scholarly journals Effect of temperature on egg production in the common housefly

2020 ◽  
Vol 168 (6-7) ◽  
pp. 513-522 ◽  
Author(s):  
Ljubinka Francuski ◽  
Walter Jansen ◽  
Leo W. Beukeboom
Keyword(s):  
Egg Production ◽  
Effect Of Temperature ◽  
The Common

Egg production of Calanus finmarchicus : effect of temperature, food and season

1997 ◽  
Vol 127 (4) ◽  
pp. 609-620 ◽  
Author(s):  
H.-J. Hirche ◽  
U. Meyer ◽  
B. Niehoff
Keyword(s):  
Egg Production ◽  
Calanus Finmarchicus ◽  
Effect Of Temperature

scholarly journals Mineral Composition and Antioxidant Potential in the Common Poppy (Papaver rhoeas L.) Petal Infusions

2020 ◽  
Vol 199 (1) ◽  
pp. 371-381
Author(s):  
Janda Katarzyna ◽  
Jakubczyk Karolina ◽  
Kupnicka Patrycja ◽  
Bosiacki Mateusz ◽  
Gutowska Izabela
Keyword(s):  
Vitamin C ◽  
Mineral Content ◽  
Antioxidant Potential ◽  
Effect Of Temperature ◽  
Total Polyphenol ◽  
Spectrophotometric Methods ◽  
Inflammatory Conditions ◽  
Different Temperatures ◽  
The Common ◽  
Increasing Temperature

AbstractThe flowers of the common poppy are used for medicinal purposes, both internally and externally. They are reported to have antispasmodic and antitussive properties, to alleviate inflammatory conditions and soothe anxiety-related digestive problems. The aim of the study was to determine the antioxidant potential and the content of vitamin C, polyphenols, and minerals in infusions made from the petals of the common poppy at different temperatures. The infusions were made at various temperatures (25 °C, 70 °C, 80 °C, and 90 °C). The antioxidant potential and the content of polyphenols and vitamin C were determined by spectrophotometric methods. The mineral content was determined using the ICP-OES method. The total polyphenol content ranged from 135.2 to 137.24 ppm and that of vitamin C—from 15.47 to 15.78 mg/100 mL. The temperature of the water used to make the infusions did not appear to have a significant effect on these parameters. The temperature did, however, significantly affect the antioxidant potential of the infusions—the highest antioxidant activity (71.21% DPPH inhibition) was observed in the infusion prepared using water at 80 °C. The infusions included in the study contained a number of minerals. No significant effect of temperature was found for the content of K, Zn, Cu, Fe, and Ni in the infusions. On the other hand, the content of Ca in the infusions was significantly correlated with the increasing temperature of the water. It was concluded that poppy petal infusions may serve as a valuable dietary supplement, providing antioxidants and minerals required by the human body to function properly.

Effect of temperature and photoperiod on sexual maturation and spawning of the common carp

Aquaculture ◽  
1986 ◽  
Vol 51 (3-4) ◽  
pp. 277-288 ◽  
Author(s):  
Philip R. Davies ◽  
Isao Hanyu
Keyword(s):  
Common Carp ◽  
Sexual Maturation ◽  
Effect Of Temperature ◽  
The Common

Seasonal variation in the egg production of fowls: effect of temperature and change of day length

1957 ◽  
Vol 49 (4) ◽  
pp. 419-434 ◽  
Author(s):  
J. C. D. Hutchinson ◽  
W. W. Taylor
Keyword(s):  
Egg Production ◽  
Late Summer ◽  
Day Length ◽  
Phase Iii ◽  
Effect Of Temperature ◽  
Detectable Effect ◽  
Production Phase ◽  
Supplementary Lighting ◽  
Autumn And Winter ◽  
Phase Iv

