The influence of season, concentration of sea water and environmental temperature upon the oxygen consumption of tissues in Venus mercenaria

1946 ◽  
Vol 102 (2) ◽  
pp. 143-158 ◽  
Author(s):  
Hoyt S. Hopkins
Keyword(s):  
Oxygen Consumption ◽  
Environmental Temperature ◽  
Sea Water

The Organic Metabolism of Sea-water with Special Reference to the Ultimate Food Cycle in the Sea

1935 ◽  
Vol 20 (2) ◽  
pp. 181-196 ◽  
Author(s):  
Ancel Keys ◽  
E. H. Christensen ◽  
August Krogh
Keyword(s):  
Oxygen Consumption ◽  
Special Reference ◽  
Oxygen Content ◽  
Sea Water ◽  
Raw Water

Studies are reported of the behaviour of stored sea-water with regard to oxygen, ammonia, and bacteria content in relation to the conditions of storage and to the effect of various filtration procedures.When sea-water is sterilised by filtration and stored in the dark, the oxygen content remains constant or diminishes only by less than 0·07c.c. per litre in several hundred hours.In non-sterile experiments there is always an oxygen consumption roughly parallel to a bacterial multiplication which begins very suddenly after collection of the water. These effects are greatest in “raw” water, less in paper-filtered water and least in water which is doubly filtered.

scholarly journals KONSUMSI OKSIGEN BENIH IKAN KERAPU BEBEK (Cromileptes altivelis) UKURAN PANJANG 5-7 CM

2012 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Yopi Novita ◽  
Budhi Hascaryo Iskandar ◽  
Bambang Murdiyanto ◽  
Budy Wiryawan ◽  
Hariyanto Hariyanto
Keyword(s):  
Oxygen Consumption ◽  
Dissolved Oxygen ◽  
Body Length ◽  
Oxygen Consumption Rate ◽  
Consumption Rate ◽  
Sea Water ◽  
Consumption Level ◽  
Water Measurement

Disolved oxygen plays an important role for fish living in its life environment. Information on the ammount of oxygen consumption of a fish in certain volume of water is needed in order to give balancing between the ammount of disolved oxygen and fish in it. The objective of this research is obtaining oxygen consumption level of a juvenile of humpback grouper (Cromileptes altivelis) of 5-7 cm body length. Oxygen consumption of fish was measured using a tube that equiped with DO tool (dissolved oxygent, DO), and the tube was filled by sea water. Measurement of oxygen con-sumption of juvenil was done by measuring the concentration of dissolved oxygen from sea water in the respirometer tube, began when fish had entered into the respirometer tube up to two hours observation. The result showed that oxygen consumption rate of a juvenile of humpback grouper (Cromileptes altivelis) of 5-7 cm length, is ranging between 0.816 and 1.734 mg/hour.

scholarly journals Aedes Aegypti: Energetics of Osmoregulation

1982 ◽  
Vol 101 (1) ◽  
pp. 135-141 ◽  
Author(s):  
H.A. EDWARDS
Keyword(s):  
Oxygen Consumption ◽  
Energy Cost ◽  
Sea Water ◽  
External Medium ◽  
Minimum Energy ◽  
Body Volume ◽  
Wet Weight ◽  
Minimum Energy Cost ◽  
Anal Papillae ◽  
Theoretical Minimum

1. Oxygen consumption of A. aegypti larvae, about 210 mul l g−1 tissue wet weight h−1, does not change when the salinity of the environment is changed. The number of mitochondria in the anal papillae, a salt-absorbing epithelium, increases as the external medium is diluted. There is no difference in oxygen consumption between isolated anal papillae in 0, 2 and 20% sea water. The papillae represent about 5% of body volume and their oxygen consumption is about 2% of the animal's total. The theoretical minimum energy cost of osmoregulation is four orders of magnitude smaller than the measured figure for the anal papillae alone. Osmoregulatory phenomena which would explain the recorded observations are discussed.

