Salmon run

The Effects of Hatcheries on Wild Salmon Populations Salmonids are perhaps one of the most prominent fish in freshwater systems such as streams and lakes. Their success can be widely attributed to their anadromous lifestyle. However, despite their success, salmonid populations are on a continuous decline. Many species such as Pacific Salmon in Washington, Oregon, and California are critically endangered, while some are threatened with extinction due to several different factors (Moyle and Cech…

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…

The steelhead trout used to be a native species to the Arroyo Del Valle in Pleasanton, California. Some are anadromous fish (i.e. they spend most of their time in freshwater developing after they hatch and then spend part of their later life in the sea or ocean) but others will remain in a freshwater stream or creek their entire lives. Typically, anadromous populations swim up the creek in winter to lay their eggs and then swim back, leaving the eggs to develop on their own. In order to lay…

Evolution is a very complex process that can occur over millions of years, as well as right now at this very moment. The articles “12 Examples of Evolution Happening Right Now” by Erin Brodwin showcases a few of the ways that evolution is happening all around, all the time. “A Possible Break in One of Evolution’s Biggest Mysteries” by Peter Brannen, is riveting in the language it uses when explaining one of the largest phenomena of evolution – whales. Both of these articles provide reliable…

Salmon Depletion In the 1950’s the salmon population in Idaho had numbers over one hundred thousand. Ever since then, despite the efforts of hatcheries,the population of salmon has dropped drastically. Even though at one point wild salmon thrived in their natural habitat, they were at one point even put on the endangered species list to try and bring back their numbers. Many factors may have played in this rapid decline of fish, some may include over harvesting, habitat loss, and the increase…

Would we really want to lose the iconic Monarch butterfly? Your children love their display in most zoo exhibits, as well as chasing their flight patterns in your local parks. They are great pollinators. They also grace us with their gorgeous annual migration to the south during the late summer/autumn (Monarch Butterfly, 1999). By continuing forward with Genetic Modification, losing all that is one of the potential risks. If the pollen from a plant or tree could cause the Monarch caterpillar to…

diverse number of trout species spread across three different families of fish. Trout is closely related to both saltwater and freshwater salmon. Brown trout, not indigenous to the United States and common in the small, warm streams of northeastern, northwestern and central United States is related to the Atlantic salmon. Other close relatives of the sockeye salmon are the…

.Different types of fish in Minnesota. In the article titled “fish facts,” it says “The northern pike is an aggressive predator fish found throughout Minnesota in lakes, ponds, and rivers,” northern pikes are daytime feeders that mostly feed on other fish. Most anglers are now saying that their favorite type of fish to catch is the largemouth bass. (Tomeelleri Paragraph # 23). They are fun to catch because they attack the lure and they leap out of the water. The largemouth bass is found in…

When I try to recall my earliest science experiences, the furthest I can go back is to the second grade. I feel as though I can only recall back to the second grade is because the majority of my early childhood was spent reading children’s books. I learned how to read at a very young age, so instead of focusing my energy on science topics, I poured all of my energy into reading the children’s books and chapter books that were laying around my house. What I remember from the second grade is the…

Salmon fishing has always been a semi-reliant source of food for natives in all parts of Alaska for centuries. The prosperity of the salmon in these areas has been necessary to the survival and prosperity of Alaska 's ancient and current inhabitants. The debate on salmon in this reason is often surrounding two main questions: Why are the salmon populations flourishing, and why are they not in other areas of the united states. These questions and more can be answered not by looking at current…