Essay example --

The impact of non-native species and invasive threats are one of the most serious threats that native amphibians are facing today. Many invasive species are able to adapt to their new environments quickly. They can often out-compete natives for food resources or they simply prey on the native species. Amphibian declines have become an increasing issue. While amphibian diversity is severely threatened by habitat destruction, the threat from non-native predation and competition is rapidly contributing to amphibian population declines (Ficetola et. al, 2007; Young et. al, 2001). Amphibians are threatening amphibians, and the threat from invasive species is a global issue. In Mexico and Central America this threat is just as real if not more so due to the tropical rich biodiversity. Many of the southern Central American countries boast some of the richest ecosystems in biodiversity in the world (Reid, 1993; Young et. al, 2001). American bullfrog (Rana catesbeinana) The American bullfrog (Rana catesbeinana), a member of the family Ranidae, or â€Å"true frogs† is threatening several habitats and native species in Central America. Native to North America, the American bullfrogs are found in freshwater habitats from Nova Scotia, Canada, throughout the eastern United States into Northern east Mexico. (see figure 1-1) Among the largest frogs in North America, they are easily distinguishable by their size. The bullfrog is a large amphibian that challenges native amphibians for food and habitat resources, but the bullfrog has a voracious appetite and will consume any prey that it fit into their mouths. They can grow to a length of eight inches and weight up to two pounds in their native habitats. In artificial market nurseries they... ...at attracts a collector. Unfortunately like many exotic pets, the owners soon lose interest and instead of doing the responsible things, by finding a suitable owner, they release them thinking that it’s an acceptable practice. Management and inspection of the plant nurseries and the pet trade is still poorly governed. While some countries are implementing policies and regulations on inspections and trades it is will continue to be a problem. Solutions must come from the international community. It must also include educating traders, collectors, inspectors as well as other stakeholders and the public. The small size of theses frogs coupled with the high procreation rate has made control of established colonies difficult to manage. Several countries that have been infested by this tree frog are doing live captures and then humanely euthanatizing individuals.