Scientists are alarmed by the spread of mysterious skin lesions among endangered Southern resident Eorcas. These lesions could indicate a decrease in the whales' immune system defenses. Dive into the investigation of this concerning phenomenon.
Southern resident orcas
The team ruled out environmental events that may be causing the infection, like, changes in water temperature, and salinity. They instead suspect the discolored patches are from an infection and that the increase in these lesions may be a sign that the whale pod’s immune system defenses may be decreasing.
When the whales were first counted in 1974, there were 74 individuals. Those numbers increased to 97 individuals in 1997 before plummeting again in 2001 with 79 individuals. Their current population numbers are less than 75 individuals.
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