PMID: 9678Jul 1, 1976

Aquatic life at high altitude: respiratory adaptations in the Lake Titicaca frog, Telmatobius culeus

Respiration Physiology
V H HutchisonG Engbretson

Abstract

Telmatobius culeus has a combination of behavioral, morphological and physiological adaptations which allows an aquatic life in cool (10 degrees C) O2-saturated (at 100 mm Hg) waters at high altitude (3812 m). The skin surgace area is increased by pronounced folds and the cutaneous capillaries penetrate to the outer layers of the skin. The erythrocyte volume (394 mu3) is the smallest reported for amphibians. The P50 (15.6 at ph 7.65 and 10 degrees C) is the lowest, and the erythrocyte count (729 - 103/mm3) the highest for an anuran. The O2 capacity (11.7 vol%), hemoglobin (8.1 g/100 ml), hemoglobin concentration (0.281 pg/mu3) and hematocrit (27.9%) measured at 18 degrees C and 3800 m are all elevated in comparison with most amphibians. The O2 dissociation curve is sigmoid (n = 2), the Bohr factor is small (deltalog P50/deltapH = -0.30) and the buffering capacity (-8.9 m M HCO3 - 1-1) is typical for an aquatic amphibian. The metabolic rate (14.1 mul -g-1-h-u) is the lowest reported for a frog and among amphibians only the giant salamanders (Amphiuma, Necturus and Siren) have lower values. If prevent from surfacing in hypoxic waters, the frogs ventilate the skin by "bobbing" behavior; if allowed to surface, they will ventilate t...Continue Reading

References

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Citations

Nov 1, 1978·Respiration Physiology·G Nonnotte, R Kirsch
Sep 1, 1979·Respiration Physiology·V H Hutchison, K Miller
Jan 1, 1983·Comparative Biochemistry and Physiology. A, Comparative Physiology·R C Sinha
Jan 1, 1989·Comparative Biochemistry and Physiology. A, Comparative Physiology·G RuizA Veloso
Feb 22, 2000·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·P C Hou, S P Huang
Feb 1, 1985·Biological Reviews of the Cambridge Philosophical Society·M E Feder, W W Burggren
Dec 14, 2011·Biological Reviews of the Cambridge Philosophical Society·Gordon R Ultsch
Mar 29, 2014·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Roy E Weber
Jun 15, 2007·Respiratory Physiology & Neurobiology·Roy E Weber
Jun 29, 2007·Respiratory Physiology & Neurobiology·Carlos A Navas, José Guilherme Chauí-Berlinck
Nov 24, 2004·Respiratory Physiology & Neurobiology·Roy E Weber, Angela Fago
Sep 7, 2005·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Fumio ShishikuraTakatoshi Nagai
Aug 2, 2016·Journal of Wildlife Diseases·Samanta ZevallosRichard P Reading
Oct 12, 2002·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Roy E WeberCarlos Monge

Related Concepts

Adaptation, Physiological
Altitude
Salientia
Carbon Dioxide
Red Blood Cell Count Measurement
Hematocrit Procedure
Eryhem
Hydrogen-Ion Concentration
Dioxygen
Oxygen Consumption

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