How to weigh an elephant seal with one finger: a simple three-dimensional photogrammetric application
Several studies have developed photogrammetric techniques for indirect mass estimation of seals. Unfortunately, these techniques are often narrowly delineated for specific field scenarios or species. Many require sophisticated, custom-designed equipment or analytical tools, limiting their applicability. We aimed to devise a photogrammetric technique for accurate volume mass estimation of seals under a variety of field scenarios without manipulation of the animal and with minimal equipment.