scholarly journals The Relationship of Egg Shell Color to Hatchability in Some Brown Egg Laying Breeds

1947 ◽  
Vol 26 (4) ◽  
pp. 381-388 ◽  
Author(s):  
George F. Godfrey
Keyword(s):  
Egg Laying ◽  
Shell Color ◽  
Egg Shell ◽  
Relationship Of ◽  
The Relationship

scholarly journals The Relationship of Egg Shell Color to Hatchability in New Hampshires

1949 ◽  
Vol 28 (4) ◽  
pp. 577-580 ◽  
Author(s):  
E.M. Funk ◽  
James F. Forward
Keyword(s):  
Shell Color ◽  
Egg Shell ◽  
Relationship Of ◽  
The Relationship

MORPHOLOGY OF THE FEMALE TERMINALIA IN LEPIDOPTERA, AND ITS TAXONOMIC SIGNIFICANCE

1972 ◽  
Vol 104 (7) ◽  
pp. 1055-1071 ◽  
Author(s):  
Akira Mutuura
Keyword(s):  
Morphological Characters ◽  
Egg Laying ◽  
Food Plants ◽  
Taxonomic Significance ◽  
Genealogical Tree ◽  
Genital Opening ◽  
Phylogenetic Classification ◽  
Relationship Of ◽  
The Relationship

AbstractIn the phylogenetic classification of the Lepidoptera, the position of the genital opening and its modifications help to clarify the relationship of the Zeugloptera to the lepidopterous suborders. Three different systems of the suborder classification of the Lepidoptera, into Homoneura and Heteroneura (Tillyard, Imms, etc.), Monotrysia and Ditrysia (Borner), and Dacnonypha, Monotrysia, and Ditrysia (Hinton), are not supported by evidence obtained in the study of the female genitalia.The development of the female terminalia is closely associated with the mode of oviposition. Several types of female terminalia are found in the primitive Lepidoptera (Hepialidae, Neopseustidae, Tischeriidae, Lyonetiidae, Agathiphagidae, Tineidae, Nepticulidae, and Eriocraniidae). They are divided into four categories: hepialid type — the eggs are dropped randomly; typical lepidopterous type — the eggs are laid on the surface of food plants; eriocraniid type — the eggs are laid inside the food plants; tineid type — the eggs are laid in crevices of food. Each of the types is derivable from the types occurring in Neopseustidae, Tischeriidae, Agathiphagidae, and Eriocraniidae, respectively. These types are still far removed from the type of female terminalia in Micropterygidae of the Zeugloptera.The modes of egg-laying as well as the morphological characters of the female genitalia must be taken into consideration in suborder classification of the Lepidoptera.A genealogical tree based on the female terminalia suggests four main branches: hepialid branch — includes Neopseustidae and Prototheoridae; typical lepidopterous branch — includes all Ditrysia and Nepticulidae; tineid branch — includes only Tineidae; eriocraniid branch — includes Incurvariidae, Prodoxidae, Adelidae, and Heliozelidae.

The Effect of Barometric Pressure Upon Oviposition of the Imported Cabbageworm, Pieris rapae (L.)

1949 ◽  
Vol 81 (5) ◽  
pp. 132-132 ◽  
Author(s):  
W. P. Stephen ◽  
R. D. Bird
Keyword(s):  
Pieris Rapae ◽  
Weather Conditions ◽  
Barometric Pressure ◽  
Egg Laying ◽  
Vegetable Gardens ◽  
Insect Activity ◽  
Relationship Of ◽  
The Relationship

It is a well known fact that the flight of moths and some other insects is affected by barometric pressure, but it is not well known how this phenomenon affects other insect activity. In a study of the ecology of insects in vegetable gardens at Brandon, Man., in 1948, the relationship of barometric pressure to insect activity was recorded.It was noted in the field that the imported cabbageworm adults behaved differently under varying weather conditions. During warm, clear days they did little but move about freely and feed, but on days that were overcast, particularly preceding rain, they became active about the plants and appeared to be engaged mainly in egg laying.

scholarly journals The Relationship of Weight and Ovarian Development in Bombus terrestris L. Workers under Different Social Conditions

2016 ◽  
Vol 60 (2) ◽  
pp. 51-58
Author(s):  
Ayhan Gosterit ◽  
Ozgur Koskan ◽  
Fehmi Gurel
Keyword(s):  
Ovarian Development ◽  
Bombus Terrestris ◽  
Egg Laying ◽  
Social Conditions ◽  
Starting Time ◽  
Significant Difference ◽  
Relationship Of ◽  
The Relationship ◽  
Egg Laying Behaviour ◽  
Group 1

Abstract Egg-laying behaviour of bumblebee workers is highly flexible and influenced by the bees’ social status and social environment. In this study, the dependence of the starting time of ovarian development in Bombus terrestris workers was determined under four different social conditions. The purpose was to test the effect of group stimulation and the presence of a queen on ovarian development. The relationship between weight and the commencement of ovarian development in workers was also investigated. We created four test groups: (1) 8 callow workers with a queen, (2) 8 callow workers without a queen, (3) 1 callow worker with a queen, and (4) 1 callow worker without a queen. Mated and hibernated (freshly awoken) B. terrestris queens made up Group 1 and 3. There was no significant difference between the starting times of ovarian development in the experimental groups composed of 8 callow workers in queenright (9.81 ± 2.44 days) and queenless (9.53 ± 2.53 days) conditions. However, ovaries of workers confined singly with a queen started to develop significantly earlier (11.77 ± 3.30 days) than workers confined singly without a queen (14.70 ± 3.56 days). The observations indicate that the presence of a queen does not inhibit the ovarian development of workers. The Point-Biserial Correlation Coefficient between the starting of ovarian development in workers and their weight was −0.013. However, there was a positive correlation between the weight and the ovarian developmental status of workers in groups containing 8 workers.

scholarly journals The Relationship of Egg Shell Weight to Cracked Eggs

1965 ◽  
Vol 44 (6) ◽  
pp. 1513-1518 ◽  
Author(s):  
E.H. McNally
Keyword(s):  
Shell Weight ◽  
Egg Shell ◽  
Relationship Of ◽  
The Relationship

scholarly journals The Relationship between Egg Shell Color and Incidence of Colored Meat Spots

1950 ◽  
Vol 29 (2) ◽  
pp. 244-247 ◽  
Author(s):  
F.P. Jeffrey ◽  
C.E. Walker
Keyword(s):  
Shell Color ◽  
Egg Shell ◽  
The Relationship
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