Southern residents lose two killer whales in blow to population

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Southern residents lose two killer whales in blow to population
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One whale born in 1993 and another calve last seen emaciated are missing and presumed dead, according to the Center for Whale Research

Two southern resident killer whales are presumed dead after multiple sightings of two endangered pods failed to turn up a 30-year-old male and a calf.

Latest encounter turns up nothing A little over three weeks later, Malleson got a call from a friend saying orcas had been spotted off the southern tip of Vancouver Island. Andrew Trites, director of the University of British Columbia’s Marine Mammal Research Unit, said the calf’s health may have declined because of a birth defect due to inbreeding or as a result of the mother’s inexperience nursing. When it comes to K26, there’s growing evidence that the southern resident population lives shorter lives compared to its northern resident neighbours, Trites said, pointing to research from some U.S. colleagues.

Search for a lifecycle bottleneck turns south Malleson said research teams are doing drone imaging that shows southern resident mothers are getting pregnant but not often making it to full term. He said he has witnessed a number of miscarriages and stillborn calves.

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