file 4: "4_body_composition_predation.csv"

The data in the different columns represent:
sampling_station	-	id of sampling station
length_mm			-	length of a cockle in mm 
height_mm			-	height of a cockle in mm
width_mm			-	width of a cockle in mm
afdmflesh_rel		-	relative ash-free dry mass of cockle flesh
dmshell_rel			-	relative dried shell mass of cockles 
predation			-	factor indicating predation "treatment"; "yes" indicates a predation plot, and "no" indicates the reference plot 
sampling_occassion	-	factor indicating the sampling occasion; "before" indicates initial sampling, and "post_pred" indicates final sampling