Bimodal oxygen uptake in a freshwater air-breathing fish,Notopterus chitala

1986 ◽  
Vol 33 (3) ◽  
Author(s):  
Tapan K. Ghosh ◽  
Amita Moitra ◽  
Gopal K. Kunwar ◽  
Jyoti S. D. Munshi
Keyword(s):  
Oxygen Uptake ◽  
Air Breathing

The Behaviour, Survival and Respiration of the Cockles Cerastoderma Edule and C. Glaucum in Air

1972 ◽  
Vol 52 (3) ◽  
pp. 661-680 ◽  
Author(s):  
C. R. Boyden
Keyword(s):  
Oxygen Uptake ◽  
Behaviour Pattern ◽  
Air Breathing ◽  
Cerastoderma Edule ◽  
Anoxic Conditions ◽  
Metabolic Scope ◽  
Uptake Rates

Aspects of the physiology of the two cockles Cerastoderma edule (L.) and C. glaucum (Poiret) in air have been investigated. Both cockles exhibit bradycardia during exposure and are similarly tolerant of anoxic conditions, but C. edule survives longer in air than C. glaucum. This is accounted for by the fact that C. edule displays a behaviour pattern of valve movements upon emersion which allows air-breathing. Oxygen uptake rates of this cockle measured in air lie close to the lowest rates recorded in water, and are considered to approximate to a basal or quiescent level. C. glaucum does not air-breathe and is restricted to lowest shore levels. Values for ‘maximal’ levels of oxygen uptake in water have also been obtained together with estimates of metabolic scope for the cockle.

Effects of hypoxia on the partitioning of oxygen uptake and the rise in metabolism during digestion in the air-breathing fish Channa striata

Aquaculture ◽  
2012 ◽  
Vol 364-365 ◽  
pp. 137-142 ◽  
Author(s):  
Sjannie Lefevre ◽  
Do Thi Thanh Huong ◽  
Nguyen Thanh Phuong ◽  
Tobias Wang ◽  
Mark Bayley
Keyword(s):  
Oxygen Uptake ◽  
Air Breathing ◽  
Channa Striata

The partitioning of oxygen uptake from air and from water by the large obligate air-breathing teleost pirarucu (Arapaima gigas)

1978 ◽  
Vol 56 (4) ◽  
pp. 974-976 ◽  
Author(s):  
E. Don Stevens ◽  
George F. Holeton
Keyword(s):  
Oxygen Uptake ◽  
Air Breathing ◽  
Anoxic Water ◽  
Arapaima Gigas ◽  
Hypoxic Water

Pirarucu, weighing 2 to 3 kg, ventilated their gills 16 to 24 times per minute and ventilated their lungs every 1 to 2 min. Average oxygen uptake from water was 23 mg∙h−1∙kg−1; average oxygen uptake from air was 80 mg∙h−1∙kg−1. That is, in normoxic water they obtain about 75% of their oxygen from air, and never less than 50% from air. In hypoxic water the fraction from air increases, ultimately to 100% in anoxic water.

Partitioning of oxygen uptake and cost of surfacing during swimming in the air-breathing catfish Pangasianodon hypophthalmus

2012 ◽  
Vol 183 (2) ◽  
pp. 215-221 ◽  
Author(s):  
Sjannie Lefevre ◽  
Tobias Wang ◽  
Do Thi Thanh Huong ◽  
Nguyen Thanh Phuong ◽  
Mark Bayley
Keyword(s):  
Oxygen Uptake ◽  
Air Breathing ◽  
Pangasianodon Hypophthalmus

Biomodal Gas Exchange During Variation in Environmental Oxygen and Carbon Dioxide in the Air Breathing Fish Trichogaster Trichopterus

1979 ◽  
Vol 82 (1) ◽  
pp. 197-213
Author(s):  
WARREN W. BURGGREN
Keyword(s):  
Carbon Dioxide ◽  
Gas Exchange ◽  
Oxygen Uptake ◽  
Total Carbon ◽  
Co2 Uptake ◽  
Air Breathing ◽  
Air Convection ◽  
Respiratory Homeostasis ◽  
Respiratory Medium ◽  
Suprabranchial Chamber

