Control of air-breathing in fishes: Central and peripheral receptors

Acta histochemica
Luiz Henrique FlorindoF T Rantin

Abstract

This review considers the environmental and systemic factors that can stimulate air-breathing responses in fishes with bimodal respiration, and how these may be controlled by peripheral and central chemoreceptors. The systemic factors that stimulate air-breathing in fishes are usually related to conditions that increase the O2 demand of these animals (e.g. physical exercise, digestion and increased temperature), while the environmental factors are usually related to conditions that impair their capacity to meet this demand (e.g. aquatic/aerial hypoxia, aquatic/aerial hypercarbia, reduced aquatic hidrogenionic potential and environmental pollution). It is now well-established that peripheral chemoreceptors, innervated by cranial nerves, drive increased air-breathing in response to environmental hypoxia and/or hypercarbia. These receptors are, in general, sensitive to O2 and/or CO2/H+ levels in the blood and/or the environment. Increased air-breathing in response to elevated O2 demand may also be driven by the peripheral chemoreceptors that monitor O2 levels in the blood. Very little is known about central chemoreception in air-breathing fishes, the data suggest that central chemosensitivity to CO2/H+ is more prominent in sarcopt...Continue Reading

Citations

Feb 28, 2019·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Mikkel T ThomsenMark Bayley
Oct 21, 2019·Acta Physiologica·Christian DamsgaardPatricia A Wright
Jul 6, 2019·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Vinicius Araújo ArmelinTobias Wang
Oct 3, 2020·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Igor Noll GuagnoniLuiz Henrique Florindo
Jan 15, 2021·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Junho Eom, Chris M Wood
Feb 6, 2021·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Vinicius Araújo ArmelinLuiz Henrique Florindo
Aug 14, 2019·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Warren W BurggrenJosé Fernando Méndez-Sánchez

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