Livestock

Cattle on a pasture in Germany

Livestock are domesticated animals raised in an agricultural setting to produce labor and commodities such as meat, eggs, milk, fur, leather, and wool. The term is sometimes used to refer solely to those that are bred for consumption, while other times it refers only to farmed ruminants, such as cattle and goats.[1]

In recent years, some organizations have also raised livestock to promote the survival of rare breeds. The breeding, maintenance, and slaughter of these animals, known as animal husbandry, is a component of modern agriculture that has been practiced in many cultures since humanity's transition to farming from hunter-gatherer lifestyles.

Animal husbandry practices have varied widely across cultures and time periods. Originally, livestock were not confined by fences or enclosures, but these practices have largely shifted to intensive animal farming, sometimes referred to as "factory farming". Now, over 99% of livestock are raised on factory farms.[2] These practices increase yield of the various commercial outputs, but have also led to negative impacts on animal welfare and the environment. Livestock production continues to play a major economic and cultural role in numerous rural communities.

Etymology

This Australian road sign uses the less common term "stock" for livestock.

Livestock as a word was first used between 1650 and 1660, as a merger between the words "live" and "stock".[3] In some periods, "cattle" and "livestock" have been used interchangeably. Today, the modern meaning of cattle is domesticated bovines, while livestock has a wider sense.[4]

United States federal legislation defines the term to make specified agricultural commodities eligible or ineligible for a program or activity. For example, the Livestock Mandatory Reporting Act of 1999 (P.L. 106-78, Title IX) defines livestock only as cattle, swine, and sheep, while the 1988 disaster assistance legislation defined the term as "cattle, sheep, goats, swine, poultry (including egg-producing poultry), equine animals used for food or in the production of food, fish used for food, and other animals designated by the Secretary."[5]

Deadstock is defined in contradistinction to livestock as "animals that have died before slaughter, sometimes from illness". It is illegal in many countries, such as Canada, to sell or process meat from dead animals for human consumption.[6]

History

Animal-rearing originated during the cultural transition to settled farming communities from hunter-gatherer lifestyles. Animals are domesticated when their breeding and living conditions are controlled by humans. Over time, the collective behaviour, lifecycle and physiology of livestock have changed radically. Many modern farm animals are unsuited to life in the wild.

The dog was domesticated early; dogs appear in Europe and the Far East from about 15,000 years ago.[7] Goats and sheep were domesticated in multiple events sometime between 11,000 and 5,000 years ago in Southwest Asia.[8] Pigs were domesticated by 8,500 BC in the Near East[9] and 6,000 BC in China.[10] Domestication of the horse dates to around 4000 BC.[11] Cattle have been domesticated since approximately 10,500 years ago.[12] Chickens and other poultry may have been domesticated around 7000 BC.[13]

Types

The term "livestock" is nebulous and may be defined narrowly or broadly. Broadly, livestock refers to any breed or population of animal kept by humans for a useful, commercial purpose. This can mean domestic animals, semidomestic animals, or captive wild animals. Semidomesticated refers to animals which are only lightly domesticated or of disputed status. These populations may also be in the process of domestication.

Animal / Type Domestication status Wild ancestor Time of first captivity, domestication Area of first captivity, domestication Current commercial uses Picture Ref
Alpaca
Mammal, herbivore
domestic Vicuña Between 5000 BC and 4000 BC Andes Alpaca fiber, meat
Addax
Mammal, herbivore
domestic Addax 2500 BCE Egypt Meat, hides
Bali cattle
Mammal, herbivore
domestic Banteng Unknown Southeast Asia, Bali Meat, milk, draught
Bison
Mammal, herbivore
captive (see also Beefalo) N/A Late 19th century North America Meat, leather
Camel
Mammal, herbivore
domestic Wild dromedary and Bactrian camel Between 4000 BC and 1400 BC Asia Mount, pack animal, meat, milk, camel hair
Cattle
Mammal, herbivore
domestic Aurochs 6000 BC Southwest Asia, South Asia, North Africa Meat (beef, veal), milk, leather, draught
Capybara
Mammal, herbivore
captive Capybara Unknown South America Meat, skins, pet
Collared peccary
Mammal, omnivore
captive Collared peccary Unknown Brazil Meat, tusks, skins, pet
Deer
Mammal, herbivore
captive N/A First century AD UK Meat (venison), leather, antlers, antler velvet
Donkey
Mammal, herbivore
domestic African wild ass 4000 BC Egypt Mount, pack animal, draught, meat, milk
Eland
Mammal, herbivore
domestic Common eland, Giant eland Unknown South Africa, Kenya, Zimbabwe, West Africa Meat, milk, leather, hides, horns
Elk
Mammal, herbivore
captive Elk 1990s North America Meat, antlers, leather, hides
Fallow deer
Mammal, herbivore
semidomestic Fallow deer 9th century BC Mediterranean Basin Meat, antlers, hides, ornamentation
Gayal
Mammal, herbivore
domestic Gaur Unknown Southeast Asia Meat, draught
Goat
Mammal, herbivore
domestic Wild goat 8000 BC Southwest Asia Milk, meat, wool, leather, light draught
Guinea pig
Mammal, herbivore
domestic Cavia tschudii 5000 BC South America Meat, pet
Greater cane rat
Mammal, herbivore
captive Greater cane rat Unknown West Africa Meat
Greater kudu
Mammal, herbivore
captive Greater kudu Unknown South Africa Meat, hides, horns, leather, pet
Horse
Mammal, herbivore
domestic Wild horse 4000 BC Eurasian Steppes Mount, draught, milk, meat, pet, pack animal
Llama
Mammal, herbivore
domestic Guanaco 3500 BC Andes Pack animal, draught, meat, fiber
Mule
Mammal, herbivore
domestic Sterile Hybrid offspring of Jack donkey x mare (female horse)     Mount, pack animal, draught
Moose
Mammal, herbivore
domestic Moose 1940s Russia, Sweden, Finland, Alaska Meat, milk, antlers, research, draft
Muskox
Mammal, herbivore
domestic Muskox 1960s Alaska Meat, wool, milk
Pig
Mammal, omnivore
domestic Wild boar 7000 BC Eastern Anatolia Meat (pork), leather, pet, mount, research
Rabbit
Mammal, herbivore
domestic Wild rabbit AD 400-900 France Meat, fur, leather, pet, research
Reindeer
Mammal, herbivore
semidomestic Reindeer 3000 BC Northern Russia Meat, leather, antlers, milk, draught
Sika deer
Mammal, herbivore
domestic Sika deer Unknown Japan, China Meat, antlers, hides, leather, pet, tourism
Scimitar oryx
Mammal, herbivore
domestic Scimitar oryx 2320-2150 BC Egypt Meat, sacrifice, horns, hides, leather
Sheep
Mammal, herbivore
domestic Asiatic mouflon sheep Between 11000 and 9000 BC Southwest Asia Wool, milk, leather, meat (lamb and mutton)
Thorold's deer
Mammal, herbivore
captive Thorold's deer Unknown China Meat, antlers
White-tailed deer
Mammal, herbivore
captive White-tailed deer Unknown West Virginia, Florida, Colombia Meat, antlers, hides, pet
Water buffalo
Mammal, herbivore
domestic Wild Asian water buffalo (Arni) 4000 BC South Asia Mount, draught, meat, milk
Yak
Mammal, herbivore
domestic Wild yak 2500 BC Tibet, Nepal Meat, milk, fiber, mount, pack animal, draught
Zebu
Mammal, herbivore
domestic Aurochs 8000 BC India Meat, milk, draught, hides

 

Farming practices

Goat family with 1-week-old kid
Farrowing site in a natural cave in northern Spain

Traditionally, animal husbandry was part of the subsistence farmer's way of life, producing not only the food needed by the family but also the fuel, fertiliser, clothing, transport and draught power. Killing the animal for food was a secondary consideration, and wherever possible its products, such as wool, eggs, milk and blood (by the Maasai) were harvested while the animal was still alive.[14] In the traditional system of transhumance, people and livestock moved seasonally between fixed summer and winter pastures; in montane regions the summer pasture was up in the mountains, the winter pasture in the valleys.[15]

Animals can be kept extensively or intensively. Extensive systems involve animals roaming at will, or under the supervision of a herdsman, often for their protection from predators. Ranching in the Western United States involves large herds of cattle grazing widely over public and private lands.[16]Similar cattle stations are found in South America, Australia and other places with large areas of land and low rainfall. Ranching systems have been used for sheep, deer, ostrich, emu, llama and alpaca.[17] In the uplands of the United Kingdom, sheep are turned out on the fells in spring and graze the abundant mountain grasses untended, being brought to lower altitudes late in the year, with supplementary feeding being provided in winter.[18] In rural locations, pigs and poultry can obtain much of their nutrition from scavenging, and in African communities, hens may live for months without being fed, and still produce one or two eggs a week.[14] At the other extreme, in the more developed parts of the world, animals are often intensively managed; dairy cows may be kept in zero-grazing conditions with all their forage brought to them; beef cattle may be kept in high density feedlots;[19] pigs may be housed in climate-controlled buildings and never go outdoors;[20] poultry may be reared in barns and kept in cages as laying birds under lighting-controlled conditions. In between these two extremes are semi-intensive, often family run farms where livestock graze outside for much of the year, silage or hay is made to cover the times of year when the grass stops growing, and fertiliser, feed and other inputs are bought onto the farm from outside.[21]

Predation

Livestock farmers have suffered from wild animal predation and theft by rustlers. In North America, animals such as the gray wolf, grizzly bear, cougar, and coyote are sometimes considered a threat to livestock. In Eurasia and Africa, predators include the wolf, leopard, tiger, lion, dhole, Asiatic black bear, crocodile, spotted hyena, and other carnivores. In South America, feral dogs, jaguar, anacondas, and spectacled bears are threats to livestock. In Australia, the dingo, fox, and wedge-tailed eagle are common predators, with an additional threat from domestic dogs that may kill in response to a hunting instinct, leaving the carcass uneaten.[22][23]

Disease

Good husbandry, proper feeding, and hygiene are the main contributors to animal health on the farm, bringing economic benefits through maximised production. When, despite these precautions, animals still become sick, they are treated with veterinary medicines, by the farmer and the veterinarian. In the European Union, when farmers treat their own animals, they are required to follow the guidelines for treatment and to record the treatments given.[24] Animals are susceptible to a number of diseases and conditions that may affect their health. Some, like classical swine fever[25] and scrapie[26] are specific to one type of stock, while others, like foot-and-mouth disease affect all cloven-hoofed animals.[27] Where the condition is serious, governments impose regulations on import and export, on the movement of stock, quarantine restrictions and the reporting of suspected cases. Vaccines are available against certain diseases, and antibiotics are widely used where appropriate. At one time, antibiotics were routinely added to certain compound foodstuffs to promote growth, but this practice is now frowned on in many countries because of the risk that it may lead to antibiotic resistance.[28] Animals living under intensive conditions are particularly prone to internal and external parasites; increasing numbers of sea lice are affecting farmed salmon in Scotland.[29] Reducing the parasite burdens of livestock results in increased productivity and profitability.[30]

Transportation and marketing

Pigs being loaded into their transport

Since many livestock are herd animals, they were historically driven to market "on the hoof" to a town or other central location. The method is still used in some parts of the world.[31]

Truck transport is now common in developed countries.[32]

Local and regional livestock auctions and commodity markets facilitate trade in livestock. In other areas, livestock may be bought and sold in a bazaar, such as may be found in many parts of Central Asia.

In developing countries, providing access to markets has encouraged farmers to invest in livestock, with the result being improved livelihoods. For example, the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) has worked in Zimbabwe to help farmers make their most of their livestock herds.[33]

In stock shows, farmers bring their best livestock to compete with one another.[34]

Environmental impact

Livestock production requires large areas of land.

Animal husbandry has a significant impact on the world environment. It is responsible for somewhere between 20 and 33% of the fresh water usage in the world,[35] and livestock, and the production of feed for them, occupy about a third of the earth's ice-free land.[36] Livestock production is a contributing factor in species extinction, desertification,[37] and habitat destruction.[38] Animal agriculture contributes to species extinction in various ways. Habitat is destroyed by clearing forests and converting land to grow feed crops and for animal grazing, while predators and herbivores are frequently targeted and hunted because of a perceived threat to livestock profits; for example, animal husbandry is responsible for up to 91% of the deforestation in the Amazon region.[39] In addition, livestock produce greenhouse gases. Cows produce some 570 million cubic metres of methane per day,[40] that accounts for from 35 to 40% of the overall methane emissions of the planet.[41] Livestock is responsible for 65% of all human-related emissions of the powerful and long-lived greenhouse gas nitrous oxide.[41] As a result, ways of mitigating animal husbandry's environmental impact are being studied. Strategies include using biogas from manure.[42]

Economic and social benefits

The value of global livestock production in 2013 has been estimated at about 883 billion dollars, (constant 2005-2006 dollars).[43]

Livestock provide a variety of food and nonfood products; the latter include leather, wool, pharmaceuticals, bone products, industrial protein, and fats. For many abattoirs, very little animal biomass may be wasted at slaughter. Even intestinal contents removed at slaughter may be recovered for use as fertilizer. Livestock manure helps maintain the fertility of grazing lands. Manure is commonly collected from barns and feeding areas to fertilize cropland. In some places, animal manure is used as fuel, either directly (as in some developing countries), or indirectly (as a source of methane for heating or for generating electricity). In regions where machine power is limited, some classes of livestock are used as draft stock, not only for tillage and other on-farm use, but also for transport of people and goods. In 1997, livestock provided energy for between an estimated 25 and 64% of cultivation energy in the world's irrigated systems, and that 300 million draft animals were used globally in small-scale agriculture.[44]

Although livestock production serves as a source of income, it can provide additional economic values for rural families, often serving as a major contributor to food security and economic security. Livestock can serve as insurance against risk[45] and is an economic buffer (of income and/or food supply) in some regions and some economies (e.g., during some African droughts). However, its use as a buffer may sometimes be limited where alternatives are present,[46] which may reflect strategic maintenance of insurance in addition to a desire to retain productive assets. Even for some livestock owners in developed nations, livestock can serve as a kind of insurance.[47] Some crop growers may produce livestock as a strategy for diversification of their income sources, to reduce risks related to weather, markets and other factors.[48][49]

Many studies have found evidence of the social, as well as economic, importance of livestock in developing countries and in regions of rural poverty, and such evidence is not confined to pastoral and nomadic societies.[45][50][51][52][53]

Social values in developed countries can also be considerable. For example, in a study of livestock ranching permitted on national forest land in New Mexico, USA, it was concluded that "ranching maintains traditional values and connects families to ancestral lands and cultural heritage", and that a "sense of place, attachment to land, and the value of preserving open space were common themes". "The importance of land and animals as means of maintaining culture and way of life figured repeatedly in permittee responses, as did the subjects of responsibility and respect for land, animals, family, and community."[54]

In the US, profit tends to rank low among motivations for involvement in livestock ranching.[55] Instead, family, tradition and a desired way of life tend to be major motivators for ranch purchase, and ranchers "historically have been willing to accept low returns from livestock production."[56]

See also

References

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