Wild monkeys in the Fukushima region of Japan have blood abnormalities linked to the radioactive fall-out from the 2011 nuclear power plant disaster, according to a new scientific study that may help increase the understanding of radiation on human health.
The Japanese macaques (Macaca fuscata) were found to have low white and red blood cell levels and low haemoglobin, which the researchers say could make them more prone to infectious diseases.
But critics of the study say the link between the abnormal blood tests and the radiation exposure of the monkeys remains unproven and that the radiation doses may have been too small to cause the effect.
The scientists compared 61 monkeys living 70km (44 miles) from the the Fukushima Daiichi nuclear power plant with 31 monkeys from the Shimokita Penisula, over 400km (249 miles) from Fukushima. The Fukushima monkeys had low blood counts and radioactive caesium in their bodies, related to caesium levels in the soils where they lived. No caesium was detected in the Shimokita troop.