How and Why Guinea Pigs Were Domesticated

How and Why Guinea Pigs Were Domesticated Guinea pigs (Cavia porcellus) are small rodents raised in the South American Andes mountains not as friendly pets, but primarily for dinner. Called cuys, they reproduce rapidly and have large litters. Today guinea pig feasts are connected with religious ceremonies throughout South America, including feasts associated with Christmas, Easter, Carnival, and Corpus Christi. Modern domesticated adult Andean guinea pigs range from eight to eleven inches long and weigh between one and two pounds. They live in harems, approximately one male to seven females. Litters are generally three to four pups, and sometimes as many as eight; the gestation period is three months. Their lifespan is between five and seven years. Domestication Date and Location Guinea pigs were domesticated from the wild cavy (most likely Cavia tschudii, although some scholars suggest Cavia aperea), found today in the western (C. tschudii) or central (C. aperea) Andes. Scholars believe that domestication occurred between 5,000 and 7,000 years ago, in the Andes. Changes identified as the effects of domestication are increased body size and litter size, changes in behavior and hair coloration. Cuys are naturally gray, domesticated cuys have multicolored or white hair. Keeping Guinea Pigs in the Andes Since both wild and domestic forms of guinea pigs can be studied in a laboratory, behavioral studies of the differences have been completed. Differences between wild and domestic guinea pigs are in some part behavioral and part physical. Wild cuys are smaller and more aggressive  Ã¢â‚¬â€¹and pay more attention to their local environment than domestic ones and wild male cuys do not tolerate each other and live in harems with one male and several females. Domestic guinea pigs are larger and more tolerant of multi-male groups, and exhibit increased levels of social grooming of one another and increased courtship behavior. In traditional Andean households, cuys were (and are) kept indoors but not always in cages; a high stone sill at the entrance of a room keeps cuys from escaping. Some households built special rooms or cubby holes for cuys, or more typically keep them in the kitchens. Most Andean households kept at least 20 cuys; at that level, using a balanced feeding system, Andean families could produce at least 12 pounds of meat per month without decreasing their flock. Guinea pigs were fed barley and kitchen scraps of vegetables, and the residue from making chicha (maize) beer. Cuys were valued in folk medicines and its entrails were used to divine human illness. Subcutaneous fat from the guinea pig was used as a general salve. Archaeology and the Guinea Pig The first archaeological evidence of the human use of guinea pigs dates to about 9,000 years ago. They may have been domesticated as early as 5,000 BC, probably in the Andes of Ecuador; archaeologists have recovered burned bones and bones with cut marks from midden deposits beginning about that time. By 2500 BC, at sites such as the Temple of the Crossed Hands at Kotosh and at Chavin de Huantar, cuy remains are associated with ritual behaviors. Cuy effigy pots were made by the Moche (circa AD 500-1000). Naturally mummified cuys have been recovered from the Nasca site of Cahuachi and the late prehispanic site of Lo Demas. A cache of 23 well-preserved individuals was discovered at Cahuachi; guinea pig pens were identified at the Chimu site of Chan Chan. Spanish chroniclers including Bernabe Cobo and Garcilaso de la Vega wrote about the role of the guinea pig in Incan diets and ritual. Becoming a Pet Guinea pigs were introduced into Europe during the sixteenth century, but as pets, rather than food. Remains of one guinea pig were recently discovered within excavations at the town of Mons, Belgium, representing the earliest archaeological identification of guinea pigs in Europeand similar in time to the 17th-century paintings which illustrate the creatures, such as the 1612 Garden of Eden by Jan Brueghel the Elder. The excavations at the site of a proposed parking lot revealed a living quarter which had been occupied beginning in medieval times. The remains include eight bones of a guinea pig, all found within a middle-class cellar and adjacent cesspit, radiocarbon dated between AD 1550-1640, shortly after the Spanish conquest of South America. The recovered bones included a complete skull and the right part of the pelvis, leading Pigià ¨re et al. (2012) to conclude that this pig was not eaten, but rather kept as a domestic animal and discarded as a complete carcass. Sources History of the Guinea Pig  from archaeologist Michael Forstadt. Asher, Matthias. Large males dominate: Ecology, social organization, and mating system of wild cavies, the ancestors of the guinea pig. Behavioral Ecology and Sociobiology, Tanja Lippmann, Jà ¶rg Thomas Epplen, et al., Research Gate, July 2008. Gade DW. 1967.  The Guinea Pig in Andean Folk Culture.  Geographical Review  57(2):213-224. Kà ¼nzl C, and Sachser N. 1999.  The Behavioral Endocrinology of Domestication: A Comparison between the Domestic Guinea Pig (Cavia apereaf.porcellus) and Its Wild Ancestor, the Cavy (Cavia aperea).  Hormones and Behavior  35(1):28-37. Morales E. 1994.  The Guinea Pig in the Andean Economy: From Household Animal to Market Commodity.  