Quantifying the maculation of avian eggs using eggshell geometry

Ibis ◽  
2019 ◽  
Vol 161 (3) ◽  
pp. 686-693
Author(s):  
Thomas W. Pike
Keyword(s):  
Avian Eggs

Measuring Steroid Hormones in Avian Eggs

2005 ◽  
Vol 1046 (1) ◽  
pp. 181-192 ◽  
Author(s):  
N.KOLAUS Von ENGELHARDT ◽  
TON G. G. GROOTHUIS
Keyword(s):  
Steroid Hormones ◽  
Avian Eggs

scholarly journals The optimal shape of avian eggs

1997 ◽  
Vol 11 (5) ◽  
pp. 656-662 ◽  
Author(s):  
Z. BARTA ◽  
T. SZEKELY
Keyword(s):  
Optimal Shape ◽  
Avian Eggs

The acoustocardiogram: a noninvasive method for measuring heart rate of avian embryos in ovo

1990 ◽  
Vol 69 (4) ◽  
pp. 1546-1548 ◽  
Author(s):  
H. Rahn ◽  
S. A. Poturalski ◽  
C. V. Paganelli
Keyword(s):  
Heart Rate ◽  
Low Cost ◽  
Noninvasive Method ◽  
In Ovo ◽  
Avian Embryos ◽  
Condenser Microphone ◽  
Avian Eggs

A method is presented for measuring the heart rate of avian eggs noninvasively during the last half of incubation. The technique involves briefly placing an egg in tightly sealed vessel containing an inexpensive condenser microphone. The amplified output of the microphone, termed the acoustocardiogram (ACG), is nearly sinusoidal in shape and synchronous with the electrocardiogram. The ACG can also be obtained by mounting the microphone directly on the shell with Plasticine. The method offers advantages over previously described techniques in simplicity, low cost, and noninvasiveness.

scholarly journals The Gross Energy of Avian Eggs

1979 ◽  
Vol 58 (2) ◽  
pp. 404-409 ◽  
Author(s):  
I.R. SIBBALD
Keyword(s):  
Gross Energy ◽  
Avian Eggs

Maternal Hormones in Avian Eggs

2011 ◽  
pp. 91-127 ◽  
Author(s):  
Nikolaus von Engelhardt ◽  
Ton G.G. Groothuis
Keyword(s):  
Avian Eggs ◽  
Maternal Hormones

scholarly journals A 2-D imaging-assisted geometrical transformation method for non-destructive evaluation of the volume and surface area of avian eggs

Food Control ◽  
2020 ◽  
Vol 112 ◽  
pp. 107112 ◽  
Author(s):  
Valeriy G. Narushin ◽  
Gang Lu ◽  
James Cugley ◽  
Michael N. Romanov ◽  
Darren K. Griffin
Keyword(s):  
Surface Area ◽  
Transformation Method ◽  
Non Destructive Evaluation ◽  
Geometrical Transformation ◽  
Avian Eggs ◽  
Non Destructive

scholarly journals Characterizing the timing of yolk testosterone metabolism and the effects of etiocholanolone on development in avian eggs

2020 ◽  
Vol 223 (4) ◽  
pp. jeb210427
Author(s):  
Nicole A. Campbell ◽  
Rachel Angles ◽  
Rachel M. Bowden ◽  
Joseph M. Casto ◽  
Ryan T. Paitz
Keyword(s):  
Testosterone Metabolism ◽  
Avian Eggs ◽  
Yolk Testosterone

CANDLING AND SIGHTING TECHNIQUES USED IN LASER INVESTIGATIONS OF THE EUROPEAN PINE SAWFLY, NEODIPRION SERTIFER (HYMENOPTERA: DIPRIONIDAE)

1967 ◽  
Vol 99 (6) ◽  
pp. 670-672 ◽  
Author(s):  
Ronald W. Kobylnyk
Keyword(s):  
Laser Treatment ◽  
Light Transmission ◽  
Transmitted Light ◽  
Neodiprion Sertifer ◽  
Accurate Assessment ◽  
Pine Sawfly ◽  
Avian Eggs ◽  
Egg Shell ◽  
European Pine Sawfly ◽  
Zoology Department

Laser treatment of larval and pupal stages within cocoons of Neodiprion sertifer (Geoff.) requires an accurate assessment of viability and the antero-posterior alignment of the cocoon content. The use of the candling technique to assess qualitative features of avian eggs depends on the translucency of the egg shell and the differences in light transmission by other elements within it (Romanoff and Romanoff 1949). Transmitted-light methods have been employed for insects within cocoons by Cushman (1913) and Hanna (1935). A type of candling technique different from previous methods and which was developed in the Zoology Department, University of Guelph, enables N. sertifer cocoon content to be ascertained and is herein described.

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