When geoecologist Steffen Zuther and his colleagues arrived in central Kazakhstan to monitor the calving of one herd of saigas, a critically endangered, steppe-dwelling antelope, veterinarians in the area had already reported dead animals on the ground.
"But since there happened to be die-offs of limited extent during the last years, at first we were not really alarmed," Zuther, the international coordinator of the Altyn Dala Conservation Initiative, told Live Science.
But within four days, the entire herd — 60,000 saiga — had died. As veterinarians and conservationists tried to stem the die-off, they also got word of similar population crashes in other herds across Kazakhstan. By early June, the mass dying was over.
Are mass-die-offs like these indications of stress in the larger ecosystem?
(Score: 3, Interesting) by Reziac on Friday September 04 2015, @02:44AM
I'd guess it was some variant of this phenomenon, which has been known to kill whole herds in a very short timeframe:
http://essmextension.tamu.edu/plants/plant/johnsongrass/ [tamu.edu]
"Sorghum forages under the stress of rapid growth or drought generate cyanogenic glycosides, which are converted to free cynanide in the rumen. Free cyanide may be present in freshly frosted plants. Most losses from johnsongrass are caused by cyanide poisoning. All domestic animals are susceptible to cyanide; ruminants are the most susceptible."
As I recall but couldn't find info about offhand, the phenomenon can be sufficiently short-term as to be difficult to ID and impossible to predict, but might be precipitated by an unseasonably early freeze.
It wouldn't be at all surprising to get some imbalance in gut flora as the animal dies and conditions therein change, hence an overgrowth of otherwise-ordinary bacteria (like pasteurella).
And there is no Alkibiades to come back and save us from ourselves.
(Score: 2, Interesting) by Anonymous Coward on Friday September 04 2015, @04:06AM
You could try reading the article, which has this to say:
and
Or, you could Google around and find other articles [eurasianet.org] that would tell you this:
(Score: 0) by Anonymous Coward on Friday September 04 2015, @03:33PM
“The cause of death of the saigas is hemorrhagic septicemia,” Steffen Zuther, a German researcher and the international coordinator of the Astana-based Altyn Dala Conservation Initiative, told the TV channel.
Hemorrhagic septicemia — which scientists believe was rapidly spread across the steppe by ticks in May — is a form of pasteurellosis, a disease that killed nearly 12,000 saigas in a 2010 epidemic.
Mad Antelope Disease
I told you those mothers against drunk antelopes would become a problem...