 Grylls however rejected the claims, and said that it was necessary to make sure that there would be just enough resources to sustain the participants, and that caiman crocodiles were added to the island so that if the men or women were to kill them, the natural eco system would not be damaged.The killing of the caiman sparked a number of complaints to Ofcom.A spokesman for PETA said that it showed "a deep ignorance of who animals are and a callous disregard for life", and that the ones who caught and tied up the animal "should be prosecuted".