Naslov
Biominerals in embryos, pluteus and adult Antarctic sea urchins Sterechinus neumayeri

Autori
Medaković, Davorin ; Popović, Stanko ; Manahan, T., Donal

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Antarctic Biology in a Global Context

Urednik/ci
Huiskes, H., L., Ad ; Gieskes, W., C., Winfried ; Rozema, Jelte ; Schorno, M., L., Raymond ; Van der Vies, M., Saskia ; Wolf, J., Wim

Izdavač
Vrije Universiteit Amsterdam

Grad
Amsterdam

Godina
2003

Raspon stranica
140-143

ISBN
90-5782-079-X

Ključne riječi
Sterechinus neumayeri, sea urchin, pluteus larva, McMurdo, Antarctica, biomineralization

Sažetak
X-ray powder diffraction (XRD) was used to study the mineral composition of embryos, early pluteus and adult Antarctic sea urchins Sterechinus neumayeri. The contents of minerals were determined by quantitative X-ray phase analysis. The fraction of Mg in magnesium celcite was measured from the angular shifts of diffraction lines in relation to the angular pè ; osition of the same diffraction lines of pure calcite. It was found that embryos and pluteus of S.neumayeri beside dominant amorphous components contained small amounts of clacite, traces of magnesite, dolomite, feldspars and amphiboles. Magnesium calcite was the dominant component of the skeleton and spines of adults. It was estimated that the fraction of Mg was 0.08 in spines and 0.13 in the skeleton. The adult urchin also contained in their calcified structures, like embryos and larvae, traces of feldspars and amphiboles. Such a combination of different minerals in invertebrate embryos, larvae or adults were not registered in recent literature.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija

Napomena
Rad u knjizi objavljen u poglavlju: Adaptation and Evolution in Extreme Environments.

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