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The Pekin or White Pekin is an American breed of domestic duck, raised primarily for meat. [6][7] It derives from birds brought to the United States from China in the nineteenth century, [8] and is now bred in many parts of the world. [6] It is often known as the American Pekin to distinguish it from the German Pekin, a distinct and separate ...
Broodstock, or broodfish, are a group of mature individuals used in aquaculture for breeding purposes. Broodstock can be a population of animals maintained in captivity as a source of replacement for, or enhancement of, seed and fry numbers. [1] These are generally kept in ponds or tanks in which environmental conditions such as photoperiod ...
9780670451494. OCLC. 192241. Make Way for Ducklings is an American children's picture book written and illustrated by Robert McCloskey. First published in 1941 by the Viking Press, the book centers on a pair of mallards who raise their brood of ducklings on an island in the lagoon in the Boston Public Garden. It won the 1942 Caldecott Medal for ...
Broodiness is the action or behavioral tendency to sit on a clutch of eggs to incubate them, often requiring the non-expression of many other behaviors including feeding and drinking. [1] Being broody has been defined as "Being in a state of readiness to brood eggs that is characterized by cessation of laying and by marked changes in behavior ...
Annotated skew-T log-P diagram. A skew-T log-P diagram is one of four thermodynamic diagrams commonly used in weather analysis and forecasting. In 1947, N. Herlofson proposed a modification to the emagram that allows straight, horizontal isobars and provides for a large angle between isotherms and dry adiabats, similar to that in the tephigram.
Poultry farming is the form of animal husbandry which raises domesticated birds such as chickens, ducks, turkeys and geese to produce meat or eggs for food. Poultry – mostly chickens – are farmed in great numbers.
Bryde's whale (/ ˈbrʊdəz / BRUU-dəz), [3][4] or the Bryde's whale complex, putatively comprises three species of rorqual and maybe four. The "complex" means the number and classification remains unclear because of a lack of definitive information and research. The common Bryde's whale (Balaenoptera brydei, Olsen, 1913) is a larger form that ...
Geothermal gradient is the rate of change in temperature with respect to increasing depth in Earth 's interior. As a general rule, the crust temperature rises with depth due to the heat flow from the much hotter mantle; away from tectonic plate boundaries, temperature rises in about 25–30 °C/km (72–87 °F/mi) of depth near the surface in ...