Porpoises, belonging to the genus Phocaenidae, are close relatives of dolphins. One of their unique characteristics that differ from other species of the same order is that they can produce clicks for echolocation at frequencies inaudible to humans. The reason for this is majorly influenced by the Orca, also known as the killer whale. Also, while at first glance dolphins and porpoises look of the same species, they actually are classified into two different geni. Part of this separate taxonomy is due to their many different yet unnoticeable mental and physical characteristics. These two distinct creatures also share a long line of ancestry. Biologists know this because of many found fossils of transitional aquatic mammals.
There are many physical differences between porpoises and dolphins. Porpoises, which are smaller and darker, have flat spade-shaped teeth whereas dolphins have sharper cone-shaped ones. A more observable feature is their triangular dorsal fin compared to the curved wave-like one of most dolphins. They also have a blunt and smaller "beak" (rostrum) than the known bottlenose of some dolphins. Lastly, they live in a deeper and cooler location.This is their most important difference because it explains the evolutionary changes of most of the characteristics listed. They evolved to accommodate for their new
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Echolocation is when an organism determines the location of something by measuring the time it takes for an echo to return from it. Porpoises unlike dolphins produce clicks at frequencies greater than 100kHz. This in theory resulted from a selective pressure imposed by their biggest predator, the killer whale, which has a maximum hearing limit of 100kHz (Tabor, paragraph 3-4). Porpoises usually travel solely or in groups of 4, therefore they would not provide enough defense against them. They instead developed this high click strategy to disregard them completely. Dolphins
No i believe that orcas should not be kept in captivity There are 3 reasons why they should not, firstly orcas mistreat each others, second you can’t recreate their environment, and lastly orcas can be dangerous in captivity.
Dolphins make up the largest and most diverse family of cetaceans. The family contains 26 recognized species of which 13 tend to have long well defined beaks and streamlined robust bodies. Many vary in size, shape, colors, beaks and flippers, as humans have various characteristics.
An orca, more commonly known as a killer whale, is currently one of the largest marine animals held in captivity. Countless arguments are being made, supporting and opposing captivity of orcas to be exploited as circus animals in theme parks around the world. Throughout recent history, Sea World trainers have been injured and killed by the orcas and the whales, and the whales themselves have been observed as severely depressed. If Sea World releases the whales, they would undergo an immense economic downfall and the whales would be too weak to survive in the wild if they were freed. Since the first Sea World park opened in San Diego, California in 1964, common questions have arose concerning the well-being of orcas in captivity, the dangers of humans training them, the physical capability of whales theoretically being released, and the psychological differences between whales living in the wild versus whales living in Sea World's confinement.
Sarai Michel English 9HP, Period 4 When I was six years old, my parents took me to SeaWorld for the first time. I remember clearly watching the Shamu show and sitting in the splash zone, ending up soaked in water by the end. But I also distinctly remember wondering how an animal so big and beautiful could ever be happy in such a small tank, so far away from home. The animals could never possibly experience the joy they would have out in the wild where they belonged.
A unique feature the Humpback whale has is its very big flipper or fin. It has one of the biggest whale flippers, which can be found on planet earth. The flipper is used to change
Killer whales are one of the most fascinating displays of ocean life. The killer whale has characteristics that are important to its survival in the ocean. It is interesting to know that killer whales have a plentiful diet. It is astounding to see how killer whales behave in the ocean. I plan to tell you about the killer whale, its characteristics, its diet, and its behavior in the ocean as well as the predation of the orca.
A bottlenose dolphin, Tursiops truncates, has a streamlined body. A dolphin's outer skin layer (epidermis) is about 10 to 20 times thicker than the...
Orca whales do not like to be taken from their family, held captive for many decades and put with other whales that they do not know. No other living organism on this planet would like to be put through the same thing. Orca whales are highly social animals, they are very intelligent, and are very emotional. If they are kept away from other whales, fed intermittently and received little attention from staff makes them get very emotional and can lead to death of people and the whales. Orca whales should not be held captive; they are beautiful creatures that are not great for people’s amusement and if they are treated poorly, they will act poorly.
Orcas have fusiform bodies, meaning that they are spindle-shaped. This allows them to glide through the water with very little resistance. The male and female orca are different in terms of their size, weight, and the shape of both their dorsal and pectoral fins. Males generally range from 22 to 27 feet in length, weighing between 8,000 and 12,000 pounds. Females generally range from 17 to 24 feet in length, weighing between 3,000 and 8,000 bounds. A male’s pectoral fins, dorsal fins, and flukes grow larger than a female’s grow, making it easy to distinguish the sexes of the species. Orcas are easily recognizable due to the coloration. While mostly black in coloration, the area behind the dorsal fin is tinted gray,
Killer whales communicate by a series of clicks and whistles called vocalization. Each pod, or family, has their own unique language. This gives whales the ability to identify their own pods. Orcas have a brain that is about five ti...
Whales are spectacular marine mammals that can weigh as much as 8 to 12,000 pounds. However, this mammal has certain swimming patterns, which are different than fish. Of course, there are many physical differences between whales and fish, but more importantly how they live and survive in the oceans. However, the swimming patterns of whales vs. fish and the adaptations whales have that help them survive vary greatly. Whales, unlike fish, have bones in their flippers. Because whales are warm blooded and massive, they consume way more food than ordinary fish. This provides the whale with a supply of blubber that helps the whale thrive in the ocean. A big difference between swimming with whales and fish are their tails. A fish's tail is pointed vertically, while a whale's (and a dolphin's) is pointed horizontally. Fish tend to swim from side to side (which is apparently called lateral
Penguins and Orcas are different because penguins huddle in groups to stay warm and the orcas don't because they just stay warm by themselves and because they don't travel in groups. On the other hand penguins are apart of the bird family unlike orcas who are apart of the sea. In other words orcas have rubbery skin and penguins have scale like feathers. Orcas use spyhopping to find their dinner while penguins use their beak/nose. As well as penguins
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)
There are many reasons why dolphins are very intelligent animals, there are 33 different types of marine dolphins, 4 types of river dolphins, and 6 types of porpoises (dolphins are mammals). Some of the dolphinspeople may think they would be whales, because of their looks, but they are dolphins. Dolphins have a strong behavior; they are very social and travel in groups together. They commonly swim in groups of 2-15 . Severalof different groups of dolphins may temporarily join, for several minutes or hours. In the open waters of theocean, some dolphins will leave their group and change associates and adapt with different dolphins threw outtime (Dolphins communication). In the groups, some members will form a strong bond with one another in thepod. The sizes of the groups tend to increase with the water depth of the ocean and the openness of the habitat, this usually happens when protection with strong with each other and foraging st...