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Dungeness Crab In Puget Sound
The Dungeness crab in the Puget Sound, Washington state is a non-genetically distinct population of Dungeness crab, Dungeness that has been experiencing severely declining populations in the south sound region since 2013.The Washington Department of Fish and Wildlife (2020-03-11).WDFW works to manage and restore Dungeness Crab in Washington waters. ''Medium''. The cause of the decline is unknown, although it has been determined not to be due to overfishing.Friedrich, Ed (2023-06-22).State keeps South Sound closed to crabbing for sixth summer. ''Gig Harbor Now''. As crabbing seasons remain closed or severely limited throughout the south sound region, research is focused primarily on larvae in order to predict future population size and study genetics.Larval Crab Monitoring . ''Pacific Northwest Crab Researc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsatellite
A microsatellite is a tract of repetitive DNA in which certain DNA motifs (ranging in length from one to six or more base pairs) are repeated, typically 5–50 times. Microsatellites occur at thousands of locations within an organism's genome. They have a higher mutation rate than other areas of DNA leading to high genetic diversity. Microsatellites are often referred to as short tandem repeats (STRs) by forensic geneticists and in genetic genealogy, or as simple sequence repeats (SSRs) by plant geneticists. Microsatellites and their longer cousins, the minisatellites, together are classified as VNTR (variable number of tandem repeats) DNA. The name "satellite" DNA refers to the early observation that centrifugation of genomic DNA in a test tube separates a prominent layer of bulk DNA from accompanying "satellite" layers of repetitive DNA. They are widely used for DNA profiling in cancer diagnosis, in kinship analysis (especially paternity testing) and in forensic iden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wikipedia Student Program
Wikipedia is a multilingual free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and using a wiki-based editing system. Wikipedia is the largest and most-read reference work in history. It is consistently one of the 10 most popular websites ranked by Similarweb and formerly Alexa; Wikipedia was ranked the 5th most popular site in the world. It is hosted by the Wikimedia Foundation, an American non-profit organization funded mainly through donations. Wikipedia was launched by Jimmy Wales and Larry Sanger on January 15, 2001. Sanger coined its name as a blend of ''wiki'' and ''encyclopedia''. Wales was influenced by the "spontaneous order" ideas associated with Friedrich Hayek and the Austrian School of economics after being exposed to these ideas by the libertarian economist Mark Thornton. Initially available only in English, versions in other languages were quickly developed. Its combined edition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horseshoe Bay, West Vancouver
Horseshoe Bay ( Sḵwx̱wú7mesh: Ch'ax̱áy̓, ) is a community of about 1,000 permanent residents, located in West Vancouver, in the Canadian province of British Columbia. Situated on the western tip of West Vancouver at the entrance to Howe Sound, the village marks the western end of Highway 1 on mainland British Columbia (and furthermore the main route of the Trans-Canada Highway on the Canadian mainland). It also serves as the southern end of the Sea-to-Sky Highway, with Lions Bay just 15 minutes north. Horseshoe Bay is the location of the third-busiest BC Ferries terminal, the Horseshoe Bay ferry terminal. Because of the presence of the ferry terminal, it is considered a control city on the Upper Levels Highway westbound. Gallery File:Horseshoe Bay, BC.jpg, Boats at Horseshoe Bay. File:Horshbay-mtns.jpg, Boats at Horseshoe Bay, with Howe Sound Howe Sound (french: Baie (de /d')Howe, squ, Átl'ka7tsem, Nexwnéwu7ts, Txwnéwu7ts) is a roughly triangular sound, that j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whidbey Island
Whidbey Island (historical spellings Whidby, Whitbey, or Whitby) is the largest of the islands composing Island County, Washington, in the United States, and the largest island in Washington State. (The other large island is Camano Island, east of Whidbey.) Whidbey is about north of Seattle, and lies between the Olympic Peninsula and the I-5 corridor of western Washington. The island forms the northern boundary of Puget Sound. It is home to Naval Air Station Whidbey Island. The state parks and natural forests are home to numerous old growth trees. According to the 2000 census, Whidbey Island was home to 67,000 residents with an estimated 29,000 of those living in rural locations. This increased slightly to 69,480 residents as of the 2010 census. Whidbey Island is approximately from north to south, and wide, with a total land area of , making it the 40th largest island in the United States. It is ranked as the fourth longest and fourth largest island in the contiguo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swinomish People
The Swinomish are an historically Lushootseed-speaking Native American people in western Washington state in the United States. The Tribe lives in the southeastern part of Fidalgo Island in northern Puget Sound, near the San Juan Islands, in Skagit County, Washington. Skagit County is located about north of Seattle. Swinomish people are enrolled in the federally recognized Swinomish Indian Tribal Community, also known as the Swinomish Tribe, which is headquartered in Swinomish Village, across the Swinomish Channel from La Conner. Language The Swinomish people speak a dialect of the Salishan Lushootseed language. Culture The lifestyle of the Swinomish, like many Northwest Coast indigenous peoples, involves the fishing of salmon and collecting of shellfish. They reserved the right to fish and harvest in their usual and accustomed areas in the Point Elliott Treaty of 1855. History The Swinomish moved onto reservation lands after the signing of the Point Elliott Treaty in 185 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diel Vertical Migration
