Birds of Indian Subcontinent

Der embryonale Sauerstoffverbrauch des Buntspechts ( Dendrocopos major ): Einfluß von Entwicklungsmodus und Bebrütungszeit

Publication Type:Journal Article
Year of Publication:1994
Authors:Berger, B, Föger, M, Büchele, S, Dallinger, R
Journal:Journal of Ornithology
Date Published:1994
ISBN Number:2193-7192
Keywords:Dendrocopos, Dendrocopos major, Picidae, Picoides major
Abstract:Oxygen consumption of two eggs of the Great Spotted Woodpecker was measured with a two-channel oxygen analyzer using an open flow system. The embryogeny of oxygen consumption nearly follows an exponential equation with the exception of a 7-hour plateau phase on day 9 of incubation. During this period the embryos consume ca. 4 ml O 2 × min -1 . For a given fresh egg mass the eggs of woodpeckers have unusually short incubation periods (10 days measured vs. 17 days expected). Thus a comparison of the embryonic metabolism with that of species having long incubation periods but similar egg sizes shows the influence of a fast embryonic development on avian enbryonic energetics. The total embryonic metabolism of the Great Spotted Woodpecker amounts to 0.9 kJx g -1 fresh egg mass which is half as much as the value for most other birds (ca. 2 kJ × g -1 ).
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith