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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 ...
The Welsh Harlequin is a breed of domestic duck originating in Wales. In 1949, in Criccieth, Group Captain Leslie Bonnet discovered a colour mutation among his flock of Khaki Campbells and began selective breeding for the trait. By 1968, hatching eggs were exported to the United States, followed by the importation of live birds in 1981. [1]: 199.
The down of birds is a layer of fine feathers found under the tougher exterior feathers. Very young birds are clad only in down. Powder down is a specialized type of down found only in a few groups of birds. Down is a fine thermal insulator and padding, used in goods such as jackets, bedding (duvets and featherbeds), pillows and sleeping bags.
Domestic duck. Domestic ducks (mainly mallard, Anas platyrhynchos domesticus, with some Muscovy ducks, Cairina moschata domestica) are ducks that have been domesticated and raised for meat and eggs. A few are kept for show, or for their ornamental value. Most varieties of domesticated ducks, apart from the Muscovy duck and hybrids, are ...
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.