Subtitle:

Acta Ornithologica, vol. 39, no. 2 ; Zmienność grubości blaszki okalającej zewnętrznej w kościach kończyn ptaków ; Limb bone outer layer variation

Contributor:

Museum and Institute of Zoology, Polish Academy of Sciences

Publisher:

Museum & Institute of Zoology

Place of publishing:

Warszawa

Description:

Bibliogr. p. 140 ; P. [137]-140 : ill. ; 27 cm ; Abstarct in Polish

Type of object:

Journal/Article

Abstract:

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.

Relation:

Acta Ornithologica

Volume:

39

Issue:

2

Start page:

137

End page:

140

Detailed Resource Type:

Journal

Format:

text/xml

Resource Identifier:

oai:rcin.org.pl:55519

Source:

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

Language:

eng

Rights:

Rights Reserved - Free Access

Terms of use:

Copyright-protected material. May be used within the limits of statutory user freedoms

Digitizing institution:

Museum and Institute of Zoology of the Polish Academy of Sciences

Original in:

Library of the Museum and Institute of Zoology of the Polish Academy of Sciences

Access:

Open