## Non-invasive imaging methods applied to neo- and paleontological cephalopod research

• Several non-invasive methods are common practice in natural sciences today. Here we present how they can be applied and contribute to current topics in cephalopod (paleo-) biology. Different methods will be compared in terms of time necessary to acquire the data, amount of data, accuracy/resolution, minimum/maximum size of objects that can be studied, the degree of post-processing needed and availability. The main application of the methods is seen in morphometry and volumetry of cephalopod shells. In particular we present a method for precise buoyancy calculation. Therefore, cephalopod shells were scanned together with different reference bodies, an approach developed in medical sciences. It is necessary to know the volume of the reference bodies, which should have similar absorption properties like the object of interest. Exact volumes can be obtained from surface scanning. Depending on the dimensions of the study object different computed tomography techniques were applied.

Author: René Hoffmann, Julia A. Schultz, Rico Schellhorn, Erik Rybacki, Helmut Keupp, S. R. Gerden, Robert Lemanis, Stefan Zachow Article Biogeosciences 11 10 2721 2739 2014 To access the corresponding discussion paper go to www.biogeosciences-discuss.net/10/18803/2013/ - Biogeosciences Discuss., 10, 18803-18851, 2013 urn:nbn:de:0297-zib-50300 https://doi.org/10.5194/bg-11-2721-2014