At first sight, toothed whales and baleen whales look identical, but on closer examination, there are significant differences. Toothed whales and baleen whales can be classified in the domain Eukarya, the kingdom Animalia, the phylum Chordata (vertebrates), the class Mammalia (mammals), and the order Cetacea. Toothed whales and baleen whales belong to the order Cetacea (from the Greek word “Cetus” which means whale), which can be divided into three suborders: Mysticeti, Odontoceti, and Archaeoceti. Mysticeti, or baleen whales, include whales such as the Blue whale, Humpback whales, Grey whale and Right whale. Odontoceti, or toothed whales, include whales such as Sperm Whales, White Whales, Beaked Whales, Dolphins, Pilot Whales, Killer Whales, …show more content…
The physical traits and genetics of the dolphins are not the same as the whales. One major difference is the size. Baleen whales tend to be bigger than toothed whales. The length of baleen whales vary from eleven to one hundred and ten feet, while toothed whales are much smaller. Their length varies between four to thirty-five feet. In addition, toothed whales have one blowhole, while baleen whales have two blowholes. As stated earlier, baleen whales have hair-like structures in their mouths to filter seawater and trap small creatures, while toothed whales grow teeth to eat meat. Male baleen whales are usually smaller than female baleen whales while for the toothed whale, it is vise-versa. Both types of whales have a very similar evolutionary history, and are believed to have evolved from their ancestor Pakicetus (a land mammal), which then evolved into Ambulocetus (which had limbs and was amphibious), then into Kutchicetus (an otter-like mammal with a long tail), then into Rodhocetus (though it's splay-footed posture demonstrates that Rodhocetus was capable of walking), or at least dragging itself along on solid ground, for short periods of time), and then into Dorudon (a primitive whale with teeth). The Dorudon evolved and split into two types of modern whales, the Mysticeti (baleen whales) and Odontoceti (toothed …show more content…
Although these whales shared a common ancestor, they branched out into two suborders Mysticeti (baleen whales), and Odontoceti (toothed whales). Baleen whales use baleen to filter out out large amounts of seawater and trap plankton and small creatures, while toothed whales use echolocation to track their prey and their teeth to capture their prey. Toothed whales are very social and tend to show less fear of humans, while baleen whales are not as friendly but travel in
David Kirby’s book describes the complex issues of whales in captivity. The death of a SeaWorld trainer brought up many objective reasons of the training practices of this business were not effective at keeping trainers safe in the water. Currently this debate is still being tested in a court of law. OSHA claims that even with the precautions that SeaWorld tries to use, it still cannot guarantee the safety of trainers in the water. This cultural topic has been gaining ground, and recently prompted a movie based off this book titled, Blackfish. The audience of this book includes animal activists, followers of David Kirby, and people that are interested in the topic of killer whales in captivity. Rob Grom was contracted to create a book jacket that would visually depict the context of the David Kirby’s book. The photographer uses his work to persuade people to look into the claims of the book and see another side of the animal park. Grom’s Photograph image uses the picture, the words of the title, and the subtitle to create a twist of the logos, and uses David Kirby’s ethos to create an appeal to the book.
Image sitting on the beach one July morning. The sun is beaming down and decide to go for a swim. As you approach the water, you see a whale unusually close. You begin to get nervous as it continues to approach the shore. However, you aren’t worried because you know that they are confined to the sea. As the whale comes near you can see it clearly. Just as you think that it will turn around, the whale walks out of the ocean!
“… building a tank the size of Rhode Island wouldn’t be large enough for a six-ton male killer whale such as Tilikum, an animal capable of swimming 100 miles a day,” states an anonymous whale expert. Whales have been in captivity since 1861 when P.T. Barnum displayed the first live whale that was captured in Canada. However, Barnum had no idea how to care for the mammal and it died after only a week in captivity. (Animal Legal and Historical Center, 2014) Being up close with killer whales could give us some clues about how they interact with each other, including physical behavior, their dialect, and how their pods work together as a family unit. However, what we are finding is that whales who belong in the wild are suffering in captivity. Killer whales have no record of ever harming a human being in the wild. In captivity, there have been many incidents of killer whales harming or even killing their trainers. What would cause them to do this in captivity, but not in the wild? They have been known to resort to aggression toward themselves and each other, in what scientist believe to be a stress induced behavior. (Animal Legal and Historical Center, 2014) Evidence against having these wild animals in captivity is increasing and we need reevaluate the value of capturing and holding killer whales for our educational purposes, enjoyment, and profit.
The Killer Whale is a part of the toothed whale (odontoceti) suborder. The toothed whale suborder is consisted exclusively of porpoises, whales and dolphins that are born with teeth, instead of baleen plates. The Killer Whale is the largest animal in the dolphin family and is the only known to attack sharks, whales and other marine mammals.
Shirihai, H. and B. Jarrett (2006). Whales, Dolphins and Other Marine Mammals of the World. Princeton, Princeton University Press. p.185-188.
Whales living in captivity become aggravated and have been known to take out anger on themselves by self harming. In the pools they live in, metal bars are placed in between the pools to prevent the killer whales from swimming to another pool. On several occurrences, the whales have attempted to bite and break the metal bars. This leaves the whales with broken teeth and a risk of infection. Infections in killer whales can lead to death in many cases. If a whale gets an infection, they have to be taken out of the pool and placed into another pool by themselves to prevent any problems with other killer whales they live with. In many cases, whales with infections need serious care from whale specialists.
While whaling isn’t nearly as popular today, in this time many men made, or attempted to make, a living in this industry. Despite the hard work, dangerous standards and general intimidation, shipmates were lured into the industry for the high pay. When feeling protected by a large ship, weapons and a fearless captain, it was easy to forget the power of what they were hunting. The sperm whale is the largest of all the toothed whales, with males maturing at an average size of fifty- two feet and sometimes can reach up to sixty-seven feet in length. “It’s twenty-foot-wide tail pumped up and down.” (Philbrick, 2000, 82) The domain of life that the sperm whale belongs to is the Eukaryote. This is because the sperm whale is an organism that is made up of cells that contain a nucleus as well as other structures that are enclosed by the cell membrane. The kingdom that it belongs to is the Animalia. This is because they are multi-cellular organisms. These animals contain other distinct features including; “interior digestion of f...
...ould estimate where they spent most of their time. By the length of the other skeletal bones, the size and shape of the animals could be determined, which also shared insight to its behavior. The largest primitive whales could indeed walk on land, but only did so for short periods because their legs could not take so much weight for long amounts of time. These behaviors allow scientists and paleontologists to understand even more as to how these fascinating and mysterious animals went from ruling on land to taking over the sea.
Orcas, also known as killer whales, are amazingly intelligent and are a top predator, much like humans. However, when the top predator of the ocean collides with the top predator of land, the situation can become fatal for both humans and the whales. Holding these incredibly massive marine animals in captivity is not only inhumane and detrimental to the whale’s health, but also a potentially fatal activity for humans to participate in.
Orcas, commonly known as killer whales, are actually the largest member of the dolphin family. They were given the name “killer whale” by sailors who often observed them attacking and killing seals, sea lions, walruses, penguins, dolphins, polar bears and even other whales (Orcas).
Orcas, or killer whales are majestic giants of the sea. They are actually the largest type of dolphin. They have long black bodies with distinct white patches near their eyes. A killer whale can be up to 32 feet or more in length, and weigh up to 12,000 pounds. Females are a bit smaller, but live longer (Gorman). The name “killer whale” apparently came not because it is a vicious whale, but because it preys on whales. They do not have any natural predators, and they are considered the “top dog” of the ocean. Not even the great white shark stands a chance against these superb killers. “Unlike sharks, killer whales are cautious hunters, sometimes spending hours harassing a 1,000-pound sea lion so it can easily be drowned” (Francis). Orcas use many hunting tactics that are unique to their species, which is what makes them invincible.
The morphology of whale sharks is mostly similar to aquatic fish species, but many specific traits help differentiate them from the rest. Whale sharks are the largest fish in the world and can reach a size of around 20 meters (Martins, C., and C. Knickle). This is often compared to the size of a school bus. The shark has a very large transverse mouth. They have 5 very large gill slits and have a larger first dorsal fin compared to the second one (Whale Shark). They have a distinctive spotted “checkerboard” pattern with stripes (Martins, C., and C. Knickle). It is not exactly known why they have this specific body marking. It is believed that the body markings act as a camouflage. The strange thing about whale sharks is that they have 300 rows of teeth that play no role in feeding (Martins, C., and C. Knickle).
Humpback whales breath voluntarily, unlike humans. Since they have to remember to breath, researchers believe humpbacks sleep by shutting off half of their brain at a time. Like orcas and dolphins, humpback whales have noses at the top of their head called blowholes (Animal Planet). Humpback whale calves do not stop growing until they are ten years old (National Geographic). They breed, give birth and care for their newborn calves in the warm waters of Tonga. Instead of teeth, humpbacks have baleen plates, they are brush-like strands of bristle that trap there food until it is swallowed. They have very odd mouths that curve downwards, like an eternal frown. Humpback whales are amazing marine mammals (Big Animal Expeditions)
Did you know in the world there are more than 90 species of whales, dolphins, and porpoises? (WDC) The dolphin is a very important animal to the ocean and there are many different types to discover. In order to learn about dolphins, it is important to discuss where they live, their appearance, and what they eat. Some helpful words to understand are “dorsal fin”, a dorsal fin is the top pointed fin on the dolphins back, “flippers”, a flipper is a flat fin that dolphins use to swim, and “echolocation” is a tool dolphins use to find food by sounds bouncing off of objects (dictionary.com).
The whale shark is a species with a fascinating ecology, life history, behavior, anatomy and physiology. Background The whale shark’s broad, flat head and large mouth make it very recognizable. Females typically grow to be bigger than the males and weigh anywhere from 47,000lbs to 66,000lbs as adults.