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In a study of 2,588 slaves in 1860 by the economist Richard Sutch, he found that on slave-holdings with at least one woman, the average ratio of women to men exceeded 2:1. The imbalance was greater in the "selling states", [clarification needed] where the excess of women over men was 300 per thousand. [clarification needed] [14]
Dog breeding is the practice of mating selected dogs with the intention of maintaining or producing specific qualities and characteristics. When dogs reproduce without such human intervention, their offspring's characteristics are determined by natural selection , while "dog breeding" refers specifically to the artificial selection of dogs, in ...
Cowboys: A Documentary Portrait is a 2019 documentary film directed by Bud Force and John Langmore. [1] The feature-length movie gives viewers a glimpse into the lives of modern working cowboys on America's largest and most remote cattle ranches - some of which are over one million acres and still require full crews of horseback mounted men and women to tend large herds of cattle.
The English word cowboy has an origin from several earlier terms that referred to both age and to cattle or cattle-tending work. The English word cowboy was derived from vaquero, a Spanish word for an individual who managed cattle while mounted on horseback. Vaquero was derived from vaca, meaning "cow", [3] which came from the Latin word vacca.
Animal breeding is a branch of animal science that addresses the evaluation (using best linear unbiased prediction and other methods) of the genetic value (estimated breeding value, EBV) of livestock. Selecting for breeding animals with superior EBV in growth rate, egg, meat, milk, or wool production, or with other desirable traits has ...
Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.
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A group of Labradoodle assistance dogs. This is a list of common dog crossbreeds.These are crossbreed dogs created deliberately by crossing two purebred dogs.Some are known as designer dogs and are bred as companion dogs, often given portmanteau names derived from those of the parent breeds; others are bred to combine specific working qualities inherent in the parent breeds.