Advanced search
Advanced search
Advanced search
Advanced search
Advanced search
Ponton, Fleur (1980– ) ; Elżanowski Andrzej ; Castanet Jacques ; Chinsamy Anusuya ; Emmaanuel de Margerie ; Armand de Ricqlès ; Cubo Jorge ; Polska Akademia Nauk. Muzeum i Instytut Zoologii.
Acta Ornithologica, vol. 39, no. 2 ; Zmienność grubości blaszki okalającej zewnętrznej w kościach kończyn ptaków ; Limb bone outer layer variation
Museum and Institute of Zoology, Polish Academy of Sciences
Bibliogr. p. 140 ; P. [137]-140 : ill. ; 27 cm ; Abstarct in Polish
The core of the limb bone cortex of mammals and birds is made of rapidly deposited, fibro-lamellar bone tissue (also present in non-avian theropods), which is usually surrounded by an avascular outer circumferential layer (OCL) of slowly deposited parallel-fibered bone. We present the first comparative allometric study of the relative OCL thickness (expressed as a fraction of the diaphyseal radius) in modern birds. Body size explains 79% of the OCL variation in thickness, which is inversely correlated with size, that is, shows negative allometry (slope -0.799). This may explain the apparent absence of OCL in the ratites. Since the OCL is deposited at the end of growth, we propose that its relative thickness probably correlates with the amount of slow, residual growth, which our results suggest to be on the average larger in small birds.
MiIZ PAN, call no. patrz sygn. czas. P.257-39-2 ; MiIZ PAN, call no. patrz sygn. czas. P.4568-39-2 ; click here to follow the link
Copyright-protected material. May be used within the limits of statutory user freedoms
Museum and Institute of Zoology of the Polish Academy of Sciences
Library of the Museum and Institute of Zoology of the Polish Academy of Sciences
Oct 2, 2020
Jul 28, 2015
43
https://rcin.org.pl./publication/49783
Elżanowski, Andrzej (1950– ) Paśko, Łukasz
Rydzewski, Władysław (1911–1980)
Rząśnicki, Adolf (1884–1953)
Bojanus, Ludwik Henryk (1776–1827) Roskosz, Tadeusz (1927– ) Empel, Wojciech (1932– ) Łukasik, Czesław
Aarde, R. J.
Brooks, J. E. Htun, P. T.
Groves, C. P. Napier, J. R.
Fiennes, R. N. T. Graham-Jones, O.