Overpopulation in the context of Mortality rate

An ecological or environmental crisis occurs when changes to the environment of a species or population destabilizes its continued survival. Some of the important causes include:

• Degradation of an abiotic ecological factor (for example, increase of temperature, less significant rainfalls)
• Increased pressures from predation
• Rise in the number of individuals (i.e. overpopulation)

The evolutionary theory of punctuated equilibrium sees infrequent ecological crises as a potential driver of rapid evolution.

Hunting is the human practice of seeking, pursuing, capturing, and killing wildlife or feral animals. The most common reasons for humans to hunt are to obtain the animal's body for meat and useful animal products (fur/hide, bone/tusks, horn/antler, etc.), for recreation/taxidermy (see trophy hunting), although it may also be done for resourceful reasons such as removing predators dangerous to humans or domestic animals (e.g. wolf hunting), to eliminate pests and nuisance animals that damage crops/livestock/poultry or spread diseases (see varminting), for trade/tourism (see safari), or for ecological conservation against overpopulation and invasive species (commonly called a cull).

Recreationally hunted species are generally referred to as the game, and are usually mammals and birds. A person participating in a hunt is a hunter or (less commonly) huntsman; a natural area used for hunting is called a game reserve; and an experienced hunter who helps organise a hunt and/or manage the game reserve is also known as a gamekeeper.

Castration is any action, surgical, chemical, or otherwise, by which a male loses use of the testicles: the male gonad. Surgical castration is bilateral orchiectomy (excision of both testicles), while chemical castration uses pharmaceutical drugs to deactivate the testes. Some forms of castration cause sterilization (permanently preventing the castrated person or animal from reproducing); it also greatly reduces the production of hormones, such as testosterone and estrogen. Surgical castration in animals is often called neutering.

Castration of animals is intended to favor a desired development of the animal or of its habits, as an anaphrodisiac or to prevent overpopulation. The parallel of castration for female animals is spaying. Castration may also refer medically to oophorectomy in female humans and animals.

Gardi Sugdub, also spelled Cartí Sugtupu, is an island in the San Blas Archipelago in the Panamanian comarca indígena of Guna Yala, 400m long and 150m wide. It is the southernmost and largest of four populated Carti Islands (the others are Cartí Tupile in the north, Carti Yandup in the west, and Carti Muladub in the east), and lies 1200 meters off the northern coast of mainland Panama. The island houses a small harbour and a museum, as well as a now-disused schoolhouse. Its indigenous inhabitants are Guna.

Discussions of relocation to a site on the mainland thanks to overpopulation on the island were first raised by Guna elders in 2008. The Panamanian government constructed the new village of Isber Yala between 2015 and 2024, construction being delayed due to funding issues, and following its completion in June 2024, 300 families moved from Gardi Sugdub into the new village.

Species reintroduction is the deliberate release of a species into the wild, from captivity or other areas where the organism is capable of survival. The goal of species reintroduction is to establish a healthy, genetically diverse, self-sustaining population to an area where it has been extirpated, or to augment an existing population. Species that may be eligible for reintroduction are typically threatened or endangered in the wild. However, reintroduction of a species can also be for pest control; for example, wolves being reintroduced to a wild area to curb an overpopulation of deer. Because reintroduction may involve returning native species to localities where they had been extirpated, some prefer the term "reestablishment".

Humans have been reintroducing species for food and pest control for thousands of years. However, the practice of reintroducing for conservation is much younger, starting in the 20th century.

Luxembourgish Americans are Americans of Luxembourgish ancestry. According to the United States' 2000 census, there were 45,139 Americans of full or partial Luxembourgish descent. In 1940, the number of Americans with Luxembourgish ancestry was around 100,000.

The first families from Luxembourg arrived in the United States, around 1842, fleeing from the overpopulation and economic change in the newly independent country. They worked in the field, as was traditional in their country.

Isber Yala, or Nuevo Cartí, is a town in the Panamanian comarca indígena (indigenous territory) of Guna Yala, close to the coast and Cartí Airport.

It was built with funding from the Panamanian government and Inter-American Development Bank to house the population of the island of Gardi Sugdub, which had been increasingly suffering from overpopulation; most of the population of Gardi Sugdub moved to Isberyala in 2024.

The near future has been used as a setting in many works, usually but not limited to the genre of science fiction. It has become increasingly common in works from the 18th century onward, with some of the classic works in the genre being Jules Verne's Journey to the Centre of the Earth (1864) and H. G. Wells' The War of the Worlds (1898). 20th century saw works such as George Orwell's Nineteen Eighty-Four (1949) or the novels of William Gibson, the latter representing the emergence of the popular cyberpunk genre. While some, particularly early, works of this genre are optimistic showcases of technological and societal progress, many others are discussing emergent social problems such as environmental problems, overpopulation, oppressive political regimes or the possibility of a nuclear holocaust.