Latin American Research Review 29(3):129-142. Pigià ¨re F, Van Neer W, Ansieau C, and Denis M. 2012.  New archaeozoological evidence for the introduction of the guinea pig to Europe.  Journal of Archaeological Science  39(4):1020-1024. Rosenfeld SA. 2008.  Delicious guinea pigs: Seasonality studies and the use of fat in the pre-Columbian Andean diet.  Quaternary International  180(1):127-134. Sachser, Norbert. Of Domestic and Wild Guinea Pigs: Studies in Sociophysiology, Domestication, and Social Evolution. Naturwissenschaften, Volume 85, Issue 7, SpringerLink, July 1998. Sandweiss DH, and Wing ES. 1997.  Ritual Rodents: The Guinea Pigs of Chincha, Peru.  Journal of Field Archaeology  24(1):47-58. Simonetti JA, and Cornejo LE. 1991.  Archaeological Evidence of Rodent Consumption in Central Chile.  Latin American Antiquity  2(1):92-96. Spotorno AE, Marin JC, Manriquez G, Valladares JP, Rico E, and Rivas C. 2006.  Ancient and modern steps during the domestication of guinea pigs (Cavia porcellus L.).  Journal of Zoology  270:57–62. Stahl PW. 2003.  Pre-columbian Andean animal domesticates at the edge of empire.  World Archaeology  34(3):470-483. Trillmich F, Kraus C, Kà ¼nkele J, Asher M, Clara M, Dekomien G, Epplen JT, Saralegui A, and Sachser N. 2004. Species-level differentiation of two cryptic species pairs of wild cavies, genera Cavia and Galea, with a discussion of the relationship between social systems and phylogeny in the Caviinae.  Canadian Journal of Zoology  82:516-524.

Battle of Antietam in the American Civil War

Battle of Antietam in the American Civil War The Battle of Antietam was fought September 17, 1862, during the American Civil War (1861-1865). In the wake of his stunning victory at the Second Battle of Manassas in late August 1862, General Robert E. Lee began moving north into Maryland with the goal of obtaining supplies and cutting the rail links to Washington. This move was endorsed by Confederate President Jefferson Davis who believed that a victory on Northern soil would increase the likelihood of recognition from Britain and France. Crossing the Potomac, Lee was slowly pursued by Major General George B. McClellan who had recently been reinstated to overall command of Union forces in the area. Armies Commanders Union Major General George B. McClellan87,000 men Confederate General Robert E. Lee45,000 men Battle of Antietam - Advancing to Contact Lees campaign was soon compromised when Union forces found a copy of Special Order 191 which laid out his movements and showed that his army was split into several smaller contingents. Written on September 9, a copy of the order was found at the Best Farm south of Frederick, MD by Corporal Barton W. Mitchell of the 27th Indiana Volunteers.   Addressed to Major General D.H. Hill, the document was wrapped around three cigars and caught Mitchells eye as it lay in the grass. Quickly passed up the Union chain of command and recognized as authentic, it soon arrived at McClellans headquarters.   Assessing the information, the Union commander commented, Here is a paper with which, if I cannot whip Bobby Lee, I will be willing to go home.   Despite the time-sensitive nature of the intelligence contained in Special Order 191, McClellan displayed his characteristic slowness and hesitated before acting on this critical information. While Confederate troops under Major General Thomas Stonewall Jackson were capturing Harpers Ferry, McClellan pressed west and engaged Lees men in the passes through the mountains. In the resulting Battle of South Mountain on September 14, McClellans men attacked the out-numbered Confederate defenders at Foxs, Turners, and Cramptons Gaps.   Though the gaps were taken, fighting lasted through the day and bought time for Lee to order his army to reconcentrate at Sharpsburg. McClellans Plan Bringing his men together behind Antietam Creek, Lee was in a precarious position with the Potomac at his back and only Botelers Ford to the southwest at Shepherdstown as an escape route. On September 15, when the lead Union divisions were sighted, Lee only had 18,000 men at Sharpsburg. By that evening, much of the Union army had arrived. Though an immediate attack on September 16 likely would have overwhelmed the scrambling Lee, the ever-cautious McClellan, who believed Confederate forces to number around 100,000, did not begin probing the Confederate lines until late that afternoon. This delay allowed Lee to bring his army together, though some units were still en route. Based on the intelligence gathered on the 16th, McClellan decided to open the battle the next day by attacking from the north as this would allow his men to cross the creek at the undefended upper bridge. The assault was to be mounted by two corps with an additional two waiting in reserve. This attack would be supported by a diversionary attack by Major General Ambrose Burnsides IX Corps against the lower bridge south of Sharpsburg. Should the assaults proved successful, McClellan intended to attack with his reserves over the middle bridge against the Confederate center. Union intentions became clear on the evening of September 16, when Major General Joseph Hookers I Corps skirmished with Lees men in the East Woods north of town. As a result, Lee, who had placed Jacksons men on his left and Major General James Longstreets