puits (1) temps (durée) (1) espèce (1) comportement (1) histoire (1) eau douce (1) effet (1) conflit (1) taux (1) Causes (1) History (1) Time (1) Stochastic processes (1) Species (1) Snails (1) Sexual intercourse (1) Reciprocity (Commerce) (1) Population (1) Physa (1) Must (1) Maintenance (1) Hypothesis (1) History (1) Intersexuality (1) Fresh water (1) Addition (1) Acting (1) Intersexuality in animals (1) Population (1) Gender (1)