scholarly journals Post-Embryonic Development of Aedes (Stegomyia) aegypti Linnaeus, 1762 at Different Temperatures and CO2 Concentrations, and Their Influences on Hatching and Development of Stabilized Population

2020 ◽  
Author(s):  
Ediane Oliveira do Amaral ◽  
André Felipe da Silva ◽  
William Ribeiro da Silva ◽  
Karina Rossi da Silva ◽  
Rosemary Aparecida Roque ◽  
...  
Keyword(s):  
Embryonic Development ◽  
Co2 Concentrations ◽  
Different Temperatures

Thermal influence on the embryonic development and hatching rate of the flameback pygmy angelfish Centropyge aurantonotus eggs

Zygote ◽  
2019 ◽  
Vol 28 (1) ◽  
pp. 80-82
Author(s):  
Raoani Cruz Mendonça ◽  
Sarah Pittigliani Ikebata ◽  
Sérgio Leandro Araújo-Silva ◽  
João Vitor Azevedo Manhães ◽  
Mônica Yumi Tsuzuki
Keyword(s):  
Embryonic Development ◽  
Incubation Temperature ◽  
Abiotic Factors ◽  
Environmental Parameters ◽  
Hatching Rate ◽  
Influence Of Temperature ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
Thermal Influence ◽  
Hatching Rates

SummaryThe flameback pygmy angelfish Centropyge aurantonotus, highly appreciated and valued by the aquarium market, is heavily harvested and traded. Temperature is one of the abiotic factors that has the most influence on fish development, especially in the early stages of life. For captive production, it is essential to know the appropriate environmental parameters for each species. In this sense, this study aimed to evaluate the influence of temperature on the embryonic development and hatching rates of C. aurantonotus incubated at six different temperatures (20, 22, 24, 26, 28, 30°C). Embryonic development events were very similar in terms of morphological and chronological characteristics compared with other species of the genus Centropyge. Incubation time was inversely proportional to temperature. The treatment at 22°C required twice the time of that required by 30°C treatment for hatching to occur. The best incubation temperature range was 24–28°C. Values below 22°C and at 30°C showed lower hatching rates compared with other treatments. Based on these results, the recommended temperature at which to incubate C. aurantonotus eggs is between 24–28°C.

Effect of temperature on embryonic development of Melanotaenia boesemani (Allen and Cross, 1982)

Zygote ◽  
2015 ◽  
Vol 24 (2) ◽  
pp. 301-309 ◽  
Author(s):  
Marcella Costa Radael ◽  
Leonardo Demier Cardoso ◽  
Dalcio Ricardo de Andrade ◽  
André Veloso Ferreira ◽  
Douglas da Cruz Mattos ◽  
...  
Keyword(s):  
Embryonic Development ◽  
Effect Of Temperature ◽  
Hatching Rate ◽  
Oil Droplets ◽  
Development Stages ◽  
Different Temperatures ◽  
Effects Of Temperature ◽  
The Moment ◽  
Time Required ◽  
Faster Development

SummaryThe present study aimed to provide data on the time required for Melanotaenia boesemani to complete embryonic development, and to investigate the influence that incubation at different temperatures caused in this species. The effects of temperature on the time and hatching rate are presented, as well as information related to embryonic development stages. After fertilization, the eggs were kept in incubators at 23, 26, 29 or 32°C and observed at predetermined times until the moment of hatching. Stages of development were identified and classified according to morphological and physiological characteristics. Oil droplets were visualized inside the eggs as well as filament adhesion present at the chorion. Embryonic development was similar to that observed in other species of the genus Melanotaenia with hatching and faster development in higher temperatures.

Embryonic development of the newt Triturus italicus in relation to temperature

1998 ◽  
Vol 19 (4) ◽  
pp. 345-355 ◽  
Author(s):  
S. Tripepi ◽  
F. Rossi ◽  
G. Peluso
Keyword(s):  
Embryonic Development ◽  
Development Time ◽  
Normal Development ◽  
Different Temperatures

AbstractThe embryonic development of Triturus italicus was observed at different temperatures. Normal development occurred between 10°C and 22.5°C. In this range of temperatures an hyperbolic relationship between development time and temperature was confirmed.

