OA Geoduck Morphology Measurements

Using a compound microscope and an iPhone camera, images were taken of geoduck larvae for the purpose of recording morphological measurements – length, width, and area – using ImageJ.

An example of an image used to take measurements:


Using ImageJ, the individual larvae are labeled using M#_L#. Where “M#” is the sample tube of larvae for the morphological data, and “L#” is the larvae number within a sample.

According to literature (Ferreira-Arrieta et al., 2015) it has been found that for the age of the larvae during the first several sample sets which I have measured, the average length is 110 +/- 30 µm (0.110 +/- 0.03 mm). This is close to the measurements that I have done.

A portion of the data thus far (measurements are in mm):

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