Heart Disease is becoming a big killer in many developed countries. Even so, chickenpox isn’t a killer anymore. So now that AIDS and many other infections have been over treated, it’s not surprising that heart disease isn’t being as deadly as it used to be. Still, it is the largest killer of women in many countries.
In the Pacific Northwest there are few large animal populations with large prey populations. The killer whales in the eastern north pacific are at risk. As their numbers drop off due to depletion, they will be eaten by the other smaller prey species. It’s the perfect food chain control. It’s why the east and western north pacific have different predatory animals in their marine parks.
The other reason for this predator-prey relationship in the Pacific Northwest, is that the eastern and west coast states have high populations of green sea Killer Whales and Pilot Whales. As their numbers grow in the range of prey animals, they will drive the smaller prey animals from the diet. This means less for the killer whales and less for the smaller marine species. It also means less for humans.
The orcas will also likely be pushed to the brink because their numbers have been growing, while the killer whales and pilot whales’ populations have been decreasing. In this scenario, the orcas will be the ones on the front lines. And yes, they will be the big cats in the food chain. Orcas have been known to target and kill small fish such as herring, sardines, anchovies, souredger etc.
Of course the orcas and killer whales don’t want the other species to get a good meal at the same time. Also it’s a good thing that humans can now watch these killer whales and killer dolphins in the wild. The long absence of human observation has allowed the world to become aware of the great lengths that these animals go through to hunt and feed. There are even reports of them hunting and spearing large mammals like deer and moose. These acts are becoming increasingly common occurrences.
This brings us to another important point. What will the future hold for these different populations? Will the populations of these killer whales and killer dolphins co-exist? Are there areas in the oceans where the two different populations overlap each other? If so, what will happen? We may have to wait and see.