Two deaths reduce orca population to lowest level in 30 years...social structure among the orcas appears to be ?splintering.?

[Emily]

Social structure splintering is observed in human mammals, too. Could environmental causes be shared?

[h=1]Two deaths reduce orca population to lowest level in 30 years[/h] Christopher Dunagan 6:42 PM, Aug 29, 2014
9:54 AM, Sep 2, 2014 SAN JUAN ISLAND ? The endangered killer whale population in Puget Sound continues to decline, with the confirmation of two new deaths this year.
The number of whales in J, K and L pods has dropped to 78, a level not seen since 1985, according to Ken Balcomb of the Center for Whale Research.
No new calves have been born to the three pods since 2012, he said. And, alarmingly, the social structure among the orcas appears to be ?splintering.?..

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http://www.kitsapsun.com/news/local...pulation-to-lowest-level-in-30-years_24504009​