scholarly journals Effect of temperature in the laboratory studies on growth, egg development and first parturition of five species of Cladocera.

1985 ◽  
Vol 46 (3) ◽  
pp. 185-191 ◽  
Author(s):  
Takayuki HANAZATO ◽  
Masayuki YASUNO
Keyword(s):  
Effect Of Temperature ◽  
Laboratory Studies ◽  
Egg Development

PREDICTING THE TIME OF HATCH OF THE STRAWBERRY APHID, CHAETOSIPHON FRAGAEFOLII (HOMOPTERA: APHIDIDAE)

1984 ◽  
Vol 116 (8) ◽  
pp. 1131-1135 ◽  
Author(s):  
B.D. Frazer ◽  
D. A. Raworth
Keyword(s):  
Constant Temperature ◽  
Accurate Method ◽  
Effect Of Temperature ◽  
Controlled Environment ◽  
Egg Development ◽  
Thermal Threshold ◽  
Threshold Of Development ◽  
Time Of Collection

AbstractThe rate of hatch of overwintered eggs of the strawberry aphid, Chaetosiphon fragaefolii (Cockerell), at five temperatures in controlled environment chambers was used to determine the thermal threshold of development. Samples of eggs were taken from two field locations several times before hatch. These samples were subdivided and placed into two or three different constant temperature chambers. The day-degree requirements for hatching from the time of collection were estimated. These estimates corresponded to the number of day-degrees actually accumulated in the field between the time of egg collection and the time of hatching.This method of simulating the effect of temperature on egg development was an accurate method of predicting the time of hatch in the field at least 3 weeks prior to the observed time.

Temperature: collection of data and its analysis for the interpretation of plant growth and distribution

1969 ◽  
Vol 47 (1) ◽  
pp. 167-173 ◽  
Author(s):  
B. D. Cleary ◽  
R. H. Waring
Keyword(s):  
Pseudotsuga Menziesii ◽  
Growing Season ◽  
Temperature Data ◽  
Plant Distribution ◽  
Effect Of Temperature ◽  
Mechanical Forces ◽  
Laboratory Studies ◽  
Soil Temperatures ◽  
Controlled Potential ◽  
Temperature Interactions

Suggestions for more meaningful collection, processing, and interpretation of temperature data are offered. Our suggestions are based upon characteristics of the organism under study. Research on plant–temperature interactions is reviewed and another approach is illustrated.Temperature data, collected near shoots and roots of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings in different field situations, were assembled from computer-processed temperature traces. From laboratory studies in which day and night air and soil temperatures were controlled, potential seedling growth each day during a growing season was assessed. Then, by summation, a physiological index, expressed in equivalent units, was calculated to relate the possible effect of the field temperatures to plant distribution. This index was used to interpret the effect of temperature on the distribution of vegetation and patterns of leaf initiation in the field. The importance of interactions with the other environmental factors of moisture, chemicals, light, and mechanical forces is mentioned.

Factors Influencing Oviposition, and the Effect of Temperature on Development and Survival of Enoclerus lecontei (Wolcott) Eggs

1966 ◽  
Vol 98 (6) ◽  
pp. 579-585 ◽  
Author(s):  
Alan A. Berryman
Keyword(s):  
Food Consumption ◽  
Bark Beetles ◽  
Effect Of Temperature ◽  
Limiting Factor ◽  
Regression Equations ◽  
Optimal Conditions ◽  
Egg Development ◽  
Independent Variables ◽  
Factors Influencing ◽  
Enoclerus Lecontei

AbstractThe factors influencing oviposition and feeding of Enoclerus lecontei, and the effect of temperature on egg development and survival, were studied in the laboratory.When food was not a limiting factor, the total number of eggs laid, and the total number of bark beetles consumed by clerid pairs during their lives was strongly influenced by longevity of the female and to a lesser extent by female “vigor”. Female “vigor” and longevity were not necessarily coincident. The rate of oviposition and the rate of food consumption are mainly influenced by the “vigor” of the female clerid.The effect of suboptimal food on oviposition was determined. Regression equations are given for estimating the number of eggs laid utilizing three measures of food supply, number of bark beetles supplied, their weight, and number eaten. The independent variables may be used separately or combined as a multiple regression.Time for egg development varied from 5 days at 35 °C. to 28 days at 15 °C. Optimal conditions for development and survival were between 20° and 25 °C. Eggs can withstand cold storage (7° to 9 °C.) for 10 days before survival is impaired. Thereafter, mortality increases logarithmically until the 100 percentile is reached at about 43 days.

Effect of temperature on the egg viability and duration of egg development ofParahypopta caestrum

2004 ◽  
Vol 32 (4) ◽  
pp. 367-369 ◽  
Author(s):  
G. Salpiggidis ◽  
E. Navrozidis ◽  
M. J. Copland
Keyword(s):  
Effect Of Temperature ◽  
Egg Viability ◽  
Egg Development
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