Blog Tags: Great White Sharks
In the ongoing fight to protect the distinct population of great white sharks off the coast of California and Mexico, Oceana submitted a critical analysis of the federal Biological Review Team’s (BRT) status report used by the National Marine Fisheries Service (NMFS) as the basis for their decision not to list this West Coast population of apex predators under the federal Endangered Species Act (ESA).
Because you can’t keep pulling out the same stale old facts at your Shark Week parties, we're going to hook you up with some fresh new shark facts to astound and amaze your friends and family! When we told a few of these shark facts to the basking shark in the photo below, his jaw dropped:
1. The basking shark uses its enormous mouth to filter plankton out of up to 395,000 gallons (1.5 million liters) of seawater through the huge gills that almost encircle its head
2. The curiously named cookiecutter shark is a parasite that bites circular chunks out of its prey. Holding onto its victim by suction, it twists itself around, using its razor-sharp lower teeth to bite out a cookie-shaped piece of flesh. As if that wasn’t freaky enough, the nocturnal cookiecutter shark lures its victims with glowing green bioluminescent lights on its belly.
While we’re going to file this under the “don’t try this at home” category, a promotional video for the GoPro underwater camera showing a free diver from Hawaii swimming with a great white shark is bringing immense amounts of attention to this majestic predator, and encouraging many to rethink the great white’s fearsome “Jaws” reputation.
The video, entitled “A Blonde and a Great White Shark” shows diver Ocean Ramsey (yes, you read that right) approaching a great white shark and stroking the shark’s back before gently holding its dorsal fin while it swims through clear azure waters. With more than half a million views, the video, appropriately released on Valentine’s Day, shows that the great white shark as a magnificent ocean creature to be respected, loved, and protected, rather than a deadly man-eater to be feared. Ramsey’s website, www.waterinspired.com, quotes the Senegalese environmentalist Baba Dioum: “ ‘In the end people will only protect what they love, and only love what they understand . . .’ I hope that by sharing my experiences with sharks I might inspire others to take action and help protect these amazing creatures before it's too late,” Ramsey writes.
As 2013 rapidly approaches, we wanted to take a moment to reflect on the past year at Oceana. Thanks to your support, we were able to achieve more than a dozen major victories for the oceans! You signed petitions to lawmakers and companies, submitted seafood samples and participated in rallies and events, and it made a difference. Here are five of the major victories we won in 2012 as a result:
1. Alibaba.com stops selling manta ray products
When Oceana discovered that the online international marketplace Alibaba.com was selling manta ray products, we asked for your help in stopping it. Nearly 40,000 of you responded by signing our petition, and Alibaba listened, removing manta ray leather products from the website.
2. Victories for the endangered Pacific leatherback sea turtle
2012 was a good year for endangered Pacific leatherback sea turtles. We helped establish the first permanent safe haven for leatherbacks in continental U.S. waters this year. The government designated nearly 42,000 square miles of critical habitat off the West Coast. The Pacific leatherback was also designated as California’s official state reptile following a bill sponsored and supported by Oceana with the support of thousands of California citizens and more than 30 conservation groups.
Shark Week is almost over, but one of the most exciting shows of the year is airing tonight.
Tonight at 9 p.m. (Eastern and Pacific) tune in to Discovery Channel to watch “Great White Highway,” which follows the secret lives of great white sharks off the Pacific Coast. And perhaps you’ll recognize the narrator – he’s the one and only actor and Oceana board member Ted Danson.
Here’s the show's description:
Right outside the Golden Gate Bridge in San Francisco is home to some of the biggest great white sharks in the world... but only for part of the year. Teams of scientists from Stanford University's Hopkins Marine Station in Monterey Bay have spent years tagging and tracking these sharks to find out why they come here, why they leave and where they go when they do — out into the Pacific on the Great White Highway. But the sharks have kept much about their lives completely secret, leaving researchers with little information about what they spend their summers doing and almost no idea about where they mate or bear their young. Now, armed with new technologies, the team is hoping to wire the ocean and find out how these sharks live their lives — and why California is one of the biggest stops on the Great White Highway.
And if you haven’t already, add your name to our petition to list the US West Coast population of great whites on the endangered species list.
That man-eating shark from Jaws may be fictional, but that doesn’t stop people from believing that sharks are out to get us — even though it’s not true at all.
