Killer Factoids

Hey Everyone!

So I realize now that while most people will know what a killer whale is, how many know what they are all about? Well, I think a new "feature" in this blog will be a quick fact sheet on the feature species of an internship. Starting with my second favourite cetacean species, the orca, aka the killer whale.

So. Twenty-five facts on the killer whale.

**


1. Killer whales aren't technically whales at all. They are the largest dolphin species in the world.

2. "Orca" means "demon of the underworld". So whether you call them orcas or killer whales, it doesn't really matter. They're pretty hardcore no matter what you call them.

3. An orca's life span is normally between forty and fifty years old. That being said, there is a whale in B.C. that they think is over 100 years old.

4. Killer whales are found around the world. The North Pacific, the North Atlantic, the Antarctic Ocean, and a couple seas as well.

5. Every population has sub divided into two or three "ecotypes" - fish eaters and mammal eaters. They can also be differentiated by colour patterns, eye patch size, foraging/ family behaviours and acoustics.

6. These ecotypes never interact with each other. They avoid each other physically and don't breed with each other.

7. Off the coast of British Columbia there are three ecotypes: The residents (fish eaters), transients (marine mammal eaters) and offshore (fish/shark eaters).

8. The resident orcas feed primarily on chinook salmon. A study that looked at the stomach contents of residents found that over 90% of their diet was chinook. 

9. Transients feed on more of a variety, but only marine mammals. Dolphins, porpoises, sea lions, seals, small(-er) whales. They will not each fish. The Vancouver aquarium's first rescued whale didn't eat for almost a month because they kept trying to feed it fish. They say once you taste red blood you never go back. They're like vampires.

10. We don't know a lot about offshore, but they have found that their teeth are so worn down that we believe they are eating sharks and the skin is grinding down the teeth.

11. Residents live in large pods, between 20-50 individuals. They have matriarchal society, which means each pod has a primary female matriarch. Her offspring stay with her their entire lives, unless a daughter has enough offspring of her own to start their own pods

12. Residents hunt primarily through echolocation, because fish are pretty stupid. They work as a team to take out as many fish at a time as possible.

13. Transients live in much smaller pods, a maximum of 10 individuals. Their society is a lot more fluid, but they also tend to stick close to family.

14. Transients are hunting much smarter animals, and animals that can hear echolocation. So they have to be super sleuth about hunting. They are pretty quiet, working either alone or with only a couple others to bring down their prey.

15. Killer whales share their food. Not just mother/offspring, but any individuals around after a kill will get a piece. And this is transients and residents. There are videos of these massive animals gracefully tearing off small pieces of salmon in order for everyone to have a taste.

16. Chinook salmon are the largest species of salmon on the west coast, which means that not only do killer whales like to eat them, so do humans. This has but a lot of pressure on the killer whales.

17. In the 60s/70s, People decided that killer whales were a pest and a hindrance to the commercial fishing, so the government implemented intense killer whale whaling. A machine gun was set up for the sole purpose of killing orcas. Fortunately, it was never fired.

18. But during the time of whaling and these decisions, the populations took a massive dive. Now, there are about 200 transients, just under 200 Northern residents and only 87 Southern resident killer whales.

19. We don't know yet if the Southern population will ever recover, because they are facing three massive issues: Lack of food, boating traffic and pollution and contaminants.

20. As skillful a hunter as killer whales are (and trust me, they have mad skills), they can't compete with humans. And when they share each kill, and each kill becomes harder and harder to make, the whales really are slowly starting to starve off. British Columbia has some of the most sustainable fisheries in the country, but it might still not be enough. Add on top all the sport and recreational fishers, who are also looking to catch a big ol' chinook, and we have a problem. (If you are buying salmon, ask first if it is wild harvest vs. farmed, and try to avoid B.C. chinook salmon).

21. Orcas are big and can go pretty fast, but boats are faster. If someone is just speeding through a pod of orcas, they might be able to move out of the way fast enough, and those propellers are sharp. Plenty of whales found and assumed dead have been from prop accidents, because usually in nature vs. machine, machine wins. (Go slow in areas known to have killer whales in them)

22. The residents rely on echolocation to find their scarce food source, and boats are extra loud in the water. The sound of motors cover their communications, making it harder, if not impossible, for a pod to hunt. And they are hungry (Don't get close to whales with your motor running. If you find yourself close to whales, shut down to keep quiet).

