Cardiorespiratory responses of the facultative air-breathing fish jeju, Hoplerythrinus unitaeniatus (Teleostei, Erythrinidae), exposed to graded ambient hypoxia

2004 ◽  
Vol 139 (4) ◽  
pp. 479-485 ◽  
Author(s):  
R.D. Oliveira ◽  
J.M. Lopes ◽  
J.R. Sanches ◽  
A.L. Kalinin ◽  
M.L. Glass ◽  
...  
Keyword(s):  
Air Breathing ◽  
Cardiorespiratory Responses ◽  
Ambient Hypoxia ◽  
Hoplerythrinus Unitaeniatus

Air-breathing mechanics in two Amazonian teleosts, Arapaima gigas and Hoplerythrinus unitaeniatus

1978 ◽  
Vol 56 (4) ◽  
pp. 939-945 ◽  
Author(s):  
A. P. Farrell ◽  
D. J. Randall
Keyword(s):  
Gas Pressure ◽  
Breathing Patterns ◽  
Air Breathing ◽  
Arapaima Gigas ◽  
Breathing Mechanics ◽  
Replacement Technique ◽  
Hoplerythrinus Unitaeniatus

The mechanics of air breathing in pirarucu, Arapaima gigas, and jeju, Hoplerythrinus unitaeniatus, were studied by simultaneous monitoring of air bladder gas pressure and buccal pressure. Also the effect of alterations in air bladder gas tensions on air-breathing patterns was examined by a gas replacement technique. Pirarucu surface every 4.2 min to make a single ventilation of the air bladder, whilst jeju usually make two or three ventilations at an air breath every 3.0 min. Pirarucu exhale first, then inhale, but in jeju buccal filling occurred before lung emptying. Inhalation in pirarucu is a result of air bladder aspiration combined with the action of a buccal pump; however, lung filling in jeju is achieved by a buccal pump only. The significance of aspiration breathing in pirarucu is discussed. Both fish respond similarly to alterations in air bladder gas tensions. Hyperoxia prolongs the interval between air breaths and hypercapnia reduces this interval.

Some kinetic properties of skeletal muscle pyruvate kinase from air-breathing and water-breathing fish of the Amazon

1978 ◽  
Vol 56 (4) ◽  
pp. 751-758 ◽  
Author(s):  
J. H. A. Fields ◽  
W. R. Driedzic ◽  
C. J. French ◽  
P. W. Hochachka
Keyword(s):  
Skeletal Muscle ◽  
Pyruvate Kinase ◽  
Adenosine Diphosphate ◽  
Kinetic Properties ◽  
Air Breathing ◽  
Hoplias Malabaricus ◽  
Arapaima Gigas ◽  
Saturation Kinetics ◽  
Muscle Pyruvate Kinase ◽  
Hoplerythrinus Unitaeniatus

The kinetic properties of pyruvate kinase from skeletal muscle were studied in two species of air-breathing fish, Hoplerythrinus unitaeniatus and Arapaima gigas, and two species of water-breathing fish, Hoplias malabaricus and Osteoglossum bicirrhosum. It was found that the enzymes from Hoplias and Hoplerythrinus showed hyperbolic saturation kinetics for all substrates, were activated slightly by fructose 1,6-diphosphate, and were inhibited by phosphocreatine and citrate. The enzyme from Hoplias was inhibited by alanine, whereas the enzyme from Hoplerythrinus was not. The enzymes from Arapaima and Osteoglossum showed hyperbolic saturation kinetics for adenosine diphosphate, but the saturation kinetics for phusphoenol-pyruvate were sigmoidal. These enzymes were strongly activated by fructose 1,6-diphosphate and strongly inhibited by alanine, the former completely reversing the inhibition by the latter. Phosphocreatine and citrate were also found to be inhibitors of these enzymes, but the inhibition by phosphocreatine was not reversed by additions of fructose 1,6-diphosphate. The enzymes from the water-breathing fish were more sensitive to inhibition by alanine than were those from the air-breathing fish, but in other respects the enzymes were very similar.

Selective control of branchial arch perfusion in an air-breathing Amazonian fish Hoplerythrinus unitaeniatus

1978 ◽  
Vol 56 (4) ◽  
pp. 959-964 ◽  
Author(s):  
D. G. Smith ◽  
B. J. Gannon
Keyword(s):  
Branchial Arch ◽  
Dorsal Aorta ◽  
Oxygen Loss ◽  
Air Breathing ◽  
Gas Bladder ◽  
Hypoxic Water ◽  
Major Branch ◽  
Β Adrenergic Receptors ◽  
Hoplerythrinus Unitaeniatus

Vascular responses to adrenergic and cholinergic agonists were investigated in the air-breathing teleost Hoplerythrinus unitaeniatus during in situ saline perfusion of the ventral aorta.The vasculature resembled that of other teleosts in having inhibitory β-adrenergic receptors and excitatory muscarinic receptors, probably located in the gills. The gas bladder vessels were apparently devoid of adrenergic and cholinergic receptors.The dorsal aorta was specialized between gill arches 2 and 3 in such a way that the dorsal aorta probably received most of its blood supply from arches 1 and 2. Arches 3 and 4 supplied the large coeliac artery whose major branch was to the gas bladder. Acetylcholine reduced the number of perfused gill arches so that most of the ventral aortic flow was directed towards the gas bladder through arches 3 and 4. This was seen as a possible solution to the problem of transbranchial oxygen loss that could arise if blood oxygenated at the gas bladder was exposed to hypoxic water at the gills.

