A series of 2 case studies into the causes, impacts and challenges presented by large youthful populations in the Gambia, and a large ageing population in the UK.
Runtime: 30 minutes
Managing Populations - Feral horse - Netflix
A feral horse is a free-roaming horse of domesticated ancestry. As such, a feral horse is not a wild animal in the sense of an animal without domesticated ancestors. However, some populations of feral horses are managed as wildlife, and these horses often are popularly called “wild” horses. Feral horses are descended from domestic horses that strayed, escaped, or were deliberately released into the wild and remained to survive and reproduce there. Away from humans, over time, these animals' patterns of behavior revert to behavior more closely resembling that of wild horses. Some horses that live in a feral condition but may be occasionally handled or managed by humans, particularly if privately owned, are referred to as “semi-feral”. Feral horses live in groups called a band, herd, harem, or mob. Feral horse herds, like those of wild horses, are usually made up of small bands led by a dominant mare, containing additional mares, their foals, and immature horses of both sexes. There is usually one herd stallion, though occasionally a few less-dominant males may remain with the group. Horse “herds” in the wild are best described as groups of several small bands who share a common territory. Bands are usually on the small side, as few as three to five animals, but sometimes over a dozen. The makeup of bands shifts over time as young animals are driven out of the band they were born into and join other bands, or as young stallions challenge older males for dominance. However, in a given closed ecosystem (such as the isolated refuges in which most feral horses live today), to maintain genetic diversity, the minimum size for a sustainable free-roaming horse or burro population is 150–200 animals.
Managing Populations - Modern feral horses - Netflix
Modern types of feral horses that have a significant percentage of their number living in a feral state, even though there may be some domesticated representatives, include the following types, landraces, and breeds: Alberta Mountain Horse or Alberta “Wildie”, found in the foothills of the Eastern Slopes of the Rocky Mountains of Alberta, Canada Banker horse, on the Outer Banks of North Carolina Brumby, the feral horse of Australia Chincoteague Pony, on Assateague Island off the coasts of Virginia and Maryland Cumberland Island horse, on Cumberland Island off the coast of southern Georgia Danube Delta horse, in and around Letea Forest, between the Sulina and Chilia branches of the Danube Elegesi Qiyus Wild Horse (Cayuse), Canada; lives in the Nemaiah Valley, British Columbia Garrano, a feral horse native to northern Portugal Kaimanawa horse, New Zealand Kundudo horse, in the Kundudo region, Ethiopia; threatened with extinction Marismeño, present in the Doñana National Park in Huelva, Spain Misaki horse, Japan Lavradeiros, a feral horse in Northern Brazil Mustang, legally protected by the Wild and Free-Roaming Horses and Burros Act of 1971 in the western United States Namib Desert Horse, Namibia Nokota horse Small wild horses are established in the páranos of the Sierra Nevada de Santa Marta in Colombia and are believed to have descended from introductions made by Spanish conquistadors. Sorraia, a feral horse native to southern Portugal Sable Island Horse found on an island off the coast of Nova Scotia Welsh Pony, mostly domesticated, but a feral population of about 180 animals roams the Carneddau hills of North Wales. Other populations roam the eastern parts of the Brecon Beacons National Park. Delft Island Feral Horses are believed to be the descendants of horses kept on the island from the time of Delft’Dutch occupation in Sri Lanka.
Managing Populations - References - Netflix