Osmotic balance and respiration in the hermit crab, Pagurus bernhardus, exposed to fluctuating salinities

1978 ◽  
Vol 58 (4) ◽  
pp. 869-876 ◽  
Author(s):  
Sandra E. Shumway
Keyword(s):  
Oxygen Consumption ◽  
Sea Water ◽  
External Medium ◽  
Temporary Increase ◽  
Tissue Water ◽  
Low Salinity ◽  
Significant Difference ◽  
Rate Of Oxygen Consumption ◽  
Osmotic Balance ◽  
Pagurus Bernhardus

Specimens of Pagurus bernhardus (with and without shells) were exposed to both gradual (sinusoidal) and abrupt (square-wave) salinity fluctuations and changes in haemolymph osmolality, tissue water content and oxygen consumption monitored. Oxygen consumption was also monitored under steady-state conditions; under these conditions there was no significant difference between the rate of oxygen consumption by animals with shells and animals without shells. Oxygen consumption was found to vary with body weight according to the equation O2 consumption = 0·292 W0·668. During exposure to fluctuating salinities the crabs with shells were seen to increase loco-motory activity when the external medium declined to approximately 75% sea water. Haemolymph osmolality values followed the same pattern of change as the external medium; the haemolymph of crabs without shells became significantly more dilute during exposure to low salinity than did that of crabs with shells. P. bernhardus showed significant increases and decreases in hydration level as salinities fell and rose respectively. Crabs with shells showed a marked temporary increase in oxygen consumption when the external medium declined to approximately 75% sea water; crabs without shells showed no such response. The importance of the shell as a means of protection against dilute media is discussed.

scholarly journals On the function of chlorocruorin

1940 ◽  
Vol 129 (855) ◽  
pp. 137-153 ◽  
Keyword(s):  
Carbon Monoxide ◽  
Oxygen Consumption ◽  
Dissolved Oxygen ◽  
Sea Water ◽  
Oxygen Carrier ◽  
Significant Rise ◽  
Oxygen Concentrations

1.The oxygen consumption of Sabella decreases soon after the concentration of dissolved oxygen in the sea water falls below the value corresponding to air saturation both at 10 and 17° C. Above air saturation at 17° C there is no significant rise in oxygen consumption. 2. The oxygen consumption of Sabella whose chlorocruorin has been converted to carboxychlorocruorin is lower than that of normal worms. This is the case at air saturation of the water and at oxygen concentrations below air saturation both at 10 and 17° C. 3. The fall in oxygen consumption of the animals after treatment with carbon monoxide is not due to an action of the latter on cell enzymes. 4. It follows that chlorocruorin functions as an oxygen carrier in Sabella at all temperatures and oxygen pressures to which the animals are subjected in nature.

Observations on the biology and submergence behaviour of some littoral beetles

1971 ◽  
Vol 51 (2) ◽  
pp. 375-386 ◽  
Author(s):  
P. D. Evans ◽  
C. N. E. Ruscoe ◽  
J. E. Treherne
Keyword(s):  
Oxygen Consumption ◽  
Salt Marshes ◽  
Sea Water ◽  
Significant Proportion ◽  
Drastic Reduction ◽  
Effective Contact ◽  
Direct Exposure ◽  
Drainage Channels ◽  
Mode Of Life ◽  
Burrowing Activity

SUMMARYThe four species studied (Bledius spectabilis, Heterocerus fenestratus, Dichirotrichus pubescens and Cillenus lateralis) are most commonly found in a region delimited by the anaerobic mud of the lower bank and the dense marsh bordering the drainage channels in tidal salt-marshes at Scolt Head Island, Norfolk.Experimental submersion of the beetles in sea water was found to induce an apparent anoxic condition which was associated with a drastic reduction in oxygen consumption. On return to air there was a large increase in oxygen consumption characteristic of an appreciable oxygen debt.The use of the physiological responses to submergence as an indicator of effective contact with water revealed that their subterranean mode of life largely prevents direct exposure of the beetles to sea water in natural conditions. A significant proportion of Heterocerus fenestratus were, however, found to be vulnerable to flooding by sea water during tidal coverage of the burrow system.These results are considered in relation to the observations made on the behaviour and burrowing activity of the various species.

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