The effect of temperature on the oxygen consumption and developmental rate of the embryos of Callinectessapidus Rathbun

1. The rate of respiration (as expressed in c.c. O2 per gram embryo per hour) of the embryos of Salmo fario remains constant at any given temperature until the embryo has reached its maximum growth-rate, after this point it declines. It is suggested that the rate of respiration may be proportional to the amount of available yolk. 2. When incubated at 7° C. the time required to complete development after hatching was 58 days and the total oxygen consumed by an average embryo during this period was 20·31 c.c. (N.T.P.). At 12° the time required for the completion of development was reduced to 27 days, but the oxygen consumption remained practically unchanged at 20·71 c.c. At 3° C. the time required for development was 108 days and the oxygen consumption was 26·96 c.c. per embryo. 3. At 7 and 12° C. the efficiency of development was found to be identical with the value given by Gray for 11·5° C., viz. 63 per cent.; at 3°C. the average efficiency over the period considered was only 54 per cent. 4. It is suggested that, between the limits of temperature to which a trout egg is normally exposed, the effect of temperature on respiration is neither greater nor less than its effect on the growth-rate; possibly both processes are dependent on the same controlling factor. Above and below this range of temperature, the relative intensity of the respiratory processes (to those of growth) is increased, and a smaller embryo is the final result of incubation.

Download Full-text

Hibernation, temperature and rates of oxidative phosphorylation by heart mitochondria

American Journal of Physiology-Legacy Content ◽

10.1152/ajplegacy.1960.198.2.463 ◽

1960 ◽

Vol 198 (2) ◽

pp. 463-466 ◽

Cited By ~ 24

Author(s):

Frank E. South

Keyword(s):

Oxygen Consumption ◽

Oxidative Phosphorylation ◽

Incubation Temperature ◽

Regression Line ◽

Vertical Displacement ◽

Heart Mitochondria ◽

Oxidative Enzymes ◽

Effect Of Temperature ◽

The Difference

The effect of temperature on rates of oxidative phosphorylation (pyruvate substrate) by heart mitochondria obtained from hibernating hamsters, control hamsters and rats was studied. Apparent energies of activation ( Ea) determined between 5° and 24°C were, respectively, 20.4, 20.8 and 28.3 Kcal. for the rates of oxygen consumption and 20.6, 21.4 and 29.5 Kcal. for the rates of phosphorylation. The difference between the rats and either group of hamsters were significant statistically. The slope of the regression line fitted to the data obtained from hibernating animals did not differ significantly from that of the control hamsters. However, a parallel vertical displacement of the lines indicated a probable increase in these oxidative enzymes upon preparation for, or during, hibernation. No significant alterations in the efficiency of oxidative phosphorylation with variations in the incubation temperature were noted in any of the preparations.

Download Full-text

The Effect of Temperature on Oxygen Consumption in Four Species of Freshwater Fairy Shrimp (Crustacea:Anostraca)

Freshwater Invertebrate Biology ◽

10.2307/1467103 ◽

1985 ◽

Vol 4 (3) ◽

pp. 133-137 ◽

Cited By ~ 3

Author(s):

Donald H. Hazelwood ◽

Susan E. Hazelwood

Keyword(s):

Oxygen Consumption ◽

Effect Of Temperature ◽

Fairy Shrimp

Download Full-text

Effect of Temperature Upon the Developmental Rate of the Embryo of the Diamond Back Terrapin (Malaclemys centrata Lat.)

The American Naturalist ◽

10.1086/280848 ◽

1939 ◽

Vol 73 (747) ◽

pp. 381-384 ◽

Cited By ~ 1

Author(s):

Bert Cunningham

Keyword(s):

Developmental Rate ◽

Effect Of Temperature

Download Full-text

The relationship between cirral activity and oxygen uptake in Balanus balanoides

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315400054916 ◽

1965 ◽

Vol 45 (2) ◽

pp. 387-403 ◽

Cited By ~ 43

Author(s):

R. C. Newell ◽

H. R. Northcroft

Keyword(s):

Body Weight ◽

Oxygen Consumption ◽

Oxygen Uptake ◽

Mantle Cavity ◽

The Body ◽

Effect Of Temperature ◽

Zero Rate ◽

Rate Of Oxygen Consumption ◽

The Relationship ◽

Balanus Balanoides

The rate of cirral beat of Balanus balanoides is related to the logarithm of the body weight as an exponential function. In any one animal, there is little effect of temperature on cirral activity between 7·5° and 10° C. Between 10° and 20° C, however, there is a rapid increase in cirral beat with temperature followed by a fall at temperatures above 20° C.Balanus balanoides exhibits a fast, medium and zero rate of oxygen consumption. These rates of oxygen consumption correspond with (a) normal cirral beating, (b) ‘testing’ activity with no cirral movement, and (c) with the closure of the mantle cavity. Both of the possible levels of oxygen uptake are related to the logarithm of the body weight in a logarithmic fashion over the temperature range 7·5°–22·5° C. Temperature affects the two rates of oxygen consumption differently. In the slower rate (rate B) there is an increase in the rate of oxygen consumption between 7·5° and 14° C but there is no significant increase in the rate of oxygen consumption between 14° and 22·5 C°.

Download Full-text