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Hexagenia Bilineata
''Hexagenia bilineata'' is a species of mayfly in the family Ephemeridae. It is native to North America where it is found in the Upper Mississippi Valley. Sometimes adults of this mayfly are so abundant as to cause a nuisance because of their enormous numbers. The larvae are aquatic and burrow in mud and the adult insects have brief lives. Description When the adults are ready to emerge, the mayfly nymphs (larvae) swim to the surface of the water during the night. Their skin splits and winged subimagos struggle free, usually in less than a minute, and fly to nearby trees to rest. They are a dull gray color and have short, coarse legs, bristly cerci and cloudy, grayish wings. Some eight to eighteen hours later, these subimagos moult into mature adults (imagos). These are altogether more delicate in appearance than the subimagos; the wings are transparent, the legs are longer and more slender, the cerci lack bristles, the eyes are larger and the body is patterned in brown and cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Say
Thomas Say (June 27, 1787 – October 10, 1834) was an American entomologist, conchologist, and Herpetology, herpetologist. His studies of insects and shells, numerous contributions to scientific journals, and scientific expeditions to Florida, Georgia, the Rocky Mountains, Mexico, and elsewhere made him an internationally known naturalist. Say has been called the father of American descriptive entomology and American conchology. He served as librarian for the Academy of Natural Sciences of Philadelphia, curator at the American Philosophical Society (elected in 1817), and professor of natural history at the University of Pennsylvania. Early life and education Born in Philadelphia into a prominent Religious Society of Friends, Quaker family, Thomas Say was the great-grandson of John Bartram, and the great-nephew of William Bartram. His father, Dr. Benjamin Say, was brother-in-law to another Bartram son, Moses Bartram. The Say family had a house, "The Cliffs" at Gray's Ferry Bridge, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kentucky Lake
Kentucky Lake is a major navigable river, navigable reservoir along the Tennessee River in Kentucky and Tennessee. It was created in 1944 by the Tennessee Valley Authority's impounding of the Tennessee River via Kentucky Dam for flood control and hydroelectric power. The lake is the largest artificial lake by surface area in the United States east of the Mississippi River, with of shoreline. Kentucky Lake has a flood storage capacity of , more than 2.5 times the next largest lake in the TVA system. It provides a source for hydroelectricity, hydro-electric power. Also, as one of the lakes alluded to by the name of Land Between The Lakes National Recreation Area, it is a recreational destination of western Kentucky and Tennessee. Recreation The lake is a desirable fishing area. Records for the largest of three species of fish ever taken in Kentucky have been set at this lake: white bass (), Buffalo carp (), and yellow perch (). It is also the major attraction for two List of Ke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insects Of Canada
Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, Thorax (insect anatomy), thorax and abdomen (insect anatomy), abdomen), three pairs of jointed Arthropod leg, legs, compound eyes, and a pair of antenna (biology), antennae. Insects are the most diverse group of animals, with more than a million described species; they represent more than half of all animal species. The insect nervous system consists of a insect brain, brain and a ventral nerve cord. Most insects reproduce Oviparous, by laying eggs. Insects Respiratory system of insects, breathe air through a system of Spiracle (arthropods), paired openings along their sides, connected to Trachea#Invertebrates, small tubes that take air directly to the tissues. The blood therefore does not carry oxygen; it is only partly contained in ves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mayflies
Mayflies (also known as shadflies or fishflies in Canada and the upper Midwestern United States, as Canadian soldiers in the American Great Lakes region, and as up-winged flies in the United Kingdom) are aquatic insects belonging to the order (biology), order Ephemeroptera. This order is part of an ancient group of insects termed the Palaeoptera, which also contains dragonflies and damselflies. Over 3,000 species of mayfly are known worldwide, grouped into over 400 genera in 42 family (biology), families. Mayflies have ancestral traits that were probably present in the first flying insects, such as long tails and Insect wing, wings that do not fold flat over the insect morphology#Abdomen, abdomen. Their immature stages are aquatic fresh water forms (called "naiads" or "nymph (biology), nymphs"), whose presence indicates a clean, unpolluted and highly oxygenated aquatic environment. They are unique among insect orders in having a fully winged terrestrial preadult stage, the sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trenton, Pierce County, Wisconsin
Trenton is a town in Pierce County, Wisconsin. The population was 1,737 at the time of the 2000 census. The unincorporated communities of Hager City, North Red Wing, Pucketville, and Trenton are located in the town. The unincorporated communities of Moeville and Snows Corner are also located partially in the town. Geography According to the United States Census Bureau, the town covers a total area of 30.2 square miles (78.1 km2). 28.1 square miles (72.8 km2) of it is land and 2.0 square miles (5.3 km2) of it (6.80%) is water. Demographics As of the census of 2000, there were 1,737 people, 647 households, and 500 families residing in the town. The population density was . There were 671 housing units at an average density of . The racial makeup of the town was 98.79% White, 0.17% African American, 0.29% Native American, 0.12% Asian, 0.12% from other races, and 0.52% from two or more races. Hispanic or Latino of any race were 0.81% of the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weather Radar
A weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation (meteorology), precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.). Modern weather radars are mostly pulse-Doppler radars, capable of detecting the motion of rain droplets in addition to the intensity of the precipitation. Both types of data can be analyzed to determine the structure of storms and their potential to cause severe weather. During Radar in World War II, World War II, radar operators discovered that weather was causing echoes on their screens, masking potential enemy targets. Techniques were developed to filter them, but scientists began to study the phenomenon. Soon after the war, military surplus, surplus radars were used to detect precipitation. Since then, weather radar has evolved and is used by national weather services, research departments in universities, and in television stations' weather d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Crosse, Wisconsin
