REGISTRATION OF SEXUAL DIMORPHISM OF LINEAR AND ANGULAR PARAMETERS OF THE FINE STRUCTURE OF THE REMEX VANE OF PADOVANA CHICKENS
Abstract
Electron microscopic examination of the fine structure of the primary remiges in a male and a female of Padovana chicken revealed signs of sexual dimorphism by four morphometric parameters (elongation index, curvature index, the angle of displacement of the tip of the ventral ridge, the angle of curvature) in five topographic sites of the cross section of the ramus of the pennaceous barb. For this purpose, based on arithmetic means in the Python program using the NumPy library, two data arrays containing 20 elements for each sex were created. The difference found between the elements of the arrays of male and female showed that in 11 cases (55%) there is a dominance of the indicators of the male over the indicators of the female, while in 9 cases (45%) there is a dominance of the parameters of the female over the parameters of the male. No cases of sexual parity have been identified.
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References
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References
Scanes C.G. Poultry Science / C.G. Scanes, K.D. Christensen. – 5th ed. – Long Grove: Waveland Press, Inc., 2020
Lovich J.E. A review of techniques for quantifying sexual dimorphism / J.E. Lovich, J.W. Gibbons // Growth, Development and Aging. – 1992. – Vol. 56. – pp. 269–281
Rizzi C. Plumage colour in Padovana chicken breed: growth performance and carcass quality / C. Rizzi // Italian Journal of Animal Science. – 2018. – Vol. 17(3). – pp. 797–803. DOI: 10.1080/1828051X.2017.1413598
Rizzi C. Growth and slaughtering performance, carcase fleshiness and meat quality according to the plumage colour in Padovana male chickens slaughtered at 18 weeks of age / C. Rizzi // Italian Journal of Animal Science. – 2019. – Vol. 18(1). –pp. 450–459. DOI:10.10 80/1828051X.2018.1532823
Chernova O.F. Heterochrony as the basis for inter-and intraspecific diversity of skin in Vertebrates / O.F. Chernova, A.B. Kiladze // Biology Bulletin Reviews. – 2019. – Vol. 9(2). – pp. 174–189. DOI: 10.1134/S207908641902004X
Lucas A.M. Avian Anatomy Integument / A.M. Lucas, P.R. Stettenheim. – Washington: Publ. US Dept. Agricul., 1972
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