scholarly journals The autonomic control and functional significance of the changes in heart rate associated with air breathing in the jeju, Hoplerythrinus unitaeniatus

2007 ◽  
Vol 210 (23) ◽  
pp. 4224-4232 ◽  
Author(s):  
D. J. McKenzie ◽  
H. A. Campbell ◽  
E. W. Taylor ◽  
M. Micheli ◽  
F. T. Rantin ◽  
...  
Keyword(s):  
Heart Rate ◽  
Functional Significance ◽  
Autonomic Control ◽  
Air Breathing ◽  
Hoplerythrinus Unitaeniatus

Air-breathing Behavior of the Jeju Fish Hoplerythrinus unitaeniatus in Amazonian Streams

Biotropica ◽  
2011 ◽  
Vol 44 (4) ◽  
pp. 512-520 ◽  
Author(s):  
João Alves Lima Filho ◽  
Jhany Martins ◽  
Rafael Arruda ◽  
Lucélia Nobre Carvalho
Keyword(s):  
Air Breathing ◽  
Hoplerythrinus Unitaeniatus

Cardiorespiratory responses to hypoxia in the African catfish, Clarias gariepinus (Burchell 1822), an air-breathing fish

2011 ◽  
Vol 181 (7) ◽  
pp. 905-916 ◽  
Author(s):  
T. C. Belão ◽  
C. A. C. Leite ◽  
L. H. Florindo ◽  
A. L. Kalinin ◽  
F. T. Rantin
Keyword(s):  
Clarias Gariepinus ◽  
African Catfish ◽  
Air Breathing ◽  
Cardiorespiratory Responses

scholarly journals Hypercarbic cardiorespiratory reflexes in the facultative air-breathing fish jeju (Hoplerythrinus unitaeniatus): the role of branchial CO2 chemoreceptors

2010 ◽  
Vol 213 (16) ◽  
pp. 2797-2807 ◽  
Author(s):  
C. de Lima Boijink ◽  
L. H. Florindo ◽  
C. A. C. Leite ◽  
A. L. Kalinin ◽  
W. K. Milsom ◽  
...  
Keyword(s):  
Air Breathing ◽  
Hoplerythrinus Unitaeniatus ◽  
Cardiorespiratory Reflexes

Hypoxic cardiorespiratory reflexes in the facultative air-breathing fish jeju (Hoplerythrinus unitaeniatus): role of branchial O2 chemoreceptors

2010 ◽  
Vol 180 (6) ◽  
pp. 797-811 ◽  
Author(s):  
Jane Mello Lopes ◽  
Cheila de Lima Boijink ◽  
Luiz Henrique Florindo ◽  
Cleo Alcantara Costa Leite ◽  
Ana Lúcia Kalinin ◽  
...  
Keyword(s):  
Air Breathing ◽  
Hoplerythrinus Unitaeniatus ◽  
Cardiorespiratory Reflexes

Renal function and acid–base regulation in two Amazonian erythrinid fishes: Hoplias malabaricus, a water breather, and Hoplerythrinus unitaeniatus, a facultative air breather

1978 ◽  
Vol 56 (4) ◽  
pp. 917-930 ◽  
Author(s):  
James N. Cameron ◽  
Chris M. Wood
Keyword(s):  
Ammonia Excretion ◽  
Titratable Acidity ◽  
Acid Excretion ◽  
Acid Base ◽  
Total Acid ◽  
Urine Ph ◽  
Air Breathing ◽  
Hoplias Malabaricus ◽  
Urinary Parameters ◽  
Hoplerythrinus Unitaeniatus

The function of the kidney in ion, water, and acid excretion was investigated in two erythrinid fishes, the water-breathing Hoplias malabaricus and the facultative air-breathing Hoplerythrinus unitaeniatus. Chronic catheterization of the urinary papilla and the dorsal aorta provided information on the urinary parameters and blood acid–base status. By monitoring total flow of urine, pH, and concentrations of Na+, Cl−, ammonia, titratable acidity, and lactate, the total renal flux of water, various ions, and total acid was computed. The kidneys of both species were found capable of acidifying urine, creating gradients of up to 620:1 for H+ ion, and contributing substantially to steady-state acid excretion. There was no significant increase in lactate or total acid efflux from urine during postoperative (metabolic) acidosis. Respiratory (hypercapnic) acidosis caused a compensatory increase in blood HCO3−, and an increase in branchial Na+ uptake (presumably by Na–H exchange), but no change in ammonia excretion. There was no renal response in one Hoplias to hypercapnia, but an increased acid excretion in one Hoplerythrinus. The behavior of the urinary excretion system appears in various respects similar to the higher vertebrates. There was no obvious correlation between renal parameters and air breathing in these two species.

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