lnu.sePublications
Change search
Link to record
Permanent link

Direct link
BETA
Österström, Ola
Publications (7 of 7) Show all publications
Österström, O., Holm, L. & Lilja, C. (2013). Calcium mobilization from the avian eggshell during embryonic development. Animal Biology, 63(1), 33-46
Open this publication in new window or tab >>Calcium mobilization from the avian eggshell during embryonic development
2013 (English)In: Animal Biology, ISSN 1570-7555, E-ISSN 1570-7563, Vol. 63, no 1, p. 33-46Article in journal (Refereed) Published
Abstract [en]

The avian eggshell acts as the major source of calcium for embryogenesis in bird. Using scanning electron microscopy, the inner eggshell surface was analysed before and after embryonic development and its accompanying calcium removal. This was done in eggs from two bird species with different growth rates and modes of development, the precocial Japanese quail Coturnix japonica and the altricial starling Sturnus vulgaris. Next, enzyme histochemistry was used to localize carbonic anhydrase in the extra-embryonic chorioallantoic membrane to provide support for the hypothesis that calcium may be released from the eggshell by means of acidification through the action of carbonic anhydrase. However, neither in the precocial quail nor in the altricial starling could any staining for carbonic anhydrase be detected. These results lead us to the conclusion that the role of carbonic anhydrase in embryonic calcium mobilization from the avian eggshell remains unclear.

Keywords
Bird, precocial, altricial, mammillary tips, chorioallantoic membrane, carbonic anhydrase
National Category
Biological Sciences
Research subject
Natural Science, Cell and Organism Biology
Identifiers
urn:nbn:se:lnu:diva-25225 (URN)10.1163/15707563-00002392 (DOI)000315750800003 ()2-s2.0-84874915350 (Scopus ID)
Available from: 2013-04-10 Created: 2013-04-05 Last updated: 2017-12-06Bibliographically approved
Österström, O. & Lilja, C. (2012). Evolution of avian eggshell structure.. Journal of morphology (1931. Print), 273(3), 241-247
Open this publication in new window or tab >>Evolution of avian eggshell structure.
2012 (English)In: Journal of morphology (1931. Print), ISSN 0362-2525, E-ISSN 1097-4687, Vol. 273, no 3, p. 241-247Article in journal (Refereed) Published
Abstract [en]

Data are presented suggesting that birds have evolved eggs with shells containing different structures (numbers of mammillae per unit of inner eggshell surface area, i.e., mammillary densities) to cope up with different calcium requirements imposed by different growth rates and modes of development. Precocial bird species grow slowly, but have high mammillary density, while altricial bird species grow rapidly, but have low mammillary density. These results suggest an adaptation associated with growth rate and mode of development and show, moreover, that the mammillary layer is indicative of the breeding biology of the bird.

National Category
Biological Sciences
Research subject
Natural Science, Cell and Organism Biology
Identifiers
urn:nbn:se:lnu:diva-22850 (URN)10.1002/jmor.11018 (DOI)21987469 (PubMedID)2-s2.0-84856480015 (Scopus ID)
Available from: 2012-12-12 Created: 2012-12-12 Last updated: 2017-12-07Bibliographically approved
Österström, O. & Lilja, C. (2010). Carbonic anhydrase and calcium mobilization from the avian eggshell during embryonic development. In: 25th International Ornithological Congress 22 to 28 August 2010 ISBN 978-85-911618-0-5 Campos do Jordão, SP, BRAZIL: Abstracts of the 25 International Ornithological Congress. Paper presented at 25th IOC 2010, Campos do Jordão, SP, Brazil. (pp. 683).
Open this publication in new window or tab >>Carbonic anhydrase and calcium mobilization from the avian eggshell during embryonic development
2010 (English)In: 25th International Ornithological Congress 22 to 28 August 2010 ISBN 978-85-911618-0-5 Campos do Jordão, SP, BRAZIL: Abstracts of the 25 International Ornithological Congress, 2010, p. 683-Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

