A Comparison of the Development Rate ofProtophormia Terraenovae(Robineau-Desvoidy) Raised under Constant and Fluctuating Temperature Regimes

2004 ◽  
Vol 37 (2) ◽  
pp. 95-101 ◽  
Author(s):  
C.A. Clarkson ◽  
N.R. Hobischak ◽  
G.S. Anderson
Keyword(s):  
Development Rate ◽  
Fluctuating Temperature ◽  
Temperature Regimes ◽  
Constant And Fluctuating Temperature

Estimation of development times for immature stages of the bush fly, Musca vetustissima Walker (Diptera: Muscidae), and their simulation from air temperature and solar radiation records

1990 ◽  
Vol 80 (1) ◽  
pp. 73-78 ◽  
Author(s):  
W. G. Vogt ◽  
J.M. Walker ◽  
S Runko
Keyword(s):  
Solar Radiation ◽  
Air Temperature ◽  
Adult Development ◽  
Development Rate ◽  
Immature Stages ◽  
Rate Model ◽  
Development Times ◽  
Temperature Regimes ◽  
Non Linear ◽  
Constant And Fluctuating Temperature

AbstractImmature stages of bush fly, Musca vetustissima Walker, were reared at constant temperatures ranging from 18°C to 39°C. Mean egg to adult development times ranged from 7.0 to 25.8 days. Eggs, larval instars I, II and III, and pupae averaged, respectively, 3.1, 4.4, 5.5, 36.4 and 50.6% of the total development time. Mean development rate was a non-linear function of temperature. A non-linear development rate model accurately estimated mean development times of immature stages under both constant and fluctuating temperature regimes. Simulation of dung pad temperatures, from air temperature and solar radiation records, predicted development times of soil- and dunginhabiting stages of M. vetustissima to within 4% of those observed under field conditions.

Effect of constant and fluctuating temperature regimes and seed source on the coleoptile length of tall and semidwarf wheats

1987 ◽  
Vol 27 (1) ◽  
pp. 113 ◽  
Author(s):  
BJ Radford
Keyword(s):  
Environmental Conditions ◽  
Laboratory Experiments ◽  
Seed Source ◽  
Seed Maturation ◽  
Wheat Cultivars ◽  
Coleoptile Length ◽  
Fluctuating Temperature ◽  
Temperature Regimes ◽  
The Mean ◽  
Constant And Fluctuating Temperature

Laboratory experiments were carried out to determine the effects of constant and fluctuating temperature regimes on the final coleoptile length of 8 wheat cultivars (Banks, Cook, Gatcher, Hartog, Kite, Oxley, Shortim and Spica) and the effect of environmental conditions during seed maturation (seed source) on the coleoptile length of 5 cultivars (Banks, Bass, Cook, Kite and Oxley). Mean coleoptile length decreased from 10.8 cm at 15�C to only 3.1 cm at 35�C, a reduction within this temperature range of 1 cm for every 2.6�C rise in temperature. This indicates that, in warm soil, shallow sowing is necessary for satisfactory wheat establishment. Fluctuating temperatures (� 5�C about the mean) further reduced coleoptile length. The temperature x cultivar interaction was significant, differences among cultivars in coleoptile length occurring more at low than at high temperatures. The mean coleoptile lengths of the 8 cultivars varied from 8.7 to 14.5 cm at 15�C, but only from 2.7 to 3.6 cm at 35�C. Tall wheat cultivars (Gatcher and Spica) generally had longer coleoptiles than the 6 semidwarf cultivars. Tall wheats also had near-maximum coleoptile length at a wider range of temperatures than semidwarfs. Different environmental conditions during seed maturation (glasshouse v. field) changed the ranking of cultivars with respect to coleoptile length. The coleoptiles of Cook and Oxley were significantly longer when seed was field-ripened rather than glasshouse ripened, while those of Banks, Bass and Kite were similar in length under both ripening environments.

scholarly journals Effect of temperature on predation by Tasmanian lacewing larvae

2001 ◽  
Vol 54 ◽  
pp. 244-247 ◽  
Author(s):  
S.S. Islam ◽  
R.B. Chapman
Keyword(s):  
Larval Development ◽  
Laboratory Study ◽  
Consumption Rate ◽  
Effect Of Temperature ◽  
Fluctuating Temperature ◽  
Cabbage Aphid ◽  
Larval Behaviour ◽  
Temperature Regimes ◽  
Consumption Rates ◽  
Constant And Fluctuating Temperature

A laboratory study investigated the predation and development rates of Tasmanian lacewing larvae (Micromus tasmaniae) under constant and fluctuating temperature regimes Larval development and consumption of second instar cabbage aphid (Brevicoryne brassicae) increased linearly with constant temperatures between 1030C Under fluctuating daily temperatures (1025C) development and consumption rates were equivalent to those found at a constant 25C Larvae consumed more aphids during later instars and a maximum consumption rate of approximately 10 aphids per day was recorded Some aspects of larval behaviour are described

scholarly journals Short term fluctuating temperature alleviates Daphnia stoichiometric constraints