Population Dynamics of Limnetic Cladocera in a Beaver Pond

1975 ◽  
Vol 32 (3) ◽  
pp. 341-346 ◽  
Author(s):  
Judith K. Kwik ◽  
John C. H. Carter
Keyword(s):  
Population Dynamics ◽  
Embryonic Development ◽  
Carrying Capacity ◽  
Sampling Errors ◽  
Beaver Pond ◽  
Bosmina Longirostris ◽  
Georgian Bay ◽  
Development Times ◽  
Different Temperatures ◽  
Ceriodaphnia Quadrangula

In a small, shallow, predation free beaver pond near Georgian Bay, Ontario Ceriodaphnia quadrangula was monacmic and Daphnia ambigua and Bosmina longirostris triacmic. Each species peaked and declined rapidly, presumably overshooting the carrying capacity of a food limited environment. Embryonic development times of each species at different temperatures was determined in the laboratory and fitted with Bĕlahrádek’s function. Calculated instantaneous rates of birth and death were normal for D. ambigua and C. quadrangula but too low to account for the rapid fluctuations in numbers of B. longirostris, suggesting occasional gross sampling errors. Bosmina longirostris may periodically abandon the limnoplankton for a benthic existence thus avoiding capture.

scholarly journals Temporal development of Drosophila embryos is highly robust across a wide temperature range

2018 ◽  
Author(s):  
Jeronica Chong ◽  
Christopher Amourda ◽  
Timothy E. Saunders
Keyword(s):  
Embryonic Development ◽  
Local Environment ◽  
Morphogen Gradient ◽  
Temporal Development ◽  
Developmental Systems ◽  
History Dependence ◽  
Wide Range ◽  
Different Temperatures ◽  
Species Specific ◽  
Drosophila Embryos

AbstractDevelopment is a precisely coordinated process in both space and time. Spatial precision has been quantified in a number of developmental systems, and, for example, such data has contributed significantly to our understanding of morphogen gradient interpretation. However, comparatively little quantitative analysis has been performed on timing and temporal coordination during development. Here, we use Drosophila to explore the temporal robustness of embryonic development within physiologically normal temperatures. We find that development is temporally very precise across a wide range of temperatures in all three Drosophila species investigated. However, we find temperature dependence in the heterochronicity. A simple model incorporating history-dependence can explain the developmental temporal trajectories. Interestingly, the history-dependence is temperature specific with either effective negative or positive feedback at different temperatures. We also find that embryos are surprisingly robust to shifting temperatures during embryogenesis. We further identify differences between tropical and temperate species that are suggestive of different potential mechanisms regulating temporal development depending on the local environment. Overall, our data shows that Drosophila embryonic development is temporally robust across a wide range of temperatures but there are species specific differences.

scholarly journals Observations on the Embryonic Development of Trichuris sylvilagi (Nematoda, Trichuridae) under Laboratory Conditions

Zoodiversity ◽  
2021 ◽  
Vol 55 (4) ◽  
pp. 343-350
Author(s):  
V. Yevstafieva ◽  
V.  Melnychuk ◽  
L.  Nagorna ◽  
V.  Stybel ◽  
B.  Gutyj ◽  
...  
Keyword(s):  
Embryonic Development ◽  
Growth And Development ◽  
Lepus Europaeus ◽  
European Hare ◽  
Laboratory Conditions ◽  
Different Temperatures ◽  
Simultaneous Decrease ◽  
Favorable Temperature ◽  
Zygote Stage

In the present study, we observed in vitro the rate and stages of exogenous development of the nematode Trichuris sylvilagi Tiner, 1950 isolated from the European hare, Lepus europaeus. The viability of eggs and embryos at different temperatures was investigated. It was found that the most favorable temperature for embryonic development of the species was 30 °C, with the formation of 88.67 % of viable eggs with a motile larva in 20 days at laboratory conditions. With a decrease in temperature to 20 °C, the embryogenesis occurred in 32 days. The viability of eggs cultured at 20 °C decreased: 68.0 % of eggs reached larval stage, and 32.0 % of eggs died. At 10 °C eggs did not develop to infective stage. On the 32nd day of cultivation at 10 °C, 27.33 % of eggs remained at the zygote stage, 52.0 % at the stage of blastomere cleavage and formation, and 20.67 % died. Embryogenesis was characterized by metric changes in egg parameters. At optimal temperature, the growth and development of eggs was accompanied by an increase in the egg and plugs' width with a simultaneous decrease in their length, as well as with thinning of the shell

scholarly journals Temporal development of Drosophila embryos is highly robust across a wide temperature range

