Assertion: petrel's population | /r/CapableOf | estimate for markham's storm petrel
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text: Prior to 2019, no concrete population estimates for Markham's storm petrel existed, with a 2004 estimate by Brooke placing the population at likely in excess of 30,000 individuals, a 2007 estimate by Spear and Ainley placing the population between 806,500 in austral spring and 1,100,000 in austral autumn, and a 2012 IUCN estimate placing the population at 50,000 overall individuals.