Chris Neff, a PhD candidate at the University of Sydney, gave this talk at TEDxSydney about his research on the politics of shark attacks. In it, he identifies the three main misconceptions when it comes to shark-human interactions:
1. Sharks do not “attack”.
2. Rogue sharks don’t exist.
3. People don’t always react negatively to sharks following a shark bite.
Stories of sharks biting humans are uncommon, but get a lot of media attention when they do happen and are often sensationalized. A recent increase in shark accidents in Sydney, Australia prompted calls for a massive culling of the shark population.
But the thing is, sharks aren’t attacking humans maliciously. As Neff says, “trying to govern ungovernable events distracts us from real shark bite prevention.” Instead of killing even more of these important predators, we should be restricting areas where humans can swim and dive and changing our own behavior to prevent future accidents.
Because when it comes to sharks, “we’re in the way, not on the menu.”
They’re the stars of Shark Week, one of the most iconic creatures in the ocean. But how well do you really know the great white shark?
White sharks are known by many names—great white, white pointer, Carcharodon carcharias, even white death. They’re the largest existing predatory fish in the ocean, and they’ve been around for about 16 million years. They’re found in coastal waters in all of the world’s major oceans.
The average great white measures in around 14 feet long (the females are generally a few feet longer than the males). An average individual weighs between 1,500 and 2,400 pounds. The largest white sharks ever measured came in around 20 feet long and weighed nearly 5,000 pounds.
All that size makes these sharks powerful predators. Their bite force is an estimated 1.8 tons—that’s 20 times the bite force of the average human! This powerful bite is coupled with multiple rows of sharp, serrated teeth that help the shark saw off pieces of fish.
Great whites also have an additional sense that allows them to detect the electromagnetic field emitted by the movement of living animals. By searching for these tiny electromagnetic pulses and using their excellent sense of smell, sharks can seek out prey from miles away.
In the social structure of white sharks, females dominate males, and size matters. They resolve conflict through rituals and displays of power, and rarely attack one another. Some sharks have even shown behavior that appears playful!
Great whites have earned a bad reputation as ferocious man-eaters due to movies like Jaws and stories about rogue sharks attacking humans. Truth is, great whites aren’t all that interested in humans. They would rather eat a fish or a seal than a human. While a significant proportion of shark accidents around the world involve white sharks, most are not fatal. Great whites are curious sharks, and will give an unknown object a sample bite, then release it.
These powerful creatures may be at the top of the food chain, but their biggest predator is humans. Only a few hundred great whites are left in the population off the coasts of California and Mexico, and they’re not getting the protection they need. Sign today to help get great whites covered by the Endangered Species Act.
Whether you fear them or admire them, most people have an instant reaction when they hear great white shark.
Intrigue, mystery, and terror have guided attention on great white sharks since they lit up the screens in the 1975 thriller “Jaws.” The film made history 37 years ago for its chilling characterization of these powerful sharks, and swimming in the open ocean has never been the same since.
Great whites are making history once again, this time for their globally declining populations from bycatch in commercial fisheries, capture in beach protective nets, and slaughter for their fins, teeth, and jaws in the shark fin and curio trade.
Here on the US West Coast, new scientific studies have shed light on the status of great white sharks off California and Baja California, Mexico. Our great white sharks are even more unique than we thought; in fact they are genetically distinct and isolated from all other great white sharks around the world. They congregate off Mexican Islands and the “red triangle” off Central California (including the Farallon Islands, Point Reyes, and Point Sur), and make extensive offshore migrations to the distant “white shark Café” and even to the Hawaiian Islands.
But, sadly there may be as little as a few hundred adult great white sharks remaining in this population, far less than anyone expected. This low population alone puts these great whites at great risk of extinction from natural and human-caused impacts. Continued existence of these West Coast great white sharks is threatened by their low population size, inherent vulnerability to capture, slow growth rate, low reproductive output, and the ongoing threats they face from human activities. This is why Oceana is petitioning the federal government and the state of California to list this population of iconic sharks on the Endangered Species List.
What is threatening great white sharks off California and Mexico?
Young great white sharks are un-intentionally caught as bycatch in commercial fishing entangling nets. Set and drift gillnets--which together target California halibut, yellowtail, white seabass, thresher sharks and swordfish--catch great white shark pups in their nursery grounds.
