To determine whether one type of carbonate was predominantly removed by sea urchins, the data of the coralline aragonite and magnesium calcite contained in the feces were compared by a Mann-Whitney U test.
Para evaluar si alguno de los tipos de carbonatos removidos por los erizos era predominante, los datos de aragonita coralina y calcita de magnesio contenidos en las heces se compararon mediante una prueba U de Mann-Whitney.