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A Shark’s Tale— Why This Ancient Species is Often Misunderstood (Hint: Hollywood)

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In the summer of 1998, executives over at the Discovery Channel introduced the world to Shark Week, a week-long block of television programming dedicated to the mysteries and science surrounding sharks. Since its inception 30 years ago, Shark Week has become a staple of summertime television in America, attracting an average of 20-million viewers each season while earning the title of the longest-running cable TV programming event in history.

At its inception, Shark Weeks programming was designed to increase conservation efforts and defuse some of the social stigmas around sharks. Lately though, the cultural phenomenon that Stephen Colbert joking deemed “one of the two holiest of American holidays,” has been generating criticism from the scientific community and shark advocates who believe that contemporary shows like Caged in Fear, Bloodline: The Spawn of Jaws, and Megalodon: The New Evidence, move further away from conservation and instead promote the dangerous fear-mongering that paints sharks as villains of the sea.  

As Shark Week comes to a close, we at HWF think this might be the right time to shed some light on these ancient creatures of the deep.

Deep beneath the ocean waters swim one of the world’s oldest living species— sharks. Predating the dinosaurs by 200 million years, sharks have roamed the seas for over 400 million years, surviving five mass extinctions! To better understand the evolution of one of the ocean’s top predators marine biologists study the existing fossil records that take the form of shark teeth and scale impressions spanning hundreds of millennia.  Fossilized teeth can provide an astonishing amount of evidence about the lives of prehistoric sharks— from their environment, to their diet, to their size. Since sharks shed thousands of teeth throughout their lifetime, these fossils are abundant.  The oldest confirmed shark fossils are a set of scales found in Siberia that date back to 420 million years ago!!!

Check out this interactive timeline from the Discovery Channel to learn more about the evolution of sharks!

Caribbean reef shark. Photo by: Albert Kok. Wikimedia Commons

Caribbean reef shark. Photo by: Albert Kok. Wikimedia Commons

Unlike other fish, whose skeletons are made of bone, sharks are one of the elasmobranchs (a subclass of marine animals that also includes skates and rays) whose structure is made of cartilage— the firm but supple material that is found in the human ears and nose. Cartilage weighs much less than bone and offers sharks an advantage when it comes to speed, agility, and energy conservation in the water.

Though most people conjure an image of a wide-mouthed, sharp-toothed human slayer (thanks, in part, to the popularity of the Steven Spielberg’s Jaws, whose star, the Carcharodon carcharias aka a great white shark fits this description) the reality is that over 400 different species of sharks exist and the diversity among them is widespread. From habitats, diets, and personality to shape, color, and size, the variance among different families of shark species is vast.

Of the 440 species known today, the largest (whale shark) measures 60 feet (18 meters) while the smallest (dwarf lantern shark) can fit into the palm of your hand.  Though immensely popular, great white sharks actually make up a very small percentage of the world’s sharks. Yet the fascination with them and fear of them seems to persist so long as the occasional human attack can be reported. Although publicity about shark attacks can be great for generating fear and popular headlines, humans are not a preferred food for sharks. Most large sharks prefer to eat marine mammals like seals, otters, and sea lions while other filter-feeders eat plankton, krill, and fish eggs from the water around them.

Great White Shark by Terry Goss at en.wikipedia

Great White Shark by Terry Goss at en.wikipedia

Most shark attacks occur when a swimmer either looks or smells like a common prey species and has been mistaken for food.  It is relatively rare for sharks to attack a swimming human being, but when dressed in a wetsuit or when spearfishing, it is not unreasonable to be mistaken for a seal or a bleeding fish. As media stories and television programming continue to promote sharks as the villains, conservation efforts become increasingly difficult. In 2013, National Geographic estimated that over 100 million sharks are being killed each year— a staggering number that promises to have a major impact on future marine ecological systems if the pattern continues. While sharks are being vilified on television and in movies, individuals are taught to fear them and illegal shark fishing can continue without much social concern.

