If a lake is cut from the ocean and has no large fish as predators (only dragonflies), then the sticklebacks will have a better chance at surviving and reproducing because the sticklebacks will be better adapted to the environment (presence/absence of a pelvic bone) and have little to no predators. The hypothesis was supported. Before the experiment started, background knowledge was collected to better the knowledge of the lakes. Bear Paw Lake is an enclosed lake, meaning no predators could get into the lake.
Introduction The Spotted Owl (Strix occidentalis) is an endangered species that lives in the old growth forests of the Pacific Northwest. This species is declinging in numbers drastically and has been listed on the ESA since 1990. The spotted owl is native to the Pacific Northwest. They are found in Southern parts of Columbia, North Western America, and California. As a result of declining habitat, there are fewer than 100 pairs of Northern spotted owls in British Columbia, Canada, 1,200 pairs in Oregon, 560 pairs in northern California and 500 pairs in the state of Washington.
Introduction Northern Bobwhite Quail (Colinus virginianus) are one of the most influential and important game animals in America. Their popularity has been the driving force behind conservation, research, and even local economic prosperity. The hunting associated with these birds has become a “southern tradition” since these hunts are typically social events. Currently the bobwhite quail is undergoing a long term population decline which has prompted even more conservation efforts and research. Bobwhite quail are extremely sensitive to habitat quality which has recently been used to promote conservation based land management practices.
The Native Americans of the North West Coast region adapted to their environment with the uses of fish, trees, and animal hides. The Native Americans of the North West Coast used fish as their main food resource. They made their house close to beaches and bays because it was faster to capture the fish. Fish was used more than any other food source Because it’s easier than any other food.
The United States of America abounds with beautiful scenery, amazing natural resources, and fascinating animals. Each state can boast of its unique natural resources. The state of Alaska provides an abundant habitat for numerous species of mammals, fish, and birds.
“A 20-year monitoring plan was developed in 2009. While the birds are no longer protected under the federal endangered species act, they continue to be protected under other federal laws.” (Murray). Many people see that bald eagle as a majestic bird which is why seeing one a Swartswood Lake is very eventful for most people. “Swartswood is known for its great fishing and peaceful surroundings.
Bald eagles are known as the symbol of America, but they are also a symbol of adventure. In Yellowstone there are currently eighteen active nest. Female bald eagles are larger than their male counterparts, and they both have dark feathers and white heads. Juvenile bald eagles often have lighter colored feathers. Bald eagles nest is tall trees located near a water source, and during the spring and summer months they hunt waterfowl and fish. The winter months test the eagles’ survival. Bald eagles feed on animal carcasses during the harsh winters of Yellowstone. Bald eagles form life long bonds and lay two to three eggs a year that hatch in the spring. Yellowstone’s bald eagles stay in the park year round (Nat'l Park Service U.S Dept. of the
The author states that the pollution hypothesis seemed the most likely cause of otters decline along the Alaskan coast and provides three reasons. In contrast, the professor states that the ongiong investigation show that the predation theory is mst likely the cause of the decline and sh.e opposes each of the author 's reasons First, the reading claims that there were known sources of pollution along the Alaskan coast. However, the professor refutes this pint by saying that the pollution theory is weakened by that no dead sea otters were washed up to the shore. She said thet if the infection is the cause of the decline, there should be a lot of killed otters washed up, so this fact is consistent with the predation theory because if the sear otters were killedby predetors, they would not wash up to the shore.
Four million birds are estimated to use the Sea each day in the winter, more than any other resource in the nation” (DesertUSA, The Salton Sea, CA). Some rare birds that can be seen on special occasion are Bald Eagles, White Ibises, Pine Warblers, Red Crossbills, and over fifty other rarities. Some common birds are: killdeer, Caspian terns, American Avocets, Great Egrets, burrowing owls, Black-necked stilts, and Black skimmers (5). One species, the Yuma Clapper rail, relies heavily on the survival of the Salton Sea because around 40% of all Yuma Clapper rails in the United States live in the basin. These birds were listed as endangered on March 11, 1967 and also rely on the basin for crayfish to eat.
In the dirt habitat, the population of fork and knifes began to decrease while the population of spoons began to increase. For instance, in generation 2, forks accounted for 33% of the population, knives had become extinct and spoons accounted for 67% of the population. Additionally in generation 3, the total population was made up of spoons, both knives and forks had become extinct (Table 1A). As for predators in the dirt habitat, the population of pinto bean decreased during the second generation, while the populations of black beans, green beans and white beans slightly increased.
While otters are considered secure globally, the southwestern stock in Alaska is threatened. According to Alaska's Department of Fish and Game, http://www.adfg.alaska.gov/index.cfm?adfg=seaotter.main "in southwest Alaska, sea otters have experienced a sharp population decline in the last 20 years," while the Southeast and Southcentral stocks have stabilized or increased. In an email exchange with Webber, he told me that the otters washing up were assumed to be non-threatened Southcentral northern sea otters because of the location of where they came ashore. Otters have a unique history in Alaska. They bounced back from the fur trade, that began in the 1700s, that almost wiped them out.