Eubalaena austraits or the Southern Right whales, have been affected by whaling in 19th and 20th century. The results showed that as the size class of Southern Right whales increases, the fertility rate of females gradually increases, up to when the size class is between 15.5 m and 15.9 m. Reason Meanwhile as the size class increases, death rate increases which is due to …… The survivorship curve is a type 1 curve, illustrating large mammals. These types of organisms tend to live longer and dramatic death rate when elder. The difference in life history of each organism and their reproduction rate affects the population dynamics. Unlike the case of Southern Right whales, in a population where individuals start their reproduction at early ages,
Should killer whales be kept in captivity? Killer whales are mammals that travel in schools. These mammals eat large fish, seals, and even other whales. Killer whales can be dangerous, and are really big animals. When looking at all the evidence about killer whales in SeaWorld, laws and actions need to be enforced with this dangerous activity.
“… 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.
An English naturalist Charles Darwin (1802-1882) developed a theory of biological evolution. He studied variation in plants and animals during his five years’ voyage around the world in the 19th century. Darwin studied hundreds of species, which he researches variations between locations. His theory states that all species of organism arise and develop through natural selection. Natural selection is the process of organisms that adapt to their surrounding environment, which tend to survive and produce more offspring. Killer whales are remarked to have evolutionary links from land dwelling organisms, millions of years ago. This paper will display the evolution and natural selection of the killer whale.
In this research report I will discuss the Killer Whales unique characteristics; complex migratory patterns, how and why it is endangered, and most importantly how we can help them.
...ats of the whale are still used in some of today’s industries. These parts of the whale have numerous applications in biotechnology. Some of which include, but are not limited to; candles, oil lamps, soaps, and lubricants. Even though their oils have significance in certain applications, the sperm whale is considered an endangered species. This is primarily because of being over hunted. They also have been known to get caught in fishing nets, subject to pollution, also can be severely affected by ocean debris.
...ongest and most determined to survived ended up dying from the same “wave” that made them survive. The correspondent figures out that nature is random and question himself thinking that the reason for survival has some larger meaning. Do we really matter at all?
How would you feel if your mother was murdered directly in front of you and you were only a few weeks old and you did not know how to fend for yourself? That's what these poacher are doing of these whales. They look for mother with fairly new calves because it means they have more fat on them. The more fat the more oil they produce which makes for more money. In Greenland they kill at most ten whales a year. While in Japan they kill five hundred and thirty to seven hundred
Many whales avoid breeding grounds and feeding areas in relation to several different species of whales being beached have had some kind of trauma beforehand. Scientists are starting to research and discover that most of them were bleeding around the brain and ears. Due to all of the naval ships in the area, people began to question if they had any part of the beaching. “Most previous attempts to determine whether military sonar use and whale strandings are correlated have looked at mass stranding records of beaked whales an...
1These two populations are different species because they have different capabilities of performing in nature. For example there is behavioral isolation. My evidence for that is that in the data, it states that the average time spent in courtship display for the St. Kitts rodent is 12.6 seconds. While the courtship display for the Nevis Rodent is 21.3. You can see that there is a major difference in the way that they behave. Also there is another type of isolation which is gametic isolation. There is gametic isolation because the average gestation time for St. Kitts rodent is 29.3 days. The average gestation for the Nevis rodent is 42.7 days. Therefore a sperm from St. Kitts rodent wouldn’t survive in the reproductive tract of the Nevis rodent. It wouldn’t survive because it wouldn’t develop properly and is not accustomed to its environment. There is also another type of isolation happening with the rodents of St. Kitts. This type of isolation is called temporal isolation. There is temporal isolation because the article states, “the reproductive seasons are being delayed by up to one year.” This is talking about that the rodents are having a hard time finding mates therefore, their reproductive season is being delayed. Also in the article it states, “In the 240 attempts to bring a Nevis animal into the St. Kitts population, you are unable to observe a single successful reproductive event.” The rodents are mechanically isolated, because if you can’t have a reproductive event, there reproductive organs might not be matching with one another. Their appearance might look identical but they are genetically different.
Whaling has been a practice that has been around for thousands of years. Whaling has cultural significance for several cultures in the North Atlantic and North Pacific, and there is evidence of whaling since 3000 BCE (Encyclopedia Britannica, 2016).
most of the same factors to keep it alive. Since the Woolly Mammoth has been
... In the debate over the ethics of whaling and its regulation since the formation of the IWC, widely diverse arguments have been made concerning the legitimacy of the whaling enterprise and the economic, ethical, and practical aspects of international regulation. Different views of ecology, culture, and legitimacy as they pertain to a valued resource and its exploitation for human purposes. While it is safe to say one must preserve the historical and cultural value of whaling nations and nations around the world, it can also be said of animals. While many nations continue to cling to their cultural ancestry, background of whaling, and the right for scientific research, it is proven that such human endeavors must be carefully and faithfully regulated.
Their offspring is one. The lifespan of the ring-tailed lemur is 20 years. They have a
Rowat, D., and K. S. Brooks. 2012. A review of the biology, fisheries and conservation of the whale shark Rhincodon typus. Jour. Of. Fish. Bio. 80:1019-1056. (DOI:10.1111/j.1095-8649.2012.03252.x).
First, it would make the claim difficult to prove for the use of vague definition. The