Perhaps it is time to reframe this inaccurate characterization of these magnificent creatures. Sharks do not pose a threat to human life unless humans encroach upon their space. Even then, the likelihood of a shark attack is extremely low. According to data from the Florida Museum of Natural History,  sharks spark approximately 82 unprovoked attacks around the world each year, with just eight of those resulting in death. Which means that your odds of dying from a shark attack are 1 in 3,748,067!

These 10 shark facts from the Smithsonian’s Shark Girl might help illuminate some of the awesome and impressive qualities that sharks have. 

The Havasi Wilderness Foundation works to create an understanding of the need for environmental education and awareness among world citizens. It is our job to help preserve and protect our planet and all those who live here. If you would like to help support our work, please make a donation to us today.

 

Coral Crisis- Bleaching on the Barrier Reef

Coral Reefs

Coral reefs are in crisis, dying at an alarming rate worldwide. Since 1975, 80-90% of the reefs in the Florida Keys have lost their living coral (NOAA.org). Overall, around 25% of corals on Earth have disappeared and the speed of degradation has dangerously accelerated over the past decade. Marine biologists predict that if deterioration continues at this rate, there will be no active coral to study by the year 2050. If these estimations are correct, within our lifetime we may witness the expiration of some of the most integral members of Earth’s ecology.

Netflix’s original documentary, “Chasing Coral,” highlights the rapid decline of the world’s coral and the cause of the bleaching events leading to its demise. Jeff Orlowski, the film’s director, Richard Vevers, the founder of the Ocean Agency and a crew of passionate scientists, divers, and photographers spent over four months documenting life in and around the Great Barrier Reef to highlight the impact of climate change on coral reefs. As the film points out, prior to “Chasing Coral” much of this devastating loss has been overlooked by the media, largely because people view the ocean as out of sight, out of mind. Vevers, an ex-advertising executive, views this ignorance as an issue with the way the ocean is advertised and hopes that this documentary brings mainstream attention and interest to the travesties happening beneath the ocean’s surface.

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Coral: A Quiet Sophistication

Known as the “rainforests of the sea,” coral reefs are the greatest expression of ocean life and the most biodiverse ecosystems on the planet. A single reef can house over one million animal and plant species and include up to 1000 different species of corals.  Among the 1000 species of reef-building coral, one will find a multitude of varying sizes, shapes, and textures. Some coral species look like large underwater rocks, while others uphold intricate branching patterns that give them the appearance of a delicate fan.

In the film, Dr. Ruth Gates, Coral Reef Biologist at the Hawaiian Institute of Marine Biology, describes that coral is an animal made up of thousands of small structures called polyps. Each polyp is a circular mouth surrounded by tentacles. The inside of the coral is filled with microalgae (small plants) that use photosynthesis to produce food for the animal during the daytime. At night, the corals come alive and the animal extends its tentacles, catching whatever passes by it. For the intricately connected coral animal and the plants living within, symbiosis is extreme. Without the microalgae, corals are at risk of starvation.

 

Coral Bleaching

Coral bleaching is a stress response (like a fever in humans) to warming waters. As the temperature on land escalates, the ocean helps absorb some of that increase. According to recent studies, the ocean has absorbed 93% of the warming created by humans since the 1970’s (IUCN report 2016). When water temperatures spikes above normal range, corals undergo bleaching— a process in which the inside tissues of stressed corals have an impaired ability to photosynthesis and feed the animals. To preserve their polyp and skeletal structure, the animals get rid of plants that are no longer functional and leave behind naked tissues. These bright-white skeletal structures are a far cry from the brilliant corals found in a healthy reef.

During a bleaching event, large swaths of coral reef whiten over the course of a few short weeks. Bleaching itself does not kill the coral. The bright-white pigment pictured below shows the skeleton of a coral that is still alive but without nutrients.  In losing their internal food systems, corals begin to starve. As the coral dies, its surface becomes covered in fuzzy micro algae and the aquatic life surrounding the coral must find refuge elsewhere.

Both shallow (between 3 and 150 feet) and deep (up to 450 feet deep) reefs can be found in nearly every corner of the world. Presently, two-thirds of them are endangered.

