Narwhals
Introduction
Narwhals, the unicorns of the sea, are very mysterious creatures that are not widely known. They are whales with many fascinating features and historical value. This research paper is answering the question, “What are Narwhals?”.
General Description
Monodon Monoceros, Latin for “one tooth, one horn”#; or Narhval, Norwegian for “corpse whale” , because of it mottled coloration suggests a bloated corpse#.Narwhals are in the white whale family, along with the beluga, but are actually covered with spots of black, white, gray-green, and cream. Newborns are dappled gray-brown, white spots come with age#. At birth the calves are about 5 feet long and 180 pounds. Male Narwhals can reach 16 feet long, not including the horn which is 8 to 9 feet long, and weigh around 3000 pounds. Females are around 13 ft. long, do not have tusks, and weight around 2000 pounds. Adult males and females are usually dark in the area of the head, especially top of the head and upper and lower jaws#. Unlike most other whales, Narwhals have no dorsal fin, instead they have a low bumpy ridge that begins at about the midpoint of the back and continues to the fluke#.
Tusks
The tusks, giving Narwhals the name “ Sea Unicorn”, is actually a tooth that can reach up to nine feet long and can weigh up to 20 pounds. Males and females are born with two teeth pointing forward in the upper jaw#. The left tooth of the male grows long and spirals counter clockwise toward the tip. On rare occasions there have been Narwhals with twin tusks. Research on Narwhals supports the idea that the tusk is both a weapon and a symbol of dominance in ritual displays#. Some other ideas about what the tusk is used for include the following: ice breaker or and instrument to poke breathing holes in ice#; rake to stir up the sea bottom for food#; skewer to impale prey species#. One hundred out of three hundred and four males tusks are broken, this might be a result of fighting#. Narwhal tusk can heal itself. Newman, a whale expert, suggests,“If the tusk breaks, it is possible that infection is avoided because of dentine deposits which fill the broken end. This reparative function could explain descriptions by old whalers of Narwhals with broken tusks exhibiting a ‘plug’ in the broken end”# .Tusks sold for $1.25 a pound in 1962, in 1974 it went up to $25 a pound, and in 1976 it was $35#.
The first whale to ever be captured was Moby Doll. The capture of Moby Doll was an accident; the purpose of getting this whale was so a sculptor named Samuel Burich could make a life size model for the British Columbia Hall Aquarium. Moby Doll was shot numerous times, but would not die. Since the whale would not die they decided to keep the whale and put it on display. There was little information on how to take care of the whale. Moby Doll did not eat for fifty-five days while being held captive. They were giving the whale the wrong food and when they finally figured it out the whale killed itself a month later. “Stories of Killer Captive Whales”.
The Narwhal, Monodon monoceros, is a social, specialized deep-water marine mammal characterized by a unique tooth growth protruding from the upper jaw. Narwhals lives along the coasts and rivers throughout the Arctic,characterized by icy ocean temperatures. Narwhals are usually found in groups of 15 to 20, but herds of several thousand have been seen in the Arctic waters since 1871. Regularly found eastwards from the Canadian Arctic to central Russia they have also been distributed throughout the Eurasian Arctic and in an especially high abundance around the oceans west of Cape Farewell on the east coast of Greenland in the summers and during the winter primarily in the Baffian Bay, and in the Canadian archipelago in the springtime (Reeves, Tracey). The Narwhal has two teeth, located in the upper jaw, however only the left tooth usually develops leaving the underdeveloped right tooth in males and typically both teeth in females vestigial (Das). The protruding tusk grows to about 3 meters forward in a counterclockwise spiral pattern (Drury). The distal end of the tusk appears polished, with the remainder commonly covered by a growth of algae. There is an outer layer of cement, an inner layer of dentine, and a pulp cavity that is rich in blood (Reeves, Tracey). The Narwhal’s head and body ranges from 3-6 meters, with the pectoral fin being around 30-40 cm, and the tail flukes expanding over one meter (Reeves, Tracey). The males are typically larger in size than the females averaging about 3,500 pounds in males and 1,000 in females (Drury). Their bodies begin as an uneven grayish hue and as they mature darken to a mottled bluish black color, darker above than below (Reeves, Tracey). Narwhals posses relatively small heads, a blunt sno...
In warmer waters Bull Shark mating occurs year-round while mating females usually receive mating scars on their dorsum, “the back or outer surface of an organ…” (“dorsum”). They typically carry from one to thirteen pups at one time for ten to eleven months. When the female Bull Sharks gives birth it gives birth to free swimming, live young in their nursery grounds that are again, in areas with low salinity and shallow waters (Curtis). The Pups that survive will be around 56 to 81 centimeters long at birth, and grow approximately to be around 340 centimeters when fully matured (Simpfender & Burgess). Female Bull Sharks are typically larger than males when fully grown and mature; the lifespan for both males and females is around 16 years (Curtis). Females on average are around 180 to 230 centimeters long and 285 pounds, and males on average are around 157 to 226 centimeters and 209 pounds, but the biggest known Bull Shark was reported to be 11.5 feet and 500 pounds (Simpfender and Burgess; Curtis). “Bull sharks are pale to dark grey [on their dorsal, and fade] to white on their [ventral, but on] younger individuals the fins have black
The Sea Shepherds are group of volunteers who try to protect the sea animals, and capture criminals who kill the animals without permits. Their website has many purposes, one dedicate to collect donations from the reader. Furthermore, they want to protect the ocean wildlife. The website audience includes people who want to protect the ocean, and they want to save the sea animals which will likely be extinct. They offer the audience a chance to donate, volunteer, and stay up to date with ongoing issues involving marine life. This website is outstanding because the sea shepherds host a successful website that effectively reaches out to the audience through appealing to the reader's emotions, logic, and credibility.
