Data are saved as a tab-delimited text file (data.txt). Each row represents one snail individual. The file has the following columns: infection - trematode infection (0 = no, 1 = yes) PO_activity - PO-like activity of haemolymph antibacterial_activity - antibacterial activity of haemolymph shell_length - shell length (mm) faeces - amount of produced faeces (mg) d15N_faeces - δ15N value of faeces d13C_faeces - δ13C value of faeces C:N_faeces - C:N ration of faeces d15N_tissue - δ15N value of tissue d13C_tissue - δ13C value of tissue C:N_tissue - C:N ration of tissue

2022