Domestic Pig

Lore & Background

The domestication of the pig is a dual-origin story, occurring independently in Eurasia and East Asia. In the Fertile Crescent 10,000-11,000 years ago, zooarchaeology indicates that pigs were among the first livestock to be domesticated. In East Asia 8,000 years ago, pigs were domesticated from wild boar that were genetically different from those found in the Fertile Crescent. One study has concluded that human selection for domestic traits likely counteracted the homogenizing effect of gene flow from wild boars into pigs and created domestication islands in the genome. The same process may also apply to other domesticated animals. Unlike other domestic species, which were primarily selected for production-related traits, dogs were initially selected for their behaviors; the source does not specify the primary selection criteria for pigs.

In Their Own Story

Morning mist clung to the mud as a pig's snout, a sensitive radar of cartilage and nerve endings, dug deep into the damp earth, hunting for grubs and roots hidden beneath. The pig paused, ears swiveling toward a distant sound before letting out a low, resonant grunt. Nearby, a piglet squealed in pure delight, chasing a fallen leaf with frantic energy, while the matriarch watched with calm, dark eyes—her presence commanding the small group without a sound. To an outsider, it was a simple farmyard tableau; to the pig, it was a complex negotiation of hierarchy, hunger, and safety, played out in the quiet, rhythmic language of dawn.

Reader's Guide

Domestic pigs thrive in environments as varied as the breeds themselves. As opportunistic omnivores, their menu is equally diverse, spanning roots, tubers, fruits, grains, insects, small vertebrates, and human food scraps. They are deeply social creatures that organize into groups. The source notes that certain animal species make better candidates for domestication because they exhibit certain behavioral characteristics, including the size and organization of their social structure, the availability and the degree of selectivity in their choice of mates, the ease and speed with which the parents bond with their young, and the maturity and mobility of the young at birth. The source does not provide specific details on pig social structure, weight ranges, or lifespan.

Did You Know?

• In East Asia 8,000 years ago, pigs were domesticated from wild boar that were genetically different from those found in the Fertile Crescent.
• In the Fertile Crescent 10,000-11,000 years ago, zooarchaeology indicates that pigs were among the first livestock to be domesticated.
• One study has concluded that human selection for domestic traits likely counteracted the homogenizing effect of gene flow from wild boars into pigs and created domestication islands in the genome.
• The source notes that pigs may have followed a commensal pathway into domestication, adapted to a human niche.
• The source states that the biomass of domestic cattle alone is now greater than that of all wild mammals combined, but does not provide a specific comparison for pigs.