Thursday, September 23, 2010

olive ridley turtle

The olive ridley turtle is named for the generally greenish color of its skin and shell, or carapace. It is closely related to the Kemp’s ridley, with the primary distinction being that olive ridleys are found only in warmer waters, including the southern Atlantic, Pacific and Indian Oceans.
Olive and Kemp’s ridleys are the smallest of the sea turtles, weighing up to 100 pounds (45 kilograms) and reaching only about 2 feet (65 centimeters) in shell length. The olive ridley has a slightly smaller head and smaller shell than the Kemp’s.
These turtles are solitary, preferring the open ocean. They migrate hundreds or even thousands of miles every year, and come together as a group only once a year for the arribada, when females return to the beaches where they hatched and lumber onshore, sometimes in the thousands, to nest.
Olive ridleys have nesting sites all over the world, on tropical and subtropical beaches. During nesting, they use the wind and the tide to help them reach the beach. Females lay about a hundred eggs, but may nest up to three times a year. The nesting season is from June to December.
The olive ridley is mostly carnivorous, feeding on such creatures as jellyfish, snails, crabs, and shrimp. They will occasionally eat algae and seaweed as well. Hatchlings, most of which perish before reaching the ocean, are preyed on by crabs, raccoons, pigs, snakes, and birds, among others. Adults are often taken by sharks.
Though the olive ridley is widely considered the most abundant of the marine turtles, by all estimates, it is in trouble. Rough estimates put the worldwide population of nesting females at about 800,000, but its numbers, particularly in the western Atlantic, have declined precipitously. The United States lists the western Atlantic population of olive ridleys as endangered and all other populations as threatened.
Many governments have protections for olive ridleys, but still, eggs are taken and nesting females are slaughtered for their meat and skin. Fishing nets also take a large toll, frequently snagging and drowning these turtles.

source: natgeo

Monday, September 20, 2010

Why we conserve Wildlife?

Modern technology has given us the tools to exploit the earths natural resources as never before. The material benefits have been enormous, but the environmental costs have been high. We have built roads and reservoirs, drained marshes, and bulldozed woodlands. Yet in doing this we are little by little eliminating the diversity and richness of the land and reducing the options for future choice.
There are many reasons for conserving wildlife. It is necessary for the maintenance of genetic diversity; plants and animals act as environmental indicators, they provide the natural materials for food and medicine; wildlife is pleasing to all and it provides amenity.
All living organisms are interrelated; all crops and domestic animals descend from wildlife and all depend on wild species directly or indirectly. All green plants and all animals (including humans) rely on micro-organisms cycling the chemical elements necessary for life, while many plants also depend on insects and other animals for fertilisation and dispersal. Together all organisms resemble a living body with each part dependent upon others. We do not know what the effect of losing any of these species would be.
Children are main users of natural spaces, even very small spaces near their homes. There is a real risk that children lose what they need for mental, physical and social development when places are tidied up by adults. Since children and wildlife often value the same features and details, what damages the interests of one will affect those of the other.

CONVENTION IN INTERNATIONAL TRADE OF ENDANGERED SPECIES

CITES (the Convention on International Trade in Endangered Species of Wild Fauna and Flora, also known as the Washington Convention) is an international agreement between governments, drafted as a result of a resolution adopted in 1963 at a meeting of members of the International Union for Conservation of Nature (IUCN). The text of the convention was agreed upon in 1973, and CITES entered into force on 1 July 1975. Its aim is to ensure that international trade in specimens of wild animals and plants does not threaten their survival and it accords varying degrees of protection to more than 33,000 species of animals and plants. In order to ensure that the General Agreement on Tariffs and Trade (GATT) was not violated, the Secretariat of GATT was consulted during the drafting process.
Only one species protected by CITES, the Spix's Macaw, has become extinct in the wild as a result of trade since the Convention entered into force (but see case studies in Hutton and Dickinson and Stiles for further discussion of the role CITES has played in the fate of particular species).

http://www.cites.org/