Scientists are concerned after a recent study found that there has been a 'dramatic' increase in skin disease in an endangered North American population of orcas, and they don't know why.
Scientists are concerned after a recent study found that there has been a"dramatic" increase in skin disease in an endangered North American population of orcas, and they don't know why., researchers studied a"strong increase" in skin lesions in the population of southern resident orcas from 2004 to 2016.
The"possible" relationship between these lesions and the"decreasing body condition" of the endangered, non-recovering population is a concern, according to the study. The study found that 99 percent of the animals examined exhibited the skin disease. The scientist studied a vast number of photographs obtained by the Center for Whale Research that showed nearly 20,000 whale sightings in the Salish Sea – off the coast of British Columbia and Washington state.
The paper explores possible causes, including warming coastal waters and the effects of man-made organic pollutants or an increasing scarcity of chinook salmon numbers reducing their immunity. Still, it cannot yet draw any firm conclusions.
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