Danger of extinction 3
Danger of extinction
A species becomes extinct when his last existing copy, dies. Therefore, the extinction becomes a certainty when there are no able to reproduce and give rise to a new generation member. Also a species may becomeextinct functionally when only survives a small number of members who are unable to play due to problems of health, age, geographical distance due to a very large range, due to lack of individuals of both sexes (in species that reproduce sexually), or other reasons.
Identify a species extinction (or pseudoextinción) requires that it is clearly defined. If finally declared extinct, the species inquestion must be clearly distinguished from any other species ancestor, descendant or other related. The extinction of a species (or replacement by a descendant) plays a key role in the theory of punctuated equilibrium of Stephen Jay Gould and Niles Eldredge.
In ecology, the term extinction also is often used informally to refer to a local extinction, in which the species ceases to exist in aparticular area, while still living in another place. This phenomenon is also known as removal. The local extinctions may precede a replacement of the species from other places copies; wolf reintroduction is an example of this. Species that are not extinct called existing, and the existing species are under threat of extinction fall into categories such as threatened, endangered or criticallyendangered species.
An important aspect of the extinction today are attempts to preserve species at risk of extinction, which is reflected in the creation of the State of preservation "Extinct in wild" (abbreviated as EW) humans. The species listed under this prepared by the IUCN Red List status are not known with live specimens in the wild or natural state, and the only existing copies are kept in zoosor other artificial environments. Some of these species are functionally extinct, due to no longer part of their natural habitat and is unlikely to be reintregadas in nature.  Some institutions are trying to maintain a viable for species that, if possible, to reintroducirse to its natural state through carefully planned parenting programmes population.
The extinction of a species can cause achain effect in the wild, causing the extinction of other species. This is also called to "chains of extinction".
Today, many environmental organizations and Governments are concerned about the extinction of species due to human intervention and ensured its prevention. Artificial causes of extinction are hunting, pollution, habitat destruction, the introduction of new predators, among others.Tigrillo
El Tigrillo (Leopardus tigrinus) is one of the species in the Felidae. This species is assigned to the cats, Felinae subfamily within the family Felidae.
El Tigrillo is a native of Central America and South America, its distribution ranges from Costa Rica to northern Argentina.
Leopardus tigrinus is maintained at elevations of 600 to 4.300meters. You may also dwells at lower elevations.
This cat prefers overgrown areas.
The gestation period in this species is from 74 to 76 days. Usually the mother has only one puppy in each birth, but can be up to three. Newborns weigh from 92 to 134 grams. Open the eyes of the 8 to 17 days old.
Leopardus tigrinus longevity is estimated to be about 17 years,is documented in captivity for 20 years.
El Tigrillo feeds on small mammals and birds.
Adults Leopardus tigrinus head length and body reach 38 to 59 cm, plus the tail of 25-42 cm. They weigh between 2 and 3.5 kilograms.
The ocelot (from the Nahuatl "ocelotl") (Leopardus pardalis before Felis pardalis) is a species of carnivorous mammal of the...