By The Associated Press

The Bureau of Land Management is conducting a burro roundup in southern Arizona despite objections from animal advocates as well as a congressman.

BLM spokeswoman Deborah Stevens said the agency started a two-week roundup Wednesday of 350 wild Arizona burros in the Yuma desert.

Rep. Raul Grijalva, D-Ariz., and animal preservation groups have criticized the BLM for not postponing the roundup. They say roundup activity should stop at 90 degrees because of possible dehydration and other dangers.

Stevens says workers will cease the operation if temperatures rise above 95 degrees. She says a safety officer will monitor the temperature on an hourly basis. There will also be a veterinarian on site.

Stevens says the BLM believes it can gather the burros humanely and will stop if they are in stress.