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Esteban Balseiro ◽  
Cecilia Laspoumaderes ◽  
Facundo Smufer ◽  
Laura Wolinski ◽  
Beatriz Modenutti
Keyword(s):  
Nutrient Limitation ◽  
Temperature Fluctuation ◽  
Diel Vertical Migration ◽  
Temperature Treatment ◽  
Short Term ◽  
Fluctuating Temperature ◽  
Rna Content ◽  
Temperature Regimes ◽  
Lake Temperature ◽  
The Mean

AbstractIn this study, we analysed how short term temperature fluctuation interacts with nutrient limitation in the vertical migrating Daphnia commutata. We hypothesize that short term (daily) temperature fluctuation will alleviate nutrient limitation. We carried out experiments analysing growth rates, phosphorus and RNA content of D. commutate grown under four different temperature regimes and two P-limited conditions. Our experiments showed that individuals grown under fluctuating temperature grew more than at the mean temperature. We estimated the expected sizes for the 15 °C treatment based on the Q10 and for the fluctuating temperature treatment. These expected sizes for both treatments resulted well below the observed ones. The P and RNA content of individuals grown at 10 °C were significantly higher than those at 20 °C, and when individuals grown at 10 °C were translocated to 20 °C they exerted an increased growth rate. Our results suggest that, under a regime of diel vertical migration, the temperature alternation would allow migrating organisms to alleviate the effect of severe nutrient limitation maintaining population growth. Under a scenario of global warming, where epilimnetic temperatures will increase, lake temperature will interact with nutrient limitation for consumers, but, organisms may be able to face these changes if they can still regularly move from a cold hypolimnion to a warmer epilimnion.

Effect of constant and fluctuating temperature on daily melatonin production by eyecups from Rana perezi

1997 ◽  
Vol 167 (3) ◽  
pp. 221-228 ◽  
Author(s):  
A. I. Valenciano ◽  
M. Alonso-Bedate ◽  
M. J. Delgado ◽  
A. L. Alonso-G�mez
Keyword(s):  
Fluctuating Temperature ◽  
Melatonin Production ◽  
Constant And Fluctuating Temperature ◽  
Rana Perezi

scholarly journals Assessing the role of two populations of Aedes japonicus japonicus for Zika virus transmission under a constant and a fluctuating temperature regime

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Uros Glavinic ◽  
Jasmin Varga ◽  
Anca Ioana Paslaru ◽  
Jeannine Hauri ◽  
Paul Torgerson ◽  
...  
Keyword(s):  
Constant Temperature ◽  
Temperature Regime ◽  
Zika Virus ◽  
Incubation Temperature ◽  
Transmission Rate ◽  
Control Measures ◽  
Fluctuating Temperature ◽  
Laboratory Conditions ◽  
Temperature Regimes ◽  
Two Populations

Abstract Background Since the huge epidemic of Zika virus (ZIKV) in Brazil in 2015, questions were raised to understand which mosquito species could transmit the virus. Aedes aegypti has been described as the main vector. However, other Aedes species (e.g. Ae. albopictus and Ae. japonicus) proven to be competent for other flaviviruses (e.g. West Nile, dengue and yellow fever), have been described as potential vectors for ZIKV under laboratory conditions. One of these, the Asian bush mosquito, Ae. japonicus, is widely distributed with high abundances in central-western Europe. In the present study, infection, dissemination and transmission rates of ZIKV (Dak84 strain) in two populations of Ae. japonicus from Switzerland (Zürich) and France (Steinbach, Haut-Rhin) were investigated under constant (27 °C) and fluctuating (14–27 °C, mean 23 °C) temperature regimes. Results The two populations were each able to transmit ZIKV under both temperature regimes. Infectious virus particles were detected in the saliva of females from both populations, regardless of the incubation temperature regime, from 7 days post-exposure to infectious rabbit blood. The highest amount of plaque forming units (PFU) (400/ml) were recorded 14 days post-oral infection in the Swiss population incubated at a constant temperature. No difference in terms of infection, dissemination and transmission rate were found between mosquito populations. Temperature had no effect on infection rate but the fluctuating temperature regime resulted in higher dissemination rates compared to constant temperature, regardless of the population. Finally, transmission efficiency ranged between 7–23% and 7–10% for the constant temperature and 0–10% and 3–27% under fluctuating temperatures for the Swiss and the French populations, respectively. Conclusions To the best of our knowledge, this is the first study confirming vector competence for ZIKV of Ae. japonicus originating from Switzerland and France at realistic summer temperatures under laboratory conditions. Considering the continuous spread of this species in the northern part of Europe and its adaptation at cooler temperatures, preventative control measures should be adopted to prevent possible ZIKV epidemics.

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