Diel vertical migration (DVM), also known as diurnal vertical migration, is a pattern of movement used by some organisms, such as copepods, living in the ocean and in lakes. The word ''diel'' comes from the Latin ''dies'' day, and means a 24-hour period. The migration occurs when organisms move up to the uppermost layer of the sea at night and return to the bottom of the daylight zone of the oceans or to the dense, bottom layer of lakes during the day. It is important to the functioning of deep-sea food webs and the biologically driven sequestration of carbon. In terms of biomass, it is the largest synchronous migration in the world. It is not restricted to any one taxon as examples are known from crustaceans (copepods), molluscs ( squid), and ray-finned fishes (trout). The phenomenon may be advantageous for a number of reasons, most typically to access food and avoid predators. It is triggered by various stimuli, the most prominent being response to changes in ligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salish Sea
, image = PNW-straits.jpg , alt = , caption = The Salish Sea, showing the open Pacific Ocean at lower left, and from there, heading inland: the Strait of Juan de Fuca, the narrow Puget Sound at lower right, and the wide Strait of Georgia at upper center. Sediment from the Fraser River is visible as a greenish plume in the Strait of Georgia. , image_bathymetry = , alt_bathymetry = , caption_bathymetry = , location = British Columbia and Washington , group = , coordinates = , type = , etymology = , part_of = , inflow = , rivers = Fraser, Nisqually, Nooksack, Puyallup, Skagit, Snohomish and Squamish Rivers , outflow = , oceans = Pacific Ocean , catchment = [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cancer Productus
''Cancer productus'', one of several species known as red rock crabs, is a crab of the genus ''Cancer'' found on the western coast of North America. This species is commonly nicknamed the Pearl of the Pacific Northwest. Description ''Cancer productus'' has carapace teeth that are somewhat broad and rounded with teeth between the eyes of nearly equal size and shape. The carapace of ''C. productus'' is widest at the posterior-most tooth, up to 20.0 cm wide. The pincers are large with distinctive black tips. This species lacks serrations or projections on the ventral side of the claws. Adults have a brick-red coloration throughout. The coloration of juveniles is diverse, often white, sometimes with red spots, or zebra-striped. Similar species Dungeness crab (''Metacarcinus magister'') has serrations on the dorsal side of the chelipeds and lacks black tips. The graceful rock crab ('' Metacarcinus gracilis'') has a single projection on the dorsal side of the chelipeds an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gene Flow
In population genetics, gene flow (also known as gene migration or geneflow and allele flow) is the transfer of genetic material from one population to another. If the rate of gene flow is high enough, then two populations will have equivalent allele frequencies and therefore can be considered a single effective population. It has been shown that it takes only "one migrant per generation" to prevent populations from diverging due to drift. Populations can diverge due to selection even when they are exchanging alleles, if the selection pressure is strong enough. Gene flow is an important mechanism for transferring genetic diversity among populations. Migrants change the distribution of genetic diversity among populations, by modifying allele frequencies (the proportion of members carrying a particular variant of a gene). High rates of gene flow can reduce the genetic differentiation between the two groups, increasing homogeneity. For this reason, gene flow has been thought ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tree Network
A tree topology, or star-bus topology, is a hybrid network topology in which star networks are interconnected via bus networks. Tree networks are hierarchical, and each node In general, a node is a localized swelling (a "knot") or a point of intersection (a vertex). Node may refer to: In mathematics * Vertex (graph theory), a vertex in a mathematical graph * Vertex (geometry), a point where two or more curves, line ... can have an arbitrary number of child nodes. Regular tree networks A regular tree network's topology is characterized by two parameters: the branching, d, and the number of generations, G. The total number of the nodes, N, and the number of peripheral nodes N_p, are given by : N= \frac,\quad N_p=d^G Random tree networks Three parameters are crucial in determining the statistics of random tree networks, first, the branching probability, second the maximum number of allowed progenies at each branching point, and third the maximum number of generatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hardy–Weinberg Principle
In population genetics, the Hardy–Weinberg principle, also known as the Hardy–Weinberg equilibrium, model, theorem, or law, states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences. These influences include ''genetic drift'', ''mate choice'', ''assortative mating'', ''natural selection'', ''sexual selection'', ''mutation'', ''gene flow'', '' meiotic drive'', '' genetic hitchhiking'', ''population bottleneck'', ''founder effect,'' ''inbreeding and outbreeding depression''. In the simplest case of a single locus with two alleles denoted ''A'' and ''a'' with frequencies and , respectively, the expected genotype frequencies under random mating are for the AA homozygotes, for the aa homozygotes, and for the heterozygotes. In the absence of selection, mutation, genetic drift, or other forces, allele frequencies ''p'' and ''q'' are constant between generations, so equilibrium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