The avian eggshell contributes to successful embryogenesis by acting as the major source of calcium. It has been suggested, moreover, that birds have evolved eggshells with different structures adapted to cope with different calcium requirements imposed by different growth rates and modes of development. Yet the mechanism of calcium removal from the avian eggshell by the embryo remains unknown. Using enzyme histochemistry, we here test an old hypothesis stating that calcium is released from the eggshell by means of acidification by the action of carbonic anhydrase (CA) in the extra-embryonic chorio-allantoic membrane (CAM). This enzyme catalyses the reversible reaction CO2+H2O <-> H+HCO3 and is known to take significant part in acid-base regulation in the body. We examined CAMs from two bird species, Coturnix japonica and Sturnus vulgaris, with very different growth rates and modes of development. The CAMs were examined for CA activity at the later stages of embryonic development. However, in all CAMs examined, staining for CA was absent, leading us to the conclusion that existing hypothesis about a link between CA and embryonic calcium mobilization from the avian eggshell is at present premature.

National Category
Biological Sciences
Research subject
Natural Science, Cell and Organism Biology
Identifiers
urn:nbn:se:lnu:diva-7968 (URN)978-85-911618-0-5 (ISBN)
Conference
25th IOC 2010, Campos do Jordão, SP, Brazil.
Available from: 2010-08-31 Created: 2010-08-31 Last updated: 2018-05-31Bibliographically approved
Österström, O. & Lilja, C. (2008). Eggshell structure, mode of development and growth rate in birds.. Zoology (Jena), 111(6), 494-502
Open this publication in new window or tab >>Eggshell structure, mode of development and growth rate in birds.
2008 (English)In: Zoology (Jena), ISSN 0944-2006, E-ISSN 1873-2720, Vol. 111, no 6, p. 494-502Article in journal (Refereed) Published
Keywords
Precocial birds; Altricial birds; Embryogenesis; Calcium source; Mammillary layer
National Category
Natural Sciences
Research subject
Natural Science, Cell and Organism Biology; Natural Science, Evolutionary Biology
Identifiers
urn:nbn:se:lnu:diva-1606 (URN)10.1016/j.zool.2007.11.005 (DOI)
Available from: 2010-04-06 Created: 2010-04-06 Last updated: 2017-12-12Bibliographically approved
Österström, O. & Lilja, C. (2007). Changes in eggshell structure and function during avian evolution. In: Journal of Morphology 246 (12).
Open this publication in new window or tab >>Changes in eggshell structure and function during avian evolution
2007 (English)In: Journal of Morphology 246 (12), 2007Conference paper, Published paper (Refereed)
Research subject
Natural Science, Cell and Organism Biology; Natural Science, Evolutionary Biology
Identifiers
urn:nbn:se:lnu:diva-4737 (URN)
Note
Nummer: Available from: 2010-04-28 Created: 2010-04-28 Last updated: 2011-10-14Bibliographically approved
Blom, J., Österström, O. & Lilja, C. (2006). Embryonic stages in the development of the altricial Fieldfare. In: Journal of Orhithology. 147 (5). 139.
Open this publication in new window or tab >>Embryonic stages in the development of the altricial Fieldfare
2006 (English)In: Journal of Orhithology. 147 (5). 139, 2006Conference paper, Published paper (Refereed)
Research subject
Natural Science, Cell and Organism Biology; Natural Science, Evolutionary Biology
Identifiers
urn:nbn:se:lnu:diva-4733 (URN)
Note
Nummer: Available from: 2010-04-28 Created: 2010-04-28 Last updated: 2011-10-05Bibliographically approved
Österström, O. & Lilja, C. (2006). Is the shell of an egg adapted to support different rates of calcium removal by developing embryos. In: Journal of Ornithology 147 (5).
Open this publication in new window or tab >>Is the shell of an egg adapted to support different rates of calcium removal by developing embryos
2006 (English)In: Journal of Ornithology 147 (5), 2006Conference paper, Published paper (Refereed)
Research subject
Natural Science, Cell and Organism Biology; Natural Science, Evolutionary Biology
Identifiers
urn:nbn:se:lnu:diva-4735 (URN)
Note
Nummer: Available from: 2010-04-28 Created: 2010-04-28 Last updated: 2011-10-05Bibliographically approved
Organisations

Search in DiVA

Show all publications