strenuous muscular exercise in the blue crab resulted in apronounced drop in pH (ΔpH = -0.2 to -0.47 units) and rise in lactate concentration (Δlactate = +4 to +44 mmol·L⁻¹) in hemolymph, light and dark levator, cheliped, and heart muscles. Muscle pHi was restored to control levels...

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Bibliographic Details
Published in:Physiological zoology 1989-05, Vol.62 (3), p.621-638
Main Authors: Milligan, C. Louise, Walsh, Patrick J., Booth, Charles E., McDonald, D. Gordon
Format: Article
Language:English
Subjects:
Ammonia
Biochemistry. Physiology. Immunology
Biological and medical sciences
Crabs
Crustacea
Excretion
Fundamental and applied biological sciences. Psychology
Hemolymph
Invertebrates
Lactates
Locomotion
Metabolism
Muscles
Myocardium
Physiology. Development
Swimming
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Summary:Thirty minutes of strenuous muscular exercise in the blue crab resulted in apronounced drop in pH (ΔpH = -0.2 to -0.47 units) and rise in lactate concentration (Δlactate = +4 to +44 mmol·L⁻¹) in hemolymph, light and dark levator, cheliped, and heart muscles. Muscle pHi was restored to control levels within 1 h, whereas restoration of hemolymph pH was not complete until 4 h postexercise. The lactate load in both hemolymph and levator muscles persisted for 4-8 h. Net H⁺ efflux to the environment was elevated sevenfold after exercise and is thought to be responsible for the rapid correction of muscle pHi. The pattern of lactate and H⁺ dynamics in the levator muscles suggests that the bulk of the lactate load was metabolized in situ.
ISSN:0031-935X
1937-4267
DOI:10.1086/physzool.62.3.30157917