La Crosse ( ) is a city in La Crosse County, Wisconsin, United States, and its county seat. Positioned alongside the Mississippi River, La Crosse is the largest city on Wisconsin's western border. La Crosse's population was 52,680 as of the 2020 United States census, 2020 census. The city forms the core of the La Crosse–Onalaska, La Crosse–Onalaska metropolitan area, which includes all of La Crosse County and Houston County, Minnesota, with a population of 139,627. La Crosse's economy serves as a regional educational, medical, manufacturing, and transportation hub for Western Wisconsin producing a List of cities by GDP, gross domestic product (GDP) of $9.7 billion as of 2022. The city is a college town with nearly 20,000 students and is home to the University of Wisconsin–La Crosse, Viterbo University, and Western Technical College. Furthermore, the La Crosse area is home to the headquarters or regional offices of Kwik Trip, Organic Valley, Mayo Clinic, Gundersen Health ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barge
A barge is typically a flat-bottomed boat, flat-bottomed vessel which does not have its own means of mechanical propulsion. Original use was on inland waterways, while modern use is on both inland and ocean, marine water environments. The first modern barges were pulled by tugs, but on inland waterways, most are pushed by Pusher (boat), pusher boats, or other vessels. The term ''barge'' has a rich history, and therefore there are many types of barges. History of the barge Etymology ''Barge'' is attested from 1300, from Old French ''barge'', from Vulgar Latin ''barga''. The word originally could refer to any small boat; the modern meaning arose around 1480. ''Bark'' "small ship" is attested from 1420, from Old French ''barque'', from Vulgar Latin ''barca'' (400 AD). A more precise meaning (see Barque) arose in the 17th century and often takes the French spelling for disambiguation. Both are probably derived from the Latin ''barica'', from Greek language, Greek ''baris'' "Eg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pusher (boat)
A pusher, pusher craft, pusher boat, pusher tug, or towboat, is a boat designed for pushing barges or car floats. In the United States, the industries that use these vessels refer to them as towboats. These vessels are characterized by a square bow and a shallow draft, and they typically have knees, which are large plates mounted to the bow for pushing barges of various heights. These boats usually operate on rivers and inland waterways. Multiple barges lashed together, or a boat and any barges lashed to it, are referred to as a ''tow'' and can have dozens of barges. Many of these vessels, especially the long-haul boats, include living quarters for the crew. Size Towboat engine outputs range from less than up to . Most towboats are from long, and wide. Smaller boats are used in harbors, fleeting areas and around locks while larger boats operate in "line-haul" operations over long distances and between major ports. In the United States, south of the Chain of Rocks Lock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Des Moines Register
''The Des Moines Register'' is the daily morning newspaper of Des Moines, Iowa, United States. History Early period The first newspaper in Des Moines was the ''Iowa Star''. In July 1849, Barlow Granger began the paper in an abandoned log cabin by the junction of the Des Moines and Raccoon River. In 1854, ''The Star'' became the ''Iowa Statesman'' which was also a Democratic paper. In 1857, ''The Statesman'' became the ''Iowa State Journal'', which published three times per week. In 1870, ''The Iowa State Journal'' became the ''Iowa State Leader'' as a Democratic newspaper, which competed with pro- Republican ''Iowa Daily State Register'' for the next 32 years. In 1902, George Roberts bought the ''Register'' and ''Leader'' and merged them into a morning newspaper. In 1903, Des Moines banker Gardner Cowles, Sr. purchased the ''Register and Leader''. The name finally became ''The Des Moines Register'' in 1915. (Cowles also acquired the '' Des Moines Tribune'' in 1908. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voltinism
Voltinism is a term used in biology to indicate the number of broods or generations of an organism in a year. The term is most often applied to insects, and is particularly in use in sericulture, where silkworm varieties vary in their voltinism. * Univoltine (monovoltine) – (adjective) referring to organisms having one brood or generation per year * Bivoltine (divoltine) – (adjective) referring to organisms having two broods or generations per year *Trivoltine – (adjective) referring to organisms having three broods or generations per year * Multivoltine (polyvoltine) – (adjective) referring to organisms having more than two broods or generations per year * Semivoltine – There are two meanings: :* (''biology'') Less than univoltine; having a brood or generation less often than once per year :* or (adjective) referring to organisms whose generation time is more than one year. Examples The speckled wood butterfly is univoltine in the northern part of its range, e.g. nort ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biological Life Cycle
In biology, a biological life cycle (or just life cycle when the biological context is clear) is a series of stages of the life of an organism, that begins as a zygote, often in an egg, and concludes as an adult that reproduces, producing an offspring in the form of a new zygote which then itself goes through the same series of stages, the process repeating in a cyclic fashion. "The concept is closely related to those of the life history, Developmental biology, development and ontogeny, but differs from them in stressing renewal." Transitions of form may involve growth, asexual reproduction, or sexual reproduction. In some organisms, different "generations" of the species succeed each other during the life cycle. For Embryophyte, plants and many algae, there are two multicellular stages, and the life cycle is referred to as alternation of generations. The term life history is often used, particularly for organisms such as the red algae which have three multicellular stages (or mor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
