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Gas transport and oxygen storage capacity in some pinnipeds and the sea otter.
Air breathing in the teleost Symbranchus marmoratus.
- K. Johansen
- Environmental ScienceComparative biochemistry and physiology
- 1 June 1966
OXYGEN CONSUMPTION AND SWIMMING PERFORMANCE IN HYPOXIA-ACCLIMATED RAINBOW TROUT SALMO GAIRDNERI
Blood studies showed that hypoxia-acclimated fish had lower ATP concentrations and P50 values, while these factors may increase the blood oxygen loading capacity, the change is apparently not enough markedly to improve swimming performance or oxygen consumption in Hypoxia and/or exercise.
Respiration in the African lungfish Protopterus aethiopicus. I. Respiratory properties of blood and normal patterns of breathing and gas exchange.
Gas analysis of blood samples drawn from unanaesthetized, free-swimming fishes attested to the important role of the lung in gas exchange and the high degree of functional in the circulation of oxygenated and deoxygenated blood.
THE VENTILATION, EXTRACTION AND UPTAKE OF OXYGEN IN UNDISTURBED FLOUNDERS, PLATICHTHYS FLESUS: RESPONSES TO HYPOXIA ACCLIMATION
The chronically hypoxic fish acclimated to chronic hypoxia and studied in hypoxic water show anunchanged O2-extraction of 52% in spite of a nearly two-fold increase inventilation relative to that of the normoxia acclimate fish.
Blood Gas Transport in the Cephalopod, Sepia Officinalis
Blood gas transport was studied in unrestrained free-swimming cuttlefish, Sepia officinalis, following cannulations of an efferent branchial (arterial) vessel and the vena cava cephalica with indwelling catheters to encourage O 2 unloading in the tissues, while promoting efficient O 2 loading in the gills.
Respiration in a primitive air breather, Amia calva.
Gravitational haemodynamics and oedema prevention in the giraffe
Investigating adaptive mechanisms to orthostatic pressure changes in giraffes revealed that arterial pressure near the giraffe heart is about twice that in humans, to provide more normal blood pressure and per-fusion to the brain.
Blood respiratory properties of rainbow trout (Salmo gairdneri) kept in water of high CO2 tension.
- F. Eddy, J. P. Lomholt, R. Weber, K. Johansen
- Environmental ScienceThe Journal of experimental biology
- 1 April 1977
Fish entering high CO2 water suffered a sharp decrease in blood pH which significantly reduced O2 transport by the blood, but after a few hours considerable compensation was achieved and acid-base balance in hypercapnic fish is discussed with particular reference to the role of the branchial ion exchanges.