 

A Shift In Thinking

Currently, the Great Barrier Reef is the largest living thing on our planet, and in 2016, 29% of it was lost. “Chasing Coral” has drawn the attention of the masses, so there’s no doubt that many will flock to the remaining reefs to catch the last glimpse of their beauty before their predicted eradication. But according to the film, losing the Great Barrier Reef has actually got to mean something. We cannot just let it die so that it becomes photos in an old textbook—it has got to be a wake-up call. After watching “Chasing Coral” and pouring through research,  I began to wonder what it would look like if humans viewed the reefs as vital parts of the Earth’s ecosystem rather than as tourist attractions that are marketed to stimulate local economies. What would it mean if each visitor was forced to study the delicate ecosystem in which they are visitors? Would a transition from voyeur to citizen scientist generate enough conversation for people to realize the detrimental ripple effect that consumption, pollution, waste, and exploitation has on our environment? One can only hope.

After the Hurricane- Wildlife Watch

All week reports from a water-logged Florida, Texas, and the Carribean have been pouring in. Torrential downpours and massive flooding have devastated communities as Hurricanes Harvey and Irma passed through.  Many in the world watched in shock as the sea stormed the barriers, rushing through the streets of Miami to climb the lower levels of high-rises and tearing a path through the Carribean. Without discrimination, the maelstrom claimed humans, homes, and history for its own, leaving piles of debris as the only reminder of what formerly stood. Emergency services were called in to rescue evacuated families and their pets as their homes became victims of the flood.

Accounts of the next storm system, Tropical Storm Jose, have made their way to headlines  and the East Coast of the US is bracing itself for its projected touchdown later this week.

Flooded Homes Near Lake Huston After Hurricane Harvey. Photo Courtesy of NBC News and Getty Images. 2017

Flooded Homes Near Lake Huston After Hurricane Harvey. Photo Courtesy of NBC News and Getty Images. 2017

 

It has been nearly three weeks since Harvey flooded 28,000 square miles of Texas, and almost a week since the Irma struck the Caribbean and Florida. As the flood waters recede, over 200 million cubic yards of debris have been revealed in Texas alone. The extent of damage from Irma, which is still rolling through the country as a smaller tropical storm, has yet to be determined. Today the death toll for Harvey and Irma stands somewhere around 125 people, and hundreds of billions of dollars in property damage has been reported thus far.

Unaccounted for in the post-storm figures are the wildlife populations that could not relocate to higher ground when flood waters were rising. Over the past three weeks, the World Animal Protection Charity has sent emergency teams to Texas and Florida to rescue and care for wildlife. Teams of professional rescuers and volunteers have spent countless hours locating and rehabilitating injured animals following the storms. While clean up efforts in affected areas are well underway, it will take months for teams of experts to understand the full scale impact on wildlife.

Chickens perch on the roof of a hennery to escape rising floodwaters after Typhoon Utor hit Maoming, Guangzhou province August 15, 2013. Photo Courtesy of Reuters. 2017

Chickens perch on the roof of a hennery to escape rising floodwaters after Typhoon Utor hit Maoming, Guangzhou province August 15, 2013. Photo Courtesy of Reuters. 2017

Pets Rescued From Flooded Homes. Photographer: Luke Sharrett/Bloomberg via Getty Images

 

Hurricane Irma Leaves Manatees Stranded 

Last Sunday, Hurricane Irma was still 100 miles away from Tampa when it sucked the water out of shallow Sarasota Bay, an ideal habitat for manatees. The Florida Wildlife Commission had received several calls about stranded manatees, also known as sea cows,  when a passerby and two sheriffs noticed two manatees beached in the newly-dried bay. In a heroic effort to save the protected marine animals, the sheriffs rolled the 1000 pound manatees onto a sheet and dragged them over 100 yards to the sea.

Beached Manatee In Sarasota Bay During Irma. Photo Courtesy of @ManateeSheriff on Twitter. 2017

Beached Manatee In Sarasota Bay During Irma. Photo Courtesy of @ManateeSheriff on Twitter. 2017

 

When a Tree Falls

Trees provide a habitat for already vulnerable species. During a hurricane, high winds can uproot trees and displace the animal tenants living within. Many bird species that use trees as a convenient shelter have the ability to migrate to drier areas, and often times they are aware of a storm before it arrives. Ornithologists describe that most birds can sense even the slightest changes in barometric pressure, which makes them a kind of a living barometer. Once the message has been received that barometric pressure is low, they take flight and head for dryer areas. However, powerful winds can blow the migrating birds off of their course. At best, these birds can reroute themselves back to their homes once the storms have ended, but often they are injured or weakened and have been deprived of food so many do not survive. Both Hurricane Harvey and Hurricane Irma intersected the beginning of the annual fall migration, which according to ornithologists, guarantees some level of bird displacement.

In certain cases, birds do not have the opportunity to migrate away from the storm. Take the red-cockaded woodpeckers in South Carolina’s Marion National Forest for an example.  When Hurricane Hugo hit the area in September 1989, approximately 60 percent of the 500 groups of birds perished when 87 percent of the trees containing cavities where they lived were destroyed. Thanks to extensive rehabilitation efforts, populations have been returned to their numbers in the years since Hugo slammed the state.

Red-Cockaded Woodpecker. Photo from Flickr. 2017

Red-Cockaded Woodpecker. Photo from Flickr. 2017

How Are Hurricanes Formed? 

As deep layers of warm ocean waters stoke an emerging thunderstorm into a mature state, a hurricane is born. Sea surface temperature is one of five factors that influence the formation of tropical cyclones, defined as rapidly rotating storm systems categorized by low-pressure centers, the presence of thunderstorms, heavy rain, strong winds, and low-level atmospheric circulation. Specifically, a hurricane is a tropical cyclone occurring in the Atlantic and northeastern Pacific Oceans.   The warm water temperatures of the Gulf of Mexico make it a notorious landing point for hurricanes. According to oceanographers, temperatures of the oceans in the Gulf of Mexico are the highest that they have ever been in recorded history and these spikes in temperature can account for some of the increase in hurricane potency. Warm water is only one of the ingredients needed to produce a full-fledged hurricane. Humidity, wind shear, and a generally unstable atmosphere are also required to help craft the “perfect storm.”

Ironically, the “perfect storm” is just that for certain plants and animals that survive its force. While hurricanes can be devastating to many wild animal populations, other animals manage to survive and thrive during and after the event. Orchids, gopher frogs, raccoons, and brown bears are among the animals that are generally positively impacted by a hurricane (so long as they survive).  Orchids use intense winds to spread their seeds, frogs breed in heavy rainfall,  raccoons scavenge for food, and bears use the fallen trees as shelter.

Sea turtles, marine life, small ground animals, livestock, and domestic pets can all fall victim to the destruction of habitats and the scarcity of food sources that are associated with hurricanes.

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Baby Sea Turtle on the Florida Beach. Reuters. 2017

Wild West Wildlife Rescuers Rehabilitate Over 200 Baby Squirrels After Harvey. Photo from Facebook. 2017

Wild West Wildlife Rescuers Rehabilitate Over 200 Baby Squirrels After Harvey. Photo from Facebook. 2017

As another Tropical Storm Jose matures in the distance, rescue efforts are still underway for the countless animal victims of the latest natural disasters. While it’s too early to fully estimate impacts of Hurricane Harvey or Hurricane Irma on wildlife, it is important to recognize that recovery efforts will need to extend beyond far beyond human development. Locals in affected areas have begun reporting injured animals to their local officials and people around the world are making donations to support habitat conservation and protection efforts. You can help provide relief for human and wildlife foundations by donating to organizations that you trust.  For more information on individual organizations, click here.

Until next week, remember to appreciate your life, give to those in need,  and keep exploring your world.

Inside the Ecosystems- Kelp Forests Part 1

The Ecosystems exhibit at the California Science Center is a permanent fixture of their wide-ranging offerings. Visitors of the museum can explore eight diverse environments and ecosystems alternating between the “Extreme Zone” and “Rot Room” to the “Forest”, “Island,” and “River” zones. On Saturday August 26th, 2017 the Havasi Wilderness Foundation was given a private tour of the Kelp Forest exhibition, which has been open to the public since 2010. Dr. William Johns, Director of Life Support Systems at the California Science Center, acted as our personal guide for the day.


Beneath the floors of the California Science Center a deep humming emanates from a complex electrical grid that powers much of the facility. Thick pipes carrying water to and from the 188,000-gallon salt water tank housing the Kelp Forest Ecosystems exhibit line the walls and ceiling of the ground level. The area is cooler, wetter, and louder than most other parts of the museum, but the constant purring of water rushing through the pipelines had a soothing effect on me.

The kelp forest at the California Science Center is home to hundreds of marine animals across dozens of species, ranging in size from a microscopic crustacean to a five-hundred-pound giant sea bass. To feed the animals, on-staff divers and volunteer divers are employed to enter the tanks. Some fish require spot feeding methods (picture a scuba diver using tongs to feed chopped pieces of fish or crustacean to other carnivorous fish) to ensure that they receive the proper nutrients. The marine life in the kelp forest ecosystem exhibit eat and excrete several times a day, generating a sizeable amount of waste. Engineers and Technologists at the California Science Center work to develop systems that manage all of the waste.

Giant Sea Bass at the California Science Center. Photo Credit: Alex Havasi

Giant Sea Bass at the California Science Center. Photo Credit: Alex Havasi

Photo Credit: Alex Havasi

Photo Credit: Alex Havasi

Just around the corner from the bottom floor elevator, sits an intricate filtration system comprised of giant cylinders measuring eight feet round and sixteen feet long. Dr. Johns explained that these tanks are packed with pressed gravel to filter out large and small waste matter from the water so that it can be recycled back into the kelp forest ecosystem. Unlike the Long Beach and Monterey Bay aquariums which discharge their marine exhibit waste back into the ocean, the California Science Center relies on sophisticated equipment to recycle and treat their wastewater. After the wastewater is filtered from the aquatic tanks, it starts a complex process wherein the concentrated salt byproduct from filtered saltwater must be flushed with fresh water to avoid an over-concentration of salts, maintaining the delicate salt to water ratio in treatment facilities.

Giant Filtration Tanks. Photo Credit: Alex Havasi

Giant Filtration Tanks. Photo Credit: Alex Havasi

Fifteen minutes into the tour, the elevator dings and the doors slide open, inviting us to move on. We exit and begin our exploration of the dark rooms that provide an ideal viewing space for the saltwater tanks that make up the kelp forest installation. The exhibit itself is two stories tall. At the bottom level, visitors discover the ecosystem from the perspective of the marine life inside of the kelp forest.  As we approach the glass, I see two giant sea bass weaving between the leopard sharks and bright-orange garibaldi that surround them. In the corner of the tank, a moray eel pops its head out from behind a rock and floats, one eye locked warily on visitors to its home.  Three large splashes coming from the top of the exhibit indicate that it is feeding time. The divers, who are extensively trained to distinguish between different species of fish, pull out their tongs, grab a chunk of fish meat, and get to work. When we meet with a shivering volunteer diver later that day, he explains that the challenges of spending an hour in 56-degree water include being extremely cold. “However”, he says, “I love coming to the California Science Center to learn more about the marine life that we feed, and cold or not– I would gladly give up a few of my weekends to keep doing it.”

Scuba Divers Feeding the Fish. Photo Credit: Alex Havasi

Scuba Divers Feeding the Fish. Photo Credit: Alex Havasi

Stay tuned next week as we explore the bottom level of the ocean floor and take an educational tour through the wild kelp forests.

 

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To learn more about our world, visit the California Science Center Ecosystems exhibit.

Kelp Forest Exploration!

Find out what it’s like to experience the kelp forest from inside the tank and you will get a chance to talk first-hand with a diver! Don’t miss the Science Spectacular Kelp Forest Exploration dive show that happens twice daily. Divers interact with animals in the tank and also take questions from guests in the audience—like you! Visit California Science center online

Exploration times:

Monday – Friday: 11:00 a.m. and 1:30 p.m.

Saturday and Sunday: 11:00 a.m. and 3:00 p.m.

 

“Thar She Blows”- a Whale’s Tale

The waters surrounding Channel Islands National Park are abounding with wildlife.  A recent whale watching expedition gave the Havasi Wilderness Foundation the opportunity to interact with some of the 27 species of whales from the family cetacean who call the Channel Islands their home.


Somewhere around 26 miles from the Santa Barbara coastline, calls of “thar she blows”, a popular expression among whalers that is used to sound out the appearance of a nearby whale, could be heard from a choir of young children abroad the Condor Express. Spinning around to secure a spot on the starboard side (a nautical term that signifies the right side of the boat), I could see the short geyser of water that jetted from a whale’s spout.  As we readied our cameras, three humpback whales took turns surfacing for air. The sea around the whales was alive with movement. While dolphins and sea lions could be seen jumping enthusiastically out of the water nearby, the whales themselves were not as easy to see. Their large backsides surfaced long enough for a spout of water to shoot into the air before they bobbed beneath the sea again.

Humpback Coming up for Air. Photo Credit: Alex Havasi

Humpback Coming up for Air. Photo Credit: Alex Havasi

 

Cetaceans are a diverse grouping of carnivorous aquatic mammals that are widely distributed through the Northern and Southern Hemispheres.  The family includes dolphins, porpoises, beluga, and whales, and is separated into two groups: toothed and baleen whales.  As their name suggests, toothed whales (or odontocetes) have teeth which they use to trap their food. Examples of toothed whales include the great white whale (most famously depicted in Herman Melville’s 1981 biopic Moby Dick), the sperm whale, and dolphins. Dolphins can be found swimming deep in the channel as well as in areas around surfers close to the California shoreline. They are some of the friendlier toothed whales and are renowned for their intelligence, curiosity, and complex communication style. Their sophisticated communication capabilities have been described to sound a lot like a whistle which allows them to exchange information with other members of their pod.

Common Dolphins. Photo Credit: Alex Havasi

Common Dolphins. Photo Credit: Alex Havasi

 

The baleen whale (or mysticetes) derives its name from the thick stringy layers of baleen that attach to the whale’s gum line. Baleen is made of keratin (the same substance that human fingernails and hair are made of). Unlike toothed whales, who use sonar to track down food and capture prey with their teeth, the baleen whale vacuums gallons of water from the sea and relies on the straw-like baleen to filter fish and krill from the mouthfuls of water that they ingest.  Austin MacRae, a naturalist from the Channel Islands Naturalist Corps and our guide for the day, explained to us that in one gulp, a large baleen whale can swallow enough water to fill a medium-sized swimming pool! As I absorbed this information, I wondered aloud, how do whales carry and then expel such great amounts of water?  Austin provided the answer: ventral pleats.  Similar to a pelican’s pouch, the ventral pleats that line the abdomen of baleen whales, expand and contract like giant accordions. In one movement, they help push hundreds of gallons of water over the tongue and out of the whale’s mouth. During the expulsion of water, hundreds of small fish and plankton become trapped inside of the baleen where a whale can swallow them whole.

Humpback Whale. Photo Credit: Alex Havasi

Humpback Whale. Photo Credit: Alex Havasi

 

The boat rocked violently in a moody sea as we continued watching the three humpback whales. Known for their particularly large pectoral fins, humpbacks often use the technique of pectoral fin slapping (commonly referred to as “pec slapping”) to attract the attention of the opposite sex during mating season. When slapped against the ocean’s surface, their fins produce a spectacle of booming sounds and massive waves. Though we did not witness any pectoral slapping on our trip, we were amazed to see one of the more high-spirited humpbacks lift its tail high out of the water and smack the surface of the sea. As its tail plunged back into the dark ocean, Austin explained to us that like the human fingerprint, the humpback’s tail fin (called a fluke) is unique to each whale. Currently, researchers use high definition photography to capture images of flukes and add them to a database managed by NOAA (National Oceanic and Atmospheric Administration). These images help identify individual humpbacks, monitor their health, and track their whereabouts. This tracking system is significant because, according to NOAA, Humpback whales live in all major oceans from the equator to sub-polar latitudes and occasionally shipping channels, fisheries, and aquaculture may demolish humpback whale congregation areas.

Humpback's Tail. Photo Credit: Alex Havasi.

Humpback’s Tail. Photo Credit: Alex Havasi.

Humpback. Photo Credit: Alex Havasi

A Spy Hopping Humpback Takes a Look at the Boat. Photo Credit: Alex Havasi

 

Weighing in at a whopping 150 tons, the blue whale holds the record of the largest mammal on the planet. To sustain such a massive creature, 9000 pounds (4.5 tons) of fish and krill must be consumed each day.  Though we did not encounter any blue whales on our expedition, they can be found feeding in the waters off of the Channel Islands during the summertime before heading to the warmer waters of Mexico to have their babies. Austin shared his thoughts about blue whales with me, explaining:

“I always like to talk about blue whales because they are the biggest and heaviest of animal ever to live on the planet! Bigger than any dinosaur even! The heart of a blue whale is the size of a Volkswagen and so, hypothetically, a child could crawl through its arteries. The tongue of a blue whale is as heavy as a bull elephant and their lungs are as big as a school bus. Essentially, they are gargantuan! They weigh 200+ tons and can reach sizes of up to 110 feet long in the Antarctic Ocean.”

Waters off of the coast of California vary drastically from those in the Arctic Circle. A cold northern current and a warm southern current collide in the waters off of the Southern California coast and create large nutrient pockets. These pockets of dense nourishment act as ideal feeding grounds for whales, dolphins, sea lions, and other marine mammals who use the summer months to build up fat stores (blubber) that they will live off of during the winter.  Like human mammals, whales must maintain a body temperature of 99 ° Fahrenheit (37 ° Celsius). In order to preserve this temperature, they migrate from cooler waters in the summertime to warmer waters in the wintertime.

Sea Lions Take a Break From Eating to Sunbathe. Photo Credit: Alex Havasi.

Sea Lions Take a Break From Eating to Sunbathe. Photo Credit: Alex Havasi.

 

As humans, we rely on our autonomic nervous system to regulate our breath. This allows us to breathe involuntarily, without ever having to think about it. Unlike human beings, humpback whales are conscious breathers, which means they have to remember to breathe at all times- even when they are asleep. To ensure that they remember to surface for air, cetaceans conserve half of their brain function while sleeping. Researchers studying dolphin and whale populations in captivity have noted that dolphins seem to shut down half of their brain and sleep with one eye open (the eye on the opposite side of the resting brain) for a period of around two hours. After two hours, the opposite side of the brain shuts down and the corresponding eye will close.  It is mind-boggling to think of the evolutionary trait that encourages continual consciousness among cetaceans.

Like dolphins, humans have been historically curious about the world that surrounds them. With less than ten percent of the world’s oceans having been explored,  there are still entire ecosystems that remain a mystery to us.  Rather than succumb to a life of uncertainty, it is important to feed your curiosity, get outside, and explore your world!

Until next week,

Lola


Interested in whale watching? The Condor Express (Click link to view) is an excellent option for a whale expedition. The leave from the Santa Barbara Harbor and guarantee that you will see whales. If for some reason the captain cannot find any whales during your day trip,  then you can return without a fee to go on an expedition until you do see one. Remember that when you’re exploring, you should take plenty of sun screen, a hat that shades, long-sleeved clothing, and (if you tend to get as queasy as I do) find some Dramamine and bring along a carbonated beverage as this helps sensitive stomachs. Take it from me, you should never go out on a boat without having something in your stomach.  

Anchors up and full steam ahead!