2018 ◽  
Vol 15 (144) ◽  
pp. 20180304 ◽  
Author(s):  
Jeronica Chong ◽  
Christopher Amourda ◽  
Timothy E. Saunders
Keyword(s):  
Embryonic Development ◽  
Local Environment ◽  
Temporal Development ◽  
Developmental Systems ◽  
History Dependence ◽  
Wide Range ◽  
Different Temperatures ◽  
Species Specific ◽  
Interesting Species ◽  
Drosophila Embryos

Development is a process precisely coordinated in both space and time. Spatial precision has been quantified in a number of developmental systems, and such data have contributed significantly to our understanding of, for example, morphogen gradient interpretation. However, comparatively little quantitative analysis has been performed on timing and temporal coordination during development. Here, we use Drosophila to explore the temporal robustness of embryonic development within physiologically normal temperatures. We find that development is temporally very precise across a wide range of temperatures in the three Drosophila species investigated. However, we find temperature dependence in the timing of developmental events. A simple model incorporating history dependence can explain the developmental temporal trajectories. Interestingly, history dependence is temperature-specific, with either effective negative or positive feedback at different temperatures. We also find that embryos are surprisingly robust to shifting temperatures during embryogenesis. We further identify differences between tropical and temperate species, potentially due to different mechanisms regulating temporal development that depend on the local environment. Our data show that Drosophila embryonic development is temporally robust across a wide range of temperatures. This robustness shows interesting species-specific differences that are suggestive of different sensitivity to temperature fluctuations between Drosophila species.

Embryonic development of Romanomermis communensis (Nematoda:Mermithidae) at different temperatures

1979 ◽  
Vol 57 (8) ◽  
pp. 1710-1712 ◽  
Author(s):  
D. P. Thornton ◽  
R. A. Brust
Keyword(s):  
Embryonic Development ◽  
Natural Habitat ◽  
Cell Stage ◽  
Different Temperatures

Embryos of R. communensis completed their development to the late coil stage in 16.5 days at 20 °C, 22 days at 15 °C, and 32 days at 10 °C. Embryos failed to develop at 5 °C, although 10% did reach the two-cell stage by 32 days. About 5% of the eggs at 20 and 15 °C hatched after embryonation was completed. There was no further hatching during the 32-day period of observation. The nematode is probably univoltine in its natural habitat near Churchill, Manitoba.

scholarly journals EMBRYONIC DEVELOPMENT AND HATCHING EGGS RATIO OF BLACKSADDLED CORAL GROUPER (Plectropoma laevis) AT DIFFERENT TEMPERATURE MEDIA

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Wawan Andriyanto ◽  
Bejo Slamet ◽  
I Made Dharma Jaya Ariawan
Keyword(s):  
Embryonic Development ◽  
Egg Production ◽  
Incubation Temperature ◽  
Hatching Rate ◽  
Egg Hatchability ◽  
Different Temperatures ◽  
Hatch Success ◽  
C 30 ◽  
Hatching Eggs

In seed production, the success of spawning and egg production is very important to mantain the cultivating sustainability. The quantity and quality of the blacksaddled coral grouper eggs should be properly manipulated to produce the higher values. The purpose of this study was to determine the effect of different temperatures on the results of hatch success (embryo development, incubation time, hatching rate and larvae abnormality). The eggs used were obtained from natural spawning and collected with egg collector. The fertilized eggs were incubated in four pieces of container and were treated with different temperatures of 26°C, 28°C, 30°C, and 32°C which each treatment was repeated 3 times. The incubation equipment with automatic temperature control was used in this treatment. The results showed that the eggs which were incubated at 32°C produced a faster of embryonic development and hatch within 14 hours while the temperature of 26°C took 18 hours to hatch. However, the temperature of 32°C resulted in low egg hatchability, with 60.29%, as well as the abnormalities of 8.42%. The best temperature of each treatment was obtained at the incubation temperature of 30°C, whereas the phase of the hatch was achieved within 15 hours, with egg hatchability of 92.25% and the abnormality of 6.29%. From these results, it can be concluded that the optimum incubation temperature for Blacksaddled coral grouper was 30°C. Keywords: hatching, egg of Blacksaddled coral grouper, Plectropoma laevis, incubation temperature.

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