Sea otters are a keystone species in the Pacific Northwest and the marine ecosystems found along California’s shoreline. Sea otters are a very…
According to the article “Search for the Missing Sea Otters: An Ecological Detective Story” by Mary E. Allen and Mark L. Kuhlmann, the sea otter population has been decreasing at a rapid pace since the 1990’s in Aleutian, Alaska. This is demonstrated by article “What Could be the Cause of Decreasing Otter Numbers” which states that in 1997, the decline of the sea otter population had increased to about 90%. They hypothesize that the decrease in the sea otter population has been caused by their predator, the killer whale because the sea otter’s bodies do not come ashore. The evidence suggests that killer whales are eating the sea otters because in the text “What Predator Could be Causing the Large Decrease in Otter Numbers”…
The reading states that the pollution hypothesis seemed the more likely cause for sea otter decline and provides three reasons of support. However, the professor states that predation hypothesis is the most likely cause of the sea otter decline and refutes each of the authors' reasons. First, the reading states that increasing in levels of chemicals could decrease the otters' resistance cause infections to life-threatening infections and death to sea otters. The professor opposes this point by saying that this point is weakened because people could not find dead sea otters on beaches.…
Chinook salmon (Oncorhynchus tshawytscha) is an ecologically and economically valuable species that is found along the Pacific coastlines of Asia and North America. Unfortunately, many Chinook populations have been steadily declining during the last century, primarily due to a variety of human activities. These threats include hydroelectric dams, chemical pollution from planes (Dietrich, et al., 2012), and sound pollution from industry (Halvorsen et al., 2012). North American governments and hatcheries have implemented a variety of intervention measures to help restore this species, but the salmon are still struggling to recover in certain parts of their range. As a result, salmon-dependent marine organisms, especially the endangered Southern…
The bald eagles diet mainly consists of fish and other types of creatures that can easily be snatched out of a river or lake by the eagles sharp claws. The habitat of the bald eagle is mainly by a water source for example a river or lake another one of their habitats is a American wet land where its moist and by a water source. A bald eagles features are very interesting the average bald eagles height of a bald eagle is 30 inches, the average weight of a bald eagle is 8-12 pounds, the average wingspan is 6-7 feet long. The bald eagle lives in any type of wetland mainly by a lake or stream were it is easy to catch their prey fish.…
History cannot be defined by the story of an individual; however, one person’s story can attempt to influence history, often through print. Via publishing their own narratives, Bibb and Otter both expressed their sentiment for broad influence, to varying success. Bibb leverages legal and religious debates to appeal to rational Northerners and poor whites, while Otter markets his wilder and more violent lifestyle towards his jolly fellow brethren and those fascinated or disgusted by his multitudes of amoral sprees through a series of short stories. Throughout his entire narrative, Bibb repeatedly references “All-wise Creator” [17], and “common law” [24], nods to God and legality, to decry and expose the hypocrisy of slavery, addressing both…
Wolves had been missing in Yellowstone National Park for more than 70 years. As a result, the ecosystem of the Park had completely changed. Without any predator that threatened them, the number of deer had grown overreact, destroying vegetation and forcing other species to look elsewhere in order to survive. In 1995 they decided to reintroduce a small number of wolves. Only with their presence, the wolves managed to recover the entire ecosystem: from bears, foxes, eagles, otters, up to all kinds of animals were benefited by the wolves and recovered their habitat; and not only that, they recovered the lost vegetation, halted the erosion and even changed the course of rivers.…
The Wildlife Services has been around for a very long time, death has been following them for over 100 years. “Animal Damage Control [now Wildlife Services] began in 1886… it began killing predators in 1914 and has continued to do so ever since” (“USDA’s War”). Each year the organization releases the number of animals they have killed; the amount is staggering. John Myers explained, “The 2.7 million total, released earlier this month, was down from more than 3 million in 2015 and about the same as 2014, agency records show”.…
Roland Smith was born November 30, 1951 in Portland, Oregon. Roland claims ever since he was little he has always loved “the sound of the keyboard and the look of the letters and words that eventually turn into stories”. When Smith was 5 years old his parents gave him a keyboard. This keyboard was the best present he had ever received little did he know that this one small gift would later lead him being a bestselling author of children and young adult books.…
For example, when sea otters sleep, they float on their backs wrapped in seaweed so they do not float away while sleeping (Canadian Wildlife Federation). Sea otters can reach a speed of about 0.9mph while swimming on the surface and about 5.6mph under water (seaworld). With sea otters being able to swim so well, sea otters can swim rapidly to get away from prey. In order to survive a sea otter life, the main thing for survival is eating. For sea otters to get food they swim or dive down about 66ft under water and can stay submerged for about 52-90 seconds…
This organism can be found along the shores of the Chesapeake Bay and throughout lakes, streams, and almost anywhere. The organism is most commonly known as the common otter, North American river otter or scientifically known as Lontra Canadensis. The Northern river otter has a dark brown fur wither lighter brown along the face and belly. They have thick fur to help them keep warm while swimming in cold waters to catch fish. Their webbed feet allows them to swim faster in the water and they also can run speeds up to 15 miles per hour with relatively short legs on land.…
According to professor, the sea otters are decline by predators because the predators pray on sea otters that is the reason the population of sea otter decline and we also find a seldom of dead sea otters…
Status: Threatened Conservation Efforts: Currently humans use great egret feathers in clothing and accessories, which has lead to a decline of populations. The CESA makes it illegal to import, export, “take”, possess, purchase, sell, or attempt to do any of those actions to species that are designated as threatened, endangered. “take” is defined as “hunt, pursue, catch, capture, or kill, or attempt to hunt, pursue, catch, capture, or kill.” Physical Description: The great egret is a tall, long-legged bird that has a curved neck and a short tail. It has a long yellowish-orange beak, flawless white feathers and bold black long,skinny legs.…
General habitat requirements The Amazon River Dolphin lives only in freshwater, and are mostly found throughout the Amazon River and the Orinoco River. Some of these Dolphins have even been spotted in different places in South America, including Bolivia, Brazil, Colombia, Ecuador, Guyana, Perú and Venezuela. The Boto finds its shelter throughout the Amazon River and Orinoco River. The more murky the water is, the more likely a pink Dolphin will be traveling around.…
Behavior Typically, Lontra Longicaudis are solitary species. In Uruguay it’s seen that they have a small group, in addition they breed during the spring time and more frequent in the winter. The communication they have between its own species are a scent marking called sprainting. This behavior is seen as coordination of sexual activity.…