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Three Lionesses Die at Tama Zoo After Pathology Shows Dehydration and Organ Failure

Autopsies found generalized dehydration and multiorgan failure consistent with heat stress, prompting an official investigation into the deaths.

Overview

  • The zoo confirmed that three lionesses named Mugi, Ichigo and Ruena died on July 28, July 31 and August 2 after falling ill in late July.
  • Pathological exams showed generalized dehydration and multiorgan failure in the three animals, and the zoo says heat stress is a likely contributing factor while further tests continue.
  • Zoo staff reported that ten of the park’s 16 lions began showing symptoms such as loss of appetite, fatigue and reduced activity from mid-July, and public lion exhibitions were suspended on July 23.
  • Veterinarians have moved weakened survivors to a private, climate-controlled lion enclosure, given intravenous fluids and medications, and added localized cooling and industrial fans to the habitat.
  • The deaths come during one of Japan’s hottest summers, have drawn criticism from animal-rights groups about captive conditions, and could spur changes in zoo heat protocols as the investigation proceeds.