Oxygen Consumption during Embryonic Development of the Mudskipper (Periophthalmus modestus): Implication for the Aerial Development in Burrows

2016 ◽  
pp. 83-92 ◽  
Author(s):  
Aya Etou ◽  
Tatsusuke Takeda ◽  
Yu Yoshida ◽  
Atsushi Ishimatsu
Keyword(s):  
Oxygen Consumption ◽  
Embryonic Development

Embryological Development of Oxygen Consumption and Egg Parameters in the Semi-altricial Australian Diamond Dove, Geopelia cuneata

1997 ◽  
Vol 45 (3) ◽  
pp. 331 ◽  
Author(s):  
Roland Prinzinger ◽  
Murat Biricik ◽  
Volker Dietz ◽  
Elke Schleucher
Keyword(s):  
Oxygen Consumption ◽  
Embryonic Development ◽  
Lipid Content ◽  
Mean Value ◽  
Egg Mass ◽  
Embryological Development ◽  
Plateau Phase ◽  
The Mean ◽  
Altricial Birds

Diamond dove eggs show characteristics typical of semi-altricial birds. All egg parameters that we examined were within the expected range for semi-altricial birds; only the relative portion of lipid content (7·9% of egg mass) was different from (25% higher) the mean value for comparable-sized eggs of semi- altricial birds. The embryonic development of oxygen consumption shows a clear plateau phase with values within the expected range for semi-altricial species. The plateau occurs at 83·0 ± 6·0% of incubation, and is about 1 day in duration; the oxygen consumption per egg is 42·2 ± 3·14 mL per day and 0·80 ± 0·06 mL per g per h, respectively.

scholarly journals RELATIONSHIP BETWEEN THE ACTIVITY OF THE SUCCINOXIDASE SYSTEM AND THE RATE OF OXYGEN CONSUMPTION DURING THE EMBRYONIC DEVELOPMENT OF THE MEALWORM, TENEBRIO MOLITOR LINNAEUS

1955 ◽  
Vol 38 (6) ◽  
pp. 729-734 ◽  
Author(s):  
Daniel Ludwig ◽  
Mary C. Barsa
Keyword(s):  
Oxygen Consumption ◽  
Embryonic Development ◽  
Cytochrome Oxidase ◽  
Succinic Dehydrogenase ◽  
Respiratory Metabolism ◽  
Parental Age ◽  
Embryonic Period ◽  
A Value ◽  
Rate Of Oxygen Consumption ◽  
Rate Limiting

1. Readings were made on the rates of oxygen consumption and on the activities of the succinoxidase system of eggs of the mealworm for each day of embryonic development at 30°C. 2. The rate of oxygen consumption, expressed as microliters/50 eggs/hour, was low (4.89) in newly laid eggs. It rose to 7.41 during the next 24 hours, remained at this level for the next 2 days, and then increased during the remainder of the embryonic period reaching a high value of 14.79 at the time of hatching. 3. The activity of cytochrome oxidase in eggs from newly emerged beetles, expressed as Δ log [Cy Fe++]/minute, remained at a value of 0.042 during the first half of the embryonic period, increasing to 0.233 during the latter half of this period. 4. The activity of succinic dehydrogenase showed the same series of changes except at much lower values. Expressed as Δ log [Cy Fe+++]/minute, they ranged from 0.010 in the newly laid egg to 0.034 at the end of the embryonic period. 5. The activity of cytochrome oxidase of the egg was found to decrease with parental age. Eggs from newly emerged beetles had activity values considerably higher than those of beetles 6 or 8 weeks after emergence. However, no comparable changes were noted in the activity of succinic dehydrogenase or in the rate of oxygen consumption. These observations suggest that cytochrome oxidase is not a rate-limiting enzyme in the respiratory metabolism of the mealworm egg.

Fixed patterns of bradycardia during late embryonic development in domestic fowl with C locus mutations

1995 ◽  
Vol 268 (1) ◽  
pp. H56-H60 ◽  
Author(s):  
R. S. Howe ◽  
W. W. Burggren ◽  
S. J. Warburton
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Embryonic Development ◽  
Structural Gene ◽  
Domestic Fowl ◽  
Embryonic Mortality ◽  
White Leghorn ◽  
Equivalent Rate ◽  
Mutant Strains ◽  
White Leghorns

A predictable late embryonic bradycardia (relative to normal White Leghorn chickens) has been documented in chicken strains with C locus mutations. The basis of the bradycardia remains unknown but clearly is related to a mutation at the C locus, which contains the structural gene for tyrosinase. When compared with the heart rate of normal White Leghorns (approximately 295–305 beats/min from day 8 to day 20 of incubation), ca/ca and other C locus mutants showed a 10–12% reduction in heart rate during the last 4 days of incubation. Embryonic mortality occurred in both mutant and normal strains at an equivalent rate (approximately 23%); a significant bradycardia (when compared with surviving embryos of the same strain) developed on the day before death in White Leghorn but not mutant strains. The bradycardia did not affect embryonic oxygen consumption (approximately 0.2 ml O2.egg-1.min-1 at day 14 and 0.4 ml O2.egg-1.min-1 at day 20), which showed only minor differences between strains that can be attributed to differences in embryonic mass on days 16–20.

Live Confocal Analysis of Fertilization and Early Development

2001 ◽  
Vol 7 (S2) ◽  
pp. 1012-1013
Author(s):  
Uyen Tram ◽  
William Sullivan
Keyword(s):  
Drosophila Melanogaster ◽  
Embryonic Development ◽  
Real Time ◽  
Early Development ◽  
Fluorescent Probes ◽  
Primary Defect ◽  
Fluorescent Analysis ◽  
Dynamic Event ◽  
Enormous Amount ◽  
Fluorescent Studies

Embryonic development is a dynamic event and is best studied in live animals in real time. Much of our knowledge of the early events of embryogenesis, however, comes from immunofluourescent analysis of fixed embryos. While these studies provide an enormous amount of information about the organization of different structures during development, they can give only a static glimpse of a very dynamic event. More recently real-time fluorescent studies of living embryos have become much more routine and have given new insights to how different structures and organelles (chromosomes, centrosomes, cytoskeleton, etc.) are coordinately regulated. This is in large part due to the development of commercially available fluorescent probes, GFP technology, and newly developed sensitive fluorescent microscopes. For example, live confocal fluorescent analysis proved essential in determining the primary defect in mutations that disrupt early nuclear divisions in Drosophila melanogaster. For organisms in which GPF transgenics is not available, fluorescent probes that label DNA, microtubules, and actin are available for microinjection.

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