Animal husbandry in the British Agricultural Revolution of the 18th century, when livestock breeds like the Dishley Longhorn cattle and Lincoln Longwool sheep were rapidly improved by agriculturalists such as Robert Bakewell to yield more meat, milk, and wool. A wide range of other species such as horse, water buffalo, llama, rabbit and guinea pig are used as livestock in some parts of the world. Insect farming, as well as aquaculture of fish, molluscs, and crustaceans, is widespread. Modern animal husbandry relies on production systems adapted to the type of land available. Subsistence farming is being superseded by intensive animal farming in
Animal genetic resources for food and agriculture also currently shrinking, with rapid and uncontrolled loss of breeds and conjointly their often uncharacterized genes. Nearly 100 livestock breeds have gone extinct between 2000 and 2014. With the loss of these breeds comes the loss of their unique adaptive traits, which are often under the control of many different genes and complex interactions between the genotype and the environment. In order to protect these unique traits, and the diversity they allow, collaborative global efforts towards the characterization and management of these genetic resources must be made. Unlike plants, which can be easily conserved in seed banks, a large portion