Gas exchange in the gourami, Trichogaster trichopterus, an obligate air breather, is achieved both by branchial exchange with water and aerial exchange via labyrinth organs lying within the suprabranchial chamber. Ventilation of the suprabranchial chamber, MOO2, MCOCO2, gas exchange ratios of both gills and labyrinth organs, and air convection requirements have been measured under conditions of hypoxia, hyperoxia or hypercapnia in either water or air. In undisturbed fish in control conditions (27 °C), air breathing frequency was 12 breaths/h, gas tidal volume 30 μl/g, total oxygen uptake 5.2 μ.M/g/h and total carbon dioxide excretion 4.1 μM/g/h, indicating a total gas exchange ratio of approximately 0.8. The aerial labyrinth organs accounted for 40% of oxygen uptake but only 15% of carbon dioxide elimination. Hypoxia, in either inspired water or air, stimulated air breathing. Total MOO2 was continuously maintained at or above control levels by an augmentation of oxygen uptake by the labyrinth during aquatic hypoxia or by the gills during aerial hypoxia. Hypoxia had no effect on MCOl partitioning between air and water. Hypercapnia in water greatly stimulated air breathing. About 60% of total MCOCO2 then occurred via aerial excretion, a situation unusual among air breathing fish, enabling the overall gas exchange to remain at control levels. Aerial hypercapnia had no effect on air breathing or O2 partitioning, but resulted in a net aerial CO2 uptake and a decrease in overall gas exchange ratio. Trichogaster is thus an air breathing fish which is able to maintain a respiratory homeostasis under varying environmental conditions by exploiting whichever respiratory medium at a particular time is the most effective for O2 uptake and CO2 elimination.

How cranefly larvae breathe

1982 ◽  
Vol 60 (3) ◽  
pp. 310-317 ◽  
Author(s):  
Gordon Pritchard ◽  
Mary Stewart
Keyword(s):  
Gas Exchange ◽  
Oxygen Uptake ◽  
Larval Stage ◽  
The Body ◽  
Larval Life ◽  
Central Scar ◽  
Air Breathing ◽  
Lung Functions ◽  
Terrestrial Habitats

Aeropyles in the spiracles of the larvae of the terrestrial Tipula paludosa and the aquatic but air-breathing Pedicia parvicellula and an unidentified Tipula are illustrated. In T. paludosa these aeropyles are present and open throughout larval life and through the pharate pupal phase. By contrast, the aeropyles of the aquatic T. sacra and T. abdominalis are essentially closed and, in T. sacra at least, appear not to function during the larval stage. Gas exchange must be effected cutaneously in these latter species and, in T. sacra, the spiracular lobes and perhaps the smaller lobes along the body are principal sites of oxygen uptake. However, the larval spiracles of T. sacra do function during the terrestrial pharate pupal phase, when the central scar plug of the spiracle breaks down. Tipula paludosa has a well-developed "tracheal lung" emanating from the spiracular atrium, but this is absent in T. sacra. It is suggested that this lung functions as a tracheal gill when terrestrial habitats become flooded.

Oxygen uptake in air and water in the air-breathing reedfish Calamoichthys calabaricus: role of skin, gills and lungs

1982 ◽  
Vol 97 (1) ◽  
pp. 179-186
Author(s):  
R. Sacca ◽  
W. Burggren
Keyword(s):  
Gas Exchange ◽  
Oxygen Uptake ◽  
Natural Environment ◽  
Average Duration ◽  
O2 Uptake ◽  
Total Oxygen ◽  
Air Exposure ◽  
Air Breathing

The reedfish Calamoichthys calabaricus (Smith) is amphibious, making voluntary excursions on to land (in a simulated natural environment) an average of 6 +/− 4 times/day for an average duration of 2.3 +/− 1.3 min. Oxygen uptake is achieved by the gills, skin and large, paired lungs. In water at 27 degrees C, total oxygen uptake is 0.088 ml O2/g.h. The lungs account for 40%, the gills 28%, and the skin 32% of total VO2. Total oxygen uptake during 2 h of air exposure increases from 0.117 ml O2/g.h to 0.286 ml O2/g.h, due largely to an enhanced lung VO2 and a small increase in skin VO2. Calamoichthys is both capable of aerial gas exchange and adapted to maintain O2 uptake during brief terrestrial excursions.

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