In situ growth evaluation of scleractinian corals using underwater photography and 3D modeling applications


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Juergen.Laudien [ at ] awi.de

Abstract

In order to gain accurate information on coral growth increments, the buoyant weight technique (BWT) is a commonly employed technique. However, this method is not readily applicable for in situ studies, as individual coral fragments need to be retrieved regularly to be measured in the lab. The use of 3D photogrammetry on the basis of underwater photography eliminates both of these issues. The pictures as a source for the data can be directly taken from the in situ setup with underwater photography. Consequentially, no transfer of specimen to the lab is required, stress is limited for the coral specimen. This new digital tool further enables data acquisition in remote places without laboratory access. The process turning underwater pictures into 3D models involves three steps, including the creation of a 3D model, and the subsequent calculation of its respective volume. Potential pitfalls of this application are discussed. This non-invasive method is beneficial not only for coral reef research but also applicable for projects with other sessile animals.



Item Type
Conference (Poster)
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Not peer-reviewed
Publication Status
Published
Event Details
YOUMARES 6: A jounay into the blue - Ocean Research and innovation, 16 Sep 2015 - 18 Sep 2015, Bremen.
Eprint ID
38822
Cite as
Roßbach, F. and Laudien, J. (2015): In situ growth evaluation of scleractinian corals using underwater photography and 3D modeling applications , YOUMARES 6: A jounay into the blue - Ocean Research and innovation, Bremen, 16 September 2015 - 18 September 2015 .


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