on the right, shifted troops to meet the anticipated threat (Map). The Fighting Begins in the North Around 5:30 AM on September 17, Hooker attacked down the Hagerstown Turnpike with the goal of capturing the Dunker Church, a small building on a plateau to the south. Encountering Jacksons men, brutal fighting began in the Miller Cornfield and the East Woods. A bloody stalemate ensued as the outnumbered Confederates held and mounted effective counterattacks. Adding Brigadier General Abner Doubledays division into the fight, Hookers troops began to push the enemy back. With Jacksons line near collapse, reinforcements arrived around 7:00 AM as Lee stripped his lines elsewhere of men. Counterattacking, they drove Hooker back and the Union troops were forced to cede the Cornfield and West Woods. Badly bloodied, Hooker called for aid from Major General Joseph K. Mansfields XII Corps. Advancing in columns of companies, XII Corps was hammered by Confederate artillery during their approach and Mansfield was mortally wounded by a sniper. With Brigadier General Alpheus Williams in command, XII Corps renewed the assault. While one division was halted by enemy fire, Brigadier General George S. Greenes men were able to break through and reach the Dunker Church (Map). While Greenes men came under heavy fire from the West Woods, Hooker was wounded as he tried to rally men to exploit the success. With no support arriving, Greene was forced to pull back. In an effort to force the situation above Sharpsburg, Major General Edwin V. Sumner was directed to contribute two divisions from his II Corps to the fight. Advancing with Major General John Sedgwicks division, Sumner lost contact with Brigadier General William Frenchs division before leading a rash attack into the West Woods. Quickly taken under fire on three sides, Sedgwicks men were forced to retreat (Map). Attacks in the Center By mid-day, fighting in the north quieted as Union forces held the East Woods and the Confederates the West Woods. Having lost Sumner, French spotted elements of Major General D.H. Hills division to the south. Though only numbering 2,500 men and tired from fighting earlier in the day, they were in a strong position along a sunken road. Around 9:30 AM, French began a series of three brigade-sized attacks on Hill. These failed in succession as Hills troops held. Sensing danger, Lee committed his final reserve division, led by Major General Richard H. Anderson, to the fight. A fourth Union assault saw the famed Irish Brigade storm forward with its green flags flying and Father William Corby shouting words of conditional absolution.   The stalemate was finally broken when elements of Brigadier General John C. Caldwells brigade succeeded in turning the Confederate right. Taking a knoll that overlooked the road, Union soldiers were able to fire down the Confederate lines and force the defenders to retreat. A brief Union pursuit was halted by Confederate counterattacks. As the scene quieted around 1:00 PM, a great gap had been opened in Lees lines. McClellan, believing that Lee had over 100,000 men, repeatedly refused to commit the over 25,000 men he had in reserve to exploiting the breakthrough despite the fact that Major General William Franklins VI Corps was in position. As a result, the opportunity was lost (Map). Blundering in the South In the south, Burnside, angered by command rearrangements, did not begin moving until around 10:30 AM. As a result, many of the Confederate troops that had originally been facing him were withdrawn to block the other Union attacks. Tasked with crossing the Antietam to support Hookers actions, Burnside was in position to cut off Lees retreat route to Botelers Ford. Ignoring the fact that the creek was fordable at several points, he focused on taking Rohrbachs Bridge while dispatching additional troops downstream to Snavelys Ford (Map) Defended by 400 men and two artillery batteries atop a bluff on the western shore, the bridge became Burnsides fixation as repeated attempts to storm it failed. Finally taken around 1:00 PM, the bridge became a bottleneck which slowed Burnside advance for two hours. The repeated delays permitted Lee to shift troops south to meet the threat. They were supported by the arrival of Major General A.P. Hills division from Harpers Ferry. Attacking Burnside, they shattered his flank. Though possessing greater numbers, Burnside lost his nerve and fell back to the bridge. By 5:30 PM, the fighting had ended. Aftermath of the Battle of Antietam The Battle of Antietam was the bloodiest single day in American military history. Union losses numbered 2,108 killed, 9,540 wounded, and 753 captured/missing while the Confederates suffered 1,546 killed, 7,752 wounded, and 1,018 captured/missing. The next day Lee prepared for another Union attack, but McClellan, still believing he was out-numbered did nothing. Eager to escape, Lee crossed the Potomac back into Virginia. A strategic victory, Antietam allowed President Abraham Lincoln to issue the Emancipation Proclamation  which freed slaves in Confederate territory. Remaining idle at Antietam until late October, despite requests from the War Department to pursue Lee, McClellan was removed command on November 5 and replaced by Burnside two days later. Selected Sources CWSAC Battle Summaries: AntietamAntietam on the Web