Ethics of sampling

During fieldwork investigations, ethical considerations should apply:
1) species should be studied in situation and not removed from the position.
2) if removal or disturbance is necessary, the individuals should be returned to the same spot if possible (even if dead).
--> as few individuals as possible should be removed.
3) there should be minimal damage to organisms or the habitat.
4) sites should not be over used and be given time to recover.