Since 1980, over 10 great white shark pups have been reported being caught in these nets every year. The scary part is that monitoring of bycatch on these fishing vessels is very low so take of these pups remains underreported. In other words, more great white sharks are caught than we are aware.
Additionally, young great white shark “pups” caught in their nursery grounds off the Southern California coast have the second highest mercury level tested on record for any sharks worldwide. These mercury levels exceed six-fold the established thresholds where harmful physiological effects have been documented in other marine fish. Levels of harmful contaminants of PCBs and DDTs in their liver tissue are the highest observed in any shark species reported to date globally.
Endangered species status will bestow additional protections to white sharks, including better monitoring and management to reduce fishery bycatch and additional research to further understand these fascinating top predators of the sea.
As much as we may fear them for their bad rap, we need great white sharks to keep our oceans healthy. Just as wolves keep deer populations under control, great white sharks play a critical top-down role in structuring the marine ecosystem by keeping prey populations in check, such as sea lions and elephant seals, benefiting our fisheries and abundant wildlife.
Listing the West Coast population of great white sharks on the Endangered Species List will help us learn more about the lives and threats of these amazing animals through additional research funding and protection measures.
Please help us in our efforts to protect US West Coast great white sharks from extinction by signing a letter of support for their listing on the Endangered Species Act.
You’ve been waiting for it all summer, and now it’s finally here — Shark Week returns this Sunday, August 12th! Oceana is again a conservation partner, and we’ve got some fin-ominal stuff in store this year.
Need some help preparing for the sharkiest week of the year? Have no fear, we’re here to help! Here are some ways you can gear up for Shark Week’s 25th year:
1. Spread the Shark Week Love
Have your friends over for a watch party. Check out Discovery’s programming schedule and pick out the shows that look the best. ”Great White Highway” follows shark scientists in their effort to solve some of the more mysterious behaviors of the most well-known shark in the world. It’s also narrated by our board member Ted Danson! Check it out on Thursday, August 16th at 9 p.m.
2. Spend Shark Week with Oceana
We’re so excited about Shark Week that we’re going to be live-tweeting all the new shows! Follow along on our Twitter — we’ll be watching along with you and answering your shark questions. And look out for some fun Shark Week swag give-aways.
You can also share photos and stories with us via Twitter, Facebook, Pinterest, and Instagram.
3. Protect Sharks
For one week a year, over 30 million Americans are glued to their TV sets, transfixed by incredible stories of amazing, powerful sharks. But the true story is that they can’t save themselves from their top predator: us.
Right now there are only a few hundred adult great white sharks remaining of the U.S. West Coast. They are in danger of extinction, but you can help. Sign today to help great whites off the West Coast get listed under the Endangered Species Act.. [link to action page] You can also help spread the word through social media by signing up at Thunderclap.it/sharkweek.
Make sure that Shark Week isn’t the only time you care about sharks. They’re great to watch on TV, but we need them in the wild, too!
During Shark Week we love watching majestic great whites on TV, but if we don’t act soon to protect them, recordings will be the only place they exist.
In the Pacific, great whites are important predators. As the largest predatory fish on the planet, they can reach lengths over 20 feet and weigh more than 5,000 pounds. They’re shaped like torpedoes and can swim through the water at speeds of up to 15 miles per hour. Great whites can detect electromagnetic currents in the ocean and have such a sharp sense of smell that they can identify blood in the water from up to 3 miles away. You can’t deny that these are impressive animals.
As fearsome as they might be as predators, they’re not the killing machines that they’re often identified as. They use all those prey-detecting skills to help keep the marine food web intact — without great whites, the ocean’s balance would be thrown off.
But that might be what the future holds, if nothing is done. A recent study found that there may only be a few hundred adults left swimming off the coast of California and Mexico, far fewer than anyone expected. And those that are left face deadly dangers from fishing nets.
Newborn great whites are often killed by commercial fishing gear off of Southern California and Baja California, making it hard for the populations to stabilize.
Sharks have inhabited the oceans for more than 400 million years and now they’re disappearing because of human actions. We’re working to get US great whites the protection they need — sign today to help get great white sharks on the Endangered Species Act.
Shark Week starts on Sunday – stay tuned for lots more sharky updates!