Friday, 19 January 2018

Saiga Antelopes on the brink: Climate change influencing mass mortality

Source: "Saigas on the brink: Multidisciplinary analysis of the factors influencing mass mortality events", Science Advances  17 Jan 2018: Vol. 4, no. 1, eaao2314, DOI: 10.1126/sciadv.aao2314

Authors: Richard A. Kock, Mukhit Orynbayev, Sarah Robinson, Steffen Zuther, Navinder J. Singh, Wendy Beauvais, Eric R. Morgan, Aslan Kerimbayev, Sergei Khomenko, Henny M. Martineau, Rashida Rystaeva, Zamira Omarova, Sara Wolfs, Florent Hawotte, Julien Radoux and Eleanor J. Milner-Gulland

In 2015, more than 200,000 saiga antelopes died in 3 weeks in central Kazakhstan. The proximate cause of death is confirmed as hemorrhagic septicemia caused by the bacterium Pasteurella multocida type B, based on multiple strands of evidence. Statistical modeling suggests that there was unusually high relative humidity and temperature in the days leading up to the mortality event; temperature and humidity anomalies were also observed in two previous similar events in the same region. The modeled influence of environmental covariates is consistent with known drivers of hemorrhagic septicemia. Given the saiga population’s vulnerability to mass mortality and the likely exacerbation of climate-related and environmental stressors in the future, management of risks to population viability such as poaching and viral livestock disease is urgently needed, as well as robust ongoing veterinary surveillance. A multidisciplinary approach is needed to research mass mortality events under rapid environmental change.


Background Information:

"Catastrophic mass die-off of saiga antelopes seen in central Kazakhstan", Phys.Org, 3rd June 2015 by Sarah Rakowski

Image: Saiga carcasses were counted and then buried. Credit: S. Zuther