Southern residents are facing starvation and currently only eating every 1-3 days
75-90% of the Southern Resident Orca’s diet is specifically Chinook Salmon
Chinook Salmon populations have dropped 60% since 84’ and runs in Washington have decreased to 1% of their historic amount.
Bio Accumulated Toxins According to the National Center for Biotechnology Information, Southern Resident Orcas carry some of the highest PCB concentrations of any mammal.
PCBs were used for electrical cooling and technology but was banned in 1979. It is a persistent toxin and it can evaporate and come back down with rain.
When outlawed, many companies producing PCBs illegally dumped old materials (like Monsanto did.)
High PCB content in Cetaceans like Orcas and dolphins has been shown to cause
Premature death of calf
Sound interference from boats Boats have been shown to create high frequencies underwater, 10,000 to 40,000 hertz. This is same range that orcas and other toothed whales use to hunt and talk to each other. This makes it very hard for orcas to hunt and communicate, forcing them to essentially scream over the interference, show odd behaviors like tail slapping, although distance rules are obeyed.