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):