23. Having to come up for air is hard! Having lots of obstacles in your way makes it even harder! Any kind of water vessel makes it more stressful for killer whales to travel, hunt and breathe, and they can't afford to lose energy stressing out. (Don't get close to whales, and stay out of their path of movement).

24. Southern resident orcas are the most toxic animals in the world. They have accumulated massive amount of toxins in their bodies from pollutants and chemicals found in our waste. Chemicals used as fire retardants, pesticides, herbicides, you name it. (Know what goes into your products!)

25. Entanglements in fishing gear and deaths cause by physical pollution is nothing new to killer whales. Scientists have found tons of garbage in the stomachs of beached whales. (Reduce, reuse and recycle! Replace plastic in your life as much as possible).

Depressed? Don't be! These are amazing creatures and people have dedicated their lives to learn as much as we can about them and through education, learn what we can do to save them!

Speak Loud!

Watching Whale Watchers

Happy One Year Anniversary everyone!!

Yes, one year ago today, I thought it would be a good idea to share my experiences and knowledge of marine biology with the world. As far as blogs so, it's not going to win any awards, but I think it's come in handy from time to time.

So to celebrate the occasion, I figured I would talk about the biggest part of what I came out to Victoria to do: watch killer whales!

There are three major problems facing killer whales off the B.C. coast: lack of food, pollutants and toxins in the water and boat traffic and disruption. The DFO is doing it's best to balance salmon for people and for whales, and we can all do our part by being aware of the chemicals in our products (like PCPs, DBTs, etc.) and by limiting our waste (excess packaging is the enemy!). But one thing that is hard to deal with is boat traffic.

That's where the straitwatch program comes in.

Killer whales are amazing animals. They are huge, intelligent, majestic animals and seeing them really does make your heart sing. We don't want to take that away from people, so we aren't there to harass people on whale watching tours, because people who 'interact' with animals are more likely to want to help them (see my post on zoos and aquariums here).

But having a lot of boats around the whales is a problem, for three big reasons: motors are loud and disrupt their echolocation and communication, boat propellers do an excellent job of cutting up and potentially killing animals when they collide, and boats are obstacles for travelling and breathing. Imagine you are swimming in a pool, and you need to come up for air. If there are people, noodles, toys or boards all around, finding a place to come up for a breath is more difficult, and it puts physical stress on your body. That's what happens to whales when there are ten, twenty, forty boats around. And these guys aren't eating enough to have any more stress put on them.

So the Canadian government has put guidelines in place for safe whale watching. You can't go closer than 100m, you stay out of their path of movement, front and behind, and you have to slow down within 400m of the whales, to limit motor noise and to avoid accidentally hitting one. Failure to follow these guidelines can be considered marine mammal harassment and that is illegal.

Fairly simple, yes? We think so, but they only work if people know them.

So we go out every day in the summer and are on the water basically to educate. We take half-hourly vessel counts around a focal group of whales, as well as perform incidents scans, where we watch for anyone being non-compliant with the guidelines. In between all this data collection, we're talking to private boaters and making sure they know the rules. Ignorance is the environments biggest enemy.

Most of the people we talk to seem to be unaware of the guidelines, although we take every answer with a grain of salt. Some are really interested in the whales and we'll tell them some of the biology surrounding them (I think I'll do a Killer Whale Facts blog soon...) again, to get them interested in the animals and hopefully in their conservation. Some people aren't so friendly though, and really do see the whales as a pest rather than something to protect. We can't change everyone, but we can do our best.

Beyond killer whales, we see some other really cool animals. Harbour seals, harbour porpoises, and the coolest so far, a minke whale! The waters of British Colombia are full of amazing animals, and it's so important for us to try to make a difference.

One of my favourite stories is one of a young boy walking on a beach, filled with starfish that had been washed up on the shore. Hundreds and hundreds of starfish out dying in the hot sun. In the distance, the young boy sees an old man slowly bending down, picking up a single starfish and throwing it back into the sea. The boy watches the man do it again and again, slowly and surely. The young boy walks up to the old man and says "Sir, there are hundreds and hundreds of starfish on the beach. You are going so slowly, you will never be able to save them all." The old man smiled to the boy and said, "You are right, I can't save them all. But I have saved this one, and that will have to  be enough."

Maybe the positive impact straitwatch is making may seem like a small one, but any sized step towards environmental reconstruction is a step in the right direction, and one I am more than happy to make 4 days a week. Even in the rain. And wind. And waves.

Speak Loud!

PS. Have a piece of cake to celebrate this blogs anniversary! I promise I won't tell!