1. Two groups of pullets were reared on a 12 and a 23½ hr. day length respectively and at an environmental temperature of 64–65° F. Two months after the first bird came into lay, the day length of the second group was reduced to 12 hr. over a period of about 8 weeks (phase I).2. Both groups came into production at the same time, but the group reared on a 23½ hr. day grew more rapidly.3. The reduction in day length caused moulting and low production for several months, whereas the group which had been reared in a 12 hr. day continued to lay steadily.4. Soon after the reduction of day length half of each group (subgroups B and D) was exposed to an artificial thermal autumn and winter, which had no detectable effect on production (phase II). After this the temperature was allowed to rise to 64–65° F.5. When the day length of the remaining birds (subgroups A and C), still kept at 64–65° F., was increased to 23½ hr., there was no significant increase in production (phase III).6. When their day length was then reduced to 12 hr., they moulted heavily and went out of production (phase IV).7. Simultaneously the day length of subgroups B and D was increased to 16J hr. (phase IV). This had no significant effect on production.8. The yield of the birds which had their day length reduced at the beginning of the experiment was twenty-three ovulations less than that of the others at the end of the artificial winter, and nineteen less at the end of the laying year. The laying year was concluded before phase IV. There was no difference in yield between the birds which had an artificial autumn and winter and those which lived in a warm environment.9. Data are given on the frequency distribution of the yield after a reduction in day length, over the remainder of the year, and also on the correlation between the yields in these two periods.10. The eggs of the group reared in a 23½ hr. day length tended to be larger than those of the other group in conformity with their larger body weight. Apart from this the various treatments had no effect on egg weight.11. There was no relation between the egg yields and the variations in absolute and relative humidity.12. In a subsidiary experiment it was found that, if the reduction in day length was completed a month before the birds began to lay, there was no significant effect on subsequent production.13. In the light of these experiments it seems that the essential cause of winter pause and the annual rest, in birds given supplementary lighting, is the decline in day length in late summer and autumn.

Diel variations in Centropages tenuiremis (Copepoda) feeding, spawning and its relationship with temperature

2012 ◽  
Vol 93 (3) ◽  
pp. 645-649 ◽  
Author(s):  
Lisheng Wu ◽  
Qiujing Gao ◽  
Guizhong Wang ◽  
Yusha Liu
Keyword(s):  
Egg Production ◽  
Seawater Temperature ◽  
Circular Statistics ◽  
Effect Of Temperature ◽  
Peak Time ◽  
Night Time ◽  
Xiamen Bay ◽  
Feeding Activities ◽  
Feeding Rhythms ◽  
Lag Times

Diel rhythms in feeding and spawning were investigated in Centropages tenuiremis from Xiamen Bay in March to May, 2006. Circular statistics were used to determine the peak time of spawning. The results showed that the feeding activities of females were stably higher at night-time, and there was a remarkable earlier shift in spawning peak time with warmer seawater. Thus, the lag times between peak times of gut pigment content and spawning were shortened with the increase of temperature. It suggested that there was a direct effect of feeding rhythms on egg production variations in copepods, and the seawater temperature would work on the converting time and then influence the spawning peak time. So the effect of temperature cannot be ignored in the investigation of the effects of feeding on egg production.

Temperature, Size and Egg Production in the Cabbage Butterfly, Pieris Rapae L.

1982 ◽  
Vol 30 (2) ◽  
pp. 223 ◽  
Author(s):  
RE Jones ◽  
JR Hart ◽  
GD Bull
Keyword(s):  
High Temperatures ◽  
Low Temperatures ◽  
Egg Production ◽  
Pieris Rapae ◽  
Effect Of Temperature ◽  
Pupal Weight ◽  
Larval Diet ◽  
Young Females ◽  
Rearing Conditions ◽  
High Degree

Larvae reared at low temperatures produce larger pupae and adults than those reared at high temperatures, and pupal weight is linearly related to lifetime egg production; mean egg production in a group reared at 29-3l�C may be twice that of another reared at 17.5-19�C. The number of eggs visible with a dissecting microscope in the ovaries of young females is not proportional to their lifetime production. Once size is taken into account, there is no additional effect of temperature or larval diet on total egg production. The timing of egg production throughout an adult's life is unaffected by its size or by the conditions in which it was reared. but there are marked differences between Australian and Canadian (Vancouver) individuals. The size of eggs is inversely correlated with both the age and the size of the mother. In any particular set of rearing conditions, males tend to be larger than females, and the sexes show an equal and high degree of variation in size.

Effect of increased egg production on egg composition in the Common Tern Sterna hirundo

Ibis ◽  
2008 ◽  
Vol 140 (4) ◽  
pp. 693-696 ◽  
Author(s):  
Vickie Heaney ◽  
Ruedi G. Nager ◽  
Pat Monaghan
Keyword(s):  
Egg Production ◽  
Common Tern ◽  
Sterna Hirundo ◽  
Egg Composition ◽  
The Common

scholarly journals The Effect of Temperature Synthesis on the Plate-Like Particle of Bi4Ti3O12 Obtained by Single Molten NaCl Salt

2021 ◽  
Vol 10 (1) ◽  
pp. 64-71
Author(s):  
Sheley Dea Marella ◽  
◽  
Nur Aini ◽  
Arie Hardian ◽  
Veinardi Suendo ◽  
...  
Keyword(s):  
Molten Salt ◽  
Synthesis Temperature ◽  
Sem Analysis ◽  
Molten Salt Synthesis ◽  
Effect Of Temperature ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Simple Method ◽  
Shaped Particle ◽  
The Common

Three-layer Aurivillius compound bismuth titanate (Bi4Ti3O12) is well known for having interesting properties such as ferroelectric and photocatalyst. Many researchers reported that the unique plate-like shaped particle affecting ferroelectric and photocatalyst properties. The molten salt synthesis is the common simple method to obtain that unique morphology. In this research, Bi4Ti3O12 was synthesized using single molten salt NaCl at various temperatures, which is 800, 850, 900, and 950 oC. X-Ray Diffraction data showed that all obtained Bi4Ti3O12 have a B2cb space group with no impurities detected. The Raman spectra shows the characteristic vibration modes of Bi4Ti3O12 at 62, 117, 228, 269, 332, 364, 536, 851 cm-1. The plate-like shaped particle was confirmed by SEM analysis. Based on SEM images, the size of the particle increased along with the synthesis temperature, which is due to the thermal effect on grain growth.

scholarly journals THE EFFECT OF TEMPERATURE AND PARENTAL AGE ON RECOMBINATION AND NONDISJUNCTION IN CAENORHABDITIS ELEGANS

Genetics ◽  
1979 ◽  
Vol 92 (2) ◽  
pp. 409-418 ◽  
Author(s):  
A M Rose ◽  
D L Baillie
Keyword(s):  
Recombination Event ◽  
Egg Production ◽  
Recombination Frequency ◽  
Temperature Shift ◽  
Effect Of Temperature ◽  
Temperature Sensitive ◽  
Parental Age ◽  
Linkage Groups ◽  
C Elegans ◽  
Chromosome Nondisjunction

ABSTRACT The effect of temperature and parental age on recombination frequency in C. elegans was studied between pairs of closely linked markers on linkage groups I and V. In the regions studied, recombination frequency vaned three-fold over the temperature range 13.5° to 26°. Temperature-shift experiments indicated that a temperature-sensitive recombination event occurs approximately 50 oocytes prior to fertilization. Recombination frequency was observed to decrease with maternal age. The greatest decrease was observed in the first 24 hours of egg production. The frequency of male progeny, a measure of X-chromosome nondisjunction was also studied. This frequency increased with elevated temperature and age of the parent.

scholarly journals Effect of Ambient Temperature on the Performance of Shaver Brown Hens in Hot Humid Environment

2019 ◽  
pp. 1-10
Author(s):  
A. O. Ani ◽  
M. O. Okpara
Keyword(s):  
Ambient Temperature ◽  
Egg Production ◽  
Shape Index ◽  
Metabolizable Energy ◽  
Effect Of Temperature ◽  
Crude Fibre ◽  
Egg Weight ◽  
Humid Environment ◽  
Egg Shape ◽  
Egg Shell

The effect of temperature on the performance of Shaver brown hens in the hot humid environment was investigated using seventy-five Shaver brown hens in their 14th week of lay. Each hen was housed in individual battery cage and fed daily with 125 g of commercial layers mash containing 16.5% crude protein, 2650 kcal/kg metabolizable energy, 4% crude fat, 6.5% crude fibre, 3.6% calcium and 0.4% phosphorus for 10 weeks. Water was supplied ad libitum to the birds. Eggs were collected daily and recorded for each hen. Data were collected on average daily feed intake(ADFI),  egg weight, eggshell weight, egg shell thickness, egg shape index, albumin height, yolk height, albumin index, yolk index, haugh unit and hen day egg production. Results showed that ADFI, hen day egg production, egg shape index, albumin height, yolk height, yolk index and Haugh units were significantly (P < 0.05) decreased with increase in ambient temperature. However, high ambient temperature did not have significant (P > 0.05) effect on egg weight, eggshell thickness and albumin index. Based on the results obtained in the study, it was concluded that ambient temperature had an effect on the performance of Shaver brown hens in the humid tropics.

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