As the global human population exceeded 7 billion this year, livestock populations are also on the rise.
As the population soarsâit topped 7 billion in November 2011, up from just 3 billion in the 1960s, according to the United Nationsâresearchers are asking whether there is enoughÂ livestock to keep pace with worldwide demand.
âThe big question is, âWill we have enough food?ââ notes Nancy Morgan, livestock economist for the United Nations Food and Agriculture Organization. âWith the existing animal [population] and good management practices, there is enough livestock to feed the world.â
With 1.3 billion residents, China is the most populated nation in the world; itâs also the world leader in the number of chickens and pigs. The largest number of cattle is found in Brazil and India. In fact, India has become one of the top five beef-producing countries, thanks to a rise in the demand for dairy products creating an increased number of male cattle available for slaughter.
The resurgence of the âWhereâs the Beef?â ad campaign might be apt given that the U.S., which together with Brazil supplies one-third of global beef production and exports, has reduced cattle herds to their lowest levels since the 1950s due toÂ severe drought in major grazing areas.
Canada and several South American countries, including Brazil and Argentina, are also experiencing significant declines in cattle.
The number of cattle in Kazakhstan is on the rise thanks to government subsidies for breeding animals and feed.
Asia is home to 65 percent of the global pig population. Although pork is still plentiful, disease outbreaks in 2010 took a toll on pig herds; the Republic of Korea lost one-third of its pig population. The nuclear fallout inÂ Japan led to lower piglet births in affected provinces; the nation has also suffered from a 13-percent reduction in the number of pig farms since 2008.
If it seems staggering to imagine that the human population has more than doubled in the past 50 years, consider this: In 1961, there were only 3.9 billion chickens worldwideâabout one per person; the chicken population has skyrocketed to 19 billion, or nearly three chickens for every person on the planet. There are more than 455 million chickens in the U.S. alone, according to the USDAâs National Agriculture Statistics Service.
According to Morgan, poultry has the fastest-growing population among livestock because of its low cost of input and low market price.
âIt takes just 2 kilograms of grain to produce 1 kilogram of meat,â she explains.
Morgan is quick to point out that while itâs interesting to assess livestock populations around the globe, the total number of animals is less important than how those animals are used.
The real goal is figuring out âhow to increase production without increasing the number of animals,â she says. âWe donât want to increase the number of animals because of soil erosion and other environmental issues; we need to get more meat from the same number of animals to meet the population demand.â
The FAO is not advocating for increased use of growth hormones or similar measures; instead, Morgan cites the need for better management of livestock, including vaccinations, to ensure long-term health.
âItâs a matter of giving people the tools, not increasing populations,â she says.