Subtitle:

Acta Ornithologica, vol. 34, no. 2 ; Fenotypowa dostosowalność żołądka mięśniowego ptaków

Contributor:

Polska Akademia Nauk. Muzeum i Instytut Zoologii ; Meeting of the European Ornithologists' Union (2 ; 1999 ; Gdańsk)

Publisher:

Muzeum i Instytut Zoologii PAN

Place of publishing:

Warszawa

Description:

Referat wygłoszony na Second Meeting of the European Ornithologists' Union ; Bibliogr. p. 153 ; P. [149]-153 : ill. ; 27 cm ; Abstract in Polish

Type of object:

Journal/Article

Abstract:

Evolutionary biology presumes that organ capacities match their natural loads. Therefore, organ systems are expected to show a reversible, repeatable and rapid phenotypic response to fluctuating conditions that is directional and scaled. In this study, phenotypic responses of the gizzard of adult Japanese quails Coturnix japonica to experimental mismatches of load and capacity were tested by a series of diet-switching experiments (involving an increased content of non-digestable fibre, NDF, in the diet). The results of all experiments were in accordance with the predictions made from the hypothesis that there is matching between loads and capacities: (1) the observed phenotypic responses are directional and scaled to the demands, i.e. increasing NDF elicits an increase in gizzard size. When the proportion of NDF in the diet was raised from 1% to 45%, the gizzard was more than twice as large as in the control group; (2) size responses were reversible, and reduced NDF was followed by a decrease of gizzard size; (3) phenotypic responses could be elicited repeatedly in three successive trials; (4) excess capacities were down-regulated and insufficient capacities were up-regulated; (5) the responses followed changes of loads with almost no time lag, with size changes measurable within 24 hours.

Relation:

Acta Ornithologica

Volume:

34

Issue:

2

Start page:

149

End page:

153

Detailed Resource Type:

Article

Format:

application/pdf

Resource Identifier:

oai:rcin.org.pl:45212

Source:

MiIZ PAN, call no. P.257, Vol. 34, No 2 ; MiIZ PAN, call no. P.4568, Vol. 34, No 2 ; click here to follow the link

Language:

eng ; pol

Rights:

Rights Reserved - Restricted Access

Terms of use:

Copyright-protected material. Access only on terminals at the Museum and Institute of Zoology of the Polish Academy of Sciences, 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

Projects co-financed by:

Programme Innovative Economy, 2010-2014, Priority Axis 2. R&D infrastructure ; European Union. European Regional Development Fund

Access:

Closed