Imagine yourself living in a bathtub for 25 years and you could do absolutely nothing about it. Wild orcas, better known as killer whales have been captured to entertain audiences world wide at aquariums. The most popular location being Sea World. Growing up in Miami, I could not control my excitement when it came time to go visit Lolita the killer whale at the Miami Seaquarium. To be able to see such an amazing creature right in front of me was mind blowing. How amazing is it that you can be face or face with an animal of that size? Well, I wish I'd known then what I know now. In the following paragraphs, I will start off with the difference between the life of a wild orca in the wild versus their life in captivity and I will end with reasons as to why families should not participate and give their time and money to these companies who commit such inhumane acts. I hope that towards the end of this essay, you will change your view on wild orcas and not look at them as just an animal that is used for entertainment purposes.
Orcinus orca is the scientific name for the massive marine mammal. Orcas are not rare, but have declining numbers in some areas (Martin.) Orcas are found from the Artic Ocean to the Antartic Ocean. (Britannica) They belong to the Delphinidae, or dolphin family, which is the largest of their species. Female orcas grow to be at the most 15 feet, and weigh up to 4 tons, but the males can grow as large as 20-30 feet, and weight up to 8 tons. (Martin) The color of the orca is white in some spots, black on the majority of the body, and gray just behind the dorsal fin. It is white on the chin, belly and the eye. The white patch above the eye is usually mistaken for the eye, and may confuse their prey, but acts as a camouflage for the eye. The name “killer whale” makes people tend to believe that this is a viscious man-eating mammal, yet it is one of the most shrewd, docile and playful species of the marine mammals. The orca is sexually mature at 10-15 years of age, much like humans, which is 12-13 years of age. They tend to mate year round, and is able to have a calf every two years. It is interesting to know that lactation of the mother lasts 12 or more months (Wynne.) The life expectancy of orcas is 45-50 years of age.
Their dorsal fin is extremely long, tampered and pointed in a triangular shape or rounded and curved towards the end. The skull is oval shaped and the beak is extremely short and rounded at the end. The killer whale’s jaw is powerful with teeth that are able to tear apart flesh of their prey. They can withstand the jolting, wiggling and hurtling movements of prey that are trying to escape. The killer whale is born with a single blow hole instead of two. Their flippers are paddle shaped with rounded ends and flukes are tapered back and pointed at the end resembling to a triangle/pyramid
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.
Although the dorsal fin of a blue whale is much smaller compared to the rest of its body, it
Tucker, Abigail. "The New King Of The Sea." Smithsonian 41.4 (2010): 26-37. Academic Search Complete. Web. 1 May 2012.
The origin of modern day whales, a mystery that has puzzled paleontologists for years, may have just been solved with the discovery of an ankle bone. This discovery might sound simple and unimportant, but the bones of these ancient animals hold many unanswered questions and provide solid proof of origin and behavior. The relationship between whales and other animals has proven to be difficult because whales are warm-blooded, like humans, yet they live in the sea. The fact that they are warm-blooded suggests that they are related to some type of land animal. However, the questions of exactly which animal, and how whales evolved from land to water, have remained unanswered until now.
Whales are considered to be intelligent mammals, but they live in the water despite the fact that mammals evolved on land. Paleontologist Phil Gingerich has been studying the evolution of whales since 1978. In 1978, he and his team discovered a rock in Pakistan with a skull on the inside. The skull appeared to be a wolf-like animal upon first sight, but Gingerich noticed the distinct whale ear on the skull. The skull, which had characteristics of both whales and other mammals, was that of a common ancestor of the whale known as Pakicetus. Many scientists believe that Pakicetus resembled the seal in its appearance. Pakicetus could not be considered a whale, since its backbone and limbs do not have similar features to those of a whale. Therefore, it is considered an ancestor of the whale, since it has some features of the whale and some unique features (or features of other mammals). Today’s whales have mammalian characteristics, which prove that they have evolved from a common ancestor of the mammal. A whale’s fin also has traits that are common of many species. The fin seems to be similar to that of a fish, but the bones on the inside of the fin are similar to those on a bird’s wing, a monkey’s arm, and a frog’s limb. This seems to be proof that these organisms, and many others, all evolved from a common ancestor. Other proof that whales have evolved over time lies in Egypt in the Valley of Whales, where over 400 fossils of whales currently lie. The desert used to be a large sea that was home to a few kinds of whales. In the Valley of Whales, Gingerich discovered the Basilosaurus, which had small hind legs, toes, and a mobile knee and lived 35-41 million years ago. This fossil is considered to be a transitional fossil, since it ha...
This has been a tradition of the Makah Indians for more than 2000 years. They had to stop in 1926 due to the scarcity of gray whales. But their abundance now makes it possible to resume their ancient practice of the hunt.
That there are various perspectives to the white whale as symbol is a result of the value which Melville
... meat, blubber, bones and oil. Also, orcas hunt humpbacks in packs, especially when there is a newborn (Office of Protected Resources).