Growth bands in dogfish spines

Stuart R. Stock; Victoria Cooley; Cindy Tribuzio; Luxi Li; Viktor Nikitin; Olga Antipova

doi:10.1117/12.2633826

14 October 2022 Growth bands in dogfish spines

Stuart R. Stock, Victoria Cooley, Cindy Tribuzio, Luxi Li, Viktor Nikitin, Olga Antipova

Proceedings Volume 12242, Developments in X-Ray Tomography XIV; 122420S (2022) https://doi.org/10.1117/12.2633826
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Dogfish (Squalus spp.) possess one or two dorsal-fin spines located at the dorsal midline over the vertebral column. These spines are heavily mineralized, and surface bands of light and dark contrast are used in age determinations. The interior of the spine also contains growth bands visible via optical microscopy of thin sections, but the three-dimensional pattern of growth bands does not appear to have been quantitatively mapped nor has the microstructural origin of the band contrast been established. This paper reports synchrotron microComputed Tomography (microCT) results on spines of Squalus suckleyi. MicroCT was performed at beamline 2-BM of the Advanced Photon Source (APS). There are numerous parallel bands, and their contrast consists of varying (higher and lower) values of linear attenuation coefficient, similar to growth bands observed in other mineralized tissues including mammalian cementum and dentin. The microCT data are supplemented by x-ray excited x-ray fluorescence maps of a sectioned Pacific dogfish spine recorded at beamlines 8-BM and 2-ID-E, APS; of particular note are bands of high Zn content, something which has been found in growth bands in other mineralized tissues.

Conference Presentation

Citation Download Citation

Stuart R. Stock, Victoria Cooley, Cindy Tribuzio, Luxi Li, Viktor Nikitin, and Olga Antipova "Growth bands in dogfish spines", Proc. SPIE 12242, Developments in X-Ray Tomography XIV, 122420S (14 October 2022); https://doi